Chris Lattner | c0561f2 | 2010-04-07 18:10:38 +0000 | [diff] [blame] | 1 | //===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===// |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 4ee451d | 2007-12-29 20:36:04 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the AsmPrinter class. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 14 | #define DEBUG_TYPE "asm-printer" |
Evan Cheng | 932f022 | 2006-03-03 02:04:29 +0000 | [diff] [blame] | 15 | #include "llvm/CodeGen/AsmPrinter.h" |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 16 | #include "DwarfDebug.h" |
| 17 | #include "DwarfException.h" |
Chandler Carruth | d04a8d4 | 2012-12-03 16:50:05 +0000 | [diff] [blame] | 18 | #include "llvm/ADT/SmallString.h" |
| 19 | #include "llvm/ADT/Statistic.h" |
| 20 | #include "llvm/Analysis/ConstantFolding.h" |
| 21 | #include "llvm/Assembly/Writer.h" |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 22 | #include "llvm/CodeGen/GCMetadataPrinter.h" |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 23 | #include "llvm/CodeGen/MachineConstantPool.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 24 | #include "llvm/CodeGen/MachineFrameInfo.h" |
David Greene | fe37ab3 | 2009-08-18 19:22:55 +0000 | [diff] [blame] | 25 | #include "llvm/CodeGen/MachineFunction.h" |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 26 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 27 | #include "llvm/CodeGen/MachineLoopInfo.h" |
Chris Lattner | 84bc542 | 2007-12-31 04:13:23 +0000 | [diff] [blame] | 28 | #include "llvm/CodeGen/MachineModuleInfo.h" |
Chandler Carruth | d04a8d4 | 2012-12-03 16:50:05 +0000 | [diff] [blame] | 29 | #include "llvm/DebugInfo.h" |
Chandler Carruth | 0b8c9a8 | 2013-01-02 11:36:10 +0000 | [diff] [blame] | 30 | #include "llvm/IR/DataLayout.h" |
| 31 | #include "llvm/IR/Module.h" |
| 32 | #include "llvm/IR/Operator.h" |
Chris Lattner | 736e31d | 2010-04-04 18:34:07 +0000 | [diff] [blame] | 33 | #include "llvm/MC/MCAsmInfo.h" |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 34 | #include "llvm/MC/MCContext.h" |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 35 | #include "llvm/MC/MCExpr.h" |
David Greene | 3ac1ab8 | 2009-07-16 22:24:20 +0000 | [diff] [blame] | 36 | #include "llvm/MC/MCInst.h" |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 37 | #include "llvm/MC/MCSection.h" |
| 38 | #include "llvm/MC/MCStreamer.h" |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 39 | #include "llvm/MC/MCSymbol.h" |
Chandler Carruth | d04a8d4 | 2012-12-03 16:50:05 +0000 | [diff] [blame] | 40 | #include "llvm/Support/ErrorHandling.h" |
| 41 | #include "llvm/Support/Format.h" |
| 42 | #include "llvm/Support/MathExtras.h" |
| 43 | #include "llvm/Support/Timer.h" |
Chris Lattner | 45111d1 | 2010-01-16 21:57:06 +0000 | [diff] [blame] | 44 | #include "llvm/Target/Mangler.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 45 | #include "llvm/Target/TargetInstrInfo.h" |
Chris Lattner | 0336fdb | 2006-10-06 22:50:56 +0000 | [diff] [blame] | 46 | #include "llvm/Target/TargetLowering.h" |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 47 | #include "llvm/Target/TargetLoweringObjectFile.h" |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 48 | #include "llvm/Target/TargetOptions.h" |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 49 | #include "llvm/Target/TargetRegisterInfo.h" |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 50 | using namespace llvm; |
| 51 | |
Chris Lattner | c0561f2 | 2010-04-07 18:10:38 +0000 | [diff] [blame] | 52 | static const char *DWARFGroupName = "DWARF Emission"; |
| 53 | static const char *DbgTimerName = "DWARF Debug Writer"; |
| 54 | static const char *EHTimerName = "DWARF Exception Writer"; |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 55 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 56 | STATISTIC(EmittedInsts, "Number of machine instrs printed"); |
| 57 | |
Devang Patel | 1997473 | 2007-05-03 01:11:54 +0000 | [diff] [blame] | 58 | char AsmPrinter::ID = 0; |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 59 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 60 | typedef DenseMap<GCStrategy*,GCMetadataPrinter*> gcp_map_type; |
| 61 | static gcp_map_type &getGCMap(void *&P) { |
| 62 | if (P == 0) |
| 63 | P = new gcp_map_type(); |
| 64 | return *(gcp_map_type*)P; |
| 65 | } |
| 66 | |
| 67 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 68 | /// getGVAlignmentLog2 - Return the alignment to use for the specified global |
| 69 | /// value in log2 form. This rounds up to the preferred alignment if possible |
| 70 | /// and legal. |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 71 | static unsigned getGVAlignmentLog2(const GlobalValue *GV, const DataLayout &TD, |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 72 | unsigned InBits = 0) { |
| 73 | unsigned NumBits = 0; |
| 74 | if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) |
| 75 | NumBits = TD.getPreferredAlignmentLog(GVar); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 76 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 77 | // If InBits is specified, round it to it. |
| 78 | if (InBits > NumBits) |
| 79 | NumBits = InBits; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 80 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 81 | // If the GV has a specified alignment, take it into account. |
| 82 | if (GV->getAlignment() == 0) |
| 83 | return NumBits; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 84 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 85 | unsigned GVAlign = Log2_32(GV->getAlignment()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 86 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 87 | // If the GVAlign is larger than NumBits, or if we are required to obey |
| 88 | // NumBits because the GV has an assigned section, obey it. |
| 89 | if (GVAlign > NumBits || GV->hasSection()) |
| 90 | NumBits = GVAlign; |
| 91 | return NumBits; |
| 92 | } |
| 93 | |
Chris Lattner | b23569a | 2010-04-04 08:18:47 +0000 | [diff] [blame] | 94 | AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer) |
Owen Anderson | 90c579d | 2010-08-06 18:33:48 +0000 | [diff] [blame] | 95 | : MachineFunctionPass(ID), |
Chris Lattner | 9d1c1ad | 2010-04-04 18:06:11 +0000 | [diff] [blame] | 96 | TM(tm), MAI(tm.getMCAsmInfo()), |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 97 | OutContext(Streamer.getContext()), |
| 98 | OutStreamer(Streamer), |
Devang Patel | 553881b | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 99 | LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) { |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 100 | DD = 0; DE = 0; MMI = 0; LI = 0; |
Hal Finkel | d55a266 | 2012-02-22 21:11:47 +0000 | [diff] [blame] | 101 | CurrentFnSym = CurrentFnSymForSize = 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 102 | GCMetadataPrinters = 0; |
Chris Lattner | 56591ab | 2010-02-02 23:37:42 +0000 | [diff] [blame] | 103 | VerboseAsm = Streamer.isVerboseAsm(); |
Evan Cheng | 42bf74b | 2009-03-25 01:47:28 +0000 | [diff] [blame] | 104 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 105 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 106 | AsmPrinter::~AsmPrinter() { |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 107 | assert(DD == 0 && DE == 0 && "Debug/EH info didn't get finalized"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 108 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 109 | if (GCMetadataPrinters != 0) { |
| 110 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 111 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 112 | for (gcp_map_type::iterator I = GCMap.begin(), E = GCMap.end(); I != E; ++I) |
| 113 | delete I->second; |
| 114 | delete &GCMap; |
| 115 | GCMetadataPrinters = 0; |
| 116 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 117 | |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 118 | delete &OutStreamer; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 119 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 120 | |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 121 | /// getFunctionNumber - Return a unique ID for the current function. |
| 122 | /// |
| 123 | unsigned AsmPrinter::getFunctionNumber() const { |
| 124 | return MF->getFunctionNumber(); |
| 125 | } |
| 126 | |
Dan Gohman | 0d805c3 | 2010-04-17 16:44:48 +0000 | [diff] [blame] | 127 | const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const { |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 128 | return TM.getTargetLowering()->getObjFileLowering(); |
| 129 | } |
| 130 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 131 | /// getDataLayout - Return information about data layout. |
| 132 | const DataLayout &AsmPrinter::getDataLayout() const { |
| 133 | return *TM.getDataLayout(); |
Chris Lattner | d38fee8 | 2010-04-05 00:13:49 +0000 | [diff] [blame] | 134 | } |
| 135 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 136 | /// getCurrentSection() - Return the current section we are emitting to. |
| 137 | const MCSection *AsmPrinter::getCurrentSection() const { |
Peter Collingbourne | df39be6 | 2013-04-17 21:18:16 +0000 | [diff] [blame] | 138 | return OutStreamer.getCurrentSection().first; |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 139 | } |
| 140 | |
| 141 | |
Chris Lattner | d38fee8 | 2010-04-05 00:13:49 +0000 | [diff] [blame] | 142 | |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 143 | void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const { |
Dan Gohman | 845012e | 2009-07-31 23:37:33 +0000 | [diff] [blame] | 144 | AU.setPreservesAll(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 145 | MachineFunctionPass::getAnalysisUsage(AU); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 146 | AU.addRequired<MachineModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 147 | AU.addRequired<GCModuleInfo>(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 148 | if (isVerbose()) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 149 | AU.addRequired<MachineLoopInfo>(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 150 | } |
| 151 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 152 | bool AsmPrinter::doInitialization(Module &M) { |
Lang Hames | 07f6a4f | 2012-12-10 22:49:11 +0000 | [diff] [blame] | 153 | OutStreamer.InitStreamer(); |
| 154 | |
Chris Lattner | d32c8a5 | 2010-04-04 05:09:10 +0000 | [diff] [blame] | 155 | MMI = getAnalysisIfAvailable<MachineModuleInfo>(); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 156 | MMI->AnalyzeModule(M); |
| 157 | |
Chris Lattner | f26e03b | 2009-07-31 17:42:42 +0000 | [diff] [blame] | 158 | // Initialize TargetLoweringObjectFile. |
| 159 | const_cast<TargetLoweringObjectFile&>(getObjFileLowering()) |
| 160 | .Initialize(OutContext, TM); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 161 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 162 | Mang = new Mangler(OutContext, *TM.getDataLayout()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 163 | |
Bob Wilson | 812209a | 2009-09-30 22:06:26 +0000 | [diff] [blame] | 164 | // Allow the target to emit any magic that it wants at the start of the file. |
| 165 | EmitStartOfAsmFile(M); |
Rafael Espindola | 952b839 | 2008-12-03 11:01:37 +0000 | [diff] [blame] | 166 | |
Chris Lattner | a6594fc | 2010-01-25 18:58:59 +0000 | [diff] [blame] | 167 | // Very minimal debug info. It is ignored if we emit actual debug info. If we |
| 168 | // don't, this at least helps the user find where a global came from. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 169 | if (MAI->hasSingleParameterDotFile()) { |
Chris Lattner | a6594fc | 2010-01-25 18:58:59 +0000 | [diff] [blame] | 170 | // .file "foo.c" |
| 171 | OutStreamer.EmitFileDirective(M.getModuleIdentifier()); |
Rafael Espindola | 952b839 | 2008-12-03 11:01:37 +0000 | [diff] [blame] | 172 | } |
| 173 | |
Bob Wilson | 812209a | 2009-09-30 22:06:26 +0000 | [diff] [blame] | 174 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
| 175 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 176 | for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I) |
| 177 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 178 | MP->beginAssembly(*this); |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 179 | |
| 180 | // Emit module-level inline asm if it exists. |
Chris Lattner | 47b7e5d | 2010-04-03 21:13:18 +0000 | [diff] [blame] | 181 | if (!M.getModuleInlineAsm().empty()) { |
| 182 | OutStreamer.AddComment("Start of file scope inline assembly"); |
| 183 | OutStreamer.AddBlankLine(); |
Chris Lattner | a38941d | 2010-11-17 07:53:40 +0000 | [diff] [blame] | 184 | EmitInlineAsm(M.getModuleInlineAsm()+"\n"); |
Chris Lattner | 47b7e5d | 2010-04-03 21:13:18 +0000 | [diff] [blame] | 185 | OutStreamer.AddComment("End of file scope inline assembly"); |
| 186 | OutStreamer.AddBlankLine(); |
| 187 | } |
Chris Lattner | 2c1b159 | 2006-01-23 23:47:53 +0000 | [diff] [blame] | 188 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 189 | if (MAI->doesSupportDebugInformation()) |
| 190 | DD = new DwarfDebug(this, &M); |
Anton Korobeynikov | d7e8ddc | 2011-01-14 21:57:45 +0000 | [diff] [blame] | 191 | |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 192 | switch (MAI->getExceptionHandlingType()) { |
| 193 | case ExceptionHandling::None: |
| 194 | return false; |
| 195 | case ExceptionHandling::SjLj: |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 196 | case ExceptionHandling::DwarfCFI: |
| 197 | DE = new DwarfCFIException(this); |
| 198 | return false; |
| 199 | case ExceptionHandling::ARM: |
| 200 | DE = new ARMException(this); |
| 201 | return false; |
Charles Davis | d652b13 | 2011-05-27 23:47:32 +0000 | [diff] [blame] | 202 | case ExceptionHandling::Win64: |
| 203 | DE = new Win64Exception(this); |
| 204 | return false; |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 205 | } |
Devang Patel | 14a55d9 | 2009-06-19 21:54:26 +0000 | [diff] [blame] | 206 | |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 207 | llvm_unreachable("Unknown exception type."); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 208 | } |
| 209 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 210 | void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 211 | switch ((GlobalValue::LinkageTypes)Linkage) { |
| 212 | case GlobalValue::CommonLinkage: |
| 213 | case GlobalValue::LinkOnceAnyLinkage: |
| 214 | case GlobalValue::LinkOnceODRLinkage: |
Bill Wendling | 32811be | 2012-08-17 18:33:14 +0000 | [diff] [blame] | 215 | case GlobalValue::LinkOnceODRAutoHideLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 216 | case GlobalValue::WeakAnyLinkage: |
| 217 | case GlobalValue::WeakODRLinkage: |
Bill Wendling | 5e721d7 | 2010-07-01 21:55:59 +0000 | [diff] [blame] | 218 | case GlobalValue::LinkerPrivateWeakLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 219 | if (MAI->getWeakDefDirective() != 0) { |
| 220 | // .globl _foo |
| 221 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Bill Wendling | 55ae515 | 2010-08-20 22:05:50 +0000 | [diff] [blame] | 222 | |
| 223 | if ((GlobalValue::LinkageTypes)Linkage != |
Bill Wendling | 32811be | 2012-08-17 18:33:14 +0000 | [diff] [blame] | 224 | GlobalValue::LinkOnceODRAutoHideLinkage) |
Bill Wendling | 55ae515 | 2010-08-20 22:05:50 +0000 | [diff] [blame] | 225 | // .weak_definition _foo |
| 226 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition); |
| 227 | else |
| 228 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate); |
Duncan Sands | 5b1b3b7 | 2010-05-12 07:11:33 +0000 | [diff] [blame] | 229 | } else if (MAI->getLinkOnceDirective() != 0) { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 230 | // .globl _foo |
| 231 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Duncan Sands | 5b1b3b7 | 2010-05-12 07:11:33 +0000 | [diff] [blame] | 232 | //NOTE: linkonce is handled by the section the symbol was assigned to. |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 233 | } else { |
| 234 | // .weak _foo |
| 235 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak); |
| 236 | } |
| 237 | break; |
| 238 | case GlobalValue::DLLExportLinkage: |
| 239 | case GlobalValue::AppendingLinkage: |
| 240 | // FIXME: appending linkage variables should go into a section of |
| 241 | // their name or something. For now, just emit them as external. |
| 242 | case GlobalValue::ExternalLinkage: |
| 243 | // If external or appending, declare as a global symbol. |
| 244 | // .globl _foo |
| 245 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 246 | break; |
| 247 | case GlobalValue::PrivateLinkage: |
| 248 | case GlobalValue::InternalLinkage: |
Bill Wendling | eabd735 | 2010-07-01 22:38:24 +0000 | [diff] [blame] | 249 | case GlobalValue::LinkerPrivateLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 250 | break; |
| 251 | default: |
| 252 | llvm_unreachable("Unknown linkage type!"); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 257 | /// EmitGlobalVariable - Emit the specified global variable to the .s file. |
| 258 | void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 259 | if (GV->hasInitializer()) { |
| 260 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 261 | if (EmitSpecialLLVMGlobal(GV)) |
| 262 | return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 263 | |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 264 | if (isVerbose()) { |
| 265 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 266 | /*PrintType=*/false, GV->getParent()); |
| 267 | OutStreamer.GetCommentOS() << '\n'; |
| 268 | } |
Eric Christopher | 04386ca | 2010-05-25 21:49:43 +0000 | [diff] [blame] | 269 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 270 | |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 271 | MCSymbol *GVSym = Mang->getSymbol(GV); |
Chad Rosier | 348d542 | 2011-06-10 00:53:15 +0000 | [diff] [blame] | 272 | EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration()); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 273 | |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 274 | if (!GV->hasInitializer()) // External globals require no extra code. |
| 275 | return; |
| 276 | |
Chris Lattner | a800f7c | 2010-01-25 18:33:40 +0000 | [diff] [blame] | 277 | if (MAI->hasDotTypeDotSizeDirective()) |
| 278 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 279 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 280 | SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); |
| 281 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 282 | const DataLayout *TD = TM.getDataLayout(); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 283 | uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 284 | |
Chris Lattner | 567dd1f | 2010-04-26 18:46:46 +0000 | [diff] [blame] | 285 | // If the alignment is specified, we *must* obey it. Overaligning a global |
| 286 | // with a specified alignment is a prompt way to break globals emitted to |
| 287 | // sections and expected to be contiguous (e.g. ObjC metadata). |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 288 | unsigned AlignLog = getGVAlignmentLog2(GV, *TD); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 289 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 290 | // Handle common and BSS local symbols (.lcomm). |
| 291 | if (GVKind.isCommon() || GVKind.isBSSLocal()) { |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 292 | if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 293 | unsigned Align = 1 << AlignLog; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 294 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 295 | // Handle common symbols. |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 296 | if (GVKind.isCommon()) { |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 297 | if (!getObjFileLowering().getCommDirectiveSupportsAlignment()) |
| 298 | Align = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 299 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 300 | // .comm _foo, 42, 4 |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 301 | OutStreamer.EmitCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 302 | return; |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 303 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 304 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 305 | // Handle local BSS symbols. |
| 306 | if (MAI->hasMachoZeroFillDirective()) { |
| 307 | const MCSection *TheSection = |
| 308 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 309 | // .zerofill __DATA, __bss, _foo, 400, 5 |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 310 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 311 | return; |
| 312 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 313 | |
Ulrich Weigand | dba37a3 | 2012-11-27 16:11:16 +0000 | [diff] [blame] | 314 | // Use .lcomm only if it supports user-specified alignment. |
| 315 | // Otherwise, while it would still be correct to use .lcomm in some |
| 316 | // cases (e.g. when Align == 1), the external assembler might enfore |
| 317 | // some -unknown- default alignment behavior, which could cause |
| 318 | // spurious differences between external and integrated assembler. |
| 319 | // Prefer to simply fall back to .local / .comm in this case. |
| 320 | if (MAI->getLCOMMDirectiveAlignmentType() != LCOMM::NoAlignment) { |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 321 | // .lcomm _foo, 42 |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 322 | OutStreamer.EmitLocalCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 323 | return; |
| 324 | } |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 325 | |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 326 | if (!getObjFileLowering().getCommDirectiveSupportsAlignment()) |
| 327 | Align = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 328 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 329 | // .local _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 330 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 331 | // .comm _foo, 42, 4 |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 332 | OutStreamer.EmitCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 333 | return; |
| 334 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 335 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 336 | const MCSection *TheSection = |
| 337 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 338 | |
| 339 | // Handle the zerofill directive on darwin, which is a special form of BSS |
| 340 | // emission. |
| 341 | if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) { |
Chris Lattner | 4c4d0c0 | 2010-04-27 07:41:44 +0000 | [diff] [blame] | 342 | if (Size == 0) Size = 1; // zerofill of 0 bytes is undefined. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 343 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 344 | // .globl _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 345 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 346 | // .zerofill __DATA, __common, _foo, 400, 5 |
| 347 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 348 | return; |
| 349 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 350 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 351 | // Handle thread local data for mach-o which requires us to output an |
| 352 | // additional structure of data and mangle the original symbol so that we |
| 353 | // can reference it later. |
Chris Lattner | dfe254b | 2010-09-05 20:33:40 +0000 | [diff] [blame] | 354 | // |
| 355 | // TODO: This should become an "emit thread local global" method on TLOF. |
| 356 | // All of this macho specific stuff should be sunk down into TLOFMachO and |
| 357 | // stuff like "TLSExtraDataSection" should no longer be part of the parent |
| 358 | // TLOF class. This will also make it more obvious that stuff like |
| 359 | // MCStreamer::EmitTBSSSymbol is macho specific and only called from macho |
| 360 | // specific code. |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 361 | if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) { |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 362 | // Emit the .tbss symbol |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 363 | MCSymbol *MangSym = |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 364 | OutContext.GetOrCreateSymbol(GVSym->getName() + Twine("$tlv$init")); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 365 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 366 | if (GVKind.isThreadBSS()) |
| 367 | OutStreamer.EmitTBSSSymbol(TheSection, MangSym, Size, 1 << AlignLog); |
| 368 | else if (GVKind.isThreadData()) { |
| 369 | OutStreamer.SwitchSection(TheSection); |
| 370 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 371 | EmitAlignment(AlignLog, GV); |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 372 | OutStreamer.EmitLabel(MangSym); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 373 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 374 | EmitGlobalConstant(GV->getInitializer()); |
| 375 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 376 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 377 | OutStreamer.AddBlankLine(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 378 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 379 | // Emit the variable struct for the runtime. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 380 | const MCSection *TLVSect |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 381 | = getObjFileLowering().getTLSExtraDataSection(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 382 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 383 | OutStreamer.SwitchSection(TLVSect); |
| 384 | // Emit the linkage here. |
| 385 | EmitLinkage(GV->getLinkage(), GVSym); |
| 386 | OutStreamer.EmitLabel(GVSym); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 387 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 388 | // Three pointers in size: |
| 389 | // - __tlv_bootstrap - used to make sure support exists |
| 390 | // - spare pointer, used when mapped by the runtime |
| 391 | // - pointer to mangled symbol above with initializer |
Chandler Carruth | 426c2bf | 2012-11-01 09:14:31 +0000 | [diff] [blame] | 392 | unsigned PtrSize = TD->getPointerSizeInBits()/8; |
Eric Christopher | 7310064 | 2010-06-03 04:02:59 +0000 | [diff] [blame] | 393 | OutStreamer.EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"), |
Eric Christopher | 68ca562 | 2013-01-09 01:57:54 +0000 | [diff] [blame] | 394 | PtrSize); |
| 395 | OutStreamer.EmitIntValue(0, PtrSize); |
| 396 | OutStreamer.EmitSymbolValue(MangSym, PtrSize); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 397 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 398 | OutStreamer.AddBlankLine(); |
Eric Christopher | c1a887d | 2010-05-20 00:49:07 +0000 | [diff] [blame] | 399 | return; |
| 400 | } |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 401 | |
| 402 | OutStreamer.SwitchSection(TheSection); |
| 403 | |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 404 | EmitLinkage(GV->getLinkage(), GVSym); |
Chris Lattner | f74e25f | 2010-04-26 18:30:45 +0000 | [diff] [blame] | 405 | EmitAlignment(AlignLog, GV); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 406 | |
Chris Lattner | 4c8c668 | 2010-01-19 06:41:24 +0000 | [diff] [blame] | 407 | OutStreamer.EmitLabel(GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 408 | |
| 409 | EmitGlobalConstant(GV->getInitializer()); |
| 410 | |
| 411 | if (MAI->hasDotTypeDotSizeDirective()) |
Chris Lattner | 1947f24 | 2010-01-25 07:53:05 +0000 | [diff] [blame] | 412 | // .size foo, 42 |
Chris Lattner | 99328ad | 2010-01-25 07:52:13 +0000 | [diff] [blame] | 413 | OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext)); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 414 | |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 415 | OutStreamer.AddBlankLine(); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 416 | } |
| 417 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 418 | /// EmitFunctionHeader - This method emits the header for the current |
| 419 | /// function. |
| 420 | void AsmPrinter::EmitFunctionHeader() { |
| 421 | // Print out constants referenced by the function |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 422 | EmitConstantPool(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 423 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 424 | // Print the 'header' of function. |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 425 | const Function *F = MF->getFunction(); |
| 426 | |
| 427 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM)); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 428 | EmitVisibility(CurrentFnSym, F->getVisibility()); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 429 | |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 430 | EmitLinkage(F->getLinkage(), CurrentFnSym); |
Chris Lattner | b406a81 | 2010-01-26 23:41:48 +0000 | [diff] [blame] | 431 | EmitAlignment(MF->getAlignment(), F); |
| 432 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 433 | if (MAI->hasDotTypeDotSizeDirective()) |
| 434 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction); |
| 435 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 436 | if (isVerbose()) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 437 | WriteAsOperand(OutStreamer.GetCommentOS(), F, |
| 438 | /*PrintType=*/false, F->getParent()); |
| 439 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 440 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 441 | |
Dan Gohman | f451cb8 | 2010-02-10 16:03:48 +0000 | [diff] [blame] | 442 | // Emit the CurrentFnSym. This is a virtual function to allow targets to |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 443 | // do their wild and crazy things as required. |
| 444 | EmitFunctionEntryLabel(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 445 | |
Chris Lattner | 9cc0da9 | 2010-03-15 20:39:00 +0000 | [diff] [blame] | 446 | // If the function had address-taken blocks that got deleted, then we have |
| 447 | // references to the dangling symbols. Emit them at the start of the function |
| 448 | // so that we don't get references to undefined symbols. |
| 449 | std::vector<MCSymbol*> DeadBlockSyms; |
| 450 | MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms); |
| 451 | for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) { |
| 452 | OutStreamer.AddComment("Address taken block that was later removed"); |
| 453 | OutStreamer.EmitLabel(DeadBlockSyms[i]); |
| 454 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 455 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 456 | // Add some workaround for linkonce linkage on Cygwin\MinGW. |
| 457 | if (MAI->getLinkOnceDirective() != 0 && |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 458 | (F->hasLinkOnceLinkage() || F->hasWeakLinkage())) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 459 | // FIXME: What is this? |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 460 | MCSymbol *FakeStub = |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 461 | OutContext.GetOrCreateSymbol(Twine("Lllvm$workaround$fake$stub$")+ |
| 462 | CurrentFnSym->getName()); |
| 463 | OutStreamer.EmitLabel(FakeStub); |
| 464 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 465 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 466 | // Emit pre-function debug and/or EH information. |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 467 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 468 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 469 | DE->BeginFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 470 | } |
| 471 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 472 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 473 | DD->beginFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 474 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 475 | } |
| 476 | |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 477 | /// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the |
| 478 | /// function. This can be overridden by targets as required to do custom stuff. |
| 479 | void AsmPrinter::EmitFunctionEntryLabel() { |
Chris Lattner | b4202db | 2010-05-06 00:05:37 +0000 | [diff] [blame] | 480 | // The function label could have already been emitted if two symbols end up |
| 481 | // conflicting due to asm renaming. Detect this and emit an error. |
Jim Grosbach | 3e96531 | 2012-05-18 19:12:01 +0000 | [diff] [blame] | 482 | if (CurrentFnSym->isUndefined()) |
Chris Lattner | b4202db | 2010-05-06 00:05:37 +0000 | [diff] [blame] | 483 | return OutStreamer.EmitLabel(CurrentFnSym); |
| 484 | |
| 485 | report_fatal_error("'" + Twine(CurrentFnSym->getName()) + |
| 486 | "' label emitted multiple times to assembly file"); |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 487 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 488 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 489 | /// emitComments - Pretty-print comments for instructions. |
| 490 | static void emitComments(const MachineInstr &MI, raw_ostream &CommentOS) { |
Devang Patel | e025e96 | 2010-06-29 22:29:15 +0000 | [diff] [blame] | 491 | const MachineFunction *MF = MI.getParent()->getParent(); |
| 492 | const TargetMachine &TM = MF->getTarget(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 493 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 494 | // Check for spills and reloads |
| 495 | int FI; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 496 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 497 | const MachineFrameInfo *FrameInfo = MF->getFrameInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 498 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 499 | // We assume a single instruction only has a spill or reload, not |
| 500 | // both. |
| 501 | const MachineMemOperand *MMO; |
| 502 | if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) { |
| 503 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 504 | MMO = *MI.memoperands_begin(); |
| 505 | CommentOS << MMO->getSize() << "-byte Reload\n"; |
| 506 | } |
| 507 | } else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) { |
| 508 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 509 | CommentOS << MMO->getSize() << "-byte Folded Reload\n"; |
| 510 | } else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) { |
| 511 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 512 | MMO = *MI.memoperands_begin(); |
| 513 | CommentOS << MMO->getSize() << "-byte Spill\n"; |
| 514 | } |
| 515 | } else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) { |
| 516 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 517 | CommentOS << MMO->getSize() << "-byte Folded Spill\n"; |
| 518 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 519 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 520 | // Check for spill-induced copies |
Jakob Stoklund Olesen | 04c528a | 2010-07-16 04:45:42 +0000 | [diff] [blame] | 521 | if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse)) |
| 522 | CommentOS << " Reload Reuse\n"; |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 523 | } |
| 524 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 525 | /// emitImplicitDef - This method emits the specified machine instruction |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 526 | /// that is an implicit def. |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 527 | static void emitImplicitDef(const MachineInstr *MI, AsmPrinter &AP) { |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 528 | unsigned RegNo = MI->getOperand(0).getReg(); |
| 529 | AP.OutStreamer.AddComment(Twine("implicit-def: ") + |
| 530 | AP.TM.getRegisterInfo()->getName(RegNo)); |
| 531 | AP.OutStreamer.AddBlankLine(); |
| 532 | } |
| 533 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 534 | static void emitKill(const MachineInstr *MI, AsmPrinter &AP) { |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 535 | std::string Str = "kill:"; |
| 536 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 537 | const MachineOperand &Op = MI->getOperand(i); |
| 538 | assert(Op.isReg() && "KILL instruction must have only register operands"); |
| 539 | Str += ' '; |
| 540 | Str += AP.TM.getRegisterInfo()->getName(Op.getReg()); |
| 541 | Str += (Op.isDef() ? "<def>" : "<kill>"); |
| 542 | } |
| 543 | AP.OutStreamer.AddComment(Str); |
| 544 | AP.OutStreamer.AddBlankLine(); |
| 545 | } |
| 546 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 547 | /// emitDebugValueComment - This method handles the target-independent form |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 548 | /// of DBG_VALUE, returning true if it was able to do so. A false return |
| 549 | /// means the target will need to handle MI in EmitInstruction. |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 550 | static bool emitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) { |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 551 | // This code handles only the 3-operand target-independent form. |
| 552 | if (MI->getNumOperands() != 3) |
| 553 | return false; |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 554 | |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 555 | SmallString<128> Str; |
| 556 | raw_svector_ostream OS(Str); |
| 557 | OS << '\t' << AP.MAI->getCommentString() << "DEBUG_VALUE: "; |
| 558 | |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 559 | // cast away const; DIetc do not take const operands for some reason. |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 560 | DIVariable V(const_cast<MDNode*>(MI->getOperand(2).getMetadata())); |
Devang Patel | 67a444c | 2010-04-29 18:52:10 +0000 | [diff] [blame] | 561 | if (V.getContext().isSubprogram()) |
Devang Patel | 2db49d7 | 2010-05-07 18:11:54 +0000 | [diff] [blame] | 562 | OS << DISubprogram(V.getContext()).getDisplayName() << ":"; |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 563 | OS << V.getName() << " <- "; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 564 | |
| 565 | // Register or immediate value. Register 0 means undef. |
| 566 | if (MI->getOperand(0).isFPImm()) { |
| 567 | APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF()); |
| 568 | if (MI->getOperand(0).getFPImm()->getType()->isFloatTy()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 569 | OS << (double)APF.convertToFloat(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 570 | } else if (MI->getOperand(0).getFPImm()->getType()->isDoubleTy()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 571 | OS << APF.convertToDouble(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 572 | } else { |
| 573 | // There is no good way to print long double. Convert a copy to |
| 574 | // double. Ah well, it's only a comment. |
| 575 | bool ignored; |
| 576 | APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 577 | &ignored); |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 578 | OS << "(long double) " << APF.convertToDouble(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 579 | } |
| 580 | } else if (MI->getOperand(0).isImm()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 581 | OS << MI->getOperand(0).getImm(); |
Devang Patel | 8594d42 | 2011-06-24 20:46:11 +0000 | [diff] [blame] | 582 | } else if (MI->getOperand(0).isCImm()) { |
| 583 | MI->getOperand(0).getCImm()->getValue().print(OS, false /*isSigned*/); |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 584 | } else { |
| 585 | assert(MI->getOperand(0).isReg() && "Unknown operand type"); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 586 | if (MI->getOperand(0).getReg() == 0) { |
| 587 | // Suppress offset, it is not meaningful here. |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 588 | OS << "undef"; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 589 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 590 | AP.OutStreamer.EmitRawText(OS.str()); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 591 | return true; |
| 592 | } |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 593 | OS << AP.TM.getRegisterInfo()->getName(MI->getOperand(0).getReg()); |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 594 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 595 | |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 596 | OS << '+' << MI->getOperand(1).getImm(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 597 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 598 | AP.OutStreamer.EmitRawText(OS.str()); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 599 | return true; |
| 600 | } |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 601 | |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 602 | AsmPrinter::CFIMoveType AsmPrinter::needsCFIMoves() { |
Rafael Espindola | fc2bb8c | 2011-05-25 03:44:17 +0000 | [diff] [blame] | 603 | if (MAI->getExceptionHandlingType() == ExceptionHandling::DwarfCFI && |
| 604 | MF->getFunction()->needsUnwindTableEntry()) |
| 605 | return CFI_M_EH; |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 606 | |
Rafael Espindola | f2b0423 | 2011-05-06 14:56:22 +0000 | [diff] [blame] | 607 | if (MMI->hasDebugInfo()) |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 608 | return CFI_M_Debug; |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 609 | |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 610 | return CFI_M_None; |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 611 | } |
| 612 | |
Charles Davis | f463370 | 2011-05-28 04:21:04 +0000 | [diff] [blame] | 613 | bool AsmPrinter::needsSEHMoves() { |
| 614 | return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 && |
| 615 | MF->getFunction()->needsUnwindTableEntry(); |
| 616 | } |
| 617 | |
Nick Lewycky | 390c40d | 2011-10-27 06:44:11 +0000 | [diff] [blame] | 618 | bool AsmPrinter::needsRelocationsForDwarfStringPool() const { |
Rafael Espindola | 9cfc799 | 2012-06-22 13:32:49 +0000 | [diff] [blame] | 619 | return MAI->doesDwarfUseRelocationsAcrossSections(); |
Nick Lewycky | 390c40d | 2011-10-27 06:44:11 +0000 | [diff] [blame] | 620 | } |
| 621 | |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 622 | void AsmPrinter::emitPrologLabel(const MachineInstr &MI) { |
| 623 | MCSymbol *Label = MI.getOperand(0).getMCSymbol(); |
Rafael Espindola | fea8fea | 2011-04-26 19:26:53 +0000 | [diff] [blame] | 624 | |
Rafael Espindola | f2b0423 | 2011-05-06 14:56:22 +0000 | [diff] [blame] | 625 | if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI) |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 626 | return; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 627 | |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 628 | if (needsCFIMoves() == CFI_M_None) |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 629 | return; |
| 630 | |
Bill Wendling | e060a5c | 2011-07-19 00:02:51 +0000 | [diff] [blame] | 631 | if (MMI->getCompactUnwindEncoding() != 0) |
| 632 | OutStreamer.EmitCompactUnwindEncoding(MMI->getCompactUnwindEncoding()); |
| 633 | |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 634 | MachineModuleInfo &MMI = MF->getMMI(); |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 635 | std::vector<MachineMove> &Moves = MMI.getFrameMoves(); |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 636 | bool FoundOne = false; |
| 637 | (void)FoundOne; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 638 | for (std::vector<MachineMove>::iterator I = Moves.begin(), |
| 639 | E = Moves.end(); I != E; ++I) { |
| 640 | if (I->getLabel() == Label) { |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 641 | EmitCFIFrameMove(*I); |
| 642 | FoundOne = true; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 643 | } |
| 644 | } |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 645 | assert(FoundOne); |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 646 | } |
| 647 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 648 | /// EmitFunctionBody - This method emits the body and trailer for a |
| 649 | /// function. |
| 650 | void AsmPrinter::EmitFunctionBody() { |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 651 | // Emit target-specific gunk before the function body. |
| 652 | EmitFunctionBodyStart(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 653 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 654 | bool ShouldPrintDebugScopes = DD && MMI->hasDebugInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 655 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 656 | // Print out code for the function. |
| 657 | bool HasAnyRealCode = false; |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 658 | const MachineInstr *LastMI = 0; |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 659 | for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); |
| 660 | I != E; ++I) { |
| 661 | // Print a label for the basic block. |
| 662 | EmitBasicBlockStart(I); |
| 663 | for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); |
| 664 | II != IE; ++II) { |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 665 | LastMI = II; |
| 666 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 667 | // Print the assembly for the instruction. |
Dale Johannesen | d014761 | 2010-05-01 16:41:11 +0000 | [diff] [blame] | 668 | if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() && |
| 669 | !II->isDebugValue()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 670 | HasAnyRealCode = true; |
Evan Cheng | ed33b13 | 2010-04-27 19:38:45 +0000 | [diff] [blame] | 671 | ++EmittedInsts; |
| 672 | } |
| 673 | |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 674 | if (ShouldPrintDebugScopes) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 675 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Devang Patel | cbbe287 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 676 | DD->beginInstruction(II); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 677 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 678 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 679 | if (isVerbose()) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 680 | emitComments(*II, OutStreamer.GetCommentOS()); |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 681 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 682 | switch (II->getOpcode()) { |
Bill Wendling | 7431bea | 2010-07-16 22:20:36 +0000 | [diff] [blame] | 683 | case TargetOpcode::PROLOG_LABEL: |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 684 | emitPrologLabel(*II); |
| 685 | break; |
| 686 | |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 687 | case TargetOpcode::EH_LABEL: |
| 688 | case TargetOpcode::GC_LABEL: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 689 | OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol()); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 690 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 691 | case TargetOpcode::INLINEASM: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 692 | EmitInlineAsm(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 693 | break; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 694 | case TargetOpcode::DBG_VALUE: |
| 695 | if (isVerbose()) { |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 696 | if (!emitDebugValueComment(II, *this)) |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 697 | EmitInstruction(II); |
| 698 | } |
| 699 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 700 | case TargetOpcode::IMPLICIT_DEF: |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 701 | if (isVerbose()) emitImplicitDef(II, *this); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 702 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 703 | case TargetOpcode::KILL: |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 704 | if (isVerbose()) emitKill(II, *this); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 705 | break; |
| 706 | default: |
Devang Patel | 49a3ff9 | 2011-04-29 18:00:54 +0000 | [diff] [blame] | 707 | if (!TM.hasMCUseLoc()) |
| 708 | MCLineEntry::Make(&OutStreamer, getCurrentSection()); |
| 709 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 710 | EmitInstruction(II); |
| 711 | break; |
| 712 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 713 | |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 714 | if (ShouldPrintDebugScopes) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 715 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Devang Patel | cbbe287 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 716 | DD->endInstruction(II); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 717 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 718 | } |
| 719 | } |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 720 | |
| 721 | // If the last instruction was a prolog label, then we have a situation where |
| 722 | // we emitted a prolog but no function body. This results in the ending prolog |
| 723 | // label equaling the end of function label and an invalid "row" in the |
| 724 | // FDE. We need to emit a noop in this situation so that the FDE's rows are |
| 725 | // valid. |
Bill Wendling | 7490896 | 2010-07-17 19:18:44 +0000 | [diff] [blame] | 726 | bool RequiresNoop = LastMI && LastMI->isPrologLabel(); |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 727 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 728 | // If the function is empty and the object file uses .subsections_via_symbols, |
Chris Lattner | d49fe1b | 2010-01-28 01:28:58 +0000 | [diff] [blame] | 729 | // then we need to emit *something* to the function body to prevent the |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 730 | // labels from collapsing together. Just emit a noop. |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 731 | if ((MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) || RequiresNoop) { |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 732 | MCInst Noop; |
| 733 | TM.getInstrInfo()->getNoopForMachoTarget(Noop); |
Chris Lattner | d61647d | 2010-04-26 23:41:43 +0000 | [diff] [blame] | 734 | if (Noop.getOpcode()) { |
| 735 | OutStreamer.AddComment("avoids zero-length function"); |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 736 | OutStreamer.EmitInstruction(Noop); |
Chris Lattner | d61647d | 2010-04-26 23:41:43 +0000 | [diff] [blame] | 737 | } else // Target not mc-ized yet. |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 738 | OutStreamer.EmitRawText(StringRef("\tnop\n")); |
| 739 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 740 | |
Rafael Espindola | 6c5b2dc | 2011-11-15 19:08:46 +0000 | [diff] [blame] | 741 | const Function *F = MF->getFunction(); |
| 742 | for (Function::const_iterator i = F->begin(), e = F->end(); i != e; ++i) { |
| 743 | const BasicBlock *BB = i; |
| 744 | if (!BB->hasAddressTaken()) |
| 745 | continue; |
| 746 | MCSymbol *Sym = GetBlockAddressSymbol(BB); |
| 747 | if (Sym->isDefined()) |
| 748 | continue; |
| 749 | OutStreamer.AddComment("Address of block that was removed by CodeGen"); |
| 750 | OutStreamer.EmitLabel(Sym); |
| 751 | } |
| 752 | |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 753 | // Emit target-specific gunk after the function body. |
| 754 | EmitFunctionBodyEnd(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 755 | |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 756 | // If the target wants a .size directive for the size of the function, emit |
| 757 | // it. |
| 758 | if (MAI->hasDotTypeDotSizeDirective()) { |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 759 | // Create a symbol for the end of function, so we can get the size as |
| 760 | // difference between the function label and the temp label. |
| 761 | MCSymbol *FnEndLabel = OutContext.CreateTempSymbol(); |
| 762 | OutStreamer.EmitLabel(FnEndLabel); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 763 | |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 764 | const MCExpr *SizeExp = |
| 765 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext), |
Hal Finkel | d55a266 | 2012-02-22 21:11:47 +0000 | [diff] [blame] | 766 | MCSymbolRefExpr::Create(CurrentFnSymForSize, |
| 767 | OutContext), |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 768 | OutContext); |
| 769 | OutStreamer.EmitELFSize(CurrentFnSym, SizeExp); |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 770 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 771 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 772 | // Emit post-function debug information. |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 773 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 774 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 775 | DD->endFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 776 | } |
| 777 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 778 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 779 | DE->EndFunction(); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 780 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 781 | MMI->EndFunction(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 782 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 783 | // Print out jump tables referenced by the function. |
| 784 | EmitJumpTableInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 785 | |
Chris Lattner | d26a80f | 2010-02-03 01:49:49 +0000 | [diff] [blame] | 786 | OutStreamer.AddBlankLine(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 787 | } |
| 788 | |
Devang Patel | 28ff35d | 2010-04-28 01:39:28 +0000 | [diff] [blame] | 789 | /// getDebugValueLocation - Get location information encoded by DBG_VALUE |
| 790 | /// operands. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 791 | MachineLocation AsmPrinter:: |
| 792 | getDebugValueLocation(const MachineInstr *MI) const { |
Devang Patel | 28ff35d | 2010-04-28 01:39:28 +0000 | [diff] [blame] | 793 | // Target specific DBG_VALUE instructions are handled by each target. |
| 794 | return MachineLocation(); |
| 795 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 796 | |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 797 | /// EmitDwarfRegOp - Emit dwarf register operation. |
Devang Patel | 0be77df | 2011-04-27 20:29:27 +0000 | [diff] [blame] | 798 | void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 799 | const TargetRegisterInfo *TRI = TM.getRegisterInfo(); |
Rafael Espindola | 37afca1 | 2011-05-27 22:15:01 +0000 | [diff] [blame] | 800 | int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); |
| 801 | |
Jakob Stoklund Olesen | 396618b | 2012-06-01 23:28:30 +0000 | [diff] [blame] | 802 | for (MCSuperRegIterator SR(MLoc.getReg(), TRI); SR.isValid() && Reg < 0; |
| 803 | ++SR) { |
Rafael Espindola | 37afca1 | 2011-05-27 22:15:01 +0000 | [diff] [blame] | 804 | Reg = TRI->getDwarfRegNum(*SR, false); |
| 805 | // FIXME: Get the bit range this register uses of the superregister |
| 806 | // so that we can produce a DW_OP_bit_piece |
| 807 | } |
| 808 | |
| 809 | // FIXME: Handle cases like a super register being encoded as |
| 810 | // DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33 |
| 811 | |
| 812 | // FIXME: We have no reasonable way of handling errors in here. The |
| 813 | // caller might be in the middle of an dwarf expression. We should |
| 814 | // probably assert that Reg >= 0 once debug info generation is more mature. |
| 815 | |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 816 | if (int Offset = MLoc.getOffset()) { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 817 | if (Reg < 32) { |
| 818 | OutStreamer.AddComment( |
| 819 | dwarf::OperationEncodingString(dwarf::DW_OP_breg0 + Reg)); |
| 820 | EmitInt8(dwarf::DW_OP_breg0 + Reg); |
| 821 | } else { |
| 822 | OutStreamer.AddComment("DW_OP_bregx"); |
| 823 | EmitInt8(dwarf::DW_OP_bregx); |
| 824 | OutStreamer.AddComment(Twine(Reg)); |
| 825 | EmitULEB128(Reg); |
| 826 | } |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 827 | EmitSLEB128(Offset); |
| 828 | } else { |
| 829 | if (Reg < 32) { |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 830 | OutStreamer.AddComment( |
| 831 | dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg)); |
| 832 | EmitInt8(dwarf::DW_OP_reg0 + Reg); |
| 833 | } else { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 834 | OutStreamer.AddComment("DW_OP_regx"); |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 835 | EmitInt8(dwarf::DW_OP_regx); |
| 836 | OutStreamer.AddComment(Twine(Reg)); |
| 837 | EmitULEB128(Reg); |
| 838 | } |
| 839 | } |
Rafael Espindola | 37afca1 | 2011-05-27 22:15:01 +0000 | [diff] [blame] | 840 | |
| 841 | // FIXME: Produce a DW_OP_bit_piece if we used a superregister |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 842 | } |
| 843 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 844 | bool AsmPrinter::doFinalization(Module &M) { |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 845 | // Emit global variables. |
| 846 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 847 | I != E; ++I) |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 848 | EmitGlobalVariable(I); |
Rafael Espindola | 1ffb533 | 2011-01-28 03:20:10 +0000 | [diff] [blame] | 849 | |
| 850 | // Emit visibility info for declarations |
| 851 | for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) { |
| 852 | const Function &F = *I; |
| 853 | if (!F.isDeclaration()) |
| 854 | continue; |
| 855 | GlobalValue::VisibilityTypes V = F.getVisibility(); |
| 856 | if (V == GlobalValue::DefaultVisibility) |
| 857 | continue; |
| 858 | |
| 859 | MCSymbol *Name = Mang->getSymbol(&F); |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 860 | EmitVisibility(Name, V, false); |
Rafael Espindola | 1ffb533 | 2011-01-28 03:20:10 +0000 | [diff] [blame] | 861 | } |
| 862 | |
Bill Wendling | b464d3f | 2012-02-14 21:28:13 +0000 | [diff] [blame] | 863 | // Emit module flags. |
Bill Wendling | 057d521 | 2012-02-15 22:36:15 +0000 | [diff] [blame] | 864 | SmallVector<Module::ModuleFlagEntry, 8> ModuleFlags; |
| 865 | M.getModuleFlagsMetadata(ModuleFlags); |
| 866 | if (!ModuleFlags.empty()) |
| 867 | getObjFileLowering().emitModuleFlags(OutStreamer, ModuleFlags, Mang, TM); |
Bill Wendling | b464d3f | 2012-02-14 21:28:13 +0000 | [diff] [blame] | 868 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 869 | // Finalize debug and EH information. |
| 870 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 871 | { |
| 872 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 873 | DE->EndModule(); |
| 874 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 875 | delete DE; DE = 0; |
| 876 | } |
| 877 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 878 | { |
| 879 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 880 | DD->endModule(); |
| 881 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 882 | delete DD; DD = 0; |
| 883 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 884 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 885 | // If the target wants to know about weak references, print them all. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 886 | if (MAI->getWeakRefDirective()) { |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 887 | // FIXME: This is not lazy, it would be nice to only print weak references |
| 888 | // to stuff that is actually used. Note that doing so would require targets |
| 889 | // to notice uses in operands (due to constant exprs etc). This should |
| 890 | // happen with the MC stuff eventually. |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 891 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 892 | // Print out module-level global variables here. |
| 893 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 894 | I != E; ++I) { |
Chris Lattner | 08ce3b4 | 2010-01-16 18:17:26 +0000 | [diff] [blame] | 895 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 896 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 897 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 898 | |
Chris Lattner | c6fdced | 2009-08-03 23:10:34 +0000 | [diff] [blame] | 899 | for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) { |
Chris Lattner | 08ce3b4 | 2010-01-16 18:17:26 +0000 | [diff] [blame] | 900 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 901 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 902 | } |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 903 | } |
| 904 | |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 905 | if (MAI->hasSetDirective()) { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 906 | OutStreamer.AddBlankLine(); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 907 | for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end(); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 908 | I != E; ++I) { |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 909 | MCSymbol *Name = Mang->getSymbol(I); |
Anton Korobeynikov | 325be7c | 2007-09-06 17:21:48 +0000 | [diff] [blame] | 910 | |
Jay Foad | b899d95 | 2011-08-01 12:27:15 +0000 | [diff] [blame] | 911 | const GlobalValue *GV = I->getAliasedGlobal(); |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 912 | MCSymbol *Target = Mang->getSymbol(GV); |
Anton Korobeynikov | 541af7f | 2008-09-24 22:21:04 +0000 | [diff] [blame] | 913 | |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 914 | if (I->hasExternalLinkage() || !MAI->getWeakRefDirective()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 915 | OutStreamer.EmitSymbolAttribute(Name, MCSA_Global); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 916 | else if (I->hasWeakLinkage()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 917 | OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 918 | else |
Chris Lattner | 1059549 | 2010-01-16 01:37:14 +0000 | [diff] [blame] | 919 | assert(I->hasLocalLinkage() && "Invalid alias linkage"); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 920 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 921 | EmitVisibility(Name, I->getVisibility()); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 922 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 923 | // Emit the directives as assignments aka .set: |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 924 | OutStreamer.EmitAssignment(Name, |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 925 | MCSymbolRefExpr::Create(Target, OutContext)); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 926 | } |
| 927 | } |
| 928 | |
Duncan Sands | 1465d61 | 2009-01-28 13:14:17 +0000 | [diff] [blame] | 929 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 930 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
| 931 | for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; ) |
| 932 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 933 | MP->finishAssembly(*this); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 934 | |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 935 | // If we don't have any trampolines, then we don't require stack memory |
| 936 | // to be executable. Some targets have a directive to declare this. |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 937 | Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline"); |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 938 | if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty()) |
Chris Lattner | 74aae47 | 2010-04-08 21:26:26 +0000 | [diff] [blame] | 939 | if (const MCSection *S = MAI->getNonexecutableStackSection(OutContext)) |
Chris Lattner | f9f93e4 | 2010-01-23 07:21:06 +0000 | [diff] [blame] | 940 | OutStreamer.SwitchSection(S); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 941 | |
Chris Lattner | bd23d5f | 2009-09-18 20:17:03 +0000 | [diff] [blame] | 942 | // Allow the target to emit any magic that it wants at the end of the file, |
| 943 | // after everything else has gone out. |
| 944 | EmitEndOfAsmFile(M); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 945 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 946 | delete Mang; Mang = 0; |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 947 | MMI = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 948 | |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 949 | OutStreamer.Finish(); |
Pedro Artigas | 5399d25 | 2012-12-12 22:59:46 +0000 | [diff] [blame] | 950 | OutStreamer.reset(); |
| 951 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 952 | return false; |
| 953 | } |
| 954 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 955 | void AsmPrinter::SetupMachineFunction(MachineFunction &MF) { |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 956 | this->MF = &MF; |
Chris Lattner | 412c3a5 | 2010-01-16 01:24:10 +0000 | [diff] [blame] | 957 | // Get the function symbol. |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 958 | CurrentFnSym = Mang->getSymbol(MF.getFunction()); |
Hal Finkel | d55a266 | 2012-02-22 21:11:47 +0000 | [diff] [blame] | 959 | CurrentFnSymForSize = CurrentFnSym; |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 960 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 961 | if (isVerbose()) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 962 | LI = &getAnalysis<MachineLoopInfo>(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 963 | } |
| 964 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 965 | namespace { |
| 966 | // SectionCPs - Keep track the alignment, constpool entries per Section. |
| 967 | struct SectionCPs { |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 968 | const MCSection *S; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 969 | unsigned Alignment; |
| 970 | SmallVector<unsigned, 4> CPEs; |
Douglas Gregor | cabdd74 | 2009-12-19 07:05:23 +0000 | [diff] [blame] | 971 | SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {} |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 972 | }; |
| 973 | } |
| 974 | |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 975 | /// EmitConstantPool - Print to the current output stream assembly |
| 976 | /// representations of the constants in the constant pool MCP. This is |
| 977 | /// used to print out constants which have been "spilled to memory" by |
| 978 | /// the code generator. |
| 979 | /// |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 980 | void AsmPrinter::EmitConstantPool() { |
| 981 | const MachineConstantPool *MCP = MF->getConstantPool(); |
Chris Lattner | fa77d43 | 2006-02-09 04:22:52 +0000 | [diff] [blame] | 982 | const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants(); |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 983 | if (CP.empty()) return; |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 984 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 985 | // Calculate sections for constant pool entries. We collect entries to go into |
| 986 | // the same section together to reduce amount of section switch statements. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 987 | SmallVector<SectionCPs, 4> CPSections; |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 988 | for (unsigned i = 0, e = CP.size(); i != e; ++i) { |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 989 | const MachineConstantPoolEntry &CPE = CP[i]; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 990 | unsigned Align = CPE.getAlignment(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 991 | |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 992 | SectionKind Kind; |
| 993 | switch (CPE.getRelocationInfo()) { |
| 994 | default: llvm_unreachable("Unknown section kind"); |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 995 | case 2: Kind = SectionKind::getReadOnlyWithRel(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 996 | case 1: |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 997 | Kind = SectionKind::getReadOnlyWithRelLocal(); |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 998 | break; |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 999 | case 0: |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1000 | switch (TM.getDataLayout()->getTypeAllocSize(CPE.getType())) { |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 1001 | case 4: Kind = SectionKind::getMergeableConst4(); break; |
| 1002 | case 8: Kind = SectionKind::getMergeableConst8(); break; |
| 1003 | case 16: Kind = SectionKind::getMergeableConst16();break; |
| 1004 | default: Kind = SectionKind::getMergeableConst(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 1005 | } |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 1006 | } |
| 1007 | |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 1008 | const MCSection *S = getObjFileLowering().getSectionForConstant(Kind); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1009 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1010 | // The number of sections are small, just do a linear search from the |
| 1011 | // last section to the first. |
| 1012 | bool Found = false; |
| 1013 | unsigned SecIdx = CPSections.size(); |
| 1014 | while (SecIdx != 0) { |
| 1015 | if (CPSections[--SecIdx].S == S) { |
| 1016 | Found = true; |
| 1017 | break; |
| 1018 | } |
| 1019 | } |
| 1020 | if (!Found) { |
| 1021 | SecIdx = CPSections.size(); |
| 1022 | CPSections.push_back(SectionCPs(S, Align)); |
| 1023 | } |
| 1024 | |
| 1025 | if (Align > CPSections[SecIdx].Alignment) |
| 1026 | CPSections[SecIdx].Alignment = Align; |
| 1027 | CPSections[SecIdx].CPEs.push_back(i); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 1028 | } |
| 1029 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 1030 | // Now print stuff into the calculated sections. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1031 | for (unsigned i = 0, e = CPSections.size(); i != e; ++i) { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1032 | OutStreamer.SwitchSection(CPSections[i].S); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1033 | EmitAlignment(Log2_32(CPSections[i].Alignment)); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 1034 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1035 | unsigned Offset = 0; |
| 1036 | for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) { |
| 1037 | unsigned CPI = CPSections[i].CPEs[j]; |
| 1038 | MachineConstantPoolEntry CPE = CP[CPI]; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 1039 | |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 1040 | // Emit inter-object padding for alignment. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1041 | unsigned AlignMask = CPE.getAlignment() - 1; |
| 1042 | unsigned NewOffset = (Offset + AlignMask) & ~AlignMask; |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1043 | OutStreamer.EmitZeros(NewOffset - Offset); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1044 | |
Chris Lattner | db125cf | 2011-07-18 04:54:35 +0000 | [diff] [blame] | 1045 | Type *Ty = CPE.getType(); |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1046 | Offset = NewOffset + TM.getDataLayout()->getTypeAllocSize(Ty); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1047 | OutStreamer.EmitLabel(GetCPISymbol(CPI)); |
| 1048 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1049 | if (CPE.isMachineConstantPoolEntry()) |
| 1050 | EmitMachineConstantPoolValue(CPE.Val.MachineCPVal); |
| 1051 | else |
| 1052 | EmitGlobalConstant(CPE.Val.ConstVal); |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 1053 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 1054 | } |
| 1055 | } |
| 1056 | |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1057 | /// EmitJumpTableInfo - Print assembly representations of the jump tables used |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1058 | /// by the current function to the current output stream. |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1059 | /// |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1060 | void AsmPrinter::EmitJumpTableInfo() { |
| 1061 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
Chris Lattner | 44e8725 | 2010-01-25 22:41:33 +0000 | [diff] [blame] | 1062 | if (MJTI == 0) return; |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 1063 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return; |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1064 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 1065 | if (JT.empty()) return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1066 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1067 | // Pick the directive to use to print the jump table entries, and switch to |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1068 | // the appropriate section. |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1069 | const Function *F = MF->getFunction(); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 1070 | bool JTInDiffSection = false; |
Chris Lattner | f1214cb | 2010-01-26 06:53:37 +0000 | [diff] [blame] | 1071 | if (// In PIC mode, we need to emit the jump table to the same section as the |
| 1072 | // function body itself, otherwise the label differences won't make sense. |
| 1073 | // FIXME: Need a better predicate for this: what about custom entries? |
| 1074 | MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 || |
| 1075 | // We should also do if the section name is NULL or function is declared |
| 1076 | // in discardable section |
| 1077 | // FIXME: this isn't the right predicate, should be based on the MCSection |
| 1078 | // for the function. |
| 1079 | F->isWeakForLinker()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1080 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM)); |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1081 | } else { |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 1082 | // Otherwise, drop it in the readonly section. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1083 | const MCSection *ReadOnlySection = |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 1084 | getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly()); |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1085 | OutStreamer.SwitchSection(ReadOnlySection); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 1086 | JTInDiffSection = true; |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1087 | } |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1088 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1089 | EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getDataLayout()))); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1090 | |
Jim Grosbach | e9525d8 | 2012-09-24 23:06:27 +0000 | [diff] [blame] | 1091 | // Jump tables in code sections are marked with a data_region directive |
| 1092 | // where that's supported. |
| 1093 | if (!JTInDiffSection) |
| 1094 | OutStreamer.EmitDataRegion(MCDR_DataRegionJT32); |
| 1095 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1096 | for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) { |
| 1097 | const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1098 | |
| 1099 | // If this jump table was deleted, ignore it. |
Chris Lattner | 0737188 | 2006-10-28 18:10:06 +0000 | [diff] [blame] | 1100 | if (JTBBs.empty()) continue; |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 1101 | |
Chris Lattner | e35df92 | 2010-01-26 05:15:20 +0000 | [diff] [blame] | 1102 | // For the EK_LabelDifference32 entry, if the target supports .set, emit a |
| 1103 | // .set directive for each unique entry. This reduces the number of |
| 1104 | // relocations the assembler will generate for the jump table. |
| 1105 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 && |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 1106 | MAI->hasSetDirective()) { |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1107 | SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets; |
| 1108 | const TargetLowering *TLI = TM.getTargetLowering(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1109 | const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1110 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) { |
| 1111 | const MachineBasicBlock *MBB = JTBBs[ii]; |
| 1112 | if (!EmittedSets.insert(MBB)) continue; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1113 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 1114 | // .set LJTSet, LBB32-base |
| 1115 | const MCExpr *LHS = |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1116 | MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 1117 | OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()), |
| 1118 | MCBinaryExpr::CreateSub(LHS, Base, OutContext)); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1119 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1120 | } |
| 1121 | |
Duncan Sands | ab4c366 | 2011-02-15 09:23:02 +0000 | [diff] [blame] | 1122 | // On some targets (e.g. Darwin) we want to emit two consecutive labels |
Chris Lattner | 393a8ee | 2007-01-18 01:12:56 +0000 | [diff] [blame] | 1123 | // before each jump table. The first label is never referenced, but tells |
| 1124 | // the assembler and linker the extents of the jump table object. The |
| 1125 | // second label is actually referenced by the code. |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1126 | if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0]) |
Chris Lattner | beeb93e | 2010-01-26 05:58:28 +0000 | [diff] [blame] | 1127 | // FIXME: This doesn't have to have any specific name, just any randomly |
| 1128 | // named and numbered 'l' label would work. Simplify GetJTISymbol. |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1129 | OutStreamer.EmitLabel(GetJTISymbol(JTI, true)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1130 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1131 | OutStreamer.EmitLabel(GetJTISymbol(JTI)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1132 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1133 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1134 | EmitJumpTableEntry(MJTI, JTBBs[ii], JTI); |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1135 | } |
Jim Grosbach | e9525d8 | 2012-09-24 23:06:27 +0000 | [diff] [blame] | 1136 | if (!JTInDiffSection) |
| 1137 | OutStreamer.EmitDataRegion(MCDR_DataRegionEnd); |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1138 | } |
| 1139 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1140 | /// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the |
| 1141 | /// current stream. |
| 1142 | void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 1143 | const MachineBasicBlock *MBB, |
| 1144 | unsigned UID) const { |
Jakob Stoklund Olesen | e5005d0 | 2011-02-09 21:52:06 +0000 | [diff] [blame] | 1145 | assert(MBB && MBB->getNumber() >= 0 && "Invalid basic block"); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1146 | const MCExpr *Value = 0; |
| 1147 | switch (MJTI->getEntryKind()) { |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 1148 | case MachineJumpTableInfo::EK_Inline: |
David Blaikie | 4d6ccb5 | 2012-01-20 21:51:11 +0000 | [diff] [blame] | 1149 | llvm_unreachable("Cannot emit EK_Inline jump table entry"); |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1150 | case MachineJumpTableInfo::EK_Custom32: |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1151 | Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID, |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1152 | OutContext); |
| 1153 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1154 | case MachineJumpTableInfo::EK_BlockAddress: |
| 1155 | // EK_BlockAddress - Each entry is a plain address of block, e.g.: |
| 1156 | // .word LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1157 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1158 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1159 | case MachineJumpTableInfo::EK_GPRel32BlockAddress: { |
| 1160 | // EK_GPRel32BlockAddress - Each entry is an address of block, encoded |
| 1161 | // with a relocation as gp-relative, e.g.: |
| 1162 | // .gprel32 LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1163 | MCSymbol *MBBSym = MBB->getSymbol(); |
Chris Lattner | 718fb59 | 2010-01-25 21:28:50 +0000 | [diff] [blame] | 1164 | OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext)); |
Chris Lattner | 78f485a | 2010-01-25 21:10:10 +0000 | [diff] [blame] | 1165 | return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1166 | } |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1167 | |
Akira Hatanaka | 6c2cf8b | 2012-02-03 04:33:00 +0000 | [diff] [blame] | 1168 | case MachineJumpTableInfo::EK_GPRel64BlockAddress: { |
| 1169 | // EK_GPRel64BlockAddress - Each entry is an address of block, encoded |
| 1170 | // with a relocation as gp-relative, e.g.: |
| 1171 | // .gpdword LBB123 |
| 1172 | MCSymbol *MBBSym = MBB->getSymbol(); |
| 1173 | OutStreamer.EmitGPRel64Value(MCSymbolRefExpr::Create(MBBSym, OutContext)); |
| 1174 | return; |
| 1175 | } |
| 1176 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1177 | case MachineJumpTableInfo::EK_LabelDifference32: { |
| 1178 | // EK_LabelDifference32 - Each entry is the address of the block minus |
| 1179 | // the address of the jump table. This is used for PIC jump tables where |
| 1180 | // gprel32 is not supported. e.g.: |
| 1181 | // .word LBB123 - LJTI1_2 |
| 1182 | // If the .set directive is supported, this is emitted as: |
| 1183 | // .set L4_5_set_123, LBB123 - LJTI1_2 |
| 1184 | // .word L4_5_set_123 |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1185 | |
| 1186 | // If we have emitted set directives for the jump table entries, print |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1187 | // them rather than the entries themselves. If we're emitting PIC, then |
| 1188 | // emit the table entries as differences between two text section labels. |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 1189 | if (MAI->hasSetDirective()) { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1190 | // If we used .set, reference the .set's symbol. |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1191 | Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()), |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1192 | OutContext); |
| 1193 | break; |
| 1194 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 1195 | // Otherwise, use the difference as the jump table entry. |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1196 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1197 | const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1198 | Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext); |
| 1199 | break; |
| 1200 | } |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1201 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1202 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1203 | assert(Value && "Unknown entry kind!"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1204 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1205 | unsigned EntrySize = MJTI->getEntrySize(*TM.getDataLayout()); |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1206 | OutStreamer.EmitValue(Value, EntrySize); |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1207 | } |
| 1208 | |
| 1209 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1210 | /// EmitSpecialLLVMGlobal - Check to see if the specified global is a |
| 1211 | /// special global used by LLVM. If so, emit it and return true, otherwise |
| 1212 | /// do nothing and return false. |
| 1213 | bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) { |
Daniel Dunbar | 03d7651 | 2009-07-25 23:55:21 +0000 | [diff] [blame] | 1214 | if (GV->getName() == "llvm.used") { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1215 | if (MAI->hasNoDeadStrip()) // No need to emit this at all. |
Rafael Espindola | cde25b4 | 2013-04-22 14:58:02 +0000 | [diff] [blame^] | 1216 | EmitLLVMUsedList(cast<ConstantArray>(GV->getInitializer())); |
Andrew Lenharth | b753a9b | 2007-08-22 19:33:11 +0000 | [diff] [blame] | 1217 | return true; |
| 1218 | } |
| 1219 | |
Chris Lattner | 401e10c | 2009-07-20 06:14:25 +0000 | [diff] [blame] | 1220 | // Ignore debug and non-emitted data. This handles llvm.compiler.used. |
Chris Lattner | 266c7bb | 2009-04-13 05:44:34 +0000 | [diff] [blame] | 1221 | if (GV->getSection() == "llvm.metadata" || |
| 1222 | GV->hasAvailableExternallyLinkage()) |
| 1223 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1224 | |
Jim Laskey | 7809811 | 2006-03-07 22:00:35 +0000 | [diff] [blame] | 1225 | if (!GV->hasAppendingLinkage()) return false; |
| 1226 | |
| 1227 | assert(GV->hasInitializer() && "Not a special LLVM global!"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1228 | |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 1229 | if (GV->getName() == "llvm.global_ctors") { |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1230 | EmitXXStructorList(GV->getInitializer(), /* isCtor */ true); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1231 | |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 1232 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1233 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 1234 | StringRef Sym(".constructors_used"); |
| 1235 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 1236 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1237 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1238 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1239 | } |
| 1240 | |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 1241 | if (GV->getName() == "llvm.global_dtors") { |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1242 | EmitXXStructorList(GV->getInitializer(), /* isCtor */ false); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 1243 | |
| 1244 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1245 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 1246 | StringRef Sym(".destructors_used"); |
| 1247 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 1248 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1249 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1250 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1251 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1252 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1253 | return false; |
| 1254 | } |
| 1255 | |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 1256 | /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each |
Dale Johannesen | d2e51af | 2008-09-09 22:29:13 +0000 | [diff] [blame] | 1257 | /// global in the specified llvm.used list for which emitUsedDirectiveFor |
| 1258 | /// is true, as being used with this directive. |
Rafael Espindola | cde25b4 | 2013-04-22 14:58:02 +0000 | [diff] [blame^] | 1259 | void AsmPrinter::EmitLLVMUsedList(const ConstantArray *InitList) { |
Dan Gohman | a119de8 | 2009-06-14 23:30:43 +0000 | [diff] [blame] | 1260 | // Should be an array of 'i8*'. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1261 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
Chris Lattner | 16fe990 | 2009-07-17 22:00:23 +0000 | [diff] [blame] | 1262 | const GlobalValue *GV = |
| 1263 | dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts()); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1264 | if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 1265 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip); |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1266 | } |
| 1267 | } |
| 1268 | |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1269 | typedef std::pair<unsigned, Constant*> Structor; |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1270 | |
Duncan Sands | 9a7d48a | 2011-09-29 16:01:46 +0000 | [diff] [blame] | 1271 | static bool priority_order(const Structor& lhs, const Structor& rhs) { |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1272 | return lhs.first < rhs.first; |
| 1273 | } |
| 1274 | |
| 1275 | /// EmitXXStructorList - Emit the ctor or dtor list taking into account the init |
| 1276 | /// priority. |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1277 | void AsmPrinter::EmitXXStructorList(const Constant *List, bool isCtor) { |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1278 | // Should be an array of '{ int, void ()* }' structs. The first value is the |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1279 | // init priority. |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1280 | if (!isa<ConstantArray>(List)) return; |
Chris Lattner | 8de324b | 2005-12-21 01:17:37 +0000 | [diff] [blame] | 1281 | |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1282 | // Sanity check the structors list. |
| 1283 | const ConstantArray *InitList = dyn_cast<ConstantArray>(List); |
| 1284 | if (!InitList) return; // Not an array! |
| 1285 | StructType *ETy = dyn_cast<StructType>(InitList->getType()->getElementType()); |
| 1286 | if (!ETy || ETy->getNumElements() != 2) return; // Not an array of pairs! |
| 1287 | if (!isa<IntegerType>(ETy->getTypeAtIndex(0U)) || |
| 1288 | !isa<PointerType>(ETy->getTypeAtIndex(1U))) return; // Not (int, ptr). |
| 1289 | |
| 1290 | // Gather the structors in a form that's convenient for sorting by priority. |
| 1291 | SmallVector<Structor, 8> Structors; |
| 1292 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
| 1293 | ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i)); |
| 1294 | if (!CS) continue; // Malformed. |
| 1295 | if (CS->getOperand(1)->isNullValue()) |
| 1296 | break; // Found a null terminator, skip the rest. |
| 1297 | ConstantInt *Priority = dyn_cast<ConstantInt>(CS->getOperand(0)); |
| 1298 | if (!Priority) continue; // Malformed. |
| 1299 | Structors.push_back(std::make_pair(Priority->getLimitedValue(65535), |
| 1300 | CS->getOperand(1))); |
| 1301 | } |
| 1302 | |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1303 | // Emit the function pointers in the target-specific order |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1304 | const DataLayout *TD = TM.getDataLayout(); |
Chandler Carruth | 426c2bf | 2012-11-01 09:14:31 +0000 | [diff] [blame] | 1305 | unsigned Align = Log2_32(TD->getPointerPrefAlignment()); |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1306 | std::stable_sort(Structors.begin(), Structors.end(), priority_order); |
| 1307 | for (unsigned i = 0, e = Structors.size(); i != e; ++i) { |
| 1308 | const MCSection *OutputSection = |
| 1309 | (isCtor ? |
| 1310 | getObjFileLowering().getStaticCtorSection(Structors[i].first) : |
| 1311 | getObjFileLowering().getStaticDtorSection(Structors[i].first)); |
| 1312 | OutStreamer.SwitchSection(OutputSection); |
| 1313 | if (OutStreamer.getCurrentSection() != OutStreamer.getPreviousSection()) |
| 1314 | EmitAlignment(Align); |
James Molloy | 3498257 | 2012-01-26 09:25:43 +0000 | [diff] [blame] | 1315 | EmitXXStructor(Structors[i].second); |
Anton Korobeynikov | 4a99f59 | 2012-01-25 22:24:19 +0000 | [diff] [blame] | 1316 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1317 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 1318 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1319 | //===--------------------------------------------------------------------===// |
| 1320 | // Emission and print routines |
| 1321 | // |
| 1322 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1323 | /// EmitInt8 - Emit a byte directive and value. |
| 1324 | /// |
| 1325 | void AsmPrinter::EmitInt8(int Value) const { |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1326 | OutStreamer.EmitIntValue(Value, 1); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | /// EmitInt16 - Emit a short directive and value. |
| 1330 | /// |
| 1331 | void AsmPrinter::EmitInt16(int Value) const { |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1332 | OutStreamer.EmitIntValue(Value, 2); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1333 | } |
| 1334 | |
| 1335 | /// EmitInt32 - Emit a long directive and value. |
| 1336 | /// |
| 1337 | void AsmPrinter::EmitInt32(int Value) const { |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1338 | OutStreamer.EmitIntValue(Value, 4); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1339 | } |
| 1340 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1341 | /// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size |
| 1342 | /// in bytes of the directive is specified by Size and Hi/Lo specify the |
| 1343 | /// labels. This implicitly uses .set if it is available. |
| 1344 | void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo, |
| 1345 | unsigned Size) const { |
| 1346 | // Get the Hi-Lo expression. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1347 | const MCExpr *Diff = |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1348 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext), |
| 1349 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 1350 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1351 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1352 | if (!MAI->hasSetDirective()) { |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1353 | OutStreamer.EmitValue(Diff, Size); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1354 | return; |
| 1355 | } |
| 1356 | |
| 1357 | // Otherwise, emit with .set (aka assignment). |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1358 | MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1359 | OutStreamer.EmitAssignment(SetLabel, Diff); |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1360 | OutStreamer.EmitSymbolValue(SetLabel, Size); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1361 | } |
| 1362 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1363 | /// EmitLabelOffsetDifference - Emit something like ".long Hi+Offset-Lo" |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1364 | /// where the size in bytes of the directive is specified by Size and Hi/Lo |
| 1365 | /// specify the labels. This implicitly uses .set if it is available. |
| 1366 | void AsmPrinter::EmitLabelOffsetDifference(const MCSymbol *Hi, uint64_t Offset, |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1367 | const MCSymbol *Lo, unsigned Size) |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1368 | const { |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1369 | |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1370 | // Emit Hi+Offset - Lo |
| 1371 | // Get the Hi+Offset expression. |
| 1372 | const MCExpr *Plus = |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1373 | MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Hi, OutContext), |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1374 | MCConstantExpr::Create(Offset, OutContext), |
| 1375 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1376 | |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1377 | // Get the Hi+Offset-Lo expression. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1378 | const MCExpr *Diff = |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1379 | MCBinaryExpr::CreateSub(Plus, |
| 1380 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 1381 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1382 | |
| 1383 | if (!MAI->hasSetDirective()) |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1384 | OutStreamer.EmitValue(Diff, 4); |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1385 | else { |
| 1386 | // Otherwise, emit with .set (aka assignment). |
| 1387 | MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++); |
| 1388 | OutStreamer.EmitAssignment(SetLabel, Diff); |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1389 | OutStreamer.EmitSymbolValue(SetLabel, 4); |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1390 | } |
| 1391 | } |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1392 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1393 | /// EmitLabelPlusOffset - Emit something like ".long Label+Offset" |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1394 | /// where the size in bytes of the directive is specified by Size and Label |
| 1395 | /// specifies the label. This implicitly uses .set if it is available. |
| 1396 | void AsmPrinter::EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset, |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1397 | unsigned Size) |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1398 | const { |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1399 | |
Nick Lewycky | ffccd92 | 2012-06-22 01:25:12 +0000 | [diff] [blame] | 1400 | // Emit Label+Offset (or just Label if Offset is zero) |
| 1401 | const MCExpr *Expr = MCSymbolRefExpr::Create(Label, OutContext); |
| 1402 | if (Offset) |
| 1403 | Expr = MCBinaryExpr::CreateAdd(Expr, |
| 1404 | MCConstantExpr::Create(Offset, OutContext), |
| 1405 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1406 | |
Eric Christopher | ca1dd05 | 2013-01-09 01:35:34 +0000 | [diff] [blame] | 1407 | OutStreamer.EmitValue(Expr, Size); |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1408 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1409 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1410 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1411 | //===----------------------------------------------------------------------===// |
| 1412 | |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 1413 | // EmitAlignment - Emit an alignment directive to the specified power of |
| 1414 | // two boundary. For example, if you pass in 3 here, you will get an 8 |
| 1415 | // byte alignment. If a global value is specified, and if that global has |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1416 | // an explicit alignment requested, it will override the alignment request |
| 1417 | // if required for correctness. |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 1418 | // |
Chris Lattner | a7b611c | 2010-04-28 01:08:40 +0000 | [diff] [blame] | 1419 | void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1420 | if (GV) NumBits = getGVAlignmentLog2(GV, *TM.getDataLayout(), NumBits); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1421 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1422 | if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1423 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 1424 | if (getCurrentSection()->getKind().isText()) |
Chris Lattner | 2cce371 | 2010-02-23 18:46:22 +0000 | [diff] [blame] | 1425 | OutStreamer.EmitCodeAlignment(1 << NumBits); |
| 1426 | else |
| 1427 | OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0); |
Chris Lattner | bfddc20 | 2004-08-17 19:14:29 +0000 | [diff] [blame] | 1428 | } |
David Greene | a5bb59f | 2009-08-05 21:00:52 +0000 | [diff] [blame] | 1429 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1430 | //===----------------------------------------------------------------------===// |
| 1431 | // Constant emission. |
| 1432 | //===----------------------------------------------------------------------===// |
| 1433 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1434 | /// lowerConstant - Lower the specified LLVM Constant to an MCExpr. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1435 | /// |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1436 | static const MCExpr *lowerConstant(const Constant *CV, AsmPrinter &AP) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1437 | MCContext &Ctx = AP.OutContext; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1438 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1439 | if (CV->isNullValue() || isa<UndefValue>(CV)) |
| 1440 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1441 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1442 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) |
| 1443 | return MCConstantExpr::Create(CI->getZExtValue(), Ctx); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1444 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1445 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 1446 | return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx); |
Bill Wendling | 3d7ff08 | 2010-08-18 18:41:13 +0000 | [diff] [blame] | 1447 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1448 | if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) |
| 1449 | return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1450 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1451 | const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV); |
| 1452 | if (CE == 0) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1453 | llvm_unreachable("Unknown constant value to lower!"); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1454 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1455 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1456 | switch (CE->getOpcode()) { |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1457 | default: |
| 1458 | // If the code isn't optimized, there may be outstanding folding |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1459 | // opportunities. Attempt to fold the expression using DataLayout as a |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1460 | // last resort before giving up. |
Dan Gohman | 54e72ec | 2010-02-08 22:19:11 +0000 | [diff] [blame] | 1461 | if (Constant *C = |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1462 | ConstantFoldConstantExpression(CE, AP.TM.getDataLayout())) |
Dan Gohman | 54e72ec | 2010-02-08 22:19:11 +0000 | [diff] [blame] | 1463 | if (C != CE) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1464 | return lowerConstant(C, AP); |
Dan Gohman | 9f6a6862 | 2010-08-04 18:51:09 +0000 | [diff] [blame] | 1465 | |
| 1466 | // Otherwise report the problem to the user. |
| 1467 | { |
| 1468 | std::string S; |
| 1469 | raw_string_ostream OS(S); |
| 1470 | OS << "Unsupported expression in static initializer: "; |
| 1471 | WriteAsOperand(OS, CE, /*PrintType=*/false, |
| 1472 | !AP.MF ? 0 : AP.MF->getFunction()->getParent()); |
| 1473 | report_fatal_error(OS.str()); |
| 1474 | } |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1475 | case Instruction::GetElementPtr: { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1476 | const DataLayout &TD = *AP.TM.getDataLayout(); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1477 | // Generate a symbolic expression for the byte address |
Nuno Lopes | 98281a2 | 2012-12-30 16:25:48 +0000 | [diff] [blame] | 1478 | APInt OffsetAI(TD.getPointerSizeInBits(), 0); |
| 1479 | cast<GEPOperator>(CE)->accumulateConstantOffset(TD, OffsetAI); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1480 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1481 | const MCExpr *Base = lowerConstant(CE->getOperand(0), AP); |
Nuno Lopes | 98281a2 | 2012-12-30 16:25:48 +0000 | [diff] [blame] | 1482 | if (!OffsetAI) |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1483 | return Base; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1484 | |
Nuno Lopes | 98281a2 | 2012-12-30 16:25:48 +0000 | [diff] [blame] | 1485 | int64_t Offset = OffsetAI.getSExtValue(); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1486 | return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx), |
| 1487 | Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1488 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1489 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1490 | case Instruction::Trunc: |
| 1491 | // We emit the value and depend on the assembler to truncate the generated |
| 1492 | // expression properly. This is important for differences between |
| 1493 | // blockaddress labels. Since the two labels are in the same function, it |
| 1494 | // is reasonable to treat their delta as a 32-bit value. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1495 | // FALL THROUGH. |
| 1496 | case Instruction::BitCast: |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1497 | return lowerConstant(CE->getOperand(0), AP); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1498 | |
| 1499 | case Instruction::IntToPtr: { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1500 | const DataLayout &TD = *AP.TM.getDataLayout(); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1501 | // Handle casts to pointers by changing them into casts to the appropriate |
| 1502 | // integer type. This promotes constant folding and simplifies this code. |
| 1503 | Constant *Op = CE->getOperand(0); |
Chandler Carruth | ece6c6b | 2012-11-01 08:07:29 +0000 | [diff] [blame] | 1504 | Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()), |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1505 | false/*ZExt*/); |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1506 | return lowerConstant(Op, AP); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1507 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1508 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1509 | case Instruction::PtrToInt: { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1510 | const DataLayout &TD = *AP.TM.getDataLayout(); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1511 | // Support only foldable casts to/from pointers that can be eliminated by |
| 1512 | // changing the pointer to the appropriately sized integer type. |
| 1513 | Constant *Op = CE->getOperand(0); |
Chris Lattner | db125cf | 2011-07-18 04:54:35 +0000 | [diff] [blame] | 1514 | Type *Ty = CE->getType(); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1515 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1516 | const MCExpr *OpExpr = lowerConstant(Op, AP); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1517 | |
| 1518 | // We can emit the pointer value into this slot if the slot is an |
| 1519 | // integer slot equal to the size of the pointer. |
| 1520 | if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType())) |
| 1521 | return OpExpr; |
| 1522 | |
| 1523 | // Otherwise the pointer is smaller than the resultant integer, mask off |
| 1524 | // the high bits so we are sure to get a proper truncation if the input is |
| 1525 | // a constant expr. |
| 1526 | unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType()); |
| 1527 | const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx); |
| 1528 | return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx); |
| 1529 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1530 | |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1531 | // The MC library also has a right-shift operator, but it isn't consistently |
| 1532 | // signed or unsigned between different targets. |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1533 | case Instruction::Add: |
| 1534 | case Instruction::Sub: |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1535 | case Instruction::Mul: |
| 1536 | case Instruction::SDiv: |
| 1537 | case Instruction::SRem: |
| 1538 | case Instruction::Shl: |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1539 | case Instruction::And: |
| 1540 | case Instruction::Or: |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1541 | case Instruction::Xor: { |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1542 | const MCExpr *LHS = lowerConstant(CE->getOperand(0), AP); |
| 1543 | const MCExpr *RHS = lowerConstant(CE->getOperand(1), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1544 | switch (CE->getOpcode()) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1545 | default: llvm_unreachable("Unknown binary operator constant cast expr"); |
| 1546 | case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx); |
| 1547 | case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx); |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1548 | case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx); |
| 1549 | case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx); |
| 1550 | case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx); |
| 1551 | case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1552 | case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx); |
| 1553 | case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx); |
| 1554 | case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1555 | } |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1556 | } |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 1557 | } |
| 1558 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1559 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1560 | static void emitGlobalConstantImpl(const Constant *C, unsigned AddrSpace, |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1561 | AsmPrinter &AP); |
| 1562 | |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1563 | /// isRepeatedByteSequence - Determine whether the given value is |
| 1564 | /// composed of a repeated sequence of identical bytes and return the |
| 1565 | /// byte value. If it is not a repeated sequence, return -1. |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1566 | static int isRepeatedByteSequence(const ConstantDataSequential *V) { |
| 1567 | StringRef Data = V->getRawDataValues(); |
| 1568 | assert(!Data.empty() && "Empty aggregates should be CAZ node"); |
| 1569 | char C = Data[0]; |
| 1570 | for (unsigned i = 1, e = Data.size(); i != e; ++i) |
| 1571 | if (Data[i] != C) return -1; |
Chandler Carruth | beb0595 | 2012-01-30 23:47:44 +0000 | [diff] [blame] | 1572 | return static_cast<uint8_t>(C); // Ensure 255 is not returned as -1. |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1573 | } |
| 1574 | |
| 1575 | |
| 1576 | /// isRepeatedByteSequence - Determine whether the given value is |
| 1577 | /// composed of a repeated sequence of identical bytes and return the |
| 1578 | /// byte value. If it is not a repeated sequence, return -1. |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1579 | static int isRepeatedByteSequence(const Value *V, TargetMachine &TM) { |
| 1580 | |
| 1581 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { |
| 1582 | if (CI->getBitWidth() > 64) return -1; |
| 1583 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1584 | uint64_t Size = TM.getDataLayout()->getTypeAllocSize(V->getType()); |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1585 | uint64_t Value = CI->getZExtValue(); |
| 1586 | |
| 1587 | // Make sure the constant is at least 8 bits long and has a power |
| 1588 | // of 2 bit width. This guarantees the constant bit width is |
| 1589 | // always a multiple of 8 bits, avoiding issues with padding out |
| 1590 | // to Size and other such corner cases. |
| 1591 | if (CI->getBitWidth() < 8 || !isPowerOf2_64(CI->getBitWidth())) return -1; |
| 1592 | |
| 1593 | uint8_t Byte = static_cast<uint8_t>(Value); |
| 1594 | |
| 1595 | for (unsigned i = 1; i < Size; ++i) { |
| 1596 | Value >>= 8; |
| 1597 | if (static_cast<uint8_t>(Value) != Byte) return -1; |
| 1598 | } |
| 1599 | return Byte; |
| 1600 | } |
| 1601 | if (const ConstantArray *CA = dyn_cast<ConstantArray>(V)) { |
| 1602 | // Make sure all array elements are sequences of the same repeated |
| 1603 | // byte. |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1604 | assert(CA->getNumOperands() != 0 && "Should be a CAZ"); |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1605 | int Byte = isRepeatedByteSequence(CA->getOperand(0), TM); |
| 1606 | if (Byte == -1) return -1; |
| 1607 | |
| 1608 | for (unsigned i = 1, e = CA->getNumOperands(); i != e; ++i) { |
| 1609 | int ThisByte = isRepeatedByteSequence(CA->getOperand(i), TM); |
| 1610 | if (ThisByte == -1) return -1; |
| 1611 | if (Byte != ThisByte) return -1; |
| 1612 | } |
| 1613 | return Byte; |
| 1614 | } |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1615 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1616 | if (const ConstantDataSequential *CDS = dyn_cast<ConstantDataSequential>(V)) |
| 1617 | return isRepeatedByteSequence(CDS); |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1618 | |
| 1619 | return -1; |
| 1620 | } |
| 1621 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1622 | static void emitGlobalConstantDataSequential(const ConstantDataSequential *CDS, |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1623 | unsigned AddrSpace,AsmPrinter &AP){ |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1624 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1625 | // See if we can aggregate this into a .fill, if so, emit it as such. |
| 1626 | int Value = isRepeatedByteSequence(CDS, AP.TM); |
| 1627 | if (Value != -1) { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1628 | uint64_t Bytes = AP.TM.getDataLayout()->getTypeAllocSize(CDS->getType()); |
Chris Lattner | c63352f | 2012-01-31 03:39:24 +0000 | [diff] [blame] | 1629 | // Don't emit a 1-byte object as a .fill. |
| 1630 | if (Bytes > 1) |
| 1631 | return AP.OutStreamer.EmitFill(Bytes, Value, AddrSpace); |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1632 | } |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1633 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1634 | // If this can be emitted with .ascii/.asciz, emit it as such. |
| 1635 | if (CDS->isString()) |
| 1636 | return AP.OutStreamer.EmitBytes(CDS->getAsString(), AddrSpace); |
| 1637 | |
| 1638 | // Otherwise, emit the values in successive locations. |
| 1639 | unsigned ElementByteSize = CDS->getElementByteSize(); |
| 1640 | if (isa<IntegerType>(CDS->getElementType())) { |
Chris Lattner | 0f193b8 | 2012-01-25 01:27:20 +0000 | [diff] [blame] | 1641 | for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) { |
Chris Lattner | b66fb5a | 2012-01-30 05:55:11 +0000 | [diff] [blame] | 1642 | if (AP.isVerbose()) |
| 1643 | AP.OutStreamer.GetCommentOS() << format("0x%" PRIx64 "\n", |
| 1644 | CDS->getElementAsInteger(i)); |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1645 | AP.OutStreamer.EmitIntValue(CDS->getElementAsInteger(i), |
| 1646 | ElementByteSize, AddrSpace); |
| 1647 | } |
Chris Lattner | 6e64c38 | 2012-01-30 05:49:43 +0000 | [diff] [blame] | 1648 | } else if (ElementByteSize == 4) { |
| 1649 | // FP Constants are printed as integer constants to avoid losing |
| 1650 | // precision. |
| 1651 | assert(CDS->getElementType()->isFloatTy()); |
Chris Lattner | 0f193b8 | 2012-01-25 01:27:20 +0000 | [diff] [blame] | 1652 | for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) { |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1653 | union { |
| 1654 | float F; |
| 1655 | uint32_t I; |
| 1656 | }; |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1657 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1658 | F = CDS->getElementAsFloat(i); |
| 1659 | if (AP.isVerbose()) |
| 1660 | AP.OutStreamer.GetCommentOS() << "float " << F << '\n'; |
| 1661 | AP.OutStreamer.EmitIntValue(I, 4, AddrSpace); |
| 1662 | } |
Chris Lattner | 6e64c38 | 2012-01-30 05:49:43 +0000 | [diff] [blame] | 1663 | } else { |
| 1664 | assert(CDS->getElementType()->isDoubleTy()); |
| 1665 | for (unsigned i = 0, e = CDS->getNumElements(); i != e; ++i) { |
| 1666 | union { |
| 1667 | double F; |
| 1668 | uint64_t I; |
| 1669 | }; |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1670 | |
Chris Lattner | 6e64c38 | 2012-01-30 05:49:43 +0000 | [diff] [blame] | 1671 | F = CDS->getElementAsDouble(i); |
| 1672 | if (AP.isVerbose()) |
| 1673 | AP.OutStreamer.GetCommentOS() << "double " << F << '\n'; |
| 1674 | AP.OutStreamer.EmitIntValue(I, 8, AddrSpace); |
| 1675 | } |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1676 | } |
| 1677 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1678 | const DataLayout &TD = *AP.TM.getDataLayout(); |
Chris Lattner | 6e64c38 | 2012-01-30 05:49:43 +0000 | [diff] [blame] | 1679 | unsigned Size = TD.getTypeAllocSize(CDS->getType()); |
| 1680 | unsigned EmittedSize = TD.getTypeAllocSize(CDS->getType()->getElementType()) * |
| 1681 | CDS->getNumElements(); |
| 1682 | if (unsigned Padding = Size - EmittedSize) |
| 1683 | AP.OutStreamer.EmitZeros(Padding, AddrSpace); |
| 1684 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1685 | } |
| 1686 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1687 | static void emitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace, |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1688 | AsmPrinter &AP) { |
Chris Lattner | 18c7f80 | 2012-02-05 02:29:43 +0000 | [diff] [blame] | 1689 | // See if we can aggregate some values. Make sure it can be |
| 1690 | // represented as a series of bytes of the constant value. |
| 1691 | int Value = isRepeatedByteSequence(CA, AP.TM); |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1692 | |
Chris Lattner | 18c7f80 | 2012-02-05 02:29:43 +0000 | [diff] [blame] | 1693 | if (Value != -1) { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1694 | uint64_t Bytes = AP.TM.getDataLayout()->getTypeAllocSize(CA->getType()); |
Chris Lattner | 18c7f80 | 2012-02-05 02:29:43 +0000 | [diff] [blame] | 1695 | AP.OutStreamer.EmitFill(Bytes, Value, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1696 | } |
Chris Lattner | 18c7f80 | 2012-02-05 02:29:43 +0000 | [diff] [blame] | 1697 | else { |
| 1698 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1699 | emitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP); |
Chris Lattner | 18c7f80 | 2012-02-05 02:29:43 +0000 | [diff] [blame] | 1700 | } |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1701 | } |
| 1702 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1703 | static void emitGlobalConstantVector(const ConstantVector *CV, |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1704 | unsigned AddrSpace, AsmPrinter &AP) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1705 | for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1706 | emitGlobalConstantImpl(CV->getOperand(i), AddrSpace, AP); |
Nick Lewycky | 5b7ac14 | 2011-06-22 18:55:03 +0000 | [diff] [blame] | 1707 | |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1708 | const DataLayout &TD = *AP.TM.getDataLayout(); |
Nick Lewycky | 5b7ac14 | 2011-06-22 18:55:03 +0000 | [diff] [blame] | 1709 | unsigned Size = TD.getTypeAllocSize(CV->getType()); |
| 1710 | unsigned EmittedSize = TD.getTypeAllocSize(CV->getType()->getElementType()) * |
| 1711 | CV->getType()->getNumElements(); |
| 1712 | if (unsigned Padding = Size - EmittedSize) |
| 1713 | AP.OutStreamer.EmitZeros(Padding, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1714 | } |
| 1715 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1716 | static void emitGlobalConstantStruct(const ConstantStruct *CS, |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1717 | unsigned AddrSpace, AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1718 | // Print the fields in successive locations. Pad to align if needed! |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1719 | const DataLayout *TD = AP.TM.getDataLayout(); |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1720 | unsigned Size = TD->getTypeAllocSize(CS->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1721 | const StructLayout *Layout = TD->getStructLayout(CS->getType()); |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1722 | uint64_t SizeSoFar = 0; |
| 1723 | for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1724 | const Constant *Field = CS->getOperand(i); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1725 | |
| 1726 | // Check if padding is needed and insert one or more 0s. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1727 | uint64_t FieldSize = TD->getTypeAllocSize(Field->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1728 | uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1)) |
| 1729 | - Layout->getElementOffset(i)) - FieldSize; |
| 1730 | SizeSoFar += FieldSize + PadSize; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1731 | |
| 1732 | // Now print the actual field value. |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1733 | emitGlobalConstantImpl(Field, AddrSpace, AP); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1734 | |
| 1735 | // Insert padding - this may include padding to increase the size of the |
| 1736 | // current field up to the ABI size (if the struct is not packed) as well |
| 1737 | // as padding to ensure that the next field starts at the right offset. |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1738 | AP.OutStreamer.EmitZeros(PadSize, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1739 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1740 | assert(SizeSoFar == Layout->getSizeInBytes() && |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1741 | "Layout of constant struct may be incorrect!"); |
| 1742 | } |
| 1743 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1744 | static void emitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace, |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1745 | AsmPrinter &AP) { |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1746 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
Tim Northover | 5f2801b | 2013-01-11 10:36:13 +0000 | [diff] [blame] | 1747 | |
| 1748 | // First print a comment with what we think the original floating-point value |
| 1749 | // should have been. |
| 1750 | if (AP.isVerbose()) { |
| 1751 | SmallString<8> StrVal; |
| 1752 | CFP->getValueAPF().toString(StrVal); |
| 1753 | |
| 1754 | CFP->getType()->print(AP.OutStreamer.GetCommentOS()); |
| 1755 | AP.OutStreamer.GetCommentOS() << ' ' << StrVal << '\n'; |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1756 | } |
Tim Northover | 5f2801b | 2013-01-11 10:36:13 +0000 | [diff] [blame] | 1757 | |
| 1758 | // Now iterate through the APInt chunks, emitting them in endian-correct |
| 1759 | // order, possibly with a smaller chunk at beginning/end (e.g. for x87 80-bit |
| 1760 | // floats). |
| 1761 | unsigned NumBytes = API.getBitWidth() / 8; |
| 1762 | unsigned TrailingBytes = NumBytes % sizeof(uint64_t); |
| 1763 | const uint64_t *p = API.getRawData(); |
| 1764 | |
| 1765 | // PPC's long double has odd notions of endianness compared to how LLVM |
| 1766 | // handles it: p[0] goes first for *big* endian on PPC. |
| 1767 | if (AP.TM.getDataLayout()->isBigEndian() != CFP->getType()->isPPC_FP128Ty()) { |
| 1768 | int Chunk = API.getNumWords() - 1; |
| 1769 | |
| 1770 | if (TrailingBytes) |
| 1771 | AP.OutStreamer.EmitIntValue(p[Chunk--], TrailingBytes, AddrSpace); |
| 1772 | |
| 1773 | for (; Chunk >= 0; --Chunk) |
| 1774 | AP.OutStreamer.EmitIntValue(p[Chunk], sizeof(uint64_t), AddrSpace); |
| 1775 | } else { |
| 1776 | unsigned Chunk; |
| 1777 | for (Chunk = 0; Chunk < NumBytes / sizeof(uint64_t); ++Chunk) |
| 1778 | AP.OutStreamer.EmitIntValue(p[Chunk], sizeof(uint64_t), AddrSpace); |
| 1779 | |
| 1780 | if (TrailingBytes) |
| 1781 | AP.OutStreamer.EmitIntValue(p[Chunk], TrailingBytes, AddrSpace); |
| 1782 | } |
| 1783 | |
| 1784 | // Emit the tail padding for the long double. |
| 1785 | const DataLayout &TD = *AP.TM.getDataLayout(); |
| 1786 | AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) - |
| 1787 | TD.getTypeStoreSize(CFP->getType()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1788 | } |
| 1789 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1790 | static void emitGlobalConstantLargeInt(const ConstantInt *CI, |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1791 | unsigned AddrSpace, AsmPrinter &AP) { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1792 | const DataLayout *TD = AP.TM.getDataLayout(); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1793 | unsigned BitWidth = CI->getBitWidth(); |
Chris Lattner | 38c2b0a | 2010-01-13 04:39:46 +0000 | [diff] [blame] | 1794 | assert((BitWidth & 63) == 0 && "only support multiples of 64-bits"); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1795 | |
| 1796 | // We don't expect assemblers to support integer data directives |
| 1797 | // for more than 64 bits, so we emit the data in at most 64-bit |
| 1798 | // quantities at a time. |
| 1799 | const uint64_t *RawData = CI->getValue().getRawData(); |
| 1800 | for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1801 | uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i]; |
| 1802 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1803 | } |
| 1804 | } |
| 1805 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1806 | static void emitGlobalConstantImpl(const Constant *CV, unsigned AddrSpace, |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1807 | AsmPrinter &AP) { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1808 | const DataLayout *TD = AP.TM.getDataLayout(); |
Bill Wendling | 21e42d0 | 2012-03-20 08:56:43 +0000 | [diff] [blame] | 1809 | uint64_t Size = TD->getTypeAllocSize(CV->getType()); |
| 1810 | if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1811 | return AP.OutStreamer.EmitZeros(Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1812 | |
| 1813 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1814 | switch (Size) { |
| 1815 | case 1: |
| 1816 | case 2: |
| 1817 | case 4: |
| 1818 | case 8: |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1819 | if (AP.isVerbose()) |
Benjamin Kramer | 41a9649 | 2011-11-05 08:57:40 +0000 | [diff] [blame] | 1820 | AP.OutStreamer.GetCommentOS() << format("0x%" PRIx64 "\n", |
| 1821 | CI->getZExtValue()); |
Bill Wendling | 3d7ff08 | 2010-08-18 18:41:13 +0000 | [diff] [blame] | 1822 | AP.OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1823 | return; |
| 1824 | default: |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1825 | emitGlobalConstantLargeInt(CI, AddrSpace, AP); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1826 | return; |
| 1827 | } |
| 1828 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1829 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1830 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1831 | return emitGlobalConstantFP(CFP, AddrSpace, AP); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1832 | |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1833 | if (isa<ConstantPointerNull>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1834 | AP.OutStreamer.EmitIntValue(0, Size, AddrSpace); |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1835 | return; |
| 1836 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1837 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1838 | if (const ConstantDataSequential *CDS = dyn_cast<ConstantDataSequential>(CV)) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1839 | return emitGlobalConstantDataSequential(CDS, AddrSpace, AP); |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1840 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1841 | if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1842 | return emitGlobalConstantArray(CVA, AddrSpace, AP); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1843 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1844 | if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1845 | return emitGlobalConstantStruct(CVS, AddrSpace, AP); |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1846 | |
Bill Wendling | 21e42d0 | 2012-03-20 08:56:43 +0000 | [diff] [blame] | 1847 | if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) { |
| 1848 | // Look through bitcasts, which might not be able to be MCExpr'ized (e.g. of |
| 1849 | // vectors). |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1850 | if (CE->getOpcode() == Instruction::BitCast) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1851 | return emitGlobalConstantImpl(CE->getOperand(0), AddrSpace, AP); |
Bill Wendling | 21e42d0 | 2012-03-20 08:56:43 +0000 | [diff] [blame] | 1852 | |
| 1853 | if (Size > 8) { |
| 1854 | // If the constant expression's size is greater than 64-bits, then we have |
| 1855 | // to emit the value in chunks. Try to constant fold the value and emit it |
| 1856 | // that way. |
| 1857 | Constant *New = ConstantFoldConstantExpression(CE, TD); |
| 1858 | if (New && New != CE) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1859 | return emitGlobalConstantImpl(New, AddrSpace, AP); |
Bill Wendling | 21e42d0 | 2012-03-20 08:56:43 +0000 | [diff] [blame] | 1860 | } |
| 1861 | } |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1862 | |
Chris Lattner | 9e631da | 2012-01-24 09:31:43 +0000 | [diff] [blame] | 1863 | if (const ConstantVector *V = dyn_cast<ConstantVector>(CV)) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1864 | return emitGlobalConstantVector(V, AddrSpace, AP); |
Eric Christopher | dcc675a | 2012-11-20 20:34:44 +0000 | [diff] [blame] | 1865 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1866 | // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it |
| 1867 | // thread the streamer with EmitValue. |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1868 | AP.OutStreamer.EmitValue(lowerConstant(CV, AP), Size, AddrSpace); |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1869 | } |
| 1870 | |
| 1871 | /// EmitGlobalConstant - Print a general LLVM constant to the .s file. |
| 1872 | void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) { |
Micah Villmow | 3574eca | 2012-10-08 16:38:25 +0000 | [diff] [blame] | 1873 | uint64_t Size = TM.getDataLayout()->getTypeAllocSize(CV->getType()); |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1874 | if (Size) |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1875 | emitGlobalConstantImpl(CV, AddrSpace, *this); |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1876 | else if (MAI->hasSubsectionsViaSymbols()) { |
| 1877 | // If the global has zero size, emit a single byte so that two labels don't |
| 1878 | // look like they are at the same location. |
| 1879 | OutStreamer.EmitIntValue(0, 1, AddrSpace); |
| 1880 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1881 | } |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1882 | |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 1883 | void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) { |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1884 | // Target doesn't support this yet! |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1885 | llvm_unreachable("Target does not support EmitMachineConstantPoolValue"); |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1886 | } |
| 1887 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1888 | void AsmPrinter::printOffset(int64_t Offset, raw_ostream &OS) const { |
| 1889 | if (Offset > 0) |
| 1890 | OS << '+' << Offset; |
| 1891 | else if (Offset < 0) |
| 1892 | OS << Offset; |
| 1893 | } |
| 1894 | |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1895 | //===----------------------------------------------------------------------===// |
| 1896 | // Symbol Lowering Routines. |
| 1897 | //===----------------------------------------------------------------------===// |
| 1898 | |
| 1899 | /// GetTempSymbol - Return the MCSymbol corresponding to the assembler |
| 1900 | /// temporary label with the specified stem and unique ID. |
| 1901 | MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name, unsigned ID) const { |
Chris Lattner | af8df26 | 2010-04-04 19:28:59 +0000 | [diff] [blame] | 1902 | return OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1903 | Name + Twine(ID)); |
| 1904 | } |
| 1905 | |
| 1906 | /// GetTempSymbol - Return an assembler temporary label with the specified |
| 1907 | /// stem. |
| 1908 | MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name) const { |
| 1909 | return OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix())+ |
| 1910 | Name); |
| 1911 | } |
| 1912 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1913 | |
Chris Lattner | 9517554 | 2010-02-08 23:10:08 +0000 | [diff] [blame] | 1914 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const { |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1915 | return MMI->getAddrLabelSymbol(BA->getBasicBlock()); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1916 | } |
| 1917 | |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1918 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const { |
| 1919 | return MMI->getAddrLabelSymbol(BB); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1920 | } |
| 1921 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1922 | /// GetCPISymbol - Return the symbol for the specified constant pool entry. |
| 1923 | MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1924 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1925 | (Twine(MAI->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber()) |
| 1926 | + "_" + Twine(CPID)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1927 | } |
| 1928 | |
| 1929 | /// GetJTISymbol - Return the symbol for the specified jump table entry. |
Bill Wendling | 07d3177 | 2010-06-29 22:34:52 +0000 | [diff] [blame] | 1930 | MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const { |
| 1931 | return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate); |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1932 | } |
| 1933 | |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1934 | /// GetJTSetSymbol - Return the symbol for the specified jump table .set |
| 1935 | /// FIXME: privatize to AsmPrinter. |
| 1936 | MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1937 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1938 | (Twine(MAI->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" + |
| 1939 | Twine(UID) + "_set_" + Twine(MBBID)); |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1940 | } |
| 1941 | |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1942 | /// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1943 | /// global value name as its base, with the specified suffix, and where the |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1944 | /// symbol is forced to have private linkage if ForcePrivate is true. |
| 1945 | MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV, |
| 1946 | StringRef Suffix, |
| 1947 | bool ForcePrivate) const { |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1948 | SmallString<60> NameStr; |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1949 | Mang->getNameWithPrefix(NameStr, GV, ForcePrivate); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1950 | NameStr.append(Suffix.begin(), Suffix.end()); |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1951 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1952 | } |
| 1953 | |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1954 | /// GetExternalSymbolSymbol - Return the MCSymbol for the specified |
| 1955 | /// ExternalSymbol. |
| 1956 | MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const { |
| 1957 | SmallString<60> NameStr; |
| 1958 | Mang->getNameWithPrefix(NameStr, Sym); |
| 1959 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1960 | } |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1961 | |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1962 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1963 | |
| 1964 | /// PrintParentLoopComment - Print comments about parent loops of this one. |
| 1965 | static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1966 | unsigned FunctionNumber) { |
| 1967 | if (Loop == 0) return; |
| 1968 | PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber); |
| 1969 | OS.indent(Loop->getLoopDepth()*2) |
| 1970 | << "Parent Loop BB" << FunctionNumber << "_" |
| 1971 | << Loop->getHeader()->getNumber() |
| 1972 | << " Depth=" << Loop->getLoopDepth() << '\n'; |
| 1973 | } |
| 1974 | |
| 1975 | |
| 1976 | /// PrintChildLoopComment - Print comments about child loops within |
| 1977 | /// the loop for this basic block, with nesting. |
| 1978 | static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1979 | unsigned FunctionNumber) { |
| 1980 | // Add child loop information |
| 1981 | for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){ |
| 1982 | OS.indent((*CL)->getLoopDepth()*2) |
| 1983 | << "Child Loop BB" << FunctionNumber << "_" |
| 1984 | << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth() |
| 1985 | << '\n'; |
| 1986 | PrintChildLoopComment(OS, *CL, FunctionNumber); |
| 1987 | } |
| 1988 | } |
| 1989 | |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 1990 | /// emitBasicBlockLoopComments - Pretty-print comments for basic blocks. |
| 1991 | static void emitBasicBlockLoopComments(const MachineBasicBlock &MBB, |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1992 | const MachineLoopInfo *LI, |
| 1993 | const AsmPrinter &AP) { |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1994 | // Add loop depth information |
| 1995 | const MachineLoop *Loop = LI->getLoopFor(&MBB); |
| 1996 | if (Loop == 0) return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1997 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1998 | MachineBasicBlock *Header = Loop->getHeader(); |
| 1999 | assert(Header && "No header for loop"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2000 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 2001 | // If this block is not a loop header, just print out what is the loop header |
| 2002 | // and return. |
| 2003 | if (Header != &MBB) { |
| 2004 | AP.OutStreamer.AddComment(" in Loop: Header=BB" + |
| 2005 | Twine(AP.getFunctionNumber())+"_" + |
| 2006 | Twine(Loop->getHeader()->getNumber())+ |
| 2007 | " Depth="+Twine(Loop->getLoopDepth())); |
| 2008 | return; |
| 2009 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2010 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 2011 | // Otherwise, it is a loop header. Print out information about child and |
| 2012 | // parent loops. |
| 2013 | raw_ostream &OS = AP.OutStreamer.GetCommentOS(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2014 | |
| 2015 | PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber()); |
| 2016 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 2017 | OS << "=>"; |
| 2018 | OS.indent(Loop->getLoopDepth()*2-2); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2019 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 2020 | OS << "This "; |
| 2021 | if (Loop->empty()) |
| 2022 | OS << "Inner "; |
| 2023 | OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n'; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2024 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 2025 | PrintChildLoopComment(OS, Loop, AP.getFunctionNumber()); |
| 2026 | } |
| 2027 | |
| 2028 | |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 2029 | /// EmitBasicBlockStart - This method prints the label for the specified |
| 2030 | /// MachineBasicBlock, an alignment (if present) and a comment describing |
| 2031 | /// it if appropriate. |
Chris Lattner | 662316c | 2009-09-14 03:15:54 +0000 | [diff] [blame] | 2032 | void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const { |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 2033 | // Emit an alignment directive for this block, if needed. |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 2034 | if (unsigned Align = MBB->getAlignment()) |
Jakob Stoklund Olesen | 8c741b8 | 2011-12-06 01:26:19 +0000 | [diff] [blame] | 2035 | EmitAlignment(Align); |
Evan Cheng | fb8075d | 2008-02-28 00:43:03 +0000 | [diff] [blame] | 2036 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 2037 | // If the block has its address taken, emit any labels that were used to |
| 2038 | // reference the block. It is possible that there is more than one label |
| 2039 | // here, because multiple LLVM BB's may have been RAUW'd to this block after |
| 2040 | // the references were generated. |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 2041 | if (MBB->hasAddressTaken()) { |
Chris Lattner | 213168b | 2010-01-20 07:24:05 +0000 | [diff] [blame] | 2042 | const BasicBlock *BB = MBB->getBasicBlock(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 2043 | if (isVerbose()) |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 2044 | OutStreamer.AddComment("Block address taken"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2045 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 2046 | std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB); |
| 2047 | |
| 2048 | for (unsigned i = 0, e = Syms.size(); i != e; ++i) |
| 2049 | OutStreamer.EmitLabel(Syms[i]); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 2050 | } |
| 2051 | |
Jakob Stoklund Olesen | c511c28 | 2012-03-06 22:27:13 +0000 | [diff] [blame] | 2052 | // Print some verbose block comments. |
| 2053 | if (isVerbose()) { |
| 2054 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 2055 | if (BB->hasName()) |
| 2056 | OutStreamer.AddComment("%" + BB->getName()); |
Chad Rosier | c53ade2 | 2012-09-07 18:16:38 +0000 | [diff] [blame] | 2057 | emitBasicBlockLoopComments(*MBB, LI, *this); |
Jakob Stoklund Olesen | c511c28 | 2012-03-06 22:27:13 +0000 | [diff] [blame] | 2058 | } |
| 2059 | |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 2060 | // Print the main label for the block. |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2061 | if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 2062 | if (isVerbose() && OutStreamer.hasRawTextSupport()) { |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 2063 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
| 2064 | OutStreamer.EmitRawText(Twine(MAI->getCommentString()) + " BB#" + |
| 2065 | Twine(MBB->getNumber()) + ":"); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 2066 | } |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 2067 | } else { |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 2068 | OutStreamer.EmitLabel(MBB->getSymbol()); |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 2069 | } |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 2070 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 2071 | |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 2072 | void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility, |
| 2073 | bool IsDefinition) const { |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2074 | MCSymbolAttr Attr = MCSA_Invalid; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2075 | |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2076 | switch (Visibility) { |
| 2077 | default: break; |
| 2078 | case GlobalValue::HiddenVisibility: |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 2079 | if (IsDefinition) |
| 2080 | Attr = MAI->getHiddenVisibilityAttr(); |
| 2081 | else |
| 2082 | Attr = MAI->getHiddenDeclarationVisibilityAttr(); |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2083 | break; |
| 2084 | case GlobalValue::ProtectedVisibility: |
| 2085 | Attr = MAI->getProtectedVisibilityAttr(); |
| 2086 | break; |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 2087 | } |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2088 | |
| 2089 | if (Attr != MCSA_Invalid) |
| 2090 | OutStreamer.EmitSymbolAttribute(Sym, Attr); |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 2091 | } |
| 2092 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2093 | /// isBlockOnlyReachableByFallthough - Return true if the basic block has |
| 2094 | /// exactly one predecessor and the control transfer mechanism between |
| 2095 | /// the predecessor and this block is a fall-through. |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 2096 | bool AsmPrinter:: |
| 2097 | isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const { |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2098 | // If this is a landing pad, it isn't a fall through. If it has no preds, |
| 2099 | // then nothing falls through to it. |
| 2100 | if (MBB->isLandingPad() || MBB->pred_empty()) |
| 2101 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2102 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2103 | // If there isn't exactly one predecessor, it can't be a fall through. |
| 2104 | MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI; |
| 2105 | ++PI2; |
| 2106 | if (PI2 != MBB->pred_end()) |
| 2107 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2108 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2109 | // The predecessor has to be immediately before this block. |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2110 | MachineBasicBlock *Pred = *PI; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2111 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2112 | if (!Pred->isLayoutSuccessor(MBB)) |
| 2113 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2114 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2115 | // If the block is completely empty, then it definitely does fall through. |
| 2116 | if (Pred->empty()) |
| 2117 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2118 | |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2119 | // Check the terminators in the previous blocks |
| 2120 | for (MachineBasicBlock::iterator II = Pred->getFirstTerminator(), |
| 2121 | IE = Pred->end(); II != IE; ++II) { |
| 2122 | MachineInstr &MI = *II; |
| 2123 | |
| 2124 | // If it is not a simple branch, we are in a table somewhere. |
Evan Cheng | 5a96b3d | 2011-12-07 07:15:52 +0000 | [diff] [blame] | 2125 | if (!MI.isBranch() || MI.isIndirectBranch()) |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2126 | return false; |
| 2127 | |
| 2128 | // If we are the operands of one of the branches, this is not |
| 2129 | // a fall through. |
| 2130 | for (MachineInstr::mop_iterator OI = MI.operands_begin(), |
| 2131 | OE = MI.operands_end(); OI != OE; ++OI) { |
| 2132 | const MachineOperand& OP = *OI; |
Rafael Espindola | aeb6da4 | 2011-06-15 21:00:28 +0000 | [diff] [blame] | 2133 | if (OP.isJTI()) |
| 2134 | return false; |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2135 | if (OP.isMBB() && OP.getMBB() == MBB) |
| 2136 | return false; |
| 2137 | } |
| 2138 | } |
| 2139 | |
| 2140 | return true; |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2141 | } |
| 2142 | |
| 2143 | |
| 2144 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2145 | GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) { |
| 2146 | if (!S->usesMetadata()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2147 | return 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 2148 | |
| 2149 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
| 2150 | gcp_map_type::iterator GCPI = GCMap.find(S); |
| 2151 | if (GCPI != GCMap.end()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2152 | return GCPI->second; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2153 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2154 | const char *Name = S->getName().c_str(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2155 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2156 | for (GCMetadataPrinterRegistry::iterator |
| 2157 | I = GCMetadataPrinterRegistry::begin(), |
| 2158 | E = GCMetadataPrinterRegistry::end(); I != E; ++I) |
| 2159 | if (strcmp(Name, I->getName()) == 0) { |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2160 | GCMetadataPrinter *GMP = I->instantiate(); |
| 2161 | GMP->S = S; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 2162 | GCMap.insert(std::make_pair(S, GMP)); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2163 | return GMP; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2164 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2165 | |
Chris Lattner | 75361b6 | 2010-04-07 22:58:41 +0000 | [diff] [blame] | 2166 | report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name)); |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2167 | } |