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" |
Chris Lattner | 450de39 | 2005-11-10 18:36:17 +0000 | [diff] [blame] | 18 | #include "llvm/Module.h" |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 19 | #include "llvm/CodeGen/GCMetadataPrinter.h" |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 20 | #include "llvm/CodeGen/MachineConstantPool.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 21 | #include "llvm/CodeGen/MachineFrameInfo.h" |
David Greene | fe37ab3 | 2009-08-18 19:22:55 +0000 | [diff] [blame] | 22 | #include "llvm/CodeGen/MachineFunction.h" |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 23 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 24 | #include "llvm/CodeGen/MachineLoopInfo.h" |
Chris Lattner | 84bc542 | 2007-12-31 04:13:23 +0000 | [diff] [blame] | 25 | #include "llvm/CodeGen/MachineModuleInfo.h" |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 26 | #include "llvm/Analysis/ConstantFolding.h" |
Argyrios Kyrtzidis | cd76240 | 2009-05-07 13:55:51 +0000 | [diff] [blame] | 27 | #include "llvm/Analysis/DebugInfo.h" |
Chris Lattner | 736e31d | 2010-04-04 18:34:07 +0000 | [diff] [blame] | 28 | #include "llvm/MC/MCAsmInfo.h" |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 29 | #include "llvm/MC/MCContext.h" |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 30 | #include "llvm/MC/MCExpr.h" |
David Greene | 3ac1ab8 | 2009-07-16 22:24:20 +0000 | [diff] [blame] | 31 | #include "llvm/MC/MCInst.h" |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 32 | #include "llvm/MC/MCSection.h" |
| 33 | #include "llvm/MC/MCStreamer.h" |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 34 | #include "llvm/MC/MCSymbol.h" |
Chris Lattner | 45111d1 | 2010-01-16 21:57:06 +0000 | [diff] [blame] | 35 | #include "llvm/Target/Mangler.h" |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 36 | #include "llvm/Target/TargetAsmInfo.h" |
Owen Anderson | 07000c6 | 2006-05-12 06:33:49 +0000 | [diff] [blame] | 37 | #include "llvm/Target/TargetData.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 38 | #include "llvm/Target/TargetInstrInfo.h" |
Chris Lattner | 0336fdb | 2006-10-06 22:50:56 +0000 | [diff] [blame] | 39 | #include "llvm/Target/TargetLowering.h" |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 40 | #include "llvm/Target/TargetLoweringObjectFile.h" |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame^] | 41 | #include "llvm/Target/TargetOptions.h" |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 42 | #include "llvm/Target/TargetRegisterInfo.h" |
Chris Lattner | 9fc5cdf | 2011-01-02 22:09:33 +0000 | [diff] [blame] | 43 | #include "llvm/Assembly/Writer.h" |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 44 | #include "llvm/ADT/SmallString.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 45 | #include "llvm/ADT/Statistic.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 46 | #include "llvm/Support/ErrorHandling.h" |
| 47 | #include "llvm/Support/Format.h" |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 48 | #include "llvm/Support/Timer.h" |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 49 | using namespace llvm; |
| 50 | |
Chris Lattner | c0561f2 | 2010-04-07 18:10:38 +0000 | [diff] [blame] | 51 | static const char *DWARFGroupName = "DWARF Emission"; |
| 52 | static const char *DbgTimerName = "DWARF Debug Writer"; |
| 53 | static const char *EHTimerName = "DWARF Exception Writer"; |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 54 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 55 | STATISTIC(EmittedInsts, "Number of machine instrs printed"); |
| 56 | |
Devang Patel | 1997473 | 2007-05-03 01:11:54 +0000 | [diff] [blame] | 57 | char AsmPrinter::ID = 0; |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 58 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 59 | typedef DenseMap<GCStrategy*,GCMetadataPrinter*> gcp_map_type; |
| 60 | static gcp_map_type &getGCMap(void *&P) { |
| 61 | if (P == 0) |
| 62 | P = new gcp_map_type(); |
| 63 | return *(gcp_map_type*)P; |
| 64 | } |
| 65 | |
| 66 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 67 | /// getGVAlignmentLog2 - Return the alignment to use for the specified global |
| 68 | /// value in log2 form. This rounds up to the preferred alignment if possible |
| 69 | /// and legal. |
| 70 | static unsigned getGVAlignmentLog2(const GlobalValue *GV, const TargetData &TD, |
| 71 | unsigned InBits = 0) { |
| 72 | unsigned NumBits = 0; |
| 73 | if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV)) |
| 74 | NumBits = TD.getPreferredAlignmentLog(GVar); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 75 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 76 | // If InBits is specified, round it to it. |
| 77 | if (InBits > NumBits) |
| 78 | NumBits = InBits; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 79 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 80 | // If the GV has a specified alignment, take it into account. |
| 81 | if (GV->getAlignment() == 0) |
| 82 | return NumBits; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 83 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 84 | unsigned GVAlign = Log2_32(GV->getAlignment()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 85 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 86 | // If the GVAlign is larger than NumBits, or if we are required to obey |
| 87 | // NumBits because the GV has an assigned section, obey it. |
| 88 | if (GVAlign > NumBits || GV->hasSection()) |
| 89 | NumBits = GVAlign; |
| 90 | return NumBits; |
| 91 | } |
| 92 | |
| 93 | |
| 94 | |
| 95 | |
Chris Lattner | b23569a | 2010-04-04 08:18:47 +0000 | [diff] [blame] | 96 | AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer) |
Owen Anderson | 90c579d | 2010-08-06 18:33:48 +0000 | [diff] [blame] | 97 | : MachineFunctionPass(ID), |
Chris Lattner | 9d1c1ad | 2010-04-04 18:06:11 +0000 | [diff] [blame] | 98 | TM(tm), MAI(tm.getMCAsmInfo()), |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 99 | OutContext(Streamer.getContext()), |
| 100 | OutStreamer(Streamer), |
Devang Patel | 553881b | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 101 | LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) { |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 102 | DD = 0; DE = 0; MMI = 0; LI = 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 103 | GCMetadataPrinters = 0; |
Chris Lattner | 56591ab | 2010-02-02 23:37:42 +0000 | [diff] [blame] | 104 | VerboseAsm = Streamer.isVerboseAsm(); |
Evan Cheng | 42bf74b | 2009-03-25 01:47:28 +0000 | [diff] [blame] | 105 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 106 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 107 | AsmPrinter::~AsmPrinter() { |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 108 | assert(DD == 0 && DE == 0 && "Debug/EH info didn't get finalized"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 109 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 110 | if (GCMetadataPrinters != 0) { |
| 111 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 112 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 113 | for (gcp_map_type::iterator I = GCMap.begin(), E = GCMap.end(); I != E; ++I) |
| 114 | delete I->second; |
| 115 | delete &GCMap; |
| 116 | GCMetadataPrinters = 0; |
| 117 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 118 | |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 119 | delete &OutStreamer; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 120 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 121 | |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 122 | /// getFunctionNumber - Return a unique ID for the current function. |
| 123 | /// |
| 124 | unsigned AsmPrinter::getFunctionNumber() const { |
| 125 | return MF->getFunctionNumber(); |
| 126 | } |
| 127 | |
Dan Gohman | 0d805c3 | 2010-04-17 16:44:48 +0000 | [diff] [blame] | 128 | const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const { |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 129 | return TM.getTargetLowering()->getObjFileLowering(); |
| 130 | } |
| 131 | |
Chris Lattner | d38fee8 | 2010-04-05 00:13:49 +0000 | [diff] [blame] | 132 | |
| 133 | /// getTargetData - Return information about data layout. |
| 134 | const TargetData &AsmPrinter::getTargetData() const { |
| 135 | return *TM.getTargetData(); |
| 136 | } |
| 137 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 138 | /// getCurrentSection() - Return the current section we are emitting to. |
| 139 | const MCSection *AsmPrinter::getCurrentSection() const { |
| 140 | return OutStreamer.getCurrentSection(); |
| 141 | } |
| 142 | |
| 143 | |
Chris Lattner | d38fee8 | 2010-04-05 00:13:49 +0000 | [diff] [blame] | 144 | |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 145 | void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const { |
Dan Gohman | 845012e | 2009-07-31 23:37:33 +0000 | [diff] [blame] | 146 | AU.setPreservesAll(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 147 | MachineFunctionPass::getAnalysisUsage(AU); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 148 | AU.addRequired<MachineModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 149 | AU.addRequired<GCModuleInfo>(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 150 | if (isVerbose()) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 151 | AU.addRequired<MachineLoopInfo>(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 152 | } |
| 153 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 154 | bool AsmPrinter::doInitialization(Module &M) { |
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 | |
Chris Lattner | b87c305 | 2010-03-12 20:47:28 +0000 | [diff] [blame] | 162 | Mang = new Mangler(OutContext, *TM.getTargetData()); |
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 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 192 | if (MAI->doesSupportExceptionHandling()) |
Anton Korobeynikov | 3965b5e | 2011-01-14 21:58:08 +0000 | [diff] [blame] | 193 | switch (MAI->getExceptionHandlingType()) { |
| 194 | default: |
| 195 | case ExceptionHandling::DwarfTable: |
| 196 | DE = new DwarfTableException(this); |
| 197 | break; |
| 198 | case ExceptionHandling::DwarfCFI: |
| 199 | DE = new DwarfCFIException(this); |
| 200 | break; |
Anton Korobeynikov | b5e16af | 2011-03-05 18:43:15 +0000 | [diff] [blame] | 201 | case ExceptionHandling::ARM: |
| 202 | DE = new ARMException(this); |
| 203 | break; |
Anton Korobeynikov | 3965b5e | 2011-01-14 21:58:08 +0000 | [diff] [blame] | 204 | } |
Devang Patel | 14a55d9 | 2009-06-19 21:54:26 +0000 | [diff] [blame] | 205 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 206 | return false; |
| 207 | } |
| 208 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 209 | void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 210 | switch ((GlobalValue::LinkageTypes)Linkage) { |
| 211 | case GlobalValue::CommonLinkage: |
| 212 | case GlobalValue::LinkOnceAnyLinkage: |
| 213 | case GlobalValue::LinkOnceODRLinkage: |
| 214 | case GlobalValue::WeakAnyLinkage: |
| 215 | case GlobalValue::WeakODRLinkage: |
Bill Wendling | 5e721d7 | 2010-07-01 21:55:59 +0000 | [diff] [blame] | 216 | case GlobalValue::LinkerPrivateWeakLinkage: |
Bill Wendling | 55ae515 | 2010-08-20 22:05:50 +0000 | [diff] [blame] | 217 | case GlobalValue::LinkerPrivateWeakDefAutoLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 218 | if (MAI->getWeakDefDirective() != 0) { |
| 219 | // .globl _foo |
| 220 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Bill Wendling | 55ae515 | 2010-08-20 22:05:50 +0000 | [diff] [blame] | 221 | |
| 222 | if ((GlobalValue::LinkageTypes)Linkage != |
| 223 | GlobalValue::LinkerPrivateWeakDefAutoLinkage) |
| 224 | // .weak_definition _foo |
| 225 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition); |
| 226 | else |
| 227 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate); |
Duncan Sands | 5b1b3b7 | 2010-05-12 07:11:33 +0000 | [diff] [blame] | 228 | } else if (MAI->getLinkOnceDirective() != 0) { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 229 | // .globl _foo |
| 230 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Duncan Sands | 5b1b3b7 | 2010-05-12 07:11:33 +0000 | [diff] [blame] | 231 | //NOTE: linkonce is handled by the section the symbol was assigned to. |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 232 | } else { |
| 233 | // .weak _foo |
| 234 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak); |
| 235 | } |
| 236 | break; |
| 237 | case GlobalValue::DLLExportLinkage: |
| 238 | case GlobalValue::AppendingLinkage: |
| 239 | // FIXME: appending linkage variables should go into a section of |
| 240 | // their name or something. For now, just emit them as external. |
| 241 | case GlobalValue::ExternalLinkage: |
| 242 | // If external or appending, declare as a global symbol. |
| 243 | // .globl _foo |
| 244 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 245 | break; |
| 246 | case GlobalValue::PrivateLinkage: |
| 247 | case GlobalValue::InternalLinkage: |
Bill Wendling | eabd735 | 2010-07-01 22:38:24 +0000 | [diff] [blame] | 248 | case GlobalValue::LinkerPrivateLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 249 | break; |
| 250 | default: |
| 251 | llvm_unreachable("Unknown linkage type!"); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 256 | /// EmitGlobalVariable - Emit the specified global variable to the .s file. |
| 257 | void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 258 | if (GV->hasInitializer()) { |
| 259 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 260 | if (EmitSpecialLLVMGlobal(GV)) |
| 261 | return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 262 | |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 263 | if (isVerbose()) { |
| 264 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 265 | /*PrintType=*/false, GV->getParent()); |
| 266 | OutStreamer.GetCommentOS() << '\n'; |
| 267 | } |
Eric Christopher | 04386ca | 2010-05-25 21:49:43 +0000 | [diff] [blame] | 268 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 269 | |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 270 | MCSymbol *GVSym = Mang->getSymbol(GV); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 271 | EmitVisibility(GVSym, GV->getVisibility()); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 272 | |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 273 | if (!GV->hasInitializer()) // External globals require no extra code. |
| 274 | return; |
| 275 | |
Chris Lattner | a800f7c | 2010-01-25 18:33:40 +0000 | [diff] [blame] | 276 | if (MAI->hasDotTypeDotSizeDirective()) |
| 277 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 278 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 279 | SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); |
| 280 | |
| 281 | const TargetData *TD = TM.getTargetData(); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 282 | uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 283 | |
Chris Lattner | 567dd1f | 2010-04-26 18:46:46 +0000 | [diff] [blame] | 284 | // If the alignment is specified, we *must* obey it. Overaligning a global |
| 285 | // with a specified alignment is a prompt way to break globals emitted to |
| 286 | // sections and expected to be contiguous (e.g. ObjC metadata). |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 287 | unsigned AlignLog = getGVAlignmentLog2(GV, *TD); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 288 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 289 | // Handle common and BSS local symbols (.lcomm). |
| 290 | if (GVKind.isCommon() || GVKind.isBSSLocal()) { |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 291 | if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 292 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 293 | // Handle common symbols. |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 294 | if (GVKind.isCommon()) { |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 295 | unsigned Align = 1 << AlignLog; |
| 296 | if (!getObjFileLowering().getCommDirectiveSupportsAlignment()) |
| 297 | Align = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 298 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 299 | // .comm _foo, 42, 4 |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 300 | OutStreamer.EmitCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 301 | return; |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 302 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 303 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 304 | // Handle local BSS symbols. |
| 305 | if (MAI->hasMachoZeroFillDirective()) { |
| 306 | const MCSection *TheSection = |
| 307 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 308 | // .zerofill __DATA, __bss, _foo, 400, 5 |
| 309 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 310 | return; |
| 311 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 312 | |
Chris Lattner | 9eb158d | 2010-01-23 07:47:02 +0000 | [diff] [blame] | 313 | if (MAI->hasLCOMMDirective()) { |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 314 | // .lcomm _foo, 42 |
Chris Lattner | 9eb158d | 2010-01-23 07:47:02 +0000 | [diff] [blame] | 315 | OutStreamer.EmitLocalCommonSymbol(GVSym, Size); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 316 | return; |
| 317 | } |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 318 | |
| 319 | unsigned Align = 1 << AlignLog; |
| 320 | if (!getObjFileLowering().getCommDirectiveSupportsAlignment()) |
| 321 | Align = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 322 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 323 | // .local _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 324 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 325 | // .comm _foo, 42, 4 |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 326 | OutStreamer.EmitCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 327 | return; |
| 328 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 329 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 330 | const MCSection *TheSection = |
| 331 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 332 | |
| 333 | // Handle the zerofill directive on darwin, which is a special form of BSS |
| 334 | // emission. |
| 335 | if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) { |
Chris Lattner | 4c4d0c0 | 2010-04-27 07:41:44 +0000 | [diff] [blame] | 336 | if (Size == 0) Size = 1; // zerofill of 0 bytes is undefined. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 337 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 338 | // .globl _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 339 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 340 | // .zerofill __DATA, __common, _foo, 400, 5 |
| 341 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 342 | return; |
| 343 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 344 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 345 | // Handle thread local data for mach-o which requires us to output an |
| 346 | // additional structure of data and mangle the original symbol so that we |
| 347 | // can reference it later. |
Chris Lattner | dfe254b | 2010-09-05 20:33:40 +0000 | [diff] [blame] | 348 | // |
| 349 | // TODO: This should become an "emit thread local global" method on TLOF. |
| 350 | // All of this macho specific stuff should be sunk down into TLOFMachO and |
| 351 | // stuff like "TLSExtraDataSection" should no longer be part of the parent |
| 352 | // TLOF class. This will also make it more obvious that stuff like |
| 353 | // MCStreamer::EmitTBSSSymbol is macho specific and only called from macho |
| 354 | // specific code. |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 355 | if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) { |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 356 | // Emit the .tbss symbol |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 357 | MCSymbol *MangSym = |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 358 | OutContext.GetOrCreateSymbol(GVSym->getName() + Twine("$tlv$init")); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 359 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 360 | if (GVKind.isThreadBSS()) |
| 361 | OutStreamer.EmitTBSSSymbol(TheSection, MangSym, Size, 1 << AlignLog); |
| 362 | else if (GVKind.isThreadData()) { |
| 363 | OutStreamer.SwitchSection(TheSection); |
| 364 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 365 | EmitAlignment(AlignLog, GV); |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 366 | OutStreamer.EmitLabel(MangSym); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 367 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 368 | EmitGlobalConstant(GV->getInitializer()); |
| 369 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 370 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 371 | OutStreamer.AddBlankLine(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 372 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 373 | // Emit the variable struct for the runtime. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 374 | const MCSection *TLVSect |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 375 | = getObjFileLowering().getTLSExtraDataSection(); |
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.SwitchSection(TLVSect); |
| 378 | // Emit the linkage here. |
| 379 | EmitLinkage(GV->getLinkage(), GVSym); |
| 380 | OutStreamer.EmitLabel(GVSym); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 381 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 382 | // Three pointers in size: |
| 383 | // - __tlv_bootstrap - used to make sure support exists |
| 384 | // - spare pointer, used when mapped by the runtime |
| 385 | // - pointer to mangled symbol above with initializer |
| 386 | unsigned PtrSize = TD->getPointerSizeInBits()/8; |
Eric Christopher | 7310064 | 2010-06-03 04:02:59 +0000 | [diff] [blame] | 387 | OutStreamer.EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"), |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 388 | PtrSize, 0); |
| 389 | OutStreamer.EmitIntValue(0, PtrSize, 0); |
| 390 | OutStreamer.EmitSymbolValue(MangSym, PtrSize, 0); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 391 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 392 | OutStreamer.AddBlankLine(); |
Eric Christopher | c1a887d | 2010-05-20 00:49:07 +0000 | [diff] [blame] | 393 | return; |
| 394 | } |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 395 | |
| 396 | OutStreamer.SwitchSection(TheSection); |
| 397 | |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 398 | EmitLinkage(GV->getLinkage(), GVSym); |
Chris Lattner | f74e25f | 2010-04-26 18:30:45 +0000 | [diff] [blame] | 399 | EmitAlignment(AlignLog, GV); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 400 | |
Chris Lattner | 4c8c668 | 2010-01-19 06:41:24 +0000 | [diff] [blame] | 401 | OutStreamer.EmitLabel(GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 402 | |
| 403 | EmitGlobalConstant(GV->getInitializer()); |
| 404 | |
| 405 | if (MAI->hasDotTypeDotSizeDirective()) |
Chris Lattner | 1947f24 | 2010-01-25 07:53:05 +0000 | [diff] [blame] | 406 | // .size foo, 42 |
Chris Lattner | 99328ad | 2010-01-25 07:52:13 +0000 | [diff] [blame] | 407 | OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext)); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 408 | |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 409 | OutStreamer.AddBlankLine(); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 410 | } |
| 411 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 412 | /// EmitFunctionHeader - This method emits the header for the current |
| 413 | /// function. |
| 414 | void AsmPrinter::EmitFunctionHeader() { |
| 415 | // Print out constants referenced by the function |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 416 | EmitConstantPool(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 417 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 418 | // Print the 'header' of function. |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 419 | const Function *F = MF->getFunction(); |
| 420 | |
| 421 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM)); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 422 | EmitVisibility(CurrentFnSym, F->getVisibility()); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 423 | |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 424 | EmitLinkage(F->getLinkage(), CurrentFnSym); |
Chris Lattner | b406a81 | 2010-01-26 23:41:48 +0000 | [diff] [blame] | 425 | EmitAlignment(MF->getAlignment(), F); |
| 426 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 427 | if (MAI->hasDotTypeDotSizeDirective()) |
| 428 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction); |
| 429 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 430 | if (isVerbose()) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 431 | WriteAsOperand(OutStreamer.GetCommentOS(), F, |
| 432 | /*PrintType=*/false, F->getParent()); |
| 433 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 434 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 435 | |
Dan Gohman | f451cb8 | 2010-02-10 16:03:48 +0000 | [diff] [blame] | 436 | // Emit the CurrentFnSym. This is a virtual function to allow targets to |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 437 | // do their wild and crazy things as required. |
| 438 | EmitFunctionEntryLabel(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 439 | |
Chris Lattner | 9cc0da9 | 2010-03-15 20:39:00 +0000 | [diff] [blame] | 440 | // If the function had address-taken blocks that got deleted, then we have |
| 441 | // references to the dangling symbols. Emit them at the start of the function |
| 442 | // so that we don't get references to undefined symbols. |
| 443 | std::vector<MCSymbol*> DeadBlockSyms; |
| 444 | MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms); |
| 445 | for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) { |
| 446 | OutStreamer.AddComment("Address taken block that was later removed"); |
| 447 | OutStreamer.EmitLabel(DeadBlockSyms[i]); |
| 448 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 449 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 450 | // Add some workaround for linkonce linkage on Cygwin\MinGW. |
| 451 | if (MAI->getLinkOnceDirective() != 0 && |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 452 | (F->hasLinkOnceLinkage() || F->hasWeakLinkage())) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 453 | // FIXME: What is this? |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 454 | MCSymbol *FakeStub = |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 455 | OutContext.GetOrCreateSymbol(Twine("Lllvm$workaround$fake$stub$")+ |
| 456 | CurrentFnSym->getName()); |
| 457 | OutStreamer.EmitLabel(FakeStub); |
| 458 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 459 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 460 | // Emit pre-function debug and/or EH information. |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 461 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 462 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 463 | DE->BeginFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 464 | } |
| 465 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 466 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 467 | DD->beginFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 468 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 469 | } |
| 470 | |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 471 | /// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the |
| 472 | /// function. This can be overridden by targets as required to do custom stuff. |
| 473 | void AsmPrinter::EmitFunctionEntryLabel() { |
Chris Lattner | b4202db | 2010-05-06 00:05:37 +0000 | [diff] [blame] | 474 | // The function label could have already been emitted if two symbols end up |
| 475 | // conflicting due to asm renaming. Detect this and emit an error. |
| 476 | if (CurrentFnSym->isUndefined()) |
| 477 | return OutStreamer.EmitLabel(CurrentFnSym); |
| 478 | |
| 479 | report_fatal_error("'" + Twine(CurrentFnSym->getName()) + |
| 480 | "' label emitted multiple times to assembly file"); |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 481 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 482 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 483 | |
Devang Patel | e025e96 | 2010-06-29 22:29:15 +0000 | [diff] [blame] | 484 | /// EmitComments - Pretty-print comments for instructions. |
| 485 | static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) { |
| 486 | const MachineFunction *MF = MI.getParent()->getParent(); |
| 487 | const TargetMachine &TM = MF->getTarget(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 488 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 489 | // Check for spills and reloads |
| 490 | int FI; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 491 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 492 | const MachineFrameInfo *FrameInfo = MF->getFrameInfo(); |
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 | // We assume a single instruction only has a spill or reload, not |
| 495 | // both. |
| 496 | const MachineMemOperand *MMO; |
| 497 | if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) { |
| 498 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 499 | MMO = *MI.memoperands_begin(); |
| 500 | CommentOS << MMO->getSize() << "-byte Reload\n"; |
| 501 | } |
| 502 | } else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) { |
| 503 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 504 | CommentOS << MMO->getSize() << "-byte Folded Reload\n"; |
| 505 | } else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) { |
| 506 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 507 | MMO = *MI.memoperands_begin(); |
| 508 | CommentOS << MMO->getSize() << "-byte Spill\n"; |
| 509 | } |
| 510 | } else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) { |
| 511 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 512 | CommentOS << MMO->getSize() << "-byte Folded Spill\n"; |
| 513 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 514 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 515 | // Check for spill-induced copies |
Jakob Stoklund Olesen | 04c528a | 2010-07-16 04:45:42 +0000 | [diff] [blame] | 516 | if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse)) |
| 517 | CommentOS << " Reload Reuse\n"; |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 518 | } |
| 519 | |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 520 | /// EmitImplicitDef - This method emits the specified machine instruction |
| 521 | /// that is an implicit def. |
| 522 | static void EmitImplicitDef(const MachineInstr *MI, AsmPrinter &AP) { |
| 523 | unsigned RegNo = MI->getOperand(0).getReg(); |
| 524 | AP.OutStreamer.AddComment(Twine("implicit-def: ") + |
| 525 | AP.TM.getRegisterInfo()->getName(RegNo)); |
| 526 | AP.OutStreamer.AddBlankLine(); |
| 527 | } |
| 528 | |
| 529 | static void EmitKill(const MachineInstr *MI, AsmPrinter &AP) { |
| 530 | std::string Str = "kill:"; |
| 531 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 532 | const MachineOperand &Op = MI->getOperand(i); |
| 533 | assert(Op.isReg() && "KILL instruction must have only register operands"); |
| 534 | Str += ' '; |
| 535 | Str += AP.TM.getRegisterInfo()->getName(Op.getReg()); |
| 536 | Str += (Op.isDef() ? "<def>" : "<kill>"); |
| 537 | } |
| 538 | AP.OutStreamer.AddComment(Str); |
| 539 | AP.OutStreamer.AddBlankLine(); |
| 540 | } |
| 541 | |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 542 | /// EmitDebugValueComment - This method handles the target-independent form |
| 543 | /// of DBG_VALUE, returning true if it was able to do so. A false return |
| 544 | /// means the target will need to handle MI in EmitInstruction. |
| 545 | static bool EmitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) { |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 546 | // This code handles only the 3-operand target-independent form. |
| 547 | if (MI->getNumOperands() != 3) |
| 548 | return false; |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 549 | |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 550 | SmallString<128> Str; |
| 551 | raw_svector_ostream OS(Str); |
| 552 | OS << '\t' << AP.MAI->getCommentString() << "DEBUG_VALUE: "; |
| 553 | |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 554 | // cast away const; DIetc do not take const operands for some reason. |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 555 | DIVariable V(const_cast<MDNode*>(MI->getOperand(2).getMetadata())); |
Devang Patel | 67a444c | 2010-04-29 18:52:10 +0000 | [diff] [blame] | 556 | if (V.getContext().isSubprogram()) |
Devang Patel | 2db49d7 | 2010-05-07 18:11:54 +0000 | [diff] [blame] | 557 | OS << DISubprogram(V.getContext()).getDisplayName() << ":"; |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 558 | OS << V.getName() << " <- "; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 559 | |
| 560 | // Register or immediate value. Register 0 means undef. |
| 561 | if (MI->getOperand(0).isFPImm()) { |
| 562 | APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF()); |
| 563 | if (MI->getOperand(0).getFPImm()->getType()->isFloatTy()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 564 | OS << (double)APF.convertToFloat(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 565 | } else if (MI->getOperand(0).getFPImm()->getType()->isDoubleTy()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 566 | OS << APF.convertToDouble(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 567 | } else { |
| 568 | // There is no good way to print long double. Convert a copy to |
| 569 | // double. Ah well, it's only a comment. |
| 570 | bool ignored; |
| 571 | APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 572 | &ignored); |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 573 | OS << "(long double) " << APF.convertToDouble(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 574 | } |
| 575 | } else if (MI->getOperand(0).isImm()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 576 | OS << MI->getOperand(0).getImm(); |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 577 | } else { |
| 578 | assert(MI->getOperand(0).isReg() && "Unknown operand type"); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 579 | if (MI->getOperand(0).getReg() == 0) { |
| 580 | // Suppress offset, it is not meaningful here. |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 581 | OS << "undef"; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 582 | // 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] | 583 | AP.OutStreamer.EmitRawText(OS.str()); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 584 | return true; |
| 585 | } |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 586 | OS << AP.TM.getRegisterInfo()->getName(MI->getOperand(0).getReg()); |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 587 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 588 | |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 589 | OS << '+' << MI->getOperand(1).getImm(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 590 | // 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] | 591 | AP.OutStreamer.EmitRawText(OS.str()); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 592 | return true; |
| 593 | } |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 594 | |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame^] | 595 | bool AsmPrinter::needsCFIMoves() { |
| 596 | if (UnwindTablesMandatory) |
| 597 | return true; |
| 598 | |
| 599 | if (MMI->hasDebugInfo() && !MAI->doesDwarfRequireFrameSection()) |
| 600 | return true; |
| 601 | |
| 602 | if (MF->getFunction()->doesNotThrow()) |
| 603 | return false; |
| 604 | |
| 605 | return true; |
| 606 | } |
| 607 | |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 608 | void AsmPrinter::emitPrologLabel(const MachineInstr &MI) { |
| 609 | MCSymbol *Label = MI.getOperand(0).getMCSymbol(); |
Rafael Espindola | fea8fea | 2011-04-26 19:26:53 +0000 | [diff] [blame] | 610 | |
| 611 | if (MAI->doesDwarfRequireFrameSection() || |
| 612 | MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI) |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 613 | OutStreamer.EmitLabel(Label); |
Rafael Espindola | fea8fea | 2011-04-26 19:26:53 +0000 | [diff] [blame] | 614 | |
| 615 | if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI) |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 616 | return; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 617 | |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame^] | 618 | if (!needsCFIMoves()) |
| 619 | return; |
| 620 | |
| 621 | MachineModuleInfo &MMI = MF->getMMI(); |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 622 | std::vector<MachineMove> &Moves = MMI.getFrameMoves(); |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 623 | bool FoundOne = false; |
| 624 | (void)FoundOne; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 625 | for (std::vector<MachineMove>::iterator I = Moves.begin(), |
| 626 | E = Moves.end(); I != E; ++I) { |
| 627 | if (I->getLabel() == Label) { |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 628 | EmitCFIFrameMove(*I); |
| 629 | FoundOne = true; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 630 | } |
| 631 | } |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 632 | assert(FoundOne); |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 633 | } |
| 634 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 635 | /// EmitFunctionBody - This method emits the body and trailer for a |
| 636 | /// function. |
| 637 | void AsmPrinter::EmitFunctionBody() { |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 638 | // Emit target-specific gunk before the function body. |
| 639 | EmitFunctionBodyStart(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 640 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 641 | bool ShouldPrintDebugScopes = DD && MMI->hasDebugInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 642 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 643 | // Print out code for the function. |
| 644 | bool HasAnyRealCode = false; |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 645 | const MachineInstr *LastMI = 0; |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 646 | for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); |
| 647 | I != E; ++I) { |
| 648 | // Print a label for the basic block. |
| 649 | EmitBasicBlockStart(I); |
| 650 | for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); |
| 651 | II != IE; ++II) { |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 652 | LastMI = II; |
| 653 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 654 | // Print the assembly for the instruction. |
Dale Johannesen | d014761 | 2010-05-01 16:41:11 +0000 | [diff] [blame] | 655 | if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() && |
| 656 | !II->isDebugValue()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 657 | HasAnyRealCode = true; |
Evan Cheng | ed33b13 | 2010-04-27 19:38:45 +0000 | [diff] [blame] | 658 | ++EmittedInsts; |
| 659 | } |
| 660 | |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 661 | if (ShouldPrintDebugScopes) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 662 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Devang Patel | cbbe287 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 663 | DD->beginInstruction(II); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 664 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 665 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 666 | if (isVerbose()) |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 667 | EmitComments(*II, OutStreamer.GetCommentOS()); |
| 668 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 669 | switch (II->getOpcode()) { |
Bill Wendling | 7431bea | 2010-07-16 22:20:36 +0000 | [diff] [blame] | 670 | case TargetOpcode::PROLOG_LABEL: |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 671 | emitPrologLabel(*II); |
| 672 | break; |
| 673 | |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 674 | case TargetOpcode::EH_LABEL: |
| 675 | case TargetOpcode::GC_LABEL: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 676 | OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol()); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 677 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 678 | case TargetOpcode::INLINEASM: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 679 | EmitInlineAsm(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 680 | break; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 681 | case TargetOpcode::DBG_VALUE: |
| 682 | if (isVerbose()) { |
| 683 | if (!EmitDebugValueComment(II, *this)) |
| 684 | EmitInstruction(II); |
| 685 | } |
| 686 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 687 | case TargetOpcode::IMPLICIT_DEF: |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 688 | if (isVerbose()) EmitImplicitDef(II, *this); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 689 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 690 | case TargetOpcode::KILL: |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 691 | if (isVerbose()) EmitKill(II, *this); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 692 | break; |
| 693 | default: |
| 694 | EmitInstruction(II); |
| 695 | break; |
| 696 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 697 | |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 698 | if (ShouldPrintDebugScopes) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 699 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Devang Patel | cbbe287 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 700 | DD->endInstruction(II); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 701 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 702 | } |
| 703 | } |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 704 | |
| 705 | // If the last instruction was a prolog label, then we have a situation where |
| 706 | // we emitted a prolog but no function body. This results in the ending prolog |
| 707 | // label equaling the end of function label and an invalid "row" in the |
| 708 | // FDE. We need to emit a noop in this situation so that the FDE's rows are |
| 709 | // valid. |
Bill Wendling | 7490896 | 2010-07-17 19:18:44 +0000 | [diff] [blame] | 710 | bool RequiresNoop = LastMI && LastMI->isPrologLabel(); |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 711 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 712 | // 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] | 713 | // 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] | 714 | // labels from collapsing together. Just emit a noop. |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 715 | if ((MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) || RequiresNoop) { |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 716 | MCInst Noop; |
| 717 | TM.getInstrInfo()->getNoopForMachoTarget(Noop); |
Chris Lattner | d61647d | 2010-04-26 23:41:43 +0000 | [diff] [blame] | 718 | if (Noop.getOpcode()) { |
| 719 | OutStreamer.AddComment("avoids zero-length function"); |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 720 | OutStreamer.EmitInstruction(Noop); |
Chris Lattner | d61647d | 2010-04-26 23:41:43 +0000 | [diff] [blame] | 721 | } else // Target not mc-ized yet. |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 722 | OutStreamer.EmitRawText(StringRef("\tnop\n")); |
| 723 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 724 | |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 725 | // Emit target-specific gunk after the function body. |
| 726 | EmitFunctionBodyEnd(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 727 | |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 728 | // If the target wants a .size directive for the size of the function, emit |
| 729 | // it. |
| 730 | if (MAI->hasDotTypeDotSizeDirective()) { |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 731 | // Create a symbol for the end of function, so we can get the size as |
| 732 | // difference between the function label and the temp label. |
| 733 | MCSymbol *FnEndLabel = OutContext.CreateTempSymbol(); |
| 734 | OutStreamer.EmitLabel(FnEndLabel); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 735 | |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 736 | const MCExpr *SizeExp = |
| 737 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext), |
| 738 | MCSymbolRefExpr::Create(CurrentFnSym, OutContext), |
| 739 | OutContext); |
| 740 | OutStreamer.EmitELFSize(CurrentFnSym, SizeExp); |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 741 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 742 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 743 | // Emit post-function debug information. |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 744 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 745 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 746 | DD->endFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 747 | } |
| 748 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 749 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 750 | DE->EndFunction(); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 751 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 752 | MMI->EndFunction(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 753 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 754 | // Print out jump tables referenced by the function. |
| 755 | EmitJumpTableInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 756 | |
Chris Lattner | d26a80f | 2010-02-03 01:49:49 +0000 | [diff] [blame] | 757 | OutStreamer.AddBlankLine(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 758 | } |
| 759 | |
Devang Patel | 28ff35d | 2010-04-28 01:39:28 +0000 | [diff] [blame] | 760 | /// getDebugValueLocation - Get location information encoded by DBG_VALUE |
| 761 | /// operands. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 762 | MachineLocation AsmPrinter:: |
| 763 | getDebugValueLocation(const MachineInstr *MI) const { |
Devang Patel | 28ff35d | 2010-04-28 01:39:28 +0000 | [diff] [blame] | 764 | // Target specific DBG_VALUE instructions are handled by each target. |
| 765 | return MachineLocation(); |
| 766 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 767 | |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 768 | /// getDwarfRegOpSize - get size required to emit given machine location using |
| 769 | /// dwarf encoding. |
| 770 | unsigned AsmPrinter::getDwarfRegOpSize(const MachineLocation &MLoc) const { |
| 771 | const TargetRegisterInfo *RI = TM.getRegisterInfo(); |
| 772 | unsigned DWReg = RI->getDwarfRegNum(MLoc.getReg(), false); |
| 773 | if (int Offset = MLoc.getOffset()) { |
| 774 | // If the value is at a certain offset from frame register then |
| 775 | // use DW_OP_breg. |
| 776 | if (DWReg < 32) |
| 777 | return 1 + MCAsmInfo::getSLEB128Size(Offset); |
| 778 | else |
| 779 | return 1 + MCAsmInfo::getULEB128Size(MLoc.getReg()) |
| 780 | + MCAsmInfo::getSLEB128Size(Offset); |
| 781 | } |
| 782 | if (DWReg < 32) |
| 783 | return 1; |
| 784 | |
| 785 | return 1 + MCAsmInfo::getULEB128Size(DWReg); |
| 786 | } |
| 787 | |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 788 | /// EmitDwarfRegOp - Emit dwarf register operation. |
Devang Patel | 0be77df | 2011-04-27 20:29:27 +0000 | [diff] [blame] | 789 | void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 790 | const TargetRegisterInfo *TRI = TM.getRegisterInfo(); |
| 791 | unsigned Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 792 | if (int Offset = MLoc.getOffset()) { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 793 | if (Reg < 32) { |
| 794 | OutStreamer.AddComment( |
| 795 | dwarf::OperationEncodingString(dwarf::DW_OP_breg0 + Reg)); |
| 796 | EmitInt8(dwarf::DW_OP_breg0 + Reg); |
| 797 | } else { |
| 798 | OutStreamer.AddComment("DW_OP_bregx"); |
| 799 | EmitInt8(dwarf::DW_OP_bregx); |
| 800 | OutStreamer.AddComment(Twine(Reg)); |
| 801 | EmitULEB128(Reg); |
| 802 | } |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 803 | EmitSLEB128(Offset); |
| 804 | } else { |
| 805 | if (Reg < 32) { |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 806 | OutStreamer.AddComment( |
| 807 | dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg)); |
| 808 | EmitInt8(dwarf::DW_OP_reg0 + Reg); |
| 809 | } else { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 810 | OutStreamer.AddComment("DW_OP_regx"); |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 811 | EmitInt8(dwarf::DW_OP_regx); |
| 812 | OutStreamer.AddComment(Twine(Reg)); |
| 813 | EmitULEB128(Reg); |
| 814 | } |
| 815 | } |
| 816 | } |
| 817 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 818 | bool AsmPrinter::doFinalization(Module &M) { |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 819 | // Emit global variables. |
| 820 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 821 | I != E; ++I) |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 822 | EmitGlobalVariable(I); |
Rafael Espindola | 1ffb533 | 2011-01-28 03:20:10 +0000 | [diff] [blame] | 823 | |
| 824 | // Emit visibility info for declarations |
| 825 | for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) { |
| 826 | const Function &F = *I; |
| 827 | if (!F.isDeclaration()) |
| 828 | continue; |
| 829 | GlobalValue::VisibilityTypes V = F.getVisibility(); |
| 830 | if (V == GlobalValue::DefaultVisibility) |
| 831 | continue; |
| 832 | |
| 833 | MCSymbol *Name = Mang->getSymbol(&F); |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 834 | EmitVisibility(Name, V, false); |
Rafael Espindola | 1ffb533 | 2011-01-28 03:20:10 +0000 | [diff] [blame] | 835 | } |
| 836 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 837 | // Finalize debug and EH information. |
| 838 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 839 | { |
| 840 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 841 | DE->EndModule(); |
| 842 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 843 | delete DE; DE = 0; |
| 844 | } |
| 845 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 846 | { |
| 847 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 848 | DD->endModule(); |
| 849 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 850 | delete DD; DD = 0; |
| 851 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 852 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 853 | // If the target wants to know about weak references, print them all. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 854 | if (MAI->getWeakRefDirective()) { |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 855 | // FIXME: This is not lazy, it would be nice to only print weak references |
| 856 | // to stuff that is actually used. Note that doing so would require targets |
| 857 | // to notice uses in operands (due to constant exprs etc). This should |
| 858 | // happen with the MC stuff eventually. |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 859 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 860 | // Print out module-level global variables here. |
| 861 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 862 | I != E; ++I) { |
Chris Lattner | 08ce3b4 | 2010-01-16 18:17:26 +0000 | [diff] [blame] | 863 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 864 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 865 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 866 | |
Chris Lattner | c6fdced | 2009-08-03 23:10:34 +0000 | [diff] [blame] | 867 | 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] | 868 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 869 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 870 | } |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 871 | } |
| 872 | |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 873 | if (MAI->hasSetDirective()) { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 874 | OutStreamer.AddBlankLine(); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 875 | 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] | 876 | I != E; ++I) { |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 877 | MCSymbol *Name = Mang->getSymbol(I); |
Anton Korobeynikov | 325be7c | 2007-09-06 17:21:48 +0000 | [diff] [blame] | 878 | |
| 879 | const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal()); |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 880 | MCSymbol *Target = Mang->getSymbol(GV); |
Anton Korobeynikov | 541af7f | 2008-09-24 22:21:04 +0000 | [diff] [blame] | 881 | |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 882 | if (I->hasExternalLinkage() || !MAI->getWeakRefDirective()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 883 | OutStreamer.EmitSymbolAttribute(Name, MCSA_Global); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 884 | else if (I->hasWeakLinkage()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 885 | OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 886 | else |
Chris Lattner | 1059549 | 2010-01-16 01:37:14 +0000 | [diff] [blame] | 887 | assert(I->hasLocalLinkage() && "Invalid alias linkage"); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 888 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 889 | EmitVisibility(Name, I->getVisibility()); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 890 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 891 | // Emit the directives as assignments aka .set: |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 892 | OutStreamer.EmitAssignment(Name, |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 893 | MCSymbolRefExpr::Create(Target, OutContext)); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 894 | } |
| 895 | } |
| 896 | |
Duncan Sands | 1465d61 | 2009-01-28 13:14:17 +0000 | [diff] [blame] | 897 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 898 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
| 899 | for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; ) |
| 900 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 901 | MP->finishAssembly(*this); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 902 | |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 903 | // If we don't have any trampolines, then we don't require stack memory |
| 904 | // to be executable. Some targets have a directive to declare this. |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 905 | Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline"); |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 906 | if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty()) |
Chris Lattner | 74aae47 | 2010-04-08 21:26:26 +0000 | [diff] [blame] | 907 | if (const MCSection *S = MAI->getNonexecutableStackSection(OutContext)) |
Chris Lattner | f9f93e4 | 2010-01-23 07:21:06 +0000 | [diff] [blame] | 908 | OutStreamer.SwitchSection(S); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 909 | |
Chris Lattner | bd23d5f | 2009-09-18 20:17:03 +0000 | [diff] [blame] | 910 | // Allow the target to emit any magic that it wants at the end of the file, |
| 911 | // after everything else has gone out. |
| 912 | EmitEndOfAsmFile(M); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 913 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 914 | delete Mang; Mang = 0; |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 915 | MMI = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 916 | |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 917 | OutStreamer.Finish(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 918 | return false; |
| 919 | } |
| 920 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 921 | void AsmPrinter::SetupMachineFunction(MachineFunction &MF) { |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 922 | this->MF = &MF; |
Chris Lattner | 412c3a5 | 2010-01-16 01:24:10 +0000 | [diff] [blame] | 923 | // Get the function symbol. |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 924 | CurrentFnSym = Mang->getSymbol(MF.getFunction()); |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 925 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 926 | if (isVerbose()) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 927 | LI = &getAnalysis<MachineLoopInfo>(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 928 | } |
| 929 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 930 | namespace { |
| 931 | // SectionCPs - Keep track the alignment, constpool entries per Section. |
| 932 | struct SectionCPs { |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 933 | const MCSection *S; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 934 | unsigned Alignment; |
| 935 | SmallVector<unsigned, 4> CPEs; |
Douglas Gregor | cabdd74 | 2009-12-19 07:05:23 +0000 | [diff] [blame] | 936 | SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {} |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 937 | }; |
| 938 | } |
| 939 | |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 940 | /// EmitConstantPool - Print to the current output stream assembly |
| 941 | /// representations of the constants in the constant pool MCP. This is |
| 942 | /// used to print out constants which have been "spilled to memory" by |
| 943 | /// the code generator. |
| 944 | /// |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 945 | void AsmPrinter::EmitConstantPool() { |
| 946 | const MachineConstantPool *MCP = MF->getConstantPool(); |
Chris Lattner | fa77d43 | 2006-02-09 04:22:52 +0000 | [diff] [blame] | 947 | const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants(); |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 948 | if (CP.empty()) return; |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 949 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 950 | // Calculate sections for constant pool entries. We collect entries to go into |
| 951 | // the same section together to reduce amount of section switch statements. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 952 | SmallVector<SectionCPs, 4> CPSections; |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 953 | for (unsigned i = 0, e = CP.size(); i != e; ++i) { |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 954 | const MachineConstantPoolEntry &CPE = CP[i]; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 955 | unsigned Align = CPE.getAlignment(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 956 | |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 957 | SectionKind Kind; |
| 958 | switch (CPE.getRelocationInfo()) { |
| 959 | default: llvm_unreachable("Unknown section kind"); |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 960 | case 2: Kind = SectionKind::getReadOnlyWithRel(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 961 | case 1: |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 962 | Kind = SectionKind::getReadOnlyWithRelLocal(); |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 963 | break; |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 964 | case 0: |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 965 | switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) { |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 966 | case 4: Kind = SectionKind::getMergeableConst4(); break; |
| 967 | case 8: Kind = SectionKind::getMergeableConst8(); break; |
| 968 | case 16: Kind = SectionKind::getMergeableConst16();break; |
| 969 | default: Kind = SectionKind::getMergeableConst(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 970 | } |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 971 | } |
| 972 | |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 973 | const MCSection *S = getObjFileLowering().getSectionForConstant(Kind); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 974 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 975 | // The number of sections are small, just do a linear search from the |
| 976 | // last section to the first. |
| 977 | bool Found = false; |
| 978 | unsigned SecIdx = CPSections.size(); |
| 979 | while (SecIdx != 0) { |
| 980 | if (CPSections[--SecIdx].S == S) { |
| 981 | Found = true; |
| 982 | break; |
| 983 | } |
| 984 | } |
| 985 | if (!Found) { |
| 986 | SecIdx = CPSections.size(); |
| 987 | CPSections.push_back(SectionCPs(S, Align)); |
| 988 | } |
| 989 | |
| 990 | if (Align > CPSections[SecIdx].Alignment) |
| 991 | CPSections[SecIdx].Alignment = Align; |
| 992 | CPSections[SecIdx].CPEs.push_back(i); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 993 | } |
| 994 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 995 | // Now print stuff into the calculated sections. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 996 | for (unsigned i = 0, e = CPSections.size(); i != e; ++i) { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 997 | OutStreamer.SwitchSection(CPSections[i].S); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 998 | EmitAlignment(Log2_32(CPSections[i].Alignment)); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 999 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1000 | unsigned Offset = 0; |
| 1001 | for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) { |
| 1002 | unsigned CPI = CPSections[i].CPEs[j]; |
| 1003 | MachineConstantPoolEntry CPE = CP[CPI]; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 1004 | |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 1005 | // Emit inter-object padding for alignment. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1006 | unsigned AlignMask = CPE.getAlignment() - 1; |
| 1007 | unsigned NewOffset = (Offset + AlignMask) & ~AlignMask; |
Chris Lattner | aaec205 | 2010-01-19 19:46:13 +0000 | [diff] [blame] | 1008 | OutStreamer.EmitFill(NewOffset - Offset, 0/*fillval*/, 0/*addrspace*/); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1009 | |
| 1010 | const Type *Ty = CPE.getType(); |
Duncan Sands | 777d230 | 2009-05-09 07:06:46 +0000 | [diff] [blame] | 1011 | Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1012 | OutStreamer.EmitLabel(GetCPISymbol(CPI)); |
| 1013 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1014 | if (CPE.isMachineConstantPoolEntry()) |
| 1015 | EmitMachineConstantPoolValue(CPE.Val.MachineCPVal); |
| 1016 | else |
| 1017 | EmitGlobalConstant(CPE.Val.ConstVal); |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 1018 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 1019 | } |
| 1020 | } |
| 1021 | |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1022 | /// EmitJumpTableInfo - Print assembly representations of the jump tables used |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1023 | /// by the current function to the current output stream. |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1024 | /// |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1025 | void AsmPrinter::EmitJumpTableInfo() { |
| 1026 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
Chris Lattner | 44e8725 | 2010-01-25 22:41:33 +0000 | [diff] [blame] | 1027 | if (MJTI == 0) return; |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 1028 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return; |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1029 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 1030 | if (JT.empty()) return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1031 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1032 | // 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] | 1033 | // the appropriate section. |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1034 | const Function *F = MF->getFunction(); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 1035 | bool JTInDiffSection = false; |
Chris Lattner | f1214cb | 2010-01-26 06:53:37 +0000 | [diff] [blame] | 1036 | if (// In PIC mode, we need to emit the jump table to the same section as the |
| 1037 | // function body itself, otherwise the label differences won't make sense. |
| 1038 | // FIXME: Need a better predicate for this: what about custom entries? |
| 1039 | MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 || |
| 1040 | // We should also do if the section name is NULL or function is declared |
| 1041 | // in discardable section |
| 1042 | // FIXME: this isn't the right predicate, should be based on the MCSection |
| 1043 | // for the function. |
| 1044 | F->isWeakForLinker()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1045 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM)); |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1046 | } else { |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 1047 | // Otherwise, drop it in the readonly section. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1048 | const MCSection *ReadOnlySection = |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 1049 | getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly()); |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1050 | OutStreamer.SwitchSection(ReadOnlySection); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 1051 | JTInDiffSection = true; |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1052 | } |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1053 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1054 | EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getTargetData()))); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1055 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1056 | for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) { |
| 1057 | const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1058 | |
| 1059 | // If this jump table was deleted, ignore it. |
Chris Lattner | 0737188 | 2006-10-28 18:10:06 +0000 | [diff] [blame] | 1060 | if (JTBBs.empty()) continue; |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 1061 | |
Chris Lattner | e35df92 | 2010-01-26 05:15:20 +0000 | [diff] [blame] | 1062 | // For the EK_LabelDifference32 entry, if the target supports .set, emit a |
| 1063 | // .set directive for each unique entry. This reduces the number of |
| 1064 | // relocations the assembler will generate for the jump table. |
| 1065 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 && |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 1066 | MAI->hasSetDirective()) { |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1067 | SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets; |
| 1068 | const TargetLowering *TLI = TM.getTargetLowering(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1069 | const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1070 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) { |
| 1071 | const MachineBasicBlock *MBB = JTBBs[ii]; |
| 1072 | if (!EmittedSets.insert(MBB)) continue; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1073 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 1074 | // .set LJTSet, LBB32-base |
| 1075 | const MCExpr *LHS = |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1076 | MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 1077 | OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()), |
| 1078 | MCBinaryExpr::CreateSub(LHS, Base, OutContext)); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1079 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1080 | } |
| 1081 | |
Duncan Sands | ab4c366 | 2011-02-15 09:23:02 +0000 | [diff] [blame] | 1082 | // 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] | 1083 | // before each jump table. The first label is never referenced, but tells |
| 1084 | // the assembler and linker the extents of the jump table object. The |
| 1085 | // second label is actually referenced by the code. |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1086 | if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0]) |
Chris Lattner | beeb93e | 2010-01-26 05:58:28 +0000 | [diff] [blame] | 1087 | // FIXME: This doesn't have to have any specific name, just any randomly |
| 1088 | // named and numbered 'l' label would work. Simplify GetJTISymbol. |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1089 | OutStreamer.EmitLabel(GetJTISymbol(JTI, true)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1090 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1091 | OutStreamer.EmitLabel(GetJTISymbol(JTI)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1092 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1093 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1094 | EmitJumpTableEntry(MJTI, JTBBs[ii], JTI); |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1095 | } |
| 1096 | } |
| 1097 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1098 | /// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the |
| 1099 | /// current stream. |
| 1100 | void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 1101 | const MachineBasicBlock *MBB, |
| 1102 | unsigned UID) const { |
Jakob Stoklund Olesen | e5005d0 | 2011-02-09 21:52:06 +0000 | [diff] [blame] | 1103 | assert(MBB && MBB->getNumber() >= 0 && "Invalid basic block"); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1104 | const MCExpr *Value = 0; |
| 1105 | switch (MJTI->getEntryKind()) { |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 1106 | case MachineJumpTableInfo::EK_Inline: |
| 1107 | llvm_unreachable("Cannot emit EK_Inline jump table entry"); break; |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1108 | case MachineJumpTableInfo::EK_Custom32: |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1109 | Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID, |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1110 | OutContext); |
| 1111 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1112 | case MachineJumpTableInfo::EK_BlockAddress: |
| 1113 | // EK_BlockAddress - Each entry is a plain address of block, e.g.: |
| 1114 | // .word LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1115 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1116 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1117 | case MachineJumpTableInfo::EK_GPRel32BlockAddress: { |
| 1118 | // EK_GPRel32BlockAddress - Each entry is an address of block, encoded |
| 1119 | // with a relocation as gp-relative, e.g.: |
| 1120 | // .gprel32 LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1121 | MCSymbol *MBBSym = MBB->getSymbol(); |
Chris Lattner | 718fb59 | 2010-01-25 21:28:50 +0000 | [diff] [blame] | 1122 | OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext)); |
Chris Lattner | 78f485a | 2010-01-25 21:10:10 +0000 | [diff] [blame] | 1123 | return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1124 | } |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1125 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1126 | case MachineJumpTableInfo::EK_LabelDifference32: { |
| 1127 | // EK_LabelDifference32 - Each entry is the address of the block minus |
| 1128 | // the address of the jump table. This is used for PIC jump tables where |
| 1129 | // gprel32 is not supported. e.g.: |
| 1130 | // .word LBB123 - LJTI1_2 |
| 1131 | // If the .set directive is supported, this is emitted as: |
| 1132 | // .set L4_5_set_123, LBB123 - LJTI1_2 |
| 1133 | // .word L4_5_set_123 |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1134 | |
| 1135 | // If we have emitted set directives for the jump table entries, print |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1136 | // them rather than the entries themselves. If we're emitting PIC, then |
| 1137 | // emit the table entries as differences between two text section labels. |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 1138 | if (MAI->hasSetDirective()) { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1139 | // If we used .set, reference the .set's symbol. |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1140 | Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()), |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1141 | OutContext); |
| 1142 | break; |
| 1143 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 1144 | // Otherwise, use the difference as the jump table entry. |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1145 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1146 | const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1147 | Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext); |
| 1148 | break; |
| 1149 | } |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1150 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1151 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1152 | assert(Value && "Unknown entry kind!"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1153 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1154 | unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData()); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1155 | OutStreamer.EmitValue(Value, EntrySize, /*addrspace*/0); |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1156 | } |
| 1157 | |
| 1158 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1159 | /// EmitSpecialLLVMGlobal - Check to see if the specified global is a |
| 1160 | /// special global used by LLVM. If so, emit it and return true, otherwise |
| 1161 | /// do nothing and return false. |
| 1162 | bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) { |
Daniel Dunbar | 03d7651 | 2009-07-25 23:55:21 +0000 | [diff] [blame] | 1163 | if (GV->getName() == "llvm.used") { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1164 | if (MAI->hasNoDeadStrip()) // No need to emit this at all. |
Andrew Lenharth | b753a9b | 2007-08-22 19:33:11 +0000 | [diff] [blame] | 1165 | EmitLLVMUsedList(GV->getInitializer()); |
| 1166 | return true; |
| 1167 | } |
| 1168 | |
Chris Lattner | 401e10c | 2009-07-20 06:14:25 +0000 | [diff] [blame] | 1169 | // Ignore debug and non-emitted data. This handles llvm.compiler.used. |
Chris Lattner | 266c7bb | 2009-04-13 05:44:34 +0000 | [diff] [blame] | 1170 | if (GV->getSection() == "llvm.metadata" || |
| 1171 | GV->hasAvailableExternallyLinkage()) |
| 1172 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1173 | |
Jim Laskey | 7809811 | 2006-03-07 22:00:35 +0000 | [diff] [blame] | 1174 | if (!GV->hasAppendingLinkage()) return false; |
| 1175 | |
| 1176 | assert(GV->hasInitializer() && "Not a special LLVM global!"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1177 | |
Evan Cheng | 916d07c | 2007-06-04 20:39:18 +0000 | [diff] [blame] | 1178 | const TargetData *TD = TM.getTargetData(); |
| 1179 | unsigned Align = Log2_32(TD->getPointerPrefAlignment()); |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 1180 | if (GV->getName() == "llvm.global_ctors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1181 | OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection()); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1182 | EmitAlignment(Align); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1183 | EmitXXStructorList(GV->getInitializer()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1184 | |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 1185 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1186 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 1187 | StringRef Sym(".constructors_used"); |
| 1188 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 1189 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1190 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1191 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1192 | } |
| 1193 | |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 1194 | if (GV->getName() == "llvm.global_dtors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1195 | OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection()); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1196 | EmitAlignment(Align); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1197 | EmitXXStructorList(GV->getInitializer()); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 1198 | |
| 1199 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1200 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 1201 | StringRef Sym(".destructors_used"); |
| 1202 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 1203 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1204 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1205 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1206 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1207 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1208 | return false; |
| 1209 | } |
| 1210 | |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 1211 | /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each |
Dale Johannesen | d2e51af | 2008-09-09 22:29:13 +0000 | [diff] [blame] | 1212 | /// global in the specified llvm.used list for which emitUsedDirectiveFor |
| 1213 | /// is true, as being used with this directive. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1214 | void AsmPrinter::EmitLLVMUsedList(Constant *List) { |
Dan Gohman | a119de8 | 2009-06-14 23:30:43 +0000 | [diff] [blame] | 1215 | // Should be an array of 'i8*'. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1216 | ConstantArray *InitList = dyn_cast<ConstantArray>(List); |
| 1217 | if (InitList == 0) return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1218 | |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1219 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
Chris Lattner | 16fe990 | 2009-07-17 22:00:23 +0000 | [diff] [blame] | 1220 | const GlobalValue *GV = |
| 1221 | dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts()); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1222 | if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 1223 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip); |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1224 | } |
| 1225 | } |
| 1226 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1227 | /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1228 | /// function pointers, ignoring the init priority. |
| 1229 | void AsmPrinter::EmitXXStructorList(Constant *List) { |
| 1230 | // Should be an array of '{ int, void ()* }' structs. The first value is the |
| 1231 | // init priority, which we ignore. |
| 1232 | if (!isa<ConstantArray>(List)) return; |
| 1233 | ConstantArray *InitList = cast<ConstantArray>(List); |
| 1234 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) |
| 1235 | if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){ |
| 1236 | if (CS->getNumOperands() != 2) return; // Not array of 2-element structs. |
Chris Lattner | 8de324b | 2005-12-21 01:17:37 +0000 | [diff] [blame] | 1237 | |
| 1238 | if (CS->getOperand(1)->isNullValue()) |
| 1239 | return; // Found a null terminator, exit printing. |
| 1240 | // Emit the function pointer. |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1241 | EmitGlobalConstant(CS->getOperand(1)); |
| 1242 | } |
| 1243 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 1244 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1245 | //===--------------------------------------------------------------------===// |
| 1246 | // Emission and print routines |
| 1247 | // |
| 1248 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1249 | /// EmitInt8 - Emit a byte directive and value. |
| 1250 | /// |
| 1251 | void AsmPrinter::EmitInt8(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 1252 | OutStreamer.EmitIntValue(Value, 1, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1253 | } |
| 1254 | |
| 1255 | /// EmitInt16 - Emit a short directive and value. |
| 1256 | /// |
| 1257 | void AsmPrinter::EmitInt16(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 1258 | OutStreamer.EmitIntValue(Value, 2, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1259 | } |
| 1260 | |
| 1261 | /// EmitInt32 - Emit a long directive and value. |
| 1262 | /// |
| 1263 | void AsmPrinter::EmitInt32(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 1264 | OutStreamer.EmitIntValue(Value, 4, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1265 | } |
| 1266 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1267 | /// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size |
| 1268 | /// in bytes of the directive is specified by Size and Hi/Lo specify the |
| 1269 | /// labels. This implicitly uses .set if it is available. |
| 1270 | void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo, |
| 1271 | unsigned Size) const { |
| 1272 | // Get the Hi-Lo expression. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1273 | const MCExpr *Diff = |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1274 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext), |
| 1275 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 1276 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1277 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1278 | if (!MAI->hasSetDirective()) { |
| 1279 | OutStreamer.EmitValue(Diff, Size, 0/*AddrSpace*/); |
| 1280 | return; |
| 1281 | } |
| 1282 | |
| 1283 | // Otherwise, emit with .set (aka assignment). |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1284 | MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1285 | OutStreamer.EmitAssignment(SetLabel, Diff); |
Chris Lattner | 6cde3e6 | 2010-03-09 00:39:24 +0000 | [diff] [blame] | 1286 | OutStreamer.EmitSymbolValue(SetLabel, Size, 0/*AddrSpace*/); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1287 | } |
| 1288 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1289 | /// EmitLabelOffsetDifference - Emit something like ".long Hi+Offset-Lo" |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1290 | /// where the size in bytes of the directive is specified by Size and Hi/Lo |
| 1291 | /// specify the labels. This implicitly uses .set if it is available. |
| 1292 | void AsmPrinter::EmitLabelOffsetDifference(const MCSymbol *Hi, uint64_t Offset, |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1293 | const MCSymbol *Lo, unsigned Size) |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1294 | const { |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1295 | |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1296 | // Emit Hi+Offset - Lo |
| 1297 | // Get the Hi+Offset expression. |
| 1298 | const MCExpr *Plus = |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1299 | MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Hi, OutContext), |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1300 | MCConstantExpr::Create(Offset, OutContext), |
| 1301 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1302 | |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1303 | // Get the Hi+Offset-Lo expression. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1304 | const MCExpr *Diff = |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1305 | MCBinaryExpr::CreateSub(Plus, |
| 1306 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 1307 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1308 | |
| 1309 | if (!MAI->hasSetDirective()) |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1310 | OutStreamer.EmitValue(Diff, 4, 0/*AddrSpace*/); |
| 1311 | else { |
| 1312 | // Otherwise, emit with .set (aka assignment). |
| 1313 | MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++); |
| 1314 | OutStreamer.EmitAssignment(SetLabel, Diff); |
| 1315 | OutStreamer.EmitSymbolValue(SetLabel, 4, 0/*AddrSpace*/); |
| 1316 | } |
| 1317 | } |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1318 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1319 | /// EmitLabelPlusOffset - Emit something like ".long Label+Offset" |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1320 | /// where the size in bytes of the directive is specified by Size and Label |
| 1321 | /// specifies the label. This implicitly uses .set if it is available. |
| 1322 | void AsmPrinter::EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset, |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1323 | unsigned Size) |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1324 | const { |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1325 | |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1326 | // Emit Label+Offset |
| 1327 | const MCExpr *Plus = |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1328 | MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Label, OutContext), |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1329 | MCConstantExpr::Create(Offset, OutContext), |
| 1330 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1331 | |
Devang Patel | a660be7 | 2010-09-02 23:01:10 +0000 | [diff] [blame] | 1332 | OutStreamer.EmitValue(Plus, 4, 0/*AddrSpace*/); |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1333 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1334 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1335 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1336 | //===----------------------------------------------------------------------===// |
| 1337 | |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 1338 | // EmitAlignment - Emit an alignment directive to the specified power of |
| 1339 | // two boundary. For example, if you pass in 3 here, you will get an 8 |
| 1340 | // 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] | 1341 | // an explicit alignment requested, it will override the alignment request |
| 1342 | // if required for correctness. |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 1343 | // |
Chris Lattner | a7b611c | 2010-04-28 01:08:40 +0000 | [diff] [blame] | 1344 | void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const { |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1345 | if (GV) NumBits = getGVAlignmentLog2(GV, *TM.getTargetData(), NumBits); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1346 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1347 | if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1348 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 1349 | if (getCurrentSection()->getKind().isText()) |
Chris Lattner | 2cce371 | 2010-02-23 18:46:22 +0000 | [diff] [blame] | 1350 | OutStreamer.EmitCodeAlignment(1 << NumBits); |
| 1351 | else |
| 1352 | OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0); |
Chris Lattner | bfddc20 | 2004-08-17 19:14:29 +0000 | [diff] [blame] | 1353 | } |
David Greene | a5bb59f | 2009-08-05 21:00:52 +0000 | [diff] [blame] | 1354 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1355 | //===----------------------------------------------------------------------===// |
| 1356 | // Constant emission. |
| 1357 | //===----------------------------------------------------------------------===// |
| 1358 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1359 | /// LowerConstant - Lower the specified LLVM Constant to an MCExpr. |
| 1360 | /// |
| 1361 | static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) { |
| 1362 | MCContext &Ctx = AP.OutContext; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1363 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1364 | if (CV->isNullValue() || isa<UndefValue>(CV)) |
| 1365 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1366 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1367 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) |
| 1368 | return MCConstantExpr::Create(CI->getZExtValue(), Ctx); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1369 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1370 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 1371 | return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx); |
Bill Wendling | 3d7ff08 | 2010-08-18 18:41:13 +0000 | [diff] [blame] | 1372 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1373 | if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) |
| 1374 | return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1375 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1376 | const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV); |
| 1377 | if (CE == 0) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1378 | llvm_unreachable("Unknown constant value to lower!"); |
| 1379 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1380 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1381 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1382 | switch (CE->getOpcode()) { |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1383 | default: |
| 1384 | // If the code isn't optimized, there may be outstanding folding |
| 1385 | // opportunities. Attempt to fold the expression using TargetData as a |
| 1386 | // last resort before giving up. |
Dan Gohman | 54e72ec | 2010-02-08 22:19:11 +0000 | [diff] [blame] | 1387 | if (Constant *C = |
| 1388 | ConstantFoldConstantExpression(CE, AP.TM.getTargetData())) |
| 1389 | if (C != CE) |
| 1390 | return LowerConstant(C, AP); |
Dan Gohman | 9f6a6862 | 2010-08-04 18:51:09 +0000 | [diff] [blame] | 1391 | |
| 1392 | // Otherwise report the problem to the user. |
| 1393 | { |
| 1394 | std::string S; |
| 1395 | raw_string_ostream OS(S); |
| 1396 | OS << "Unsupported expression in static initializer: "; |
| 1397 | WriteAsOperand(OS, CE, /*PrintType=*/false, |
| 1398 | !AP.MF ? 0 : AP.MF->getFunction()->getParent()); |
| 1399 | report_fatal_error(OS.str()); |
| 1400 | } |
| 1401 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1402 | case Instruction::GetElementPtr: { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1403 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1404 | // Generate a symbolic expression for the byte address |
| 1405 | const Constant *PtrVal = CE->getOperand(0); |
| 1406 | SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end()); |
| 1407 | int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), &IdxVec[0], |
| 1408 | IdxVec.size()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1409 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1410 | const MCExpr *Base = LowerConstant(CE->getOperand(0), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1411 | if (Offset == 0) |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1412 | return Base; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1413 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1414 | // Truncate/sext the offset to the pointer size. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1415 | if (TD.getPointerSizeInBits() != 64) { |
| 1416 | int SExtAmount = 64-TD.getPointerSizeInBits(); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1417 | Offset = (Offset << SExtAmount) >> SExtAmount; |
| 1418 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1419 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1420 | return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx), |
| 1421 | Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1422 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1423 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1424 | case Instruction::Trunc: |
| 1425 | // We emit the value and depend on the assembler to truncate the generated |
| 1426 | // expression properly. This is important for differences between |
| 1427 | // blockaddress labels. Since the two labels are in the same function, it |
| 1428 | // is reasonable to treat their delta as a 32-bit value. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1429 | // FALL THROUGH. |
| 1430 | case Instruction::BitCast: |
| 1431 | return LowerConstant(CE->getOperand(0), AP); |
| 1432 | |
| 1433 | case Instruction::IntToPtr: { |
| 1434 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1435 | // Handle casts to pointers by changing them into casts to the appropriate |
| 1436 | // integer type. This promotes constant folding and simplifies this code. |
| 1437 | Constant *Op = CE->getOperand(0); |
| 1438 | Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()), |
| 1439 | false/*ZExt*/); |
| 1440 | return LowerConstant(Op, AP); |
| 1441 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1442 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1443 | case Instruction::PtrToInt: { |
| 1444 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1445 | // Support only foldable casts to/from pointers that can be eliminated by |
| 1446 | // changing the pointer to the appropriately sized integer type. |
| 1447 | Constant *Op = CE->getOperand(0); |
| 1448 | const Type *Ty = CE->getType(); |
| 1449 | |
| 1450 | const MCExpr *OpExpr = LowerConstant(Op, AP); |
| 1451 | |
| 1452 | // We can emit the pointer value into this slot if the slot is an |
| 1453 | // integer slot equal to the size of the pointer. |
| 1454 | if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType())) |
| 1455 | return OpExpr; |
| 1456 | |
| 1457 | // Otherwise the pointer is smaller than the resultant integer, mask off |
| 1458 | // the high bits so we are sure to get a proper truncation if the input is |
| 1459 | // a constant expr. |
| 1460 | unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType()); |
| 1461 | const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx); |
| 1462 | return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx); |
| 1463 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1464 | |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1465 | // The MC library also has a right-shift operator, but it isn't consistently |
| 1466 | // signed or unsigned between different targets. |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1467 | case Instruction::Add: |
| 1468 | case Instruction::Sub: |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1469 | case Instruction::Mul: |
| 1470 | case Instruction::SDiv: |
| 1471 | case Instruction::SRem: |
| 1472 | case Instruction::Shl: |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1473 | case Instruction::And: |
| 1474 | case Instruction::Or: |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1475 | case Instruction::Xor: { |
| 1476 | const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP); |
| 1477 | const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1478 | switch (CE->getOpcode()) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1479 | default: llvm_unreachable("Unknown binary operator constant cast expr"); |
| 1480 | case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx); |
| 1481 | case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx); |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1482 | case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx); |
| 1483 | case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx); |
| 1484 | case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx); |
| 1485 | case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1486 | case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx); |
| 1487 | case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx); |
| 1488 | case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1489 | } |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1490 | } |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 1491 | } |
| 1492 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1493 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1494 | static void EmitGlobalConstantImpl(const Constant *C, unsigned AddrSpace, |
| 1495 | AsmPrinter &AP); |
| 1496 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1497 | static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace, |
| 1498 | AsmPrinter &AP) { |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1499 | if (AddrSpace != 0 || !CA->isString()) { |
| 1500 | // Not a string. Print the values in successive locations |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1501 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1502 | EmitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP); |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1503 | return; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1504 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1505 | |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1506 | // Otherwise, it can be emitted as .ascii. |
| 1507 | SmallVector<char, 128> TmpVec; |
| 1508 | TmpVec.reserve(CA->getNumOperands()); |
| 1509 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1510 | TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue()); |
| 1511 | |
| 1512 | AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1513 | } |
| 1514 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1515 | static void EmitGlobalConstantVector(const ConstantVector *CV, |
| 1516 | unsigned AddrSpace, AsmPrinter &AP) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1517 | for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1518 | EmitGlobalConstantImpl(CV->getOperand(i), AddrSpace, AP); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1519 | } |
| 1520 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1521 | static void EmitGlobalConstantStruct(const ConstantStruct *CS, |
| 1522 | unsigned AddrSpace, AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1523 | // Print the fields in successive locations. Pad to align if needed! |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1524 | const TargetData *TD = AP.TM.getTargetData(); |
| 1525 | unsigned Size = TD->getTypeAllocSize(CS->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1526 | const StructLayout *Layout = TD->getStructLayout(CS->getType()); |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1527 | uint64_t SizeSoFar = 0; |
| 1528 | for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1529 | const Constant *Field = CS->getOperand(i); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1530 | |
| 1531 | // Check if padding is needed and insert one or more 0s. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1532 | uint64_t FieldSize = TD->getTypeAllocSize(Field->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1533 | uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1)) |
| 1534 | - Layout->getElementOffset(i)) - FieldSize; |
| 1535 | SizeSoFar += FieldSize + PadSize; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1536 | |
| 1537 | // Now print the actual field value. |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1538 | EmitGlobalConstantImpl(Field, AddrSpace, AP); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1539 | |
| 1540 | // Insert padding - this may include padding to increase the size of the |
| 1541 | // current field up to the ABI size (if the struct is not packed) as well |
| 1542 | // 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] | 1543 | AP.OutStreamer.EmitZeros(PadSize, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1544 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1545 | assert(SizeSoFar == Layout->getSizeInBytes() && |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1546 | "Layout of constant struct may be incorrect!"); |
| 1547 | } |
| 1548 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1549 | static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace, |
| 1550 | AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1551 | // FP Constants are printed as integer constants to avoid losing |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1552 | // precision. |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1553 | if (CFP->getType()->isDoubleTy()) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1554 | if (AP.isVerbose()) { |
Chris Lattner | d79d9dc | 2010-01-22 19:17:48 +0000 | [diff] [blame] | 1555 | double Val = CFP->getValueAPF().convertToDouble(); |
| 1556 | AP.OutStreamer.GetCommentOS() << "double " << Val << '\n'; |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1557 | } |
| 1558 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1559 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1560 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1561 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1562 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1563 | |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1564 | if (CFP->getType()->isFloatTy()) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1565 | if (AP.isVerbose()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1566 | float Val = CFP->getValueAPF().convertToFloat(); |
| 1567 | AP.OutStreamer.GetCommentOS() << "float " << Val << '\n'; |
Dan Gohman | a12e9d7 | 2009-08-12 18:32:22 +0000 | [diff] [blame] | 1568 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1569 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1570 | AP.OutStreamer.EmitIntValue(Val, 4, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1571 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1572 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1573 | |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1574 | if (CFP->getType()->isX86_FP80Ty()) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1575 | // all long double variants are printed as hex |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 1576 | // API needed to prevent premature destruction |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1577 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1578 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1579 | if (AP.isVerbose()) { |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1580 | // Convert to double so we can print the approximate val as a comment. |
| 1581 | APFloat DoubleVal = CFP->getValueAPF(); |
| 1582 | bool ignored; |
| 1583 | DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 1584 | &ignored); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1585 | AP.OutStreamer.GetCommentOS() << "x86_fp80 ~= " |
| 1586 | << DoubleVal.convertToDouble() << '\n'; |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1587 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1588 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1589 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1590 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
| 1591 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1592 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1593 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1594 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1595 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1596 | |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1597 | // Emit the tail padding for the long double. |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1598 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1599 | AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) - |
| 1600 | TD.getTypeStoreSize(CFP->getType()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1601 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1602 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1603 | |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1604 | assert(CFP->getType()->isPPC_FP128Ty() && |
| 1605 | "Floating point constant type not handled"); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 1606 | // All long double variants are printed as hex |
| 1607 | // API needed to prevent premature destruction. |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1608 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1609 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1610 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1611 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1612 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1613 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1614 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
| 1615 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1616 | } |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1617 | } |
| 1618 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1619 | static void EmitGlobalConstantLargeInt(const ConstantInt *CI, |
| 1620 | unsigned AddrSpace, AsmPrinter &AP) { |
| 1621 | const TargetData *TD = AP.TM.getTargetData(); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1622 | unsigned BitWidth = CI->getBitWidth(); |
Chris Lattner | 38c2b0a | 2010-01-13 04:39:46 +0000 | [diff] [blame] | 1623 | assert((BitWidth & 63) == 0 && "only support multiples of 64-bits"); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1624 | |
| 1625 | // We don't expect assemblers to support integer data directives |
| 1626 | // for more than 64 bits, so we emit the data in at most 64-bit |
| 1627 | // quantities at a time. |
| 1628 | const uint64_t *RawData = CI->getValue().getRawData(); |
| 1629 | for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1630 | uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i]; |
| 1631 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1632 | } |
| 1633 | } |
| 1634 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1635 | static void EmitGlobalConstantImpl(const Constant *CV, unsigned AddrSpace, |
| 1636 | AsmPrinter &AP) { |
Chris Lattner | 043c4e5 | 2010-01-20 07:19:19 +0000 | [diff] [blame] | 1637 | if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1638 | uint64_t Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1639 | return AP.OutStreamer.EmitZeros(Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1640 | } |
| 1641 | |
| 1642 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1643 | unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1644 | switch (Size) { |
| 1645 | case 1: |
| 1646 | case 2: |
| 1647 | case 4: |
| 1648 | case 8: |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1649 | if (AP.isVerbose()) |
| 1650 | AP.OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue()); |
Bill Wendling | 3d7ff08 | 2010-08-18 18:41:13 +0000 | [diff] [blame] | 1651 | AP.OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1652 | return; |
| 1653 | default: |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1654 | EmitGlobalConstantLargeInt(CI, AddrSpace, AP); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1655 | return; |
| 1656 | } |
| 1657 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1658 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1659 | if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1660 | return EmitGlobalConstantArray(CVA, AddrSpace, AP); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1661 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1662 | if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1663 | return EmitGlobalConstantStruct(CVS, AddrSpace, AP); |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1664 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1665 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1666 | return EmitGlobalConstantFP(CFP, AddrSpace, AP); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1667 | |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1668 | if (isa<ConstantPointerNull>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1669 | unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1670 | AP.OutStreamer.EmitIntValue(0, Size, AddrSpace); |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1671 | return; |
| 1672 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1673 | |
Chris Lattner | 93b122d | 2010-03-16 21:25:55 +0000 | [diff] [blame] | 1674 | if (const ConstantVector *V = dyn_cast<ConstantVector>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1675 | return EmitGlobalConstantVector(V, AddrSpace, AP); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1676 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1677 | // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it |
| 1678 | // thread the streamer with EmitValue. |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1679 | AP.OutStreamer.EmitValue(LowerConstant(CV, AP), |
| 1680 | AP.TM.getTargetData()->getTypeAllocSize(CV->getType()), |
| 1681 | AddrSpace); |
| 1682 | } |
| 1683 | |
| 1684 | /// EmitGlobalConstant - Print a general LLVM constant to the .s file. |
| 1685 | void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) { |
| 1686 | uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1687 | if (Size) |
| 1688 | EmitGlobalConstantImpl(CV, AddrSpace, *this); |
| 1689 | else if (MAI->hasSubsectionsViaSymbols()) { |
| 1690 | // If the global has zero size, emit a single byte so that two labels don't |
| 1691 | // look like they are at the same location. |
| 1692 | OutStreamer.EmitIntValue(0, 1, AddrSpace); |
| 1693 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1694 | } |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1695 | |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 1696 | void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) { |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1697 | // Target doesn't support this yet! |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1698 | llvm_unreachable("Target does not support EmitMachineConstantPoolValue"); |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1699 | } |
| 1700 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1701 | void AsmPrinter::printOffset(int64_t Offset, raw_ostream &OS) const { |
| 1702 | if (Offset > 0) |
| 1703 | OS << '+' << Offset; |
| 1704 | else if (Offset < 0) |
| 1705 | OS << Offset; |
| 1706 | } |
| 1707 | |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1708 | //===----------------------------------------------------------------------===// |
| 1709 | // Symbol Lowering Routines. |
| 1710 | //===----------------------------------------------------------------------===// |
| 1711 | |
| 1712 | /// GetTempSymbol - Return the MCSymbol corresponding to the assembler |
| 1713 | /// temporary label with the specified stem and unique ID. |
| 1714 | MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name, unsigned ID) const { |
Chris Lattner | af8df26 | 2010-04-04 19:28:59 +0000 | [diff] [blame] | 1715 | return OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1716 | Name + Twine(ID)); |
| 1717 | } |
| 1718 | |
| 1719 | /// GetTempSymbol - Return an assembler temporary label with the specified |
| 1720 | /// stem. |
| 1721 | MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name) const { |
| 1722 | return OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix())+ |
| 1723 | Name); |
| 1724 | } |
| 1725 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1726 | |
Chris Lattner | 9517554 | 2010-02-08 23:10:08 +0000 | [diff] [blame] | 1727 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const { |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1728 | return MMI->getAddrLabelSymbol(BA->getBasicBlock()); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1729 | } |
| 1730 | |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1731 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const { |
| 1732 | return MMI->getAddrLabelSymbol(BB); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1733 | } |
| 1734 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1735 | /// GetCPISymbol - Return the symbol for the specified constant pool entry. |
| 1736 | MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1737 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1738 | (Twine(MAI->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber()) |
| 1739 | + "_" + Twine(CPID)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1740 | } |
| 1741 | |
| 1742 | /// GetJTISymbol - Return the symbol for the specified jump table entry. |
Bill Wendling | 07d3177 | 2010-06-29 22:34:52 +0000 | [diff] [blame] | 1743 | MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const { |
| 1744 | return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate); |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1745 | } |
| 1746 | |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1747 | /// GetJTSetSymbol - Return the symbol for the specified jump table .set |
| 1748 | /// FIXME: privatize to AsmPrinter. |
| 1749 | MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1750 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1751 | (Twine(MAI->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" + |
| 1752 | Twine(UID) + "_set_" + Twine(MBBID)); |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1753 | } |
| 1754 | |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1755 | /// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1756 | /// 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] | 1757 | /// symbol is forced to have private linkage if ForcePrivate is true. |
| 1758 | MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV, |
| 1759 | StringRef Suffix, |
| 1760 | bool ForcePrivate) const { |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1761 | SmallString<60> NameStr; |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1762 | Mang->getNameWithPrefix(NameStr, GV, ForcePrivate); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1763 | NameStr.append(Suffix.begin(), Suffix.end()); |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1764 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1765 | } |
| 1766 | |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1767 | /// GetExternalSymbolSymbol - Return the MCSymbol for the specified |
| 1768 | /// ExternalSymbol. |
| 1769 | MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const { |
| 1770 | SmallString<60> NameStr; |
| 1771 | Mang->getNameWithPrefix(NameStr, Sym); |
| 1772 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1773 | } |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1774 | |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1775 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1776 | |
| 1777 | /// PrintParentLoopComment - Print comments about parent loops of this one. |
| 1778 | static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1779 | unsigned FunctionNumber) { |
| 1780 | if (Loop == 0) return; |
| 1781 | PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber); |
| 1782 | OS.indent(Loop->getLoopDepth()*2) |
| 1783 | << "Parent Loop BB" << FunctionNumber << "_" |
| 1784 | << Loop->getHeader()->getNumber() |
| 1785 | << " Depth=" << Loop->getLoopDepth() << '\n'; |
| 1786 | } |
| 1787 | |
| 1788 | |
| 1789 | /// PrintChildLoopComment - Print comments about child loops within |
| 1790 | /// the loop for this basic block, with nesting. |
| 1791 | static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1792 | unsigned FunctionNumber) { |
| 1793 | // Add child loop information |
| 1794 | for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){ |
| 1795 | OS.indent((*CL)->getLoopDepth()*2) |
| 1796 | << "Child Loop BB" << FunctionNumber << "_" |
| 1797 | << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth() |
| 1798 | << '\n'; |
| 1799 | PrintChildLoopComment(OS, *CL, FunctionNumber); |
| 1800 | } |
| 1801 | } |
| 1802 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1803 | /// EmitBasicBlockLoopComments - Pretty-print comments for basic blocks. |
| 1804 | static void EmitBasicBlockLoopComments(const MachineBasicBlock &MBB, |
| 1805 | const MachineLoopInfo *LI, |
| 1806 | const AsmPrinter &AP) { |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1807 | // Add loop depth information |
| 1808 | const MachineLoop *Loop = LI->getLoopFor(&MBB); |
| 1809 | if (Loop == 0) return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1810 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1811 | MachineBasicBlock *Header = Loop->getHeader(); |
| 1812 | assert(Header && "No header for loop"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1813 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1814 | // If this block is not a loop header, just print out what is the loop header |
| 1815 | // and return. |
| 1816 | if (Header != &MBB) { |
| 1817 | AP.OutStreamer.AddComment(" in Loop: Header=BB" + |
| 1818 | Twine(AP.getFunctionNumber())+"_" + |
| 1819 | Twine(Loop->getHeader()->getNumber())+ |
| 1820 | " Depth="+Twine(Loop->getLoopDepth())); |
| 1821 | return; |
| 1822 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1823 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1824 | // Otherwise, it is a loop header. Print out information about child and |
| 1825 | // parent loops. |
| 1826 | raw_ostream &OS = AP.OutStreamer.GetCommentOS(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1827 | |
| 1828 | PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber()); |
| 1829 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1830 | OS << "=>"; |
| 1831 | OS.indent(Loop->getLoopDepth()*2-2); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1832 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1833 | OS << "This "; |
| 1834 | if (Loop->empty()) |
| 1835 | OS << "Inner "; |
| 1836 | OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n'; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1837 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1838 | PrintChildLoopComment(OS, Loop, AP.getFunctionNumber()); |
| 1839 | } |
| 1840 | |
| 1841 | |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1842 | /// EmitBasicBlockStart - This method prints the label for the specified |
| 1843 | /// MachineBasicBlock, an alignment (if present) and a comment describing |
| 1844 | /// it if appropriate. |
Chris Lattner | 662316c | 2009-09-14 03:15:54 +0000 | [diff] [blame] | 1845 | void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const { |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1846 | // Emit an alignment directive for this block, if needed. |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1847 | if (unsigned Align = MBB->getAlignment()) |
| 1848 | EmitAlignment(Log2_32(Align)); |
Evan Cheng | fb8075d | 2008-02-28 00:43:03 +0000 | [diff] [blame] | 1849 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1850 | // If the block has its address taken, emit any labels that were used to |
| 1851 | // reference the block. It is possible that there is more than one label |
| 1852 | // here, because multiple LLVM BB's may have been RAUW'd to this block after |
| 1853 | // the references were generated. |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1854 | if (MBB->hasAddressTaken()) { |
Chris Lattner | 213168b | 2010-01-20 07:24:05 +0000 | [diff] [blame] | 1855 | const BasicBlock *BB = MBB->getBasicBlock(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1856 | if (isVerbose()) |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1857 | OutStreamer.AddComment("Block address taken"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1858 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1859 | std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB); |
| 1860 | |
| 1861 | for (unsigned i = 0, e = Syms.size(); i != e; ++i) |
| 1862 | OutStreamer.EmitLabel(Syms[i]); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1863 | } |
| 1864 | |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1865 | // Print the main label for the block. |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1866 | if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1867 | if (isVerbose() && OutStreamer.hasRawTextSupport()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1868 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1869 | if (BB->hasName()) |
| 1870 | OutStreamer.AddComment("%" + BB->getName()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1871 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1872 | EmitBasicBlockLoopComments(*MBB, LI, *this); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1873 | |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1874 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
| 1875 | OutStreamer.EmitRawText(Twine(MAI->getCommentString()) + " BB#" + |
| 1876 | Twine(MBB->getNumber()) + ":"); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1877 | } |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1878 | } else { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1879 | if (isVerbose()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1880 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1881 | if (BB->hasName()) |
| 1882 | OutStreamer.AddComment("%" + BB->getName()); |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1883 | EmitBasicBlockLoopComments(*MBB, LI, *this); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1884 | } |
Chris Lattner | d8d0aee | 2010-01-22 21:00:45 +0000 | [diff] [blame] | 1885 | |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1886 | OutStreamer.EmitLabel(MBB->getSymbol()); |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1887 | } |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1888 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 1889 | |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 1890 | void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility, |
| 1891 | bool IsDefinition) const { |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1892 | MCSymbolAttr Attr = MCSA_Invalid; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1893 | |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1894 | switch (Visibility) { |
| 1895 | default: break; |
| 1896 | case GlobalValue::HiddenVisibility: |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 1897 | if (IsDefinition) |
| 1898 | Attr = MAI->getHiddenVisibilityAttr(); |
| 1899 | else |
| 1900 | Attr = MAI->getHiddenDeclarationVisibilityAttr(); |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1901 | break; |
| 1902 | case GlobalValue::ProtectedVisibility: |
| 1903 | Attr = MAI->getProtectedVisibilityAttr(); |
| 1904 | break; |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 1905 | } |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1906 | |
| 1907 | if (Attr != MCSA_Invalid) |
| 1908 | OutStreamer.EmitSymbolAttribute(Sym, Attr); |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 1909 | } |
| 1910 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1911 | /// isBlockOnlyReachableByFallthough - Return true if the basic block has |
| 1912 | /// exactly one predecessor and the control transfer mechanism between |
| 1913 | /// the predecessor and this block is a fall-through. |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 1914 | bool AsmPrinter:: |
| 1915 | isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const { |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1916 | // If this is a landing pad, it isn't a fall through. If it has no preds, |
| 1917 | // then nothing falls through to it. |
| 1918 | if (MBB->isLandingPad() || MBB->pred_empty()) |
| 1919 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1920 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1921 | // If there isn't exactly one predecessor, it can't be a fall through. |
| 1922 | MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI; |
| 1923 | ++PI2; |
| 1924 | if (PI2 != MBB->pred_end()) |
| 1925 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1926 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1927 | // The predecessor has to be immediately before this block. |
| 1928 | const MachineBasicBlock *Pred = *PI; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1929 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1930 | if (!Pred->isLayoutSuccessor(MBB)) |
| 1931 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1932 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1933 | // If the block is completely empty, then it definitely does fall through. |
| 1934 | if (Pred->empty()) |
| 1935 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1936 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1937 | // Otherwise, check the last instruction. |
| 1938 | const MachineInstr &LastInst = Pred->back(); |
| 1939 | return !LastInst.getDesc().isBarrier(); |
| 1940 | } |
| 1941 | |
| 1942 | |
| 1943 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1944 | GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) { |
| 1945 | if (!S->usesMetadata()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1946 | return 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 1947 | |
| 1948 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
| 1949 | gcp_map_type::iterator GCPI = GCMap.find(S); |
| 1950 | if (GCPI != GCMap.end()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1951 | return GCPI->second; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1952 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1953 | const char *Name = S->getName().c_str(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1954 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1955 | for (GCMetadataPrinterRegistry::iterator |
| 1956 | I = GCMetadataPrinterRegistry::begin(), |
| 1957 | E = GCMetadataPrinterRegistry::end(); I != E; ++I) |
| 1958 | if (strcmp(Name, I->getName()) == 0) { |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1959 | GCMetadataPrinter *GMP = I->instantiate(); |
| 1960 | GMP->S = S; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 1961 | GCMap.insert(std::make_pair(S, GMP)); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1962 | return GMP; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1963 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1964 | |
Chris Lattner | 75361b6 | 2010-04-07 22:58:41 +0000 | [diff] [blame] | 1965 | report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name)); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1966 | return 0; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1967 | } |
David Greene | 014700c | 2009-07-13 20:25:48 +0000 | [diff] [blame] | 1968 | |