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" |
Owen Anderson | 07000c6 | 2006-05-12 06:33:49 +0000 | [diff] [blame] | 36 | #include "llvm/Target/TargetData.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 37 | #include "llvm/Target/TargetInstrInfo.h" |
Chris Lattner | 0336fdb | 2006-10-06 22:50:56 +0000 | [diff] [blame] | 38 | #include "llvm/Target/TargetLowering.h" |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 39 | #include "llvm/Target/TargetLoweringObjectFile.h" |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 40 | #include "llvm/Target/TargetOptions.h" |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 41 | #include "llvm/Target/TargetRegisterInfo.h" |
Chris Lattner | 9fc5cdf | 2011-01-02 22:09:33 +0000 | [diff] [blame] | 42 | #include "llvm/Assembly/Writer.h" |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 43 | #include "llvm/ADT/SmallString.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 44 | #include "llvm/ADT/Statistic.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 45 | #include "llvm/Support/ErrorHandling.h" |
| 46 | #include "llvm/Support/Format.h" |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 47 | #include "llvm/Support/MathExtras.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 | |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 192 | switch (MAI->getExceptionHandlingType()) { |
| 193 | case ExceptionHandling::None: |
| 194 | return false; |
| 195 | case ExceptionHandling::SjLj: |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 196 | case ExceptionHandling::DwarfCFI: |
| 197 | DE = new DwarfCFIException(this); |
| 198 | return false; |
| 199 | case ExceptionHandling::ARM: |
| 200 | DE = new ARMException(this); |
| 201 | return false; |
Charles Davis | d652b13 | 2011-05-27 23:47:32 +0000 | [diff] [blame] | 202 | case ExceptionHandling::Win64: |
| 203 | DE = new Win64Exception(this); |
| 204 | return false; |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 205 | } |
Devang Patel | 14a55d9 | 2009-06-19 21:54:26 +0000 | [diff] [blame] | 206 | |
Rafael Espindola | 2d57a64 | 2011-05-05 19:48:34 +0000 | [diff] [blame] | 207 | llvm_unreachable("Unknown exception type."); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 208 | } |
| 209 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 210 | void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 211 | switch ((GlobalValue::LinkageTypes)Linkage) { |
| 212 | case GlobalValue::CommonLinkage: |
| 213 | case GlobalValue::LinkOnceAnyLinkage: |
| 214 | case GlobalValue::LinkOnceODRLinkage: |
| 215 | case GlobalValue::WeakAnyLinkage: |
| 216 | case GlobalValue::WeakODRLinkage: |
Bill Wendling | 5e721d7 | 2010-07-01 21:55:59 +0000 | [diff] [blame] | 217 | case GlobalValue::LinkerPrivateWeakLinkage: |
Bill Wendling | 55ae515 | 2010-08-20 22:05:50 +0000 | [diff] [blame] | 218 | case GlobalValue::LinkerPrivateWeakDefAutoLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 219 | if (MAI->getWeakDefDirective() != 0) { |
| 220 | // .globl _foo |
| 221 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Bill Wendling | 55ae515 | 2010-08-20 22:05:50 +0000 | [diff] [blame] | 222 | |
| 223 | if ((GlobalValue::LinkageTypes)Linkage != |
| 224 | GlobalValue::LinkerPrivateWeakDefAutoLinkage) |
| 225 | // .weak_definition _foo |
| 226 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition); |
| 227 | else |
| 228 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefAutoPrivate); |
Duncan Sands | 5b1b3b7 | 2010-05-12 07:11:33 +0000 | [diff] [blame] | 229 | } else if (MAI->getLinkOnceDirective() != 0) { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 230 | // .globl _foo |
| 231 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Duncan Sands | 5b1b3b7 | 2010-05-12 07:11:33 +0000 | [diff] [blame] | 232 | //NOTE: linkonce is handled by the section the symbol was assigned to. |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 233 | } else { |
| 234 | // .weak _foo |
| 235 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak); |
| 236 | } |
| 237 | break; |
| 238 | case GlobalValue::DLLExportLinkage: |
| 239 | case GlobalValue::AppendingLinkage: |
| 240 | // FIXME: appending linkage variables should go into a section of |
| 241 | // their name or something. For now, just emit them as external. |
| 242 | case GlobalValue::ExternalLinkage: |
| 243 | // If external or appending, declare as a global symbol. |
| 244 | // .globl _foo |
| 245 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 246 | break; |
| 247 | case GlobalValue::PrivateLinkage: |
| 248 | case GlobalValue::InternalLinkage: |
Bill Wendling | eabd735 | 2010-07-01 22:38:24 +0000 | [diff] [blame] | 249 | case GlobalValue::LinkerPrivateLinkage: |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 250 | break; |
| 251 | default: |
| 252 | llvm_unreachable("Unknown linkage type!"); |
| 253 | } |
| 254 | } |
| 255 | |
| 256 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 257 | /// EmitGlobalVariable - Emit the specified global variable to the .s file. |
| 258 | void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 259 | if (GV->hasInitializer()) { |
| 260 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 261 | if (EmitSpecialLLVMGlobal(GV)) |
| 262 | return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 263 | |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 264 | if (isVerbose()) { |
| 265 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 266 | /*PrintType=*/false, GV->getParent()); |
| 267 | OutStreamer.GetCommentOS() << '\n'; |
| 268 | } |
Eric Christopher | 04386ca | 2010-05-25 21:49:43 +0000 | [diff] [blame] | 269 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 270 | |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 271 | MCSymbol *GVSym = Mang->getSymbol(GV); |
Chad Rosier | 348d542 | 2011-06-10 00:53:15 +0000 | [diff] [blame] | 272 | EmitVisibility(GVSym, GV->getVisibility(), !GV->isDeclaration()); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 273 | |
Rafael Espindola | 8439747 | 2011-04-05 15:51:32 +0000 | [diff] [blame] | 274 | if (!GV->hasInitializer()) // External globals require no extra code. |
| 275 | return; |
| 276 | |
Chris Lattner | a800f7c | 2010-01-25 18:33:40 +0000 | [diff] [blame] | 277 | if (MAI->hasDotTypeDotSizeDirective()) |
| 278 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 279 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 280 | SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); |
| 281 | |
| 282 | const TargetData *TD = TM.getTargetData(); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 283 | uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 284 | |
Chris Lattner | 567dd1f | 2010-04-26 18:46:46 +0000 | [diff] [blame] | 285 | // If the alignment is specified, we *must* obey it. Overaligning a global |
| 286 | // with a specified alignment is a prompt way to break globals emitted to |
| 287 | // sections and expected to be contiguous (e.g. ObjC metadata). |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 288 | unsigned AlignLog = getGVAlignmentLog2(GV, *TD); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 289 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 290 | // Handle common and BSS local symbols (.lcomm). |
| 291 | if (GVKind.isCommon() || GVKind.isBSSLocal()) { |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 292 | if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 293 | unsigned Align = 1 << AlignLog; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 294 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 295 | // Handle common symbols. |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 296 | if (GVKind.isCommon()) { |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 297 | if (!getObjFileLowering().getCommDirectiveSupportsAlignment()) |
| 298 | Align = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 299 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 300 | // .comm _foo, 42, 4 |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 301 | OutStreamer.EmitCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 302 | return; |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 303 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 304 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 305 | // Handle local BSS symbols. |
| 306 | if (MAI->hasMachoZeroFillDirective()) { |
| 307 | const MCSection *TheSection = |
| 308 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 309 | // .zerofill __DATA, __bss, _foo, 400, 5 |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 310 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 311 | return; |
| 312 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 313 | |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 314 | if (MAI->getLCOMMDirectiveType() != LCOMM::None && |
| 315 | (MAI->getLCOMMDirectiveType() != LCOMM::NoAlignment || Align == 1)) { |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 316 | // .lcomm _foo, 42 |
Benjamin Kramer | 36a1601 | 2011-09-01 23:04:27 +0000 | [diff] [blame] | 317 | OutStreamer.EmitLocalCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 318 | return; |
| 319 | } |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 320 | |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 321 | if (!getObjFileLowering().getCommDirectiveSupportsAlignment()) |
| 322 | Align = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 323 | |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 324 | // .local _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 325 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 326 | // .comm _foo, 42, 4 |
Chris Lattner | 8048ebe | 2010-09-27 06:44:54 +0000 | [diff] [blame] | 327 | OutStreamer.EmitCommonSymbol(GVSym, Size, Align); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 328 | return; |
| 329 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 330 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 331 | const MCSection *TheSection = |
| 332 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 333 | |
| 334 | // Handle the zerofill directive on darwin, which is a special form of BSS |
| 335 | // emission. |
| 336 | if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) { |
Chris Lattner | 4c4d0c0 | 2010-04-27 07:41:44 +0000 | [diff] [blame] | 337 | if (Size == 0) Size = 1; // zerofill of 0 bytes is undefined. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 338 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 339 | // .globl _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 340 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 341 | // .zerofill __DATA, __common, _foo, 400, 5 |
| 342 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 343 | return; |
| 344 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 345 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 346 | // Handle thread local data for mach-o which requires us to output an |
| 347 | // additional structure of data and mangle the original symbol so that we |
| 348 | // can reference it later. |
Chris Lattner | dfe254b | 2010-09-05 20:33:40 +0000 | [diff] [blame] | 349 | // |
| 350 | // TODO: This should become an "emit thread local global" method on TLOF. |
| 351 | // All of this macho specific stuff should be sunk down into TLOFMachO and |
| 352 | // stuff like "TLSExtraDataSection" should no longer be part of the parent |
| 353 | // TLOF class. This will also make it more obvious that stuff like |
| 354 | // MCStreamer::EmitTBSSSymbol is macho specific and only called from macho |
| 355 | // specific code. |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 356 | if (GVKind.isThreadLocal() && MAI->hasMachoTBSSDirective()) { |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 357 | // Emit the .tbss symbol |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 358 | MCSymbol *MangSym = |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 359 | OutContext.GetOrCreateSymbol(GVSym->getName() + Twine("$tlv$init")); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 360 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 361 | if (GVKind.isThreadBSS()) |
| 362 | OutStreamer.EmitTBSSSymbol(TheSection, MangSym, Size, 1 << AlignLog); |
| 363 | else if (GVKind.isThreadData()) { |
| 364 | OutStreamer.SwitchSection(TheSection); |
| 365 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 366 | EmitAlignment(AlignLog, GV); |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 367 | OutStreamer.EmitLabel(MangSym); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 368 | |
Eric Christopher | 02b46bc | 2010-05-25 21:28:50 +0000 | [diff] [blame] | 369 | EmitGlobalConstant(GV->getInitializer()); |
| 370 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 371 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 372 | OutStreamer.AddBlankLine(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 373 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 374 | // Emit the variable struct for the runtime. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 375 | const MCSection *TLVSect |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 376 | = getObjFileLowering().getTLSExtraDataSection(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 377 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 378 | OutStreamer.SwitchSection(TLVSect); |
| 379 | // Emit the linkage here. |
| 380 | EmitLinkage(GV->getLinkage(), GVSym); |
| 381 | OutStreamer.EmitLabel(GVSym); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 382 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 383 | // Three pointers in size: |
| 384 | // - __tlv_bootstrap - used to make sure support exists |
| 385 | // - spare pointer, used when mapped by the runtime |
| 386 | // - pointer to mangled symbol above with initializer |
| 387 | unsigned PtrSize = TD->getPointerSizeInBits()/8; |
Eric Christopher | 7310064 | 2010-06-03 04:02:59 +0000 | [diff] [blame] | 388 | OutStreamer.EmitSymbolValue(GetExternalSymbolSymbol("_tlv_bootstrap"), |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 389 | PtrSize, 0); |
| 390 | OutStreamer.EmitIntValue(0, PtrSize, 0); |
| 391 | OutStreamer.EmitSymbolValue(MangSym, PtrSize, 0); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 392 | |
Eric Christopher | 8116ca5 | 2010-05-22 00:10:22 +0000 | [diff] [blame] | 393 | OutStreamer.AddBlankLine(); |
Eric Christopher | c1a887d | 2010-05-20 00:49:07 +0000 | [diff] [blame] | 394 | return; |
| 395 | } |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 396 | |
| 397 | OutStreamer.SwitchSection(TheSection); |
| 398 | |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 399 | EmitLinkage(GV->getLinkage(), GVSym); |
Chris Lattner | f74e25f | 2010-04-26 18:30:45 +0000 | [diff] [blame] | 400 | EmitAlignment(AlignLog, GV); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 401 | |
Chris Lattner | 4c8c668 | 2010-01-19 06:41:24 +0000 | [diff] [blame] | 402 | OutStreamer.EmitLabel(GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 403 | |
| 404 | EmitGlobalConstant(GV->getInitializer()); |
| 405 | |
| 406 | if (MAI->hasDotTypeDotSizeDirective()) |
Chris Lattner | 1947f24 | 2010-01-25 07:53:05 +0000 | [diff] [blame] | 407 | // .size foo, 42 |
Chris Lattner | 99328ad | 2010-01-25 07:52:13 +0000 | [diff] [blame] | 408 | OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext)); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 409 | |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 410 | OutStreamer.AddBlankLine(); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 411 | } |
| 412 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 413 | /// EmitFunctionHeader - This method emits the header for the current |
| 414 | /// function. |
| 415 | void AsmPrinter::EmitFunctionHeader() { |
| 416 | // Print out constants referenced by the function |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 417 | EmitConstantPool(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 418 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 419 | // Print the 'header' of function. |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 420 | const Function *F = MF->getFunction(); |
| 421 | |
| 422 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM)); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 423 | EmitVisibility(CurrentFnSym, F->getVisibility()); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 424 | |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 425 | EmitLinkage(F->getLinkage(), CurrentFnSym); |
Chris Lattner | b406a81 | 2010-01-26 23:41:48 +0000 | [diff] [blame] | 426 | EmitAlignment(MF->getAlignment(), F); |
| 427 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 428 | if (MAI->hasDotTypeDotSizeDirective()) |
| 429 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction); |
| 430 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 431 | if (isVerbose()) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 432 | WriteAsOperand(OutStreamer.GetCommentOS(), F, |
| 433 | /*PrintType=*/false, F->getParent()); |
| 434 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 435 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 436 | |
Dan Gohman | f451cb8 | 2010-02-10 16:03:48 +0000 | [diff] [blame] | 437 | // Emit the CurrentFnSym. This is a virtual function to allow targets to |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 438 | // do their wild and crazy things as required. |
| 439 | EmitFunctionEntryLabel(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 440 | |
Chris Lattner | 9cc0da9 | 2010-03-15 20:39:00 +0000 | [diff] [blame] | 441 | // If the function had address-taken blocks that got deleted, then we have |
| 442 | // references to the dangling symbols. Emit them at the start of the function |
| 443 | // so that we don't get references to undefined symbols. |
| 444 | std::vector<MCSymbol*> DeadBlockSyms; |
| 445 | MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms); |
| 446 | for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) { |
| 447 | OutStreamer.AddComment("Address taken block that was later removed"); |
| 448 | OutStreamer.EmitLabel(DeadBlockSyms[i]); |
| 449 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 450 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 451 | // Add some workaround for linkonce linkage on Cygwin\MinGW. |
| 452 | if (MAI->getLinkOnceDirective() != 0 && |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 453 | (F->hasLinkOnceLinkage() || F->hasWeakLinkage())) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 454 | // FIXME: What is this? |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 455 | MCSymbol *FakeStub = |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 456 | OutContext.GetOrCreateSymbol(Twine("Lllvm$workaround$fake$stub$")+ |
| 457 | CurrentFnSym->getName()); |
| 458 | OutStreamer.EmitLabel(FakeStub); |
| 459 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 460 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 461 | // Emit pre-function debug and/or EH information. |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 462 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 463 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 464 | DE->BeginFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 465 | } |
| 466 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 467 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 468 | DD->beginFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 469 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 470 | } |
| 471 | |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 472 | /// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the |
| 473 | /// function. This can be overridden by targets as required to do custom stuff. |
| 474 | void AsmPrinter::EmitFunctionEntryLabel() { |
Chris Lattner | b4202db | 2010-05-06 00:05:37 +0000 | [diff] [blame] | 475 | // The function label could have already been emitted if two symbols end up |
| 476 | // conflicting due to asm renaming. Detect this and emit an error. |
Owen Anderson | 2fec6c5 | 2011-10-04 23:26:17 +0000 | [diff] [blame] | 477 | if (CurrentFnSym->isUndefined()) { |
| 478 | OutStreamer.ForceCodeRegion(); |
Chris Lattner | b4202db | 2010-05-06 00:05:37 +0000 | [diff] [blame] | 479 | return OutStreamer.EmitLabel(CurrentFnSym); |
Owen Anderson | 2fec6c5 | 2011-10-04 23:26:17 +0000 | [diff] [blame] | 480 | } |
Chris Lattner | b4202db | 2010-05-06 00:05:37 +0000 | [diff] [blame] | 481 | |
| 482 | report_fatal_error("'" + Twine(CurrentFnSym->getName()) + |
| 483 | "' label emitted multiple times to assembly file"); |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 484 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 485 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 486 | |
Devang Patel | e025e96 | 2010-06-29 22:29:15 +0000 | [diff] [blame] | 487 | /// EmitComments - Pretty-print comments for instructions. |
| 488 | static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) { |
| 489 | const MachineFunction *MF = MI.getParent()->getParent(); |
| 490 | const TargetMachine &TM = MF->getTarget(); |
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 | // Check for spills and reloads |
| 493 | int FI; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 494 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 495 | const MachineFrameInfo *FrameInfo = MF->getFrameInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 496 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 497 | // We assume a single instruction only has a spill or reload, not |
| 498 | // both. |
| 499 | const MachineMemOperand *MMO; |
| 500 | if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) { |
| 501 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 502 | MMO = *MI.memoperands_begin(); |
| 503 | CommentOS << MMO->getSize() << "-byte Reload\n"; |
| 504 | } |
| 505 | } else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) { |
| 506 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 507 | CommentOS << MMO->getSize() << "-byte Folded Reload\n"; |
| 508 | } else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) { |
| 509 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 510 | MMO = *MI.memoperands_begin(); |
| 511 | CommentOS << MMO->getSize() << "-byte Spill\n"; |
| 512 | } |
| 513 | } else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) { |
| 514 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 515 | CommentOS << MMO->getSize() << "-byte Folded Spill\n"; |
| 516 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 517 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 518 | // Check for spill-induced copies |
Jakob Stoklund Olesen | 04c528a | 2010-07-16 04:45:42 +0000 | [diff] [blame] | 519 | if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse)) |
| 520 | CommentOS << " Reload Reuse\n"; |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 521 | } |
| 522 | |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 523 | /// EmitImplicitDef - This method emits the specified machine instruction |
| 524 | /// that is an implicit def. |
| 525 | static void EmitImplicitDef(const MachineInstr *MI, AsmPrinter &AP) { |
| 526 | unsigned RegNo = MI->getOperand(0).getReg(); |
| 527 | AP.OutStreamer.AddComment(Twine("implicit-def: ") + |
| 528 | AP.TM.getRegisterInfo()->getName(RegNo)); |
| 529 | AP.OutStreamer.AddBlankLine(); |
| 530 | } |
| 531 | |
| 532 | static void EmitKill(const MachineInstr *MI, AsmPrinter &AP) { |
| 533 | std::string Str = "kill:"; |
| 534 | for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) { |
| 535 | const MachineOperand &Op = MI->getOperand(i); |
| 536 | assert(Op.isReg() && "KILL instruction must have only register operands"); |
| 537 | Str += ' '; |
| 538 | Str += AP.TM.getRegisterInfo()->getName(Op.getReg()); |
| 539 | Str += (Op.isDef() ? "<def>" : "<kill>"); |
| 540 | } |
| 541 | AP.OutStreamer.AddComment(Str); |
| 542 | AP.OutStreamer.AddBlankLine(); |
| 543 | } |
| 544 | |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 545 | /// EmitDebugValueComment - This method handles the target-independent form |
| 546 | /// of DBG_VALUE, returning true if it was able to do so. A false return |
| 547 | /// means the target will need to handle MI in EmitInstruction. |
| 548 | static bool EmitDebugValueComment(const MachineInstr *MI, AsmPrinter &AP) { |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 549 | // This code handles only the 3-operand target-independent form. |
| 550 | if (MI->getNumOperands() != 3) |
| 551 | return false; |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 552 | |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 553 | SmallString<128> Str; |
| 554 | raw_svector_ostream OS(Str); |
| 555 | OS << '\t' << AP.MAI->getCommentString() << "DEBUG_VALUE: "; |
| 556 | |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 557 | // cast away const; DIetc do not take const operands for some reason. |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 558 | DIVariable V(const_cast<MDNode*>(MI->getOperand(2).getMetadata())); |
Devang Patel | 67a444c | 2010-04-29 18:52:10 +0000 | [diff] [blame] | 559 | if (V.getContext().isSubprogram()) |
Devang Patel | 2db49d7 | 2010-05-07 18:11:54 +0000 | [diff] [blame] | 560 | OS << DISubprogram(V.getContext()).getDisplayName() << ":"; |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 561 | OS << V.getName() << " <- "; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 562 | |
| 563 | // Register or immediate value. Register 0 means undef. |
| 564 | if (MI->getOperand(0).isFPImm()) { |
| 565 | APFloat APF = APFloat(MI->getOperand(0).getFPImm()->getValueAPF()); |
| 566 | if (MI->getOperand(0).getFPImm()->getType()->isFloatTy()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 567 | OS << (double)APF.convertToFloat(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 568 | } else if (MI->getOperand(0).getFPImm()->getType()->isDoubleTy()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 569 | OS << APF.convertToDouble(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 570 | } else { |
| 571 | // There is no good way to print long double. Convert a copy to |
| 572 | // double. Ah well, it's only a comment. |
| 573 | bool ignored; |
| 574 | APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 575 | &ignored); |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 576 | OS << "(long double) " << APF.convertToDouble(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 577 | } |
| 578 | } else if (MI->getOperand(0).isImm()) { |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 579 | OS << MI->getOperand(0).getImm(); |
Devang Patel | 8594d42 | 2011-06-24 20:46:11 +0000 | [diff] [blame] | 580 | } else if (MI->getOperand(0).isCImm()) { |
| 581 | MI->getOperand(0).getCImm()->getValue().print(OS, false /*isSigned*/); |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 582 | } else { |
| 583 | assert(MI->getOperand(0).isReg() && "Unknown operand type"); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 584 | if (MI->getOperand(0).getReg() == 0) { |
| 585 | // Suppress offset, it is not meaningful here. |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 586 | OS << "undef"; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 587 | // 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] | 588 | AP.OutStreamer.EmitRawText(OS.str()); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 589 | return true; |
| 590 | } |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 591 | OS << AP.TM.getRegisterInfo()->getName(MI->getOperand(0).getReg()); |
Chris Lattner | 00d1390 | 2010-04-07 22:29:10 +0000 | [diff] [blame] | 592 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 593 | |
Benjamin Kramer | a592e67 | 2010-04-07 09:26:51 +0000 | [diff] [blame] | 594 | OS << '+' << MI->getOperand(1).getImm(); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 595 | // 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] | 596 | AP.OutStreamer.EmitRawText(OS.str()); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 597 | return true; |
| 598 | } |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 599 | |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 600 | AsmPrinter::CFIMoveType AsmPrinter::needsCFIMoves() { |
Rafael Espindola | fc2bb8c | 2011-05-25 03:44:17 +0000 | [diff] [blame] | 601 | if (MAI->getExceptionHandlingType() == ExceptionHandling::DwarfCFI && |
| 602 | MF->getFunction()->needsUnwindTableEntry()) |
| 603 | return CFI_M_EH; |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 604 | |
Rafael Espindola | f2b0423 | 2011-05-06 14:56:22 +0000 | [diff] [blame] | 605 | if (MMI->hasDebugInfo()) |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 606 | return CFI_M_Debug; |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 607 | |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 608 | return CFI_M_None; |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 609 | } |
| 610 | |
Charles Davis | f463370 | 2011-05-28 04:21:04 +0000 | [diff] [blame] | 611 | bool AsmPrinter::needsSEHMoves() { |
| 612 | return MAI->getExceptionHandlingType() == ExceptionHandling::Win64 && |
| 613 | MF->getFunction()->needsUnwindTableEntry(); |
| 614 | } |
| 615 | |
Nick Lewycky | 390c40d | 2011-10-27 06:44:11 +0000 | [diff] [blame^] | 616 | bool AsmPrinter::needsRelocationsForDwarfStringPool() const { |
| 617 | return MAI->doesDwarfUseRelocationsForStringPool(); |
| 618 | } |
| 619 | |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 620 | void AsmPrinter::emitPrologLabel(const MachineInstr &MI) { |
| 621 | MCSymbol *Label = MI.getOperand(0).getMCSymbol(); |
Rafael Espindola | fea8fea | 2011-04-26 19:26:53 +0000 | [diff] [blame] | 622 | |
Rafael Espindola | f2b0423 | 2011-05-06 14:56:22 +0000 | [diff] [blame] | 623 | if (MAI->getExceptionHandlingType() != ExceptionHandling::DwarfCFI) |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 624 | return; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 625 | |
Rafael Espindola | e29887b | 2011-05-10 18:39:09 +0000 | [diff] [blame] | 626 | if (needsCFIMoves() == CFI_M_None) |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 627 | return; |
| 628 | |
Bill Wendling | e060a5c | 2011-07-19 00:02:51 +0000 | [diff] [blame] | 629 | if (MMI->getCompactUnwindEncoding() != 0) |
| 630 | OutStreamer.EmitCompactUnwindEncoding(MMI->getCompactUnwindEncoding()); |
| 631 | |
Rafael Espindola | a432997 | 2011-04-29 14:14:06 +0000 | [diff] [blame] | 632 | MachineModuleInfo &MMI = MF->getMMI(); |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 633 | std::vector<MachineMove> &Moves = MMI.getFrameMoves(); |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 634 | bool FoundOne = false; |
| 635 | (void)FoundOne; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 636 | for (std::vector<MachineMove>::iterator I = Moves.begin(), |
| 637 | E = Moves.end(); I != E; ++I) { |
| 638 | if (I->getLabel() == Label) { |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 639 | EmitCFIFrameMove(*I); |
| 640 | FoundOne = true; |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 641 | } |
| 642 | } |
Rafael Espindola | b28d4f1 | 2011-04-26 03:58:56 +0000 | [diff] [blame] | 643 | assert(FoundOne); |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 644 | } |
| 645 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 646 | /// EmitFunctionBody - This method emits the body and trailer for a |
| 647 | /// function. |
| 648 | void AsmPrinter::EmitFunctionBody() { |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 649 | // Emit target-specific gunk before the function body. |
| 650 | EmitFunctionBodyStart(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 651 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 652 | bool ShouldPrintDebugScopes = DD && MMI->hasDebugInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 653 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 654 | // Print out code for the function. |
| 655 | bool HasAnyRealCode = false; |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 656 | const MachineInstr *LastMI = 0; |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 657 | for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); |
| 658 | I != E; ++I) { |
| 659 | // Print a label for the basic block. |
| 660 | EmitBasicBlockStart(I); |
| 661 | for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); |
| 662 | II != IE; ++II) { |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 663 | LastMI = II; |
| 664 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 665 | // Print the assembly for the instruction. |
Dale Johannesen | d014761 | 2010-05-01 16:41:11 +0000 | [diff] [blame] | 666 | if (!II->isLabel() && !II->isImplicitDef() && !II->isKill() && |
| 667 | !II->isDebugValue()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 668 | HasAnyRealCode = true; |
Evan Cheng | ed33b13 | 2010-04-27 19:38:45 +0000 | [diff] [blame] | 669 | ++EmittedInsts; |
| 670 | } |
| 671 | |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 672 | if (ShouldPrintDebugScopes) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 673 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Devang Patel | cbbe287 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 674 | DD->beginInstruction(II); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 675 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 676 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 677 | if (isVerbose()) |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 678 | EmitComments(*II, OutStreamer.GetCommentOS()); |
| 679 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 680 | switch (II->getOpcode()) { |
Bill Wendling | 7431bea | 2010-07-16 22:20:36 +0000 | [diff] [blame] | 681 | case TargetOpcode::PROLOG_LABEL: |
Rafael Espindola | f0adba9 | 2011-04-15 15:11:06 +0000 | [diff] [blame] | 682 | emitPrologLabel(*II); |
| 683 | break; |
| 684 | |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 685 | case TargetOpcode::EH_LABEL: |
| 686 | case TargetOpcode::GC_LABEL: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 687 | OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol()); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 688 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 689 | case TargetOpcode::INLINEASM: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 690 | EmitInlineAsm(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 691 | break; |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 692 | case TargetOpcode::DBG_VALUE: |
| 693 | if (isVerbose()) { |
| 694 | if (!EmitDebugValueComment(II, *this)) |
| 695 | EmitInstruction(II); |
| 696 | } |
| 697 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 698 | case TargetOpcode::IMPLICIT_DEF: |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 699 | if (isVerbose()) EmitImplicitDef(II, *this); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 700 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 701 | case TargetOpcode::KILL: |
Chris Lattner | 17fedf2 | 2010-04-04 18:58:53 +0000 | [diff] [blame] | 702 | if (isVerbose()) EmitKill(II, *this); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 703 | break; |
| 704 | default: |
Devang Patel | 49a3ff9 | 2011-04-29 18:00:54 +0000 | [diff] [blame] | 705 | if (!TM.hasMCUseLoc()) |
| 706 | MCLineEntry::Make(&OutStreamer, getCurrentSection()); |
| 707 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 708 | EmitInstruction(II); |
| 709 | break; |
| 710 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 711 | |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 712 | if (ShouldPrintDebugScopes) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 713 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Devang Patel | cbbe287 | 2010-10-26 17:49:02 +0000 | [diff] [blame] | 714 | DD->endInstruction(II); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 715 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 716 | } |
| 717 | } |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 718 | |
| 719 | // If the last instruction was a prolog label, then we have a situation where |
| 720 | // we emitted a prolog but no function body. This results in the ending prolog |
| 721 | // label equaling the end of function label and an invalid "row" in the |
| 722 | // FDE. We need to emit a noop in this situation so that the FDE's rows are |
| 723 | // valid. |
Bill Wendling | 7490896 | 2010-07-17 19:18:44 +0000 | [diff] [blame] | 724 | bool RequiresNoop = LastMI && LastMI->isPrologLabel(); |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 725 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 726 | // 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] | 727 | // 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] | 728 | // labels from collapsing together. Just emit a noop. |
Bill Wendling | dc86704 | 2010-07-16 22:51:10 +0000 | [diff] [blame] | 729 | if ((MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) || RequiresNoop) { |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 730 | MCInst Noop; |
| 731 | TM.getInstrInfo()->getNoopForMachoTarget(Noop); |
Chris Lattner | d61647d | 2010-04-26 23:41:43 +0000 | [diff] [blame] | 732 | if (Noop.getOpcode()) { |
| 733 | OutStreamer.AddComment("avoids zero-length function"); |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 734 | OutStreamer.EmitInstruction(Noop); |
Chris Lattner | d61647d | 2010-04-26 23:41:43 +0000 | [diff] [blame] | 735 | } else // Target not mc-ized yet. |
Chris Lattner | ee9eb41 | 2010-04-26 23:37:21 +0000 | [diff] [blame] | 736 | OutStreamer.EmitRawText(StringRef("\tnop\n")); |
| 737 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 738 | |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 739 | // Emit target-specific gunk after the function body. |
| 740 | EmitFunctionBodyEnd(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 741 | |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 742 | // If the target wants a .size directive for the size of the function, emit |
| 743 | // it. |
| 744 | if (MAI->hasDotTypeDotSizeDirective()) { |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 745 | // Create a symbol for the end of function, so we can get the size as |
| 746 | // difference between the function label and the temp label. |
| 747 | MCSymbol *FnEndLabel = OutContext.CreateTempSymbol(); |
| 748 | OutStreamer.EmitLabel(FnEndLabel); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 749 | |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 750 | const MCExpr *SizeExp = |
| 751 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext), |
| 752 | MCSymbolRefExpr::Create(CurrentFnSym, OutContext), |
| 753 | OutContext); |
| 754 | OutStreamer.EmitELFSize(CurrentFnSym, SizeExp); |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 755 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 756 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 757 | // Emit post-function debug information. |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 758 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 759 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 760 | DD->endFunction(MF); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 761 | } |
| 762 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 763 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
| 764 | DE->EndFunction(); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 765 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 766 | MMI->EndFunction(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 767 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 768 | // Print out jump tables referenced by the function. |
| 769 | EmitJumpTableInfo(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 770 | |
Chris Lattner | d26a80f | 2010-02-03 01:49:49 +0000 | [diff] [blame] | 771 | OutStreamer.AddBlankLine(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 772 | } |
| 773 | |
Devang Patel | 28ff35d | 2010-04-28 01:39:28 +0000 | [diff] [blame] | 774 | /// getDebugValueLocation - Get location information encoded by DBG_VALUE |
| 775 | /// operands. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 776 | MachineLocation AsmPrinter:: |
| 777 | getDebugValueLocation(const MachineInstr *MI) const { |
Devang Patel | 28ff35d | 2010-04-28 01:39:28 +0000 | [diff] [blame] | 778 | // Target specific DBG_VALUE instructions are handled by each target. |
| 779 | return MachineLocation(); |
| 780 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 781 | |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 782 | /// EmitDwarfRegOp - Emit dwarf register operation. |
Devang Patel | 0be77df | 2011-04-27 20:29:27 +0000 | [diff] [blame] | 783 | void AsmPrinter::EmitDwarfRegOp(const MachineLocation &MLoc) const { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 784 | const TargetRegisterInfo *TRI = TM.getRegisterInfo(); |
Rafael Espindola | 37afca1 | 2011-05-27 22:15:01 +0000 | [diff] [blame] | 785 | int Reg = TRI->getDwarfRegNum(MLoc.getReg(), false); |
| 786 | |
| 787 | for (const unsigned *SR = TRI->getSuperRegisters(MLoc.getReg()); |
Rafael Espindola | 7bf114c | 2011-05-28 00:13:01 +0000 | [diff] [blame] | 788 | *SR && Reg < 0; ++SR) { |
Rafael Espindola | 37afca1 | 2011-05-27 22:15:01 +0000 | [diff] [blame] | 789 | Reg = TRI->getDwarfRegNum(*SR, false); |
| 790 | // FIXME: Get the bit range this register uses of the superregister |
| 791 | // so that we can produce a DW_OP_bit_piece |
| 792 | } |
| 793 | |
| 794 | // FIXME: Handle cases like a super register being encoded as |
| 795 | // DW_OP_reg 32 DW_OP_piece 4 DW_OP_reg 33 |
| 796 | |
| 797 | // FIXME: We have no reasonable way of handling errors in here. The |
| 798 | // caller might be in the middle of an dwarf expression. We should |
| 799 | // probably assert that Reg >= 0 once debug info generation is more mature. |
| 800 | |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 801 | if (int Offset = MLoc.getOffset()) { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 802 | if (Reg < 32) { |
| 803 | OutStreamer.AddComment( |
| 804 | dwarf::OperationEncodingString(dwarf::DW_OP_breg0 + Reg)); |
| 805 | EmitInt8(dwarf::DW_OP_breg0 + Reg); |
| 806 | } else { |
| 807 | OutStreamer.AddComment("DW_OP_bregx"); |
| 808 | EmitInt8(dwarf::DW_OP_bregx); |
| 809 | OutStreamer.AddComment(Twine(Reg)); |
| 810 | EmitULEB128(Reg); |
| 811 | } |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 812 | EmitSLEB128(Offset); |
| 813 | } else { |
| 814 | if (Reg < 32) { |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 815 | OutStreamer.AddComment( |
| 816 | dwarf::OperationEncodingString(dwarf::DW_OP_reg0 + Reg)); |
| 817 | EmitInt8(dwarf::DW_OP_reg0 + Reg); |
| 818 | } else { |
Devang Patel | c26f544 | 2011-04-28 02:22:40 +0000 | [diff] [blame] | 819 | OutStreamer.AddComment("DW_OP_regx"); |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 820 | EmitInt8(dwarf::DW_OP_regx); |
| 821 | OutStreamer.AddComment(Twine(Reg)); |
| 822 | EmitULEB128(Reg); |
| 823 | } |
| 824 | } |
Rafael Espindola | 37afca1 | 2011-05-27 22:15:01 +0000 | [diff] [blame] | 825 | |
| 826 | // FIXME: Produce a DW_OP_bit_piece if we used a superregister |
Devang Patel | acc381b | 2011-04-21 21:07:35 +0000 | [diff] [blame] | 827 | } |
| 828 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 829 | bool AsmPrinter::doFinalization(Module &M) { |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 830 | // Emit global variables. |
| 831 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 832 | I != E; ++I) |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 833 | EmitGlobalVariable(I); |
Rafael Espindola | 1ffb533 | 2011-01-28 03:20:10 +0000 | [diff] [blame] | 834 | |
| 835 | // Emit visibility info for declarations |
| 836 | for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) { |
| 837 | const Function &F = *I; |
| 838 | if (!F.isDeclaration()) |
| 839 | continue; |
| 840 | GlobalValue::VisibilityTypes V = F.getVisibility(); |
| 841 | if (V == GlobalValue::DefaultVisibility) |
| 842 | continue; |
| 843 | |
| 844 | MCSymbol *Name = Mang->getSymbol(&F); |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 845 | EmitVisibility(Name, V, false); |
Rafael Espindola | 1ffb533 | 2011-01-28 03:20:10 +0000 | [diff] [blame] | 846 | } |
| 847 | |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 848 | // Finalize debug and EH information. |
| 849 | if (DE) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 850 | { |
| 851 | NamedRegionTimer T(EHTimerName, DWARFGroupName, TimePassesIsEnabled); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 852 | DE->EndModule(); |
| 853 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 854 | delete DE; DE = 0; |
| 855 | } |
| 856 | if (DD) { |
Dan Gohman | 03c3dc7 | 2010-06-18 15:56:31 +0000 | [diff] [blame] | 857 | { |
| 858 | NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); |
Torok Edwin | 9c42107 | 2010-04-07 10:44:46 +0000 | [diff] [blame] | 859 | DD->endModule(); |
| 860 | } |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 861 | delete DD; DD = 0; |
| 862 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 863 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 864 | // If the target wants to know about weak references, print them all. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 865 | if (MAI->getWeakRefDirective()) { |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 866 | // FIXME: This is not lazy, it would be nice to only print weak references |
| 867 | // to stuff that is actually used. Note that doing so would require targets |
| 868 | // to notice uses in operands (due to constant exprs etc). This should |
| 869 | // happen with the MC stuff eventually. |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 870 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 871 | // Print out module-level global variables here. |
| 872 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 873 | I != E; ++I) { |
Chris Lattner | 08ce3b4 | 2010-01-16 18:17:26 +0000 | [diff] [blame] | 874 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 875 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 876 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 877 | |
Chris Lattner | c6fdced | 2009-08-03 23:10:34 +0000 | [diff] [blame] | 878 | 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] | 879 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 880 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 881 | } |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 882 | } |
| 883 | |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 884 | if (MAI->hasSetDirective()) { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 885 | OutStreamer.AddBlankLine(); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 886 | 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] | 887 | I != E; ++I) { |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 888 | MCSymbol *Name = Mang->getSymbol(I); |
Anton Korobeynikov | 325be7c | 2007-09-06 17:21:48 +0000 | [diff] [blame] | 889 | |
Jay Foad | b899d95 | 2011-08-01 12:27:15 +0000 | [diff] [blame] | 890 | const GlobalValue *GV = I->getAliasedGlobal(); |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 891 | MCSymbol *Target = Mang->getSymbol(GV); |
Anton Korobeynikov | 541af7f | 2008-09-24 22:21:04 +0000 | [diff] [blame] | 892 | |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 893 | if (I->hasExternalLinkage() || !MAI->getWeakRefDirective()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 894 | OutStreamer.EmitSymbolAttribute(Name, MCSA_Global); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 895 | else if (I->hasWeakLinkage()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 896 | OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 897 | else |
Chris Lattner | 1059549 | 2010-01-16 01:37:14 +0000 | [diff] [blame] | 898 | assert(I->hasLocalLinkage() && "Invalid alias linkage"); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 899 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 900 | EmitVisibility(Name, I->getVisibility()); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 901 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 902 | // Emit the directives as assignments aka .set: |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 903 | OutStreamer.EmitAssignment(Name, |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 904 | MCSymbolRefExpr::Create(Target, OutContext)); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 905 | } |
| 906 | } |
| 907 | |
Duncan Sands | 1465d61 | 2009-01-28 13:14:17 +0000 | [diff] [blame] | 908 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 909 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
| 910 | for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; ) |
| 911 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 912 | MP->finishAssembly(*this); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 913 | |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 914 | // If we don't have any trampolines, then we don't require stack memory |
| 915 | // to be executable. Some targets have a directive to declare this. |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 916 | Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline"); |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 917 | if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty()) |
Chris Lattner | 74aae47 | 2010-04-08 21:26:26 +0000 | [diff] [blame] | 918 | if (const MCSection *S = MAI->getNonexecutableStackSection(OutContext)) |
Chris Lattner | f9f93e4 | 2010-01-23 07:21:06 +0000 | [diff] [blame] | 919 | OutStreamer.SwitchSection(S); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 920 | |
Chris Lattner | bd23d5f | 2009-09-18 20:17:03 +0000 | [diff] [blame] | 921 | // Allow the target to emit any magic that it wants at the end of the file, |
| 922 | // after everything else has gone out. |
| 923 | EmitEndOfAsmFile(M); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 924 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 925 | delete Mang; Mang = 0; |
Chris Lattner | 49cd664 | 2010-04-05 05:11:15 +0000 | [diff] [blame] | 926 | MMI = 0; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 927 | |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 928 | OutStreamer.Finish(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 929 | return false; |
| 930 | } |
| 931 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 932 | void AsmPrinter::SetupMachineFunction(MachineFunction &MF) { |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 933 | this->MF = &MF; |
Chris Lattner | 412c3a5 | 2010-01-16 01:24:10 +0000 | [diff] [blame] | 934 | // Get the function symbol. |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 935 | CurrentFnSym = Mang->getSymbol(MF.getFunction()); |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 936 | |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 937 | if (isVerbose()) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 938 | LI = &getAnalysis<MachineLoopInfo>(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 939 | } |
| 940 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 941 | namespace { |
| 942 | // SectionCPs - Keep track the alignment, constpool entries per Section. |
| 943 | struct SectionCPs { |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 944 | const MCSection *S; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 945 | unsigned Alignment; |
| 946 | SmallVector<unsigned, 4> CPEs; |
Douglas Gregor | cabdd74 | 2009-12-19 07:05:23 +0000 | [diff] [blame] | 947 | SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {} |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 948 | }; |
| 949 | } |
| 950 | |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 951 | /// EmitConstantPool - Print to the current output stream assembly |
| 952 | /// representations of the constants in the constant pool MCP. This is |
| 953 | /// used to print out constants which have been "spilled to memory" by |
| 954 | /// the code generator. |
| 955 | /// |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 956 | void AsmPrinter::EmitConstantPool() { |
| 957 | const MachineConstantPool *MCP = MF->getConstantPool(); |
Chris Lattner | fa77d43 | 2006-02-09 04:22:52 +0000 | [diff] [blame] | 958 | const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants(); |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 959 | if (CP.empty()) return; |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 960 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 961 | // Calculate sections for constant pool entries. We collect entries to go into |
| 962 | // the same section together to reduce amount of section switch statements. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 963 | SmallVector<SectionCPs, 4> CPSections; |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 964 | for (unsigned i = 0, e = CP.size(); i != e; ++i) { |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 965 | const MachineConstantPoolEntry &CPE = CP[i]; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 966 | unsigned Align = CPE.getAlignment(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 967 | |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 968 | SectionKind Kind; |
| 969 | switch (CPE.getRelocationInfo()) { |
| 970 | default: llvm_unreachable("Unknown section kind"); |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 971 | case 2: Kind = SectionKind::getReadOnlyWithRel(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 972 | case 1: |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 973 | Kind = SectionKind::getReadOnlyWithRelLocal(); |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 974 | break; |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 975 | case 0: |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 976 | switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) { |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 977 | case 4: Kind = SectionKind::getMergeableConst4(); break; |
| 978 | case 8: Kind = SectionKind::getMergeableConst8(); break; |
| 979 | case 16: Kind = SectionKind::getMergeableConst16();break; |
| 980 | default: Kind = SectionKind::getMergeableConst(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 981 | } |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 982 | } |
| 983 | |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 984 | const MCSection *S = getObjFileLowering().getSectionForConstant(Kind); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 985 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 986 | // The number of sections are small, just do a linear search from the |
| 987 | // last section to the first. |
| 988 | bool Found = false; |
| 989 | unsigned SecIdx = CPSections.size(); |
| 990 | while (SecIdx != 0) { |
| 991 | if (CPSections[--SecIdx].S == S) { |
| 992 | Found = true; |
| 993 | break; |
| 994 | } |
| 995 | } |
| 996 | if (!Found) { |
| 997 | SecIdx = CPSections.size(); |
| 998 | CPSections.push_back(SectionCPs(S, Align)); |
| 999 | } |
| 1000 | |
| 1001 | if (Align > CPSections[SecIdx].Alignment) |
| 1002 | CPSections[SecIdx].Alignment = Align; |
| 1003 | CPSections[SecIdx].CPEs.push_back(i); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 1004 | } |
| 1005 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 1006 | // Now print stuff into the calculated sections. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1007 | for (unsigned i = 0, e = CPSections.size(); i != e; ++i) { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1008 | OutStreamer.SwitchSection(CPSections[i].S); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1009 | EmitAlignment(Log2_32(CPSections[i].Alignment)); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 1010 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1011 | unsigned Offset = 0; |
| 1012 | for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) { |
| 1013 | unsigned CPI = CPSections[i].CPEs[j]; |
| 1014 | MachineConstantPoolEntry CPE = CP[CPI]; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 1015 | |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 1016 | // Emit inter-object padding for alignment. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1017 | unsigned AlignMask = CPE.getAlignment() - 1; |
| 1018 | unsigned NewOffset = (Offset + AlignMask) & ~AlignMask; |
Chris Lattner | aaec205 | 2010-01-19 19:46:13 +0000 | [diff] [blame] | 1019 | OutStreamer.EmitFill(NewOffset - Offset, 0/*fillval*/, 0/*addrspace*/); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1020 | |
Chris Lattner | db125cf | 2011-07-18 04:54:35 +0000 | [diff] [blame] | 1021 | Type *Ty = CPE.getType(); |
Duncan Sands | 777d230 | 2009-05-09 07:06:46 +0000 | [diff] [blame] | 1022 | Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1023 | OutStreamer.EmitLabel(GetCPISymbol(CPI)); |
| 1024 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 1025 | if (CPE.isMachineConstantPoolEntry()) |
| 1026 | EmitMachineConstantPoolValue(CPE.Val.MachineCPVal); |
| 1027 | else |
| 1028 | EmitGlobalConstant(CPE.Val.ConstVal); |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 1029 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 1030 | } |
| 1031 | } |
| 1032 | |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1033 | /// EmitJumpTableInfo - Print assembly representations of the jump tables used |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1034 | /// by the current function to the current output stream. |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1035 | /// |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1036 | void AsmPrinter::EmitJumpTableInfo() { |
| 1037 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
Chris Lattner | 44e8725 | 2010-01-25 22:41:33 +0000 | [diff] [blame] | 1038 | if (MJTI == 0) return; |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 1039 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return; |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1040 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 1041 | if (JT.empty()) return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1042 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1043 | // 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] | 1044 | // the appropriate section. |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1045 | const Function *F = MF->getFunction(); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 1046 | bool JTInDiffSection = false; |
Chris Lattner | f1214cb | 2010-01-26 06:53:37 +0000 | [diff] [blame] | 1047 | if (// In PIC mode, we need to emit the jump table to the same section as the |
| 1048 | // function body itself, otherwise the label differences won't make sense. |
| 1049 | // FIXME: Need a better predicate for this: what about custom entries? |
| 1050 | MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 || |
| 1051 | // We should also do if the section name is NULL or function is declared |
| 1052 | // in discardable section |
| 1053 | // FIXME: this isn't the right predicate, should be based on the MCSection |
| 1054 | // for the function. |
| 1055 | F->isWeakForLinker()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1056 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM)); |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1057 | } else { |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 1058 | // Otherwise, drop it in the readonly section. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1059 | const MCSection *ReadOnlySection = |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 1060 | getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly()); |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1061 | OutStreamer.SwitchSection(ReadOnlySection); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 1062 | JTInDiffSection = true; |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 1063 | } |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1064 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1065 | EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getTargetData()))); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1066 | |
Owen Anderson | 2fec6c5 | 2011-10-04 23:26:17 +0000 | [diff] [blame] | 1067 | // If we know the form of the jump table, go ahead and tag it as such. |
| 1068 | if (!JTInDiffSection) { |
| 1069 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32) { |
| 1070 | OutStreamer.EmitJumpTable32Region(); |
| 1071 | } else { |
| 1072 | OutStreamer.EmitDataRegion(); |
| 1073 | } |
| 1074 | } |
| 1075 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1076 | for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) { |
| 1077 | const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1078 | |
| 1079 | // If this jump table was deleted, ignore it. |
Chris Lattner | 0737188 | 2006-10-28 18:10:06 +0000 | [diff] [blame] | 1080 | if (JTBBs.empty()) continue; |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 1081 | |
Chris Lattner | e35df92 | 2010-01-26 05:15:20 +0000 | [diff] [blame] | 1082 | // For the EK_LabelDifference32 entry, if the target supports .set, emit a |
| 1083 | // .set directive for each unique entry. This reduces the number of |
| 1084 | // relocations the assembler will generate for the jump table. |
| 1085 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 && |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 1086 | MAI->hasSetDirective()) { |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1087 | SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets; |
| 1088 | const TargetLowering *TLI = TM.getTargetLowering(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 1089 | const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1090 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) { |
| 1091 | const MachineBasicBlock *MBB = JTBBs[ii]; |
| 1092 | if (!EmittedSets.insert(MBB)) continue; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1093 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 1094 | // .set LJTSet, LBB32-base |
| 1095 | const MCExpr *LHS = |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1096 | MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 1097 | OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()), |
| 1098 | MCBinaryExpr::CreateSub(LHS, Base, OutContext)); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1099 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1100 | } |
| 1101 | |
Duncan Sands | ab4c366 | 2011-02-15 09:23:02 +0000 | [diff] [blame] | 1102 | // 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] | 1103 | // before each jump table. The first label is never referenced, but tells |
| 1104 | // the assembler and linker the extents of the jump table object. The |
| 1105 | // second label is actually referenced by the code. |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1106 | if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0]) |
Chris Lattner | beeb93e | 2010-01-26 05:58:28 +0000 | [diff] [blame] | 1107 | // FIXME: This doesn't have to have any specific name, just any randomly |
| 1108 | // named and numbered 'l' label would work. Simplify GetJTISymbol. |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1109 | OutStreamer.EmitLabel(GetJTISymbol(JTI, true)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1110 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1111 | OutStreamer.EmitLabel(GetJTISymbol(JTI)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1112 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1113 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 1114 | EmitJumpTableEntry(MJTI, JTBBs[ii], JTI); |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1115 | } |
| 1116 | } |
| 1117 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1118 | /// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the |
| 1119 | /// current stream. |
| 1120 | void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 1121 | const MachineBasicBlock *MBB, |
| 1122 | unsigned UID) const { |
Jakob Stoklund Olesen | e5005d0 | 2011-02-09 21:52:06 +0000 | [diff] [blame] | 1123 | assert(MBB && MBB->getNumber() >= 0 && "Invalid basic block"); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1124 | const MCExpr *Value = 0; |
| 1125 | switch (MJTI->getEntryKind()) { |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 1126 | case MachineJumpTableInfo::EK_Inline: |
| 1127 | llvm_unreachable("Cannot emit EK_Inline jump table entry"); break; |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1128 | case MachineJumpTableInfo::EK_Custom32: |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1129 | Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID, |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1130 | OutContext); |
| 1131 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1132 | case MachineJumpTableInfo::EK_BlockAddress: |
| 1133 | // EK_BlockAddress - Each entry is a plain address of block, e.g.: |
| 1134 | // .word LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1135 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1136 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1137 | case MachineJumpTableInfo::EK_GPRel32BlockAddress: { |
| 1138 | // EK_GPRel32BlockAddress - Each entry is an address of block, encoded |
| 1139 | // with a relocation as gp-relative, e.g.: |
| 1140 | // .gprel32 LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1141 | MCSymbol *MBBSym = MBB->getSymbol(); |
Chris Lattner | 718fb59 | 2010-01-25 21:28:50 +0000 | [diff] [blame] | 1142 | OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext)); |
Chris Lattner | 78f485a | 2010-01-25 21:10:10 +0000 | [diff] [blame] | 1143 | return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1144 | } |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 1145 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1146 | case MachineJumpTableInfo::EK_LabelDifference32: { |
| 1147 | // EK_LabelDifference32 - Each entry is the address of the block minus |
| 1148 | // the address of the jump table. This is used for PIC jump tables where |
| 1149 | // gprel32 is not supported. e.g.: |
| 1150 | // .word LBB123 - LJTI1_2 |
| 1151 | // If the .set directive is supported, this is emitted as: |
| 1152 | // .set L4_5_set_123, LBB123 - LJTI1_2 |
| 1153 | // .word L4_5_set_123 |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1154 | |
| 1155 | // If we have emitted set directives for the jump table entries, print |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1156 | // them rather than the entries themselves. If we're emitting PIC, then |
| 1157 | // emit the table entries as differences between two text section labels. |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 1158 | if (MAI->hasSetDirective()) { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1159 | // If we used .set, reference the .set's symbol. |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1160 | Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()), |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1161 | OutContext); |
| 1162 | break; |
| 1163 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 1164 | // Otherwise, use the difference as the jump table entry. |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1165 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 1166 | const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1167 | Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext); |
| 1168 | break; |
| 1169 | } |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1170 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1171 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1172 | assert(Value && "Unknown entry kind!"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1173 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 1174 | unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData()); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 1175 | OutStreamer.EmitValue(Value, EntrySize, /*addrspace*/0); |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 1176 | } |
| 1177 | |
| 1178 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1179 | /// EmitSpecialLLVMGlobal - Check to see if the specified global is a |
| 1180 | /// special global used by LLVM. If so, emit it and return true, otherwise |
| 1181 | /// do nothing and return false. |
| 1182 | bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) { |
Daniel Dunbar | 03d7651 | 2009-07-25 23:55:21 +0000 | [diff] [blame] | 1183 | if (GV->getName() == "llvm.used") { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1184 | if (MAI->hasNoDeadStrip()) // No need to emit this at all. |
Andrew Lenharth | b753a9b | 2007-08-22 19:33:11 +0000 | [diff] [blame] | 1185 | EmitLLVMUsedList(GV->getInitializer()); |
| 1186 | return true; |
| 1187 | } |
| 1188 | |
Chris Lattner | 401e10c | 2009-07-20 06:14:25 +0000 | [diff] [blame] | 1189 | // Ignore debug and non-emitted data. This handles llvm.compiler.used. |
Chris Lattner | 266c7bb | 2009-04-13 05:44:34 +0000 | [diff] [blame] | 1190 | if (GV->getSection() == "llvm.metadata" || |
| 1191 | GV->hasAvailableExternallyLinkage()) |
| 1192 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1193 | |
Jim Laskey | 7809811 | 2006-03-07 22:00:35 +0000 | [diff] [blame] | 1194 | if (!GV->hasAppendingLinkage()) return false; |
| 1195 | |
| 1196 | assert(GV->hasInitializer() && "Not a special LLVM global!"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1197 | |
Evan Cheng | 916d07c | 2007-06-04 20:39:18 +0000 | [diff] [blame] | 1198 | const TargetData *TD = TM.getTargetData(); |
| 1199 | unsigned Align = Log2_32(TD->getPointerPrefAlignment()); |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 1200 | if (GV->getName() == "llvm.global_ctors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1201 | OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection()); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1202 | EmitAlignment(Align); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1203 | EmitXXStructorList(GV->getInitializer()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1204 | |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 1205 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1206 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 1207 | StringRef Sym(".constructors_used"); |
| 1208 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 1209 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1210 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1211 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1212 | } |
| 1213 | |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 1214 | if (GV->getName() == "llvm.global_dtors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 1215 | OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection()); |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1216 | EmitAlignment(Align); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1217 | EmitXXStructorList(GV->getInitializer()); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 1218 | |
| 1219 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1220 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 1221 | StringRef Sym(".destructors_used"); |
| 1222 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 1223 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1224 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 1225 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1226 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1227 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1228 | return false; |
| 1229 | } |
| 1230 | |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 1231 | /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each |
Dale Johannesen | d2e51af | 2008-09-09 22:29:13 +0000 | [diff] [blame] | 1232 | /// global in the specified llvm.used list for which emitUsedDirectiveFor |
| 1233 | /// is true, as being used with this directive. |
Jay Foad | 7d715df | 2011-06-19 18:37:11 +0000 | [diff] [blame] | 1234 | void AsmPrinter::EmitLLVMUsedList(const Constant *List) { |
Dan Gohman | a119de8 | 2009-06-14 23:30:43 +0000 | [diff] [blame] | 1235 | // Should be an array of 'i8*'. |
Jay Foad | 7d715df | 2011-06-19 18:37:11 +0000 | [diff] [blame] | 1236 | const ConstantArray *InitList = dyn_cast<ConstantArray>(List); |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1237 | if (InitList == 0) return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1238 | |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1239 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
Chris Lattner | 16fe990 | 2009-07-17 22:00:23 +0000 | [diff] [blame] | 1240 | const GlobalValue *GV = |
| 1241 | dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts()); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 1242 | if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 1243 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip); |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 1244 | } |
| 1245 | } |
| 1246 | |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1247 | typedef std::pair<int, Constant*> Structor; |
| 1248 | |
Duncan Sands | 9a7d48a | 2011-09-29 16:01:46 +0000 | [diff] [blame] | 1249 | static bool priority_order(const Structor& lhs, const Structor& rhs) { |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1250 | return lhs.first < rhs.first; |
| 1251 | } |
| 1252 | |
| 1253 | /// EmitXXStructorList - Emit the ctor or dtor list taking into account the init |
| 1254 | /// priority. |
Jay Foad | 7d715df | 2011-06-19 18:37:11 +0000 | [diff] [blame] | 1255 | void AsmPrinter::EmitXXStructorList(const Constant *List) { |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1256 | // Should be an array of '{ int, void ()* }' structs. The first value is the |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1257 | // init priority. |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1258 | if (!isa<ConstantArray>(List)) return; |
Chris Lattner | 8de324b | 2005-12-21 01:17:37 +0000 | [diff] [blame] | 1259 | |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1260 | // Sanity check the structors list. |
| 1261 | const ConstantArray *InitList = dyn_cast<ConstantArray>(List); |
| 1262 | if (!InitList) return; // Not an array! |
| 1263 | StructType *ETy = dyn_cast<StructType>(InitList->getType()->getElementType()); |
| 1264 | if (!ETy || ETy->getNumElements() != 2) return; // Not an array of pairs! |
| 1265 | if (!isa<IntegerType>(ETy->getTypeAtIndex(0U)) || |
| 1266 | !isa<PointerType>(ETy->getTypeAtIndex(1U))) return; // Not (int, ptr). |
| 1267 | |
| 1268 | // Gather the structors in a form that's convenient for sorting by priority. |
| 1269 | SmallVector<Structor, 8> Structors; |
| 1270 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
| 1271 | ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i)); |
| 1272 | if (!CS) continue; // Malformed. |
| 1273 | if (CS->getOperand(1)->isNullValue()) |
| 1274 | break; // Found a null terminator, skip the rest. |
| 1275 | ConstantInt *Priority = dyn_cast<ConstantInt>(CS->getOperand(0)); |
| 1276 | if (!Priority) continue; // Malformed. |
| 1277 | Structors.push_back(std::make_pair(Priority->getLimitedValue(65535), |
| 1278 | CS->getOperand(1))); |
| 1279 | } |
| 1280 | |
| 1281 | // Emit the function pointers in reverse priority order. |
Duncan Sands | 147272b | 2011-09-02 18:07:19 +0000 | [diff] [blame] | 1282 | switch (MAI->getStructorOutputOrder()) { |
| 1283 | case Structors::None: |
| 1284 | break; |
| 1285 | case Structors::PriorityOrder: |
| 1286 | std::sort(Structors.begin(), Structors.end(), priority_order); |
| 1287 | break; |
| 1288 | case Structors::ReversePriorityOrder: |
| 1289 | std::sort(Structors.rbegin(), Structors.rend(), priority_order); |
| 1290 | break; |
| 1291 | } |
Duncan Sands | fd9c4f7 | 2011-08-28 13:17:22 +0000 | [diff] [blame] | 1292 | for (unsigned i = 0, e = Structors.size(); i != e; ++i) |
| 1293 | EmitGlobalConstant(Structors[i].second); |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 1294 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 1295 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1296 | //===--------------------------------------------------------------------===// |
| 1297 | // Emission and print routines |
| 1298 | // |
| 1299 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1300 | /// EmitInt8 - Emit a byte directive and value. |
| 1301 | /// |
| 1302 | void AsmPrinter::EmitInt8(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 1303 | OutStreamer.EmitIntValue(Value, 1, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1304 | } |
| 1305 | |
| 1306 | /// EmitInt16 - Emit a short directive and value. |
| 1307 | /// |
| 1308 | void AsmPrinter::EmitInt16(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 1309 | OutStreamer.EmitIntValue(Value, 2, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1310 | } |
| 1311 | |
| 1312 | /// EmitInt32 - Emit a long directive and value. |
| 1313 | /// |
| 1314 | void AsmPrinter::EmitInt32(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 1315 | OutStreamer.EmitIntValue(Value, 4, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1316 | } |
| 1317 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1318 | /// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size |
| 1319 | /// in bytes of the directive is specified by Size and Hi/Lo specify the |
| 1320 | /// labels. This implicitly uses .set if it is available. |
| 1321 | void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo, |
| 1322 | unsigned Size) const { |
| 1323 | // Get the Hi-Lo expression. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1324 | const MCExpr *Diff = |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1325 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext), |
| 1326 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 1327 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1328 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1329 | if (!MAI->hasSetDirective()) { |
| 1330 | OutStreamer.EmitValue(Diff, Size, 0/*AddrSpace*/); |
| 1331 | return; |
| 1332 | } |
| 1333 | |
| 1334 | // Otherwise, emit with .set (aka assignment). |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1335 | MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1336 | OutStreamer.EmitAssignment(SetLabel, Diff); |
Chris Lattner | 6cde3e6 | 2010-03-09 00:39:24 +0000 | [diff] [blame] | 1337 | OutStreamer.EmitSymbolValue(SetLabel, Size, 0/*AddrSpace*/); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1338 | } |
| 1339 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1340 | /// EmitLabelOffsetDifference - Emit something like ".long Hi+Offset-Lo" |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1341 | /// where the size in bytes of the directive is specified by Size and Hi/Lo |
| 1342 | /// specify the labels. This implicitly uses .set if it is available. |
| 1343 | void AsmPrinter::EmitLabelOffsetDifference(const MCSymbol *Hi, uint64_t Offset, |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1344 | const MCSymbol *Lo, unsigned Size) |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1345 | const { |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1346 | |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1347 | // Emit Hi+Offset - Lo |
| 1348 | // Get the Hi+Offset expression. |
| 1349 | const MCExpr *Plus = |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1350 | MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Hi, OutContext), |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1351 | MCConstantExpr::Create(Offset, OutContext), |
| 1352 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1353 | |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1354 | // Get the Hi+Offset-Lo expression. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1355 | const MCExpr *Diff = |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1356 | MCBinaryExpr::CreateSub(Plus, |
| 1357 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 1358 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1359 | |
| 1360 | if (!MAI->hasSetDirective()) |
Devang Patel | f2548ca | 2010-04-16 23:33:45 +0000 | [diff] [blame] | 1361 | OutStreamer.EmitValue(Diff, 4, 0/*AddrSpace*/); |
| 1362 | else { |
| 1363 | // Otherwise, emit with .set (aka assignment). |
| 1364 | MCSymbol *SetLabel = GetTempSymbol("set", SetCounter++); |
| 1365 | OutStreamer.EmitAssignment(SetLabel, Diff); |
| 1366 | OutStreamer.EmitSymbolValue(SetLabel, 4, 0/*AddrSpace*/); |
| 1367 | } |
| 1368 | } |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1369 | |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1370 | /// EmitLabelPlusOffset - Emit something like ".long Label+Offset" |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1371 | /// where the size in bytes of the directive is specified by Size and Label |
| 1372 | /// specifies the label. This implicitly uses .set if it is available. |
| 1373 | void AsmPrinter::EmitLabelPlusOffset(const MCSymbol *Label, uint64_t Offset, |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1374 | unsigned Size) |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1375 | const { |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1376 | |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1377 | // Emit Label+Offset |
| 1378 | const MCExpr *Plus = |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1379 | MCBinaryExpr::CreateAdd(MCSymbolRefExpr::Create(Label, OutContext), |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1380 | MCConstantExpr::Create(Offset, OutContext), |
| 1381 | OutContext); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1382 | |
Devang Patel | a660be7 | 2010-09-02 23:01:10 +0000 | [diff] [blame] | 1383 | OutStreamer.EmitValue(Plus, 4, 0/*AddrSpace*/); |
Devang Patel | b1fcfbe | 2010-09-02 16:43:44 +0000 | [diff] [blame] | 1384 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1385 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 1386 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 1387 | //===----------------------------------------------------------------------===// |
| 1388 | |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 1389 | // EmitAlignment - Emit an alignment directive to the specified power of |
| 1390 | // two boundary. For example, if you pass in 3 here, you will get an 8 |
| 1391 | // 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] | 1392 | // an explicit alignment requested, it will override the alignment request |
| 1393 | // if required for correctness. |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 1394 | // |
Chris Lattner | a7b611c | 2010-04-28 01:08:40 +0000 | [diff] [blame] | 1395 | void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const { |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1396 | if (GV) NumBits = getGVAlignmentLog2(GV, *TM.getTargetData(), NumBits); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1397 | |
Chris Lattner | e87f7bb | 2010-04-28 19:58:07 +0000 | [diff] [blame] | 1398 | if (NumBits == 0) return; // 1-byte aligned: no need to emit alignment. |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1399 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 1400 | if (getCurrentSection()->getKind().isText()) |
Chris Lattner | 2cce371 | 2010-02-23 18:46:22 +0000 | [diff] [blame] | 1401 | OutStreamer.EmitCodeAlignment(1 << NumBits); |
| 1402 | else |
| 1403 | OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0); |
Chris Lattner | bfddc20 | 2004-08-17 19:14:29 +0000 | [diff] [blame] | 1404 | } |
David Greene | a5bb59f | 2009-08-05 21:00:52 +0000 | [diff] [blame] | 1405 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1406 | //===----------------------------------------------------------------------===// |
| 1407 | // Constant emission. |
| 1408 | //===----------------------------------------------------------------------===// |
| 1409 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1410 | /// LowerConstant - Lower the specified LLVM Constant to an MCExpr. |
| 1411 | /// |
| 1412 | static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) { |
| 1413 | MCContext &Ctx = AP.OutContext; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1414 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1415 | if (CV->isNullValue() || isa<UndefValue>(CV)) |
| 1416 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1417 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1418 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) |
| 1419 | return MCConstantExpr::Create(CI->getZExtValue(), Ctx); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1420 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1421 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 1422 | return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx); |
Bill Wendling | 3d7ff08 | 2010-08-18 18:41:13 +0000 | [diff] [blame] | 1423 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1424 | if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) |
| 1425 | return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1426 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1427 | const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV); |
| 1428 | if (CE == 0) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1429 | llvm_unreachable("Unknown constant value to lower!"); |
| 1430 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1431 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1432 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1433 | switch (CE->getOpcode()) { |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1434 | default: |
| 1435 | // If the code isn't optimized, there may be outstanding folding |
| 1436 | // opportunities. Attempt to fold the expression using TargetData as a |
| 1437 | // last resort before giving up. |
Dan Gohman | 54e72ec | 2010-02-08 22:19:11 +0000 | [diff] [blame] | 1438 | if (Constant *C = |
| 1439 | ConstantFoldConstantExpression(CE, AP.TM.getTargetData())) |
| 1440 | if (C != CE) |
| 1441 | return LowerConstant(C, AP); |
Dan Gohman | 9f6a6862 | 2010-08-04 18:51:09 +0000 | [diff] [blame] | 1442 | |
| 1443 | // Otherwise report the problem to the user. |
| 1444 | { |
| 1445 | std::string S; |
| 1446 | raw_string_ostream OS(S); |
| 1447 | OS << "Unsupported expression in static initializer: "; |
| 1448 | WriteAsOperand(OS, CE, /*PrintType=*/false, |
| 1449 | !AP.MF ? 0 : AP.MF->getFunction()->getParent()); |
| 1450 | report_fatal_error(OS.str()); |
| 1451 | } |
| 1452 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1453 | case Instruction::GetElementPtr: { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1454 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1455 | // Generate a symbolic expression for the byte address |
| 1456 | const Constant *PtrVal = CE->getOperand(0); |
| 1457 | SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end()); |
Jay Foad | 8fbbb39 | 2011-07-19 14:01:37 +0000 | [diff] [blame] | 1458 | int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), IdxVec); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1459 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1460 | const MCExpr *Base = LowerConstant(CE->getOperand(0), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1461 | if (Offset == 0) |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1462 | return Base; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1463 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1464 | // Truncate/sext the offset to the pointer size. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1465 | if (TD.getPointerSizeInBits() != 64) { |
| 1466 | int SExtAmount = 64-TD.getPointerSizeInBits(); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1467 | Offset = (Offset << SExtAmount) >> SExtAmount; |
| 1468 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1469 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1470 | return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx), |
| 1471 | Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1472 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1473 | |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1474 | case Instruction::Trunc: |
| 1475 | // We emit the value and depend on the assembler to truncate the generated |
| 1476 | // expression properly. This is important for differences between |
| 1477 | // blockaddress labels. Since the two labels are in the same function, it |
| 1478 | // is reasonable to treat their delta as a 32-bit value. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1479 | // FALL THROUGH. |
| 1480 | case Instruction::BitCast: |
| 1481 | return LowerConstant(CE->getOperand(0), AP); |
| 1482 | |
| 1483 | case Instruction::IntToPtr: { |
| 1484 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1485 | // Handle casts to pointers by changing them into casts to the appropriate |
| 1486 | // integer type. This promotes constant folding and simplifies this code. |
| 1487 | Constant *Op = CE->getOperand(0); |
| 1488 | Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()), |
| 1489 | false/*ZExt*/); |
| 1490 | return LowerConstant(Op, AP); |
| 1491 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1492 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1493 | case Instruction::PtrToInt: { |
| 1494 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1495 | // Support only foldable casts to/from pointers that can be eliminated by |
| 1496 | // changing the pointer to the appropriately sized integer type. |
| 1497 | Constant *Op = CE->getOperand(0); |
Chris Lattner | db125cf | 2011-07-18 04:54:35 +0000 | [diff] [blame] | 1498 | Type *Ty = CE->getType(); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1499 | |
| 1500 | const MCExpr *OpExpr = LowerConstant(Op, AP); |
| 1501 | |
| 1502 | // We can emit the pointer value into this slot if the slot is an |
| 1503 | // integer slot equal to the size of the pointer. |
| 1504 | if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType())) |
| 1505 | return OpExpr; |
| 1506 | |
| 1507 | // Otherwise the pointer is smaller than the resultant integer, mask off |
| 1508 | // the high bits so we are sure to get a proper truncation if the input is |
| 1509 | // a constant expr. |
| 1510 | unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType()); |
| 1511 | const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx); |
| 1512 | return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx); |
| 1513 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1514 | |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1515 | // The MC library also has a right-shift operator, but it isn't consistently |
| 1516 | // signed or unsigned between different targets. |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1517 | case Instruction::Add: |
| 1518 | case Instruction::Sub: |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1519 | case Instruction::Mul: |
| 1520 | case Instruction::SDiv: |
| 1521 | case Instruction::SRem: |
| 1522 | case Instruction::Shl: |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1523 | case Instruction::And: |
| 1524 | case Instruction::Or: |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1525 | case Instruction::Xor: { |
| 1526 | const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP); |
| 1527 | const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1528 | switch (CE->getOpcode()) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1529 | default: llvm_unreachable("Unknown binary operator constant cast expr"); |
| 1530 | case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx); |
| 1531 | case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx); |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1532 | case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx); |
| 1533 | case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx); |
| 1534 | case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx); |
| 1535 | case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1536 | case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx); |
| 1537 | case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx); |
| 1538 | case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1539 | } |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1540 | } |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 1541 | } |
| 1542 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1543 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1544 | static void EmitGlobalConstantImpl(const Constant *C, unsigned AddrSpace, |
| 1545 | AsmPrinter &AP); |
| 1546 | |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1547 | /// isRepeatedByteSequence - Determine whether the given value is |
| 1548 | /// composed of a repeated sequence of identical bytes and return the |
| 1549 | /// byte value. If it is not a repeated sequence, return -1. |
| 1550 | static int isRepeatedByteSequence(const Value *V, TargetMachine &TM) { |
| 1551 | |
| 1552 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) { |
| 1553 | if (CI->getBitWidth() > 64) return -1; |
| 1554 | |
| 1555 | uint64_t Size = TM.getTargetData()->getTypeAllocSize(V->getType()); |
| 1556 | uint64_t Value = CI->getZExtValue(); |
| 1557 | |
| 1558 | // Make sure the constant is at least 8 bits long and has a power |
| 1559 | // of 2 bit width. This guarantees the constant bit width is |
| 1560 | // always a multiple of 8 bits, avoiding issues with padding out |
| 1561 | // to Size and other such corner cases. |
| 1562 | if (CI->getBitWidth() < 8 || !isPowerOf2_64(CI->getBitWidth())) return -1; |
| 1563 | |
| 1564 | uint8_t Byte = static_cast<uint8_t>(Value); |
| 1565 | |
| 1566 | for (unsigned i = 1; i < Size; ++i) { |
| 1567 | Value >>= 8; |
| 1568 | if (static_cast<uint8_t>(Value) != Byte) return -1; |
| 1569 | } |
| 1570 | return Byte; |
| 1571 | } |
| 1572 | if (const ConstantArray *CA = dyn_cast<ConstantArray>(V)) { |
| 1573 | // Make sure all array elements are sequences of the same repeated |
| 1574 | // byte. |
| 1575 | if (CA->getNumOperands() == 0) return -1; |
| 1576 | |
| 1577 | int Byte = isRepeatedByteSequence(CA->getOperand(0), TM); |
| 1578 | if (Byte == -1) return -1; |
| 1579 | |
| 1580 | for (unsigned i = 1, e = CA->getNumOperands(); i != e; ++i) { |
| 1581 | int ThisByte = isRepeatedByteSequence(CA->getOperand(i), TM); |
| 1582 | if (ThisByte == -1) return -1; |
| 1583 | if (Byte != ThisByte) return -1; |
| 1584 | } |
| 1585 | return Byte; |
| 1586 | } |
| 1587 | |
| 1588 | return -1; |
| 1589 | } |
| 1590 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1591 | static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace, |
| 1592 | AsmPrinter &AP) { |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1593 | if (AddrSpace != 0 || !CA->isString()) { |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1594 | // Not a string. Print the values in successive locations. |
| 1595 | |
| 1596 | // See if we can aggregate some values. Make sure it can be |
| 1597 | // represented as a series of bytes of the constant value. |
| 1598 | int Value = isRepeatedByteSequence(CA, AP.TM); |
| 1599 | |
| 1600 | if (Value != -1) { |
David Greene | 94fca83 | 2011-08-31 21:34:20 +0000 | [diff] [blame] | 1601 | uint64_t Bytes = AP.TM.getTargetData()->getTypeAllocSize(CA->getType()); |
David Greene | d92e2e4 | 2011-08-31 17:30:56 +0000 | [diff] [blame] | 1602 | AP.OutStreamer.EmitFill(Bytes, Value, AddrSpace); |
| 1603 | } |
| 1604 | else { |
| 1605 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1606 | EmitGlobalConstantImpl(CA->getOperand(i), AddrSpace, AP); |
| 1607 | } |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1608 | return; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1609 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1610 | |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1611 | // Otherwise, it can be emitted as .ascii. |
| 1612 | SmallVector<char, 128> TmpVec; |
| 1613 | TmpVec.reserve(CA->getNumOperands()); |
| 1614 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1615 | TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue()); |
| 1616 | |
| 1617 | AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1618 | } |
| 1619 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1620 | static void EmitGlobalConstantVector(const ConstantVector *CV, |
| 1621 | unsigned AddrSpace, AsmPrinter &AP) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1622 | for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1623 | EmitGlobalConstantImpl(CV->getOperand(i), AddrSpace, AP); |
Nick Lewycky | 5b7ac14 | 2011-06-22 18:55:03 +0000 | [diff] [blame] | 1624 | |
| 1625 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1626 | unsigned Size = TD.getTypeAllocSize(CV->getType()); |
| 1627 | unsigned EmittedSize = TD.getTypeAllocSize(CV->getType()->getElementType()) * |
| 1628 | CV->getType()->getNumElements(); |
| 1629 | if (unsigned Padding = Size - EmittedSize) |
| 1630 | AP.OutStreamer.EmitZeros(Padding, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1631 | } |
| 1632 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1633 | static void EmitGlobalConstantStruct(const ConstantStruct *CS, |
| 1634 | unsigned AddrSpace, AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1635 | // Print the fields in successive locations. Pad to align if needed! |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1636 | const TargetData *TD = AP.TM.getTargetData(); |
| 1637 | unsigned Size = TD->getTypeAllocSize(CS->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1638 | const StructLayout *Layout = TD->getStructLayout(CS->getType()); |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1639 | uint64_t SizeSoFar = 0; |
| 1640 | for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1641 | const Constant *Field = CS->getOperand(i); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1642 | |
| 1643 | // Check if padding is needed and insert one or more 0s. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1644 | uint64_t FieldSize = TD->getTypeAllocSize(Field->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1645 | uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1)) |
| 1646 | - Layout->getElementOffset(i)) - FieldSize; |
| 1647 | SizeSoFar += FieldSize + PadSize; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1648 | |
| 1649 | // Now print the actual field value. |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1650 | EmitGlobalConstantImpl(Field, AddrSpace, AP); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1651 | |
| 1652 | // Insert padding - this may include padding to increase the size of the |
| 1653 | // current field up to the ABI size (if the struct is not packed) as well |
| 1654 | // 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] | 1655 | AP.OutStreamer.EmitZeros(PadSize, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1656 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1657 | assert(SizeSoFar == Layout->getSizeInBytes() && |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1658 | "Layout of constant struct may be incorrect!"); |
| 1659 | } |
| 1660 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1661 | static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace, |
| 1662 | AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1663 | // FP Constants are printed as integer constants to avoid losing |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1664 | // precision. |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1665 | if (CFP->getType()->isDoubleTy()) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1666 | if (AP.isVerbose()) { |
Chris Lattner | d79d9dc | 2010-01-22 19:17:48 +0000 | [diff] [blame] | 1667 | double Val = CFP->getValueAPF().convertToDouble(); |
| 1668 | AP.OutStreamer.GetCommentOS() << "double " << Val << '\n'; |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1669 | } |
| 1670 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1671 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1672 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1673 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1674 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1675 | |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1676 | if (CFP->getType()->isFloatTy()) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1677 | if (AP.isVerbose()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1678 | float Val = CFP->getValueAPF().convertToFloat(); |
| 1679 | AP.OutStreamer.GetCommentOS() << "float " << Val << '\n'; |
Dan Gohman | a12e9d7 | 2009-08-12 18:32:22 +0000 | [diff] [blame] | 1680 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1681 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1682 | AP.OutStreamer.EmitIntValue(Val, 4, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1683 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1684 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1685 | |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1686 | if (CFP->getType()->isX86_FP80Ty()) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1687 | // all long double variants are printed as hex |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 1688 | // API needed to prevent premature destruction |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1689 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1690 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1691 | if (AP.isVerbose()) { |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1692 | // Convert to double so we can print the approximate val as a comment. |
| 1693 | APFloat DoubleVal = CFP->getValueAPF(); |
| 1694 | bool ignored; |
| 1695 | DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 1696 | &ignored); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1697 | AP.OutStreamer.GetCommentOS() << "x86_fp80 ~= " |
| 1698 | << DoubleVal.convertToDouble() << '\n'; |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1699 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1700 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1701 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1702 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
| 1703 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1704 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1705 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1706 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1707 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1708 | |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1709 | // Emit the tail padding for the long double. |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1710 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1711 | AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) - |
| 1712 | TD.getTypeStoreSize(CFP->getType()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1713 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1714 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1715 | |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1716 | assert(CFP->getType()->isPPC_FP128Ty() && |
| 1717 | "Floating point constant type not handled"); |
Dale Johannesen | 343b42e | 2010-04-07 01:15:14 +0000 | [diff] [blame] | 1718 | // All long double variants are printed as hex |
| 1719 | // API needed to prevent premature destruction. |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1720 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1721 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1722 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1723 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1724 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1725 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1726 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
| 1727 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1728 | } |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1729 | } |
| 1730 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1731 | static void EmitGlobalConstantLargeInt(const ConstantInt *CI, |
| 1732 | unsigned AddrSpace, AsmPrinter &AP) { |
| 1733 | const TargetData *TD = AP.TM.getTargetData(); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1734 | unsigned BitWidth = CI->getBitWidth(); |
Chris Lattner | 38c2b0a | 2010-01-13 04:39:46 +0000 | [diff] [blame] | 1735 | assert((BitWidth & 63) == 0 && "only support multiples of 64-bits"); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1736 | |
| 1737 | // We don't expect assemblers to support integer data directives |
| 1738 | // for more than 64 bits, so we emit the data in at most 64-bit |
| 1739 | // quantities at a time. |
| 1740 | const uint64_t *RawData = CI->getValue().getRawData(); |
| 1741 | for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1742 | uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i]; |
| 1743 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1744 | } |
| 1745 | } |
| 1746 | |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1747 | static void EmitGlobalConstantImpl(const Constant *CV, unsigned AddrSpace, |
| 1748 | AsmPrinter &AP) { |
Chris Lattner | 043c4e5 | 2010-01-20 07:19:19 +0000 | [diff] [blame] | 1749 | if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1750 | uint64_t Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1751 | return AP.OutStreamer.EmitZeros(Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1752 | } |
| 1753 | |
| 1754 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1755 | unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1756 | switch (Size) { |
| 1757 | case 1: |
| 1758 | case 2: |
| 1759 | case 4: |
| 1760 | case 8: |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1761 | if (AP.isVerbose()) |
| 1762 | AP.OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue()); |
Bill Wendling | 3d7ff08 | 2010-08-18 18:41:13 +0000 | [diff] [blame] | 1763 | AP.OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1764 | return; |
| 1765 | default: |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1766 | EmitGlobalConstantLargeInt(CI, AddrSpace, AP); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1767 | return; |
| 1768 | } |
| 1769 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1770 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1771 | if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1772 | return EmitGlobalConstantArray(CVA, AddrSpace, AP); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1773 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1774 | if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1775 | return EmitGlobalConstantStruct(CVS, AddrSpace, AP); |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1776 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1777 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1778 | return EmitGlobalConstantFP(CFP, AddrSpace, AP); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1779 | |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1780 | if (isa<ConstantPointerNull>(CV)) { |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1781 | unsigned Size = AP.TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1782 | AP.OutStreamer.EmitIntValue(0, Size, AddrSpace); |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1783 | return; |
| 1784 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1785 | |
Chris Lattner | 93b122d | 2010-03-16 21:25:55 +0000 | [diff] [blame] | 1786 | if (const ConstantVector *V = dyn_cast<ConstantVector>(CV)) |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1787 | return EmitGlobalConstantVector(V, AddrSpace, AP); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1788 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1789 | // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it |
| 1790 | // thread the streamer with EmitValue. |
Chris Lattner | 44e0508 | 2010-04-20 06:20:21 +0000 | [diff] [blame] | 1791 | AP.OutStreamer.EmitValue(LowerConstant(CV, AP), |
| 1792 | AP.TM.getTargetData()->getTypeAllocSize(CV->getType()), |
| 1793 | AddrSpace); |
| 1794 | } |
| 1795 | |
| 1796 | /// EmitGlobalConstant - Print a general LLVM constant to the .s file. |
| 1797 | void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) { |
| 1798 | uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1799 | if (Size) |
| 1800 | EmitGlobalConstantImpl(CV, AddrSpace, *this); |
| 1801 | else if (MAI->hasSubsectionsViaSymbols()) { |
| 1802 | // If the global has zero size, emit a single byte so that two labels don't |
| 1803 | // look like they are at the same location. |
| 1804 | OutStreamer.EmitIntValue(0, 1, AddrSpace); |
| 1805 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1806 | } |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1807 | |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 1808 | void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) { |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1809 | // Target doesn't support this yet! |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1810 | llvm_unreachable("Target does not support EmitMachineConstantPoolValue"); |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1811 | } |
| 1812 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1813 | void AsmPrinter::printOffset(int64_t Offset, raw_ostream &OS) const { |
| 1814 | if (Offset > 0) |
| 1815 | OS << '+' << Offset; |
| 1816 | else if (Offset < 0) |
| 1817 | OS << Offset; |
| 1818 | } |
| 1819 | |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1820 | //===----------------------------------------------------------------------===// |
| 1821 | // Symbol Lowering Routines. |
| 1822 | //===----------------------------------------------------------------------===// |
| 1823 | |
| 1824 | /// GetTempSymbol - Return the MCSymbol corresponding to the assembler |
| 1825 | /// temporary label with the specified stem and unique ID. |
| 1826 | MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name, unsigned ID) const { |
Chris Lattner | af8df26 | 2010-04-04 19:28:59 +0000 | [diff] [blame] | 1827 | return OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + |
Chris Lattner | c021572 | 2010-04-04 19:25:43 +0000 | [diff] [blame] | 1828 | Name + Twine(ID)); |
| 1829 | } |
| 1830 | |
| 1831 | /// GetTempSymbol - Return an assembler temporary label with the specified |
| 1832 | /// stem. |
| 1833 | MCSymbol *AsmPrinter::GetTempSymbol(StringRef Name) const { |
| 1834 | return OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix())+ |
| 1835 | Name); |
| 1836 | } |
| 1837 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1838 | |
Chris Lattner | 9517554 | 2010-02-08 23:10:08 +0000 | [diff] [blame] | 1839 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const { |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1840 | return MMI->getAddrLabelSymbol(BA->getBasicBlock()); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1841 | } |
| 1842 | |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1843 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const { |
| 1844 | return MMI->getAddrLabelSymbol(BB); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1845 | } |
| 1846 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1847 | /// GetCPISymbol - Return the symbol for the specified constant pool entry. |
| 1848 | MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1849 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1850 | (Twine(MAI->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber()) |
| 1851 | + "_" + Twine(CPID)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1852 | } |
| 1853 | |
| 1854 | /// GetJTISymbol - Return the symbol for the specified jump table entry. |
Bill Wendling | 07d3177 | 2010-06-29 22:34:52 +0000 | [diff] [blame] | 1855 | MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const { |
| 1856 | return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate); |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1857 | } |
| 1858 | |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1859 | /// GetJTSetSymbol - Return the symbol for the specified jump table .set |
| 1860 | /// FIXME: privatize to AsmPrinter. |
| 1861 | MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1862 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1863 | (Twine(MAI->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" + |
| 1864 | Twine(UID) + "_set_" + Twine(MBBID)); |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1865 | } |
| 1866 | |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1867 | /// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1868 | /// 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] | 1869 | /// symbol is forced to have private linkage if ForcePrivate is true. |
| 1870 | MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV, |
| 1871 | StringRef Suffix, |
| 1872 | bool ForcePrivate) const { |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1873 | SmallString<60> NameStr; |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1874 | Mang->getNameWithPrefix(NameStr, GV, ForcePrivate); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1875 | NameStr.append(Suffix.begin(), Suffix.end()); |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1876 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1877 | } |
| 1878 | |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1879 | /// GetExternalSymbolSymbol - Return the MCSymbol for the specified |
| 1880 | /// ExternalSymbol. |
| 1881 | MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const { |
| 1882 | SmallString<60> NameStr; |
| 1883 | Mang->getNameWithPrefix(NameStr, Sym); |
| 1884 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1885 | } |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1886 | |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1887 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1888 | |
| 1889 | /// PrintParentLoopComment - Print comments about parent loops of this one. |
| 1890 | static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1891 | unsigned FunctionNumber) { |
| 1892 | if (Loop == 0) return; |
| 1893 | PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber); |
| 1894 | OS.indent(Loop->getLoopDepth()*2) |
| 1895 | << "Parent Loop BB" << FunctionNumber << "_" |
| 1896 | << Loop->getHeader()->getNumber() |
| 1897 | << " Depth=" << Loop->getLoopDepth() << '\n'; |
| 1898 | } |
| 1899 | |
| 1900 | |
| 1901 | /// PrintChildLoopComment - Print comments about child loops within |
| 1902 | /// the loop for this basic block, with nesting. |
| 1903 | static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1904 | unsigned FunctionNumber) { |
| 1905 | // Add child loop information |
| 1906 | for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){ |
| 1907 | OS.indent((*CL)->getLoopDepth()*2) |
| 1908 | << "Child Loop BB" << FunctionNumber << "_" |
| 1909 | << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth() |
| 1910 | << '\n'; |
| 1911 | PrintChildLoopComment(OS, *CL, FunctionNumber); |
| 1912 | } |
| 1913 | } |
| 1914 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1915 | /// EmitBasicBlockLoopComments - Pretty-print comments for basic blocks. |
| 1916 | static void EmitBasicBlockLoopComments(const MachineBasicBlock &MBB, |
| 1917 | const MachineLoopInfo *LI, |
| 1918 | const AsmPrinter &AP) { |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1919 | // Add loop depth information |
| 1920 | const MachineLoop *Loop = LI->getLoopFor(&MBB); |
| 1921 | if (Loop == 0) return; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1922 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1923 | MachineBasicBlock *Header = Loop->getHeader(); |
| 1924 | assert(Header && "No header for loop"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1925 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1926 | // If this block is not a loop header, just print out what is the loop header |
| 1927 | // and return. |
| 1928 | if (Header != &MBB) { |
| 1929 | AP.OutStreamer.AddComment(" in Loop: Header=BB" + |
| 1930 | Twine(AP.getFunctionNumber())+"_" + |
| 1931 | Twine(Loop->getHeader()->getNumber())+ |
| 1932 | " Depth="+Twine(Loop->getLoopDepth())); |
| 1933 | return; |
| 1934 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1935 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1936 | // Otherwise, it is a loop header. Print out information about child and |
| 1937 | // parent loops. |
| 1938 | raw_ostream &OS = AP.OutStreamer.GetCommentOS(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1939 | |
| 1940 | PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber()); |
| 1941 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1942 | OS << "=>"; |
| 1943 | OS.indent(Loop->getLoopDepth()*2-2); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1944 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1945 | OS << "This "; |
| 1946 | if (Loop->empty()) |
| 1947 | OS << "Inner "; |
| 1948 | OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n'; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1949 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1950 | PrintChildLoopComment(OS, Loop, AP.getFunctionNumber()); |
| 1951 | } |
| 1952 | |
| 1953 | |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1954 | /// EmitBasicBlockStart - This method prints the label for the specified |
| 1955 | /// MachineBasicBlock, an alignment (if present) and a comment describing |
| 1956 | /// it if appropriate. |
Chris Lattner | 662316c | 2009-09-14 03:15:54 +0000 | [diff] [blame] | 1957 | void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const { |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1958 | // Emit an alignment directive for this block, if needed. |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1959 | if (unsigned Align = MBB->getAlignment()) |
| 1960 | EmitAlignment(Log2_32(Align)); |
Evan Cheng | fb8075d | 2008-02-28 00:43:03 +0000 | [diff] [blame] | 1961 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1962 | // If the block has its address taken, emit any labels that were used to |
| 1963 | // reference the block. It is possible that there is more than one label |
| 1964 | // here, because multiple LLVM BB's may have been RAUW'd to this block after |
| 1965 | // the references were generated. |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1966 | if (MBB->hasAddressTaken()) { |
Chris Lattner | 213168b | 2010-01-20 07:24:05 +0000 | [diff] [blame] | 1967 | const BasicBlock *BB = MBB->getBasicBlock(); |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1968 | if (isVerbose()) |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1969 | OutStreamer.AddComment("Block address taken"); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1970 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1971 | std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB); |
| 1972 | |
| 1973 | for (unsigned i = 0, e = Syms.size(); i != e; ++i) |
| 1974 | OutStreamer.EmitLabel(Syms[i]); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1975 | } |
| 1976 | |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1977 | // Print the main label for the block. |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1978 | if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1979 | if (isVerbose() && OutStreamer.hasRawTextSupport()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1980 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1981 | if (BB->hasName()) |
| 1982 | OutStreamer.AddComment("%" + BB->getName()); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1983 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1984 | EmitBasicBlockLoopComments(*MBB, LI, *this); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 1985 | |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1986 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
| 1987 | OutStreamer.EmitRawText(Twine(MAI->getCommentString()) + " BB#" + |
| 1988 | Twine(MBB->getNumber()) + ":"); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1989 | } |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1990 | } else { |
Chris Lattner | 3f53c83 | 2010-04-04 18:52:31 +0000 | [diff] [blame] | 1991 | if (isVerbose()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1992 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1993 | if (BB->hasName()) |
| 1994 | OutStreamer.AddComment("%" + BB->getName()); |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1995 | EmitBasicBlockLoopComments(*MBB, LI, *this); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1996 | } |
Chris Lattner | d8d0aee | 2010-01-22 21:00:45 +0000 | [diff] [blame] | 1997 | |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1998 | OutStreamer.EmitLabel(MBB->getSymbol()); |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1999 | } |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 2000 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 2001 | |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 2002 | void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility, |
| 2003 | bool IsDefinition) const { |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2004 | MCSymbolAttr Attr = MCSA_Invalid; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2005 | |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2006 | switch (Visibility) { |
| 2007 | default: break; |
| 2008 | case GlobalValue::HiddenVisibility: |
Stuart Hastings | 5129bde | 2011-02-23 02:27:05 +0000 | [diff] [blame] | 2009 | if (IsDefinition) |
| 2010 | Attr = MAI->getHiddenVisibilityAttr(); |
| 2011 | else |
| 2012 | Attr = MAI->getHiddenDeclarationVisibilityAttr(); |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2013 | break; |
| 2014 | case GlobalValue::ProtectedVisibility: |
| 2015 | Attr = MAI->getProtectedVisibilityAttr(); |
| 2016 | break; |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 2017 | } |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 2018 | |
| 2019 | if (Attr != MCSA_Invalid) |
| 2020 | OutStreamer.EmitSymbolAttribute(Sym, Attr); |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 2021 | } |
| 2022 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2023 | /// isBlockOnlyReachableByFallthough - Return true if the basic block has |
| 2024 | /// exactly one predecessor and the control transfer mechanism between |
| 2025 | /// the predecessor and this block is a fall-through. |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 2026 | bool AsmPrinter:: |
| 2027 | isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const { |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2028 | // If this is a landing pad, it isn't a fall through. If it has no preds, |
| 2029 | // then nothing falls through to it. |
| 2030 | if (MBB->isLandingPad() || MBB->pred_empty()) |
| 2031 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2032 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2033 | // If there isn't exactly one predecessor, it can't be a fall through. |
| 2034 | MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI; |
| 2035 | ++PI2; |
| 2036 | if (PI2 != MBB->pred_end()) |
| 2037 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2038 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2039 | // The predecessor has to be immediately before this block. |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2040 | MachineBasicBlock *Pred = *PI; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2041 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2042 | if (!Pred->isLayoutSuccessor(MBB)) |
| 2043 | return false; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2044 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2045 | // If the block is completely empty, then it definitely does fall through. |
| 2046 | if (Pred->empty()) |
| 2047 | return true; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2048 | |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2049 | // Check the terminators in the previous blocks |
| 2050 | for (MachineBasicBlock::iterator II = Pred->getFirstTerminator(), |
| 2051 | IE = Pred->end(); II != IE; ++II) { |
| 2052 | MachineInstr &MI = *II; |
| 2053 | |
| 2054 | // If it is not a simple branch, we are in a table somewhere. |
| 2055 | if (!MI.getDesc().isBranch() || MI.getDesc().isIndirectBranch()) |
| 2056 | return false; |
| 2057 | |
| 2058 | // If we are the operands of one of the branches, this is not |
| 2059 | // a fall through. |
| 2060 | for (MachineInstr::mop_iterator OI = MI.operands_begin(), |
| 2061 | OE = MI.operands_end(); OI != OE; ++OI) { |
| 2062 | const MachineOperand& OP = *OI; |
Rafael Espindola | aeb6da4 | 2011-06-15 21:00:28 +0000 | [diff] [blame] | 2063 | if (OP.isJTI()) |
| 2064 | return false; |
Eli Friedman | 0fc3015 | 2011-06-14 19:30:33 +0000 | [diff] [blame] | 2065 | if (OP.isMBB() && OP.getMBB() == MBB) |
| 2066 | return false; |
| 2067 | } |
| 2068 | } |
| 2069 | |
| 2070 | return true; |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 2071 | } |
| 2072 | |
| 2073 | |
| 2074 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2075 | GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) { |
| 2076 | if (!S->usesMetadata()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2077 | return 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 2078 | |
| 2079 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
| 2080 | gcp_map_type::iterator GCPI = GCMap.find(S); |
| 2081 | if (GCPI != GCMap.end()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2082 | return GCPI->second; |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2083 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2084 | const char *Name = S->getName().c_str(); |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2085 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2086 | for (GCMetadataPrinterRegistry::iterator |
| 2087 | I = GCMetadataPrinterRegistry::begin(), |
| 2088 | E = GCMetadataPrinterRegistry::end(); I != E; ++I) |
| 2089 | if (strcmp(Name, I->getName()) == 0) { |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2090 | GCMetadataPrinter *GMP = I->instantiate(); |
| 2091 | GMP->S = S; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 2092 | GCMap.insert(std::make_pair(S, GMP)); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 2093 | return GMP; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2094 | } |
Jim Grosbach | 83d8083 | 2011-03-29 23:20:22 +0000 | [diff] [blame] | 2095 | |
Chris Lattner | 75361b6 | 2010-04-07 22:58:41 +0000 | [diff] [blame] | 2096 | report_fatal_error("no GCMetadataPrinter registered for GC: " + Twine(Name)); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 2097 | return 0; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 2098 | } |