Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 1 | //===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===// |
| 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" |
Evan Cheng | 246ae0d | 2006-03-01 22:18:09 +0000 | [diff] [blame] | 16 | #include "llvm/Assembly/Writer.h" |
Nate Begeman | 8cfa57b | 2005-12-06 06:18:55 +0000 | [diff] [blame] | 17 | #include "llvm/DerivedTypes.h" |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 18 | #include "llvm/Constants.h" |
Chris Lattner | 450de39 | 2005-11-10 18:36:17 +0000 | [diff] [blame] | 19 | #include "llvm/Module.h" |
Chris Lattner | 45111d1 | 2010-01-16 21:57:06 +0000 | [diff] [blame] | 20 | #include "llvm/CodeGen/DwarfWriter.h" |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 21 | #include "llvm/CodeGen/GCMetadataPrinter.h" |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 22 | #include "llvm/CodeGen/MachineConstantPool.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 23 | #include "llvm/CodeGen/MachineFrameInfo.h" |
David Greene | fe37ab3 | 2009-08-18 19:22:55 +0000 | [diff] [blame] | 24 | #include "llvm/CodeGen/MachineFunction.h" |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 25 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 26 | #include "llvm/CodeGen/MachineLoopInfo.h" |
Chris Lattner | 84bc542 | 2007-12-31 04:13:23 +0000 | [diff] [blame] | 27 | #include "llvm/CodeGen/MachineModuleInfo.h" |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 28 | #include "llvm/Analysis/ConstantFolding.h" |
Argyrios Kyrtzidis | cd76240 | 2009-05-07 13:55:51 +0000 | [diff] [blame] | 29 | #include "llvm/Analysis/DebugInfo.h" |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 30 | #include "llvm/MC/MCContext.h" |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 31 | #include "llvm/MC/MCExpr.h" |
David Greene | 3ac1ab8 | 2009-07-16 22:24:20 +0000 | [diff] [blame] | 32 | #include "llvm/MC/MCInst.h" |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 33 | #include "llvm/MC/MCSection.h" |
| 34 | #include "llvm/MC/MCStreamer.h" |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 35 | #include "llvm/MC/MCSymbol.h" |
Chris Lattner | af76e59 | 2009-08-22 20:48:53 +0000 | [diff] [blame] | 36 | #include "llvm/MC/MCAsmInfo.h" |
Chris Lattner | 45111d1 | 2010-01-16 21:57:06 +0000 | [diff] [blame] | 37 | #include "llvm/Target/Mangler.h" |
Owen Anderson | 07000c6 | 2006-05-12 06:33:49 +0000 | [diff] [blame] | 38 | #include "llvm/Target/TargetData.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 39 | #include "llvm/Target/TargetInstrInfo.h" |
Chris Lattner | 0336fdb | 2006-10-06 22:50:56 +0000 | [diff] [blame] | 40 | #include "llvm/Target/TargetLowering.h" |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 41 | #include "llvm/Target/TargetLoweringObjectFile.h" |
Evan Cheng | 6547e40 | 2008-07-01 23:18:29 +0000 | [diff] [blame] | 42 | #include "llvm/Target/TargetOptions.h" |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 43 | #include "llvm/Target/TargetRegisterInfo.h" |
Evan Cheng | cc41586 | 2007-11-09 01:32:10 +0000 | [diff] [blame] | 44 | #include "llvm/ADT/SmallPtrSet.h" |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 45 | #include "llvm/ADT/SmallString.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 46 | #include "llvm/ADT/Statistic.h" |
| 47 | #include "llvm/Support/CommandLine.h" |
| 48 | #include "llvm/Support/Debug.h" |
| 49 | #include "llvm/Support/ErrorHandling.h" |
| 50 | #include "llvm/Support/Format.h" |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 51 | #include <cerrno> |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 52 | using namespace llvm; |
| 53 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 54 | STATISTIC(EmittedInsts, "Number of machine instrs printed"); |
| 55 | |
Devang Patel | 1997473 | 2007-05-03 01:11:54 +0000 | [diff] [blame] | 56 | char AsmPrinter::ID = 0; |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 57 | |
Chris Lattner | b23569a | 2010-04-04 08:18:47 +0000 | [diff] [blame^] | 58 | AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer) |
| 59 | : MachineFunctionPass(&ID), |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 60 | TM(tm), MAI(tm.getMCAsmInfo()), TRI(tm.getRegisterInfo()), |
| 61 | OutContext(Streamer.getContext()), |
| 62 | OutStreamer(Streamer), |
Devang Patel | 553881b | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 63 | LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) { |
Chris Lattner | 0de1fc4 | 2009-06-24 19:09:55 +0000 | [diff] [blame] | 64 | DW = 0; MMI = 0; |
Chris Lattner | 56591ab | 2010-02-02 23:37:42 +0000 | [diff] [blame] | 65 | VerboseAsm = Streamer.isVerboseAsm(); |
Evan Cheng | 42bf74b | 2009-03-25 01:47:28 +0000 | [diff] [blame] | 66 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 67 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 68 | AsmPrinter::~AsmPrinter() { |
| 69 | for (gcp_iterator I = GCMetadataPrinters.begin(), |
| 70 | E = GCMetadataPrinters.end(); I != E; ++I) |
| 71 | delete I->second; |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 72 | |
| 73 | delete &OutStreamer; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 74 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 75 | |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 76 | /// getFunctionNumber - Return a unique ID for the current function. |
| 77 | /// |
| 78 | unsigned AsmPrinter::getFunctionNumber() const { |
| 79 | return MF->getFunctionNumber(); |
| 80 | } |
| 81 | |
Chris Lattner | 38c3988 | 2009-08-03 19:12:26 +0000 | [diff] [blame] | 82 | TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const { |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 83 | return TM.getTargetLowering()->getObjFileLowering(); |
| 84 | } |
| 85 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 86 | /// getCurrentSection() - Return the current section we are emitting to. |
| 87 | const MCSection *AsmPrinter::getCurrentSection() const { |
| 88 | return OutStreamer.getCurrentSection(); |
| 89 | } |
| 90 | |
| 91 | |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 92 | void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const { |
Dan Gohman | 845012e | 2009-07-31 23:37:33 +0000 | [diff] [blame] | 93 | AU.setPreservesAll(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 94 | MachineFunctionPass::getAnalysisUsage(AU); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 95 | AU.addRequired<MachineModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 96 | AU.addRequired<GCModuleInfo>(); |
David Greene | fe37ab3 | 2009-08-18 19:22:55 +0000 | [diff] [blame] | 97 | if (VerboseAsm) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 98 | AU.addRequired<MachineLoopInfo>(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 99 | } |
| 100 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 101 | bool AsmPrinter::doInitialization(Module &M) { |
Chris Lattner | d32c8a5 | 2010-04-04 05:09:10 +0000 | [diff] [blame] | 102 | MMI = getAnalysisIfAvailable<MachineModuleInfo>(); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 103 | MMI->AnalyzeModule(M); |
| 104 | |
Chris Lattner | f26e03b | 2009-07-31 17:42:42 +0000 | [diff] [blame] | 105 | // Initialize TargetLoweringObjectFile. |
| 106 | const_cast<TargetLoweringObjectFile&>(getObjFileLowering()) |
| 107 | .Initialize(OutContext, TM); |
| 108 | |
Chris Lattner | b87c305 | 2010-03-12 20:47:28 +0000 | [diff] [blame] | 109 | Mang = new Mangler(OutContext, *TM.getTargetData()); |
Chris Lattner | 2c1b159 | 2006-01-23 23:47:53 +0000 | [diff] [blame] | 110 | |
Bob Wilson | 812209a | 2009-09-30 22:06:26 +0000 | [diff] [blame] | 111 | // Allow the target to emit any magic that it wants at the start of the file. |
| 112 | EmitStartOfAsmFile(M); |
Rafael Espindola | 952b839 | 2008-12-03 11:01:37 +0000 | [diff] [blame] | 113 | |
Chris Lattner | a6594fc | 2010-01-25 18:58:59 +0000 | [diff] [blame] | 114 | // Very minimal debug info. It is ignored if we emit actual debug info. If we |
| 115 | // 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] | 116 | if (MAI->hasSingleParameterDotFile()) { |
Chris Lattner | a6594fc | 2010-01-25 18:58:59 +0000 | [diff] [blame] | 117 | // .file "foo.c" |
| 118 | OutStreamer.EmitFileDirective(M.getModuleIdentifier()); |
Rafael Espindola | 952b839 | 2008-12-03 11:01:37 +0000 | [diff] [blame] | 119 | } |
| 120 | |
Bob Wilson | 812209a | 2009-09-30 22:06:26 +0000 | [diff] [blame] | 121 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
| 122 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 123 | for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I) |
| 124 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 125 | MP->beginAssembly(*this); |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 126 | |
| 127 | // Emit module-level inline asm if it exists. |
Chris Lattner | 47b7e5d | 2010-04-03 21:13:18 +0000 | [diff] [blame] | 128 | if (!M.getModuleInlineAsm().empty()) { |
| 129 | OutStreamer.AddComment("Start of file scope inline assembly"); |
| 130 | OutStreamer.AddBlankLine(); |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 131 | EmitInlineAsm(M.getModuleInlineAsm()); |
Chris Lattner | 47b7e5d | 2010-04-03 21:13:18 +0000 | [diff] [blame] | 132 | OutStreamer.AddComment("End of file scope inline assembly"); |
| 133 | OutStreamer.AddBlankLine(); |
| 134 | } |
Chris Lattner | 2c1b159 | 2006-01-23 23:47:53 +0000 | [diff] [blame] | 135 | |
Chris Lattner | b55e068 | 2009-09-24 05:44:53 +0000 | [diff] [blame] | 136 | DW = getAnalysisIfAvailable<DwarfWriter>(); |
Sanjiv Gupta | 9a501cf | 2009-11-14 07:22:25 +0000 | [diff] [blame] | 137 | if (DW) |
Chris Lattner | 75f5072 | 2010-04-04 07:48:20 +0000 | [diff] [blame] | 138 | DW->BeginModule(&M, this); |
Devang Patel | 14a55d9 | 2009-06-19 21:54:26 +0000 | [diff] [blame] | 139 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 140 | return false; |
| 141 | } |
| 142 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 143 | void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 144 | switch ((GlobalValue::LinkageTypes)Linkage) { |
| 145 | case GlobalValue::CommonLinkage: |
| 146 | case GlobalValue::LinkOnceAnyLinkage: |
| 147 | case GlobalValue::LinkOnceODRLinkage: |
| 148 | case GlobalValue::WeakAnyLinkage: |
| 149 | case GlobalValue::WeakODRLinkage: |
| 150 | case GlobalValue::LinkerPrivateLinkage: |
| 151 | if (MAI->getWeakDefDirective() != 0) { |
| 152 | // .globl _foo |
| 153 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 154 | // .weak_definition _foo |
| 155 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition); |
| 156 | } else if (const char *LinkOnce = MAI->getLinkOnceDirective()) { |
| 157 | // .globl _foo |
| 158 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 159 | // FIXME: linkonce should be a section attribute, handled by COFF Section |
| 160 | // assignment. |
| 161 | // http://sourceware.org/binutils/docs-2.20/as/Linkonce.html#Linkonce |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 162 | // .linkonce discard |
| 163 | // FIXME: It would be nice to use .linkonce samesize for non-common |
| 164 | // globals. |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 165 | OutStreamer.EmitRawText(StringRef(LinkOnce)); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 166 | } else { |
| 167 | // .weak _foo |
| 168 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak); |
| 169 | } |
| 170 | break; |
| 171 | case GlobalValue::DLLExportLinkage: |
| 172 | case GlobalValue::AppendingLinkage: |
| 173 | // FIXME: appending linkage variables should go into a section of |
| 174 | // their name or something. For now, just emit them as external. |
| 175 | case GlobalValue::ExternalLinkage: |
| 176 | // If external or appending, declare as a global symbol. |
| 177 | // .globl _foo |
| 178 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 179 | break; |
| 180 | case GlobalValue::PrivateLinkage: |
| 181 | case GlobalValue::InternalLinkage: |
| 182 | break; |
| 183 | default: |
| 184 | llvm_unreachable("Unknown linkage type!"); |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 189 | /// EmitGlobalVariable - Emit the specified global variable to the .s file. |
| 190 | void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { |
| 191 | if (!GV->hasInitializer()) // External globals require no code. |
| 192 | return; |
| 193 | |
| 194 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 195 | if (EmitSpecialLLVMGlobal(GV)) |
| 196 | return; |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 197 | |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 198 | MCSymbol *GVSym = Mang->getSymbol(GV); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 199 | EmitVisibility(GVSym, GV->getVisibility()); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 200 | |
Chris Lattner | a800f7c | 2010-01-25 18:33:40 +0000 | [diff] [blame] | 201 | if (MAI->hasDotTypeDotSizeDirective()) |
| 202 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 203 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 204 | SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); |
| 205 | |
| 206 | const TargetData *TD = TM.getTargetData(); |
| 207 | unsigned Size = TD->getTypeAllocSize(GV->getType()->getElementType()); |
| 208 | unsigned AlignLog = TD->getPreferredAlignmentLog(GV); |
| 209 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 210 | // Handle common and BSS local symbols (.lcomm). |
| 211 | if (GVKind.isCommon() || GVKind.isBSSLocal()) { |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 212 | if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
| 213 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 214 | if (VerboseAsm) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 215 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 216 | /*PrintType=*/false, GV->getParent()); |
| 217 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 218 | } |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 219 | |
| 220 | // Handle common symbols. |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 221 | if (GVKind.isCommon()) { |
| 222 | // .comm _foo, 42, 4 |
Chris Lattner | 4ed5438 | 2010-01-19 06:01:04 +0000 | [diff] [blame] | 223 | OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 224 | return; |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 225 | } |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 226 | |
| 227 | // Handle local BSS symbols. |
| 228 | if (MAI->hasMachoZeroFillDirective()) { |
| 229 | const MCSection *TheSection = |
| 230 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 231 | // .zerofill __DATA, __bss, _foo, 400, 5 |
| 232 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 233 | return; |
| 234 | } |
| 235 | |
Chris Lattner | 9eb158d | 2010-01-23 07:47:02 +0000 | [diff] [blame] | 236 | if (MAI->hasLCOMMDirective()) { |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 237 | // .lcomm _foo, 42 |
Chris Lattner | 9eb158d | 2010-01-23 07:47:02 +0000 | [diff] [blame] | 238 | OutStreamer.EmitLocalCommonSymbol(GVSym, Size); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 239 | return; |
| 240 | } |
| 241 | |
| 242 | // .local _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 243 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 244 | // .comm _foo, 42, 4 |
| 245 | OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 246 | return; |
| 247 | } |
| 248 | |
| 249 | const MCSection *TheSection = |
| 250 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 251 | |
| 252 | // Handle the zerofill directive on darwin, which is a special form of BSS |
| 253 | // emission. |
| 254 | if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) { |
| 255 | // .globl _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 256 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 257 | // .zerofill __DATA, __common, _foo, 400, 5 |
| 258 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 259 | return; |
| 260 | } |
| 261 | |
| 262 | OutStreamer.SwitchSection(TheSection); |
| 263 | |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 264 | EmitLinkage(GV->getLinkage(), GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 265 | EmitAlignment(AlignLog, GV); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 266 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 267 | if (VerboseAsm) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 268 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 269 | /*PrintType=*/false, GV->getParent()); |
| 270 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 271 | } |
Chris Lattner | 4c8c668 | 2010-01-19 06:41:24 +0000 | [diff] [blame] | 272 | OutStreamer.EmitLabel(GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 273 | |
| 274 | EmitGlobalConstant(GV->getInitializer()); |
| 275 | |
| 276 | if (MAI->hasDotTypeDotSizeDirective()) |
Chris Lattner | 1947f24 | 2010-01-25 07:53:05 +0000 | [diff] [blame] | 277 | // .size foo, 42 |
Chris Lattner | 99328ad | 2010-01-25 07:52:13 +0000 | [diff] [blame] | 278 | OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext)); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 279 | |
| 280 | OutStreamer.AddBlankLine(); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 281 | } |
| 282 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 283 | /// EmitFunctionHeader - This method emits the header for the current |
| 284 | /// function. |
| 285 | void AsmPrinter::EmitFunctionHeader() { |
| 286 | // Print out constants referenced by the function |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 287 | EmitConstantPool(); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 288 | |
| 289 | // Print the 'header' of function. |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 290 | const Function *F = MF->getFunction(); |
| 291 | |
| 292 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM)); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 293 | EmitVisibility(CurrentFnSym, F->getVisibility()); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 294 | |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 295 | EmitLinkage(F->getLinkage(), CurrentFnSym); |
Chris Lattner | b406a81 | 2010-01-26 23:41:48 +0000 | [diff] [blame] | 296 | EmitAlignment(MF->getAlignment(), F); |
| 297 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 298 | if (MAI->hasDotTypeDotSizeDirective()) |
| 299 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction); |
| 300 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 301 | if (VerboseAsm) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 302 | WriteAsOperand(OutStreamer.GetCommentOS(), F, |
| 303 | /*PrintType=*/false, F->getParent()); |
| 304 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 305 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 306 | |
Dan Gohman | f451cb8 | 2010-02-10 16:03:48 +0000 | [diff] [blame] | 307 | // Emit the CurrentFnSym. This is a virtual function to allow targets to |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 308 | // do their wild and crazy things as required. |
| 309 | EmitFunctionEntryLabel(); |
| 310 | |
Chris Lattner | 9cc0da9 | 2010-03-15 20:39:00 +0000 | [diff] [blame] | 311 | // If the function had address-taken blocks that got deleted, then we have |
| 312 | // references to the dangling symbols. Emit them at the start of the function |
| 313 | // so that we don't get references to undefined symbols. |
| 314 | std::vector<MCSymbol*> DeadBlockSyms; |
| 315 | MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms); |
| 316 | for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) { |
| 317 | OutStreamer.AddComment("Address taken block that was later removed"); |
| 318 | OutStreamer.EmitLabel(DeadBlockSyms[i]); |
| 319 | } |
| 320 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 321 | // Add some workaround for linkonce linkage on Cygwin\MinGW. |
| 322 | if (MAI->getLinkOnceDirective() != 0 && |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 323 | (F->hasLinkOnceLinkage() || F->hasWeakLinkage())) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 324 | // FIXME: What is this? |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 325 | MCSymbol *FakeStub = |
| 326 | OutContext.GetOrCreateSymbol(Twine("Lllvm$workaround$fake$stub$")+ |
| 327 | CurrentFnSym->getName()); |
| 328 | OutStreamer.EmitLabel(FakeStub); |
| 329 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 330 | |
| 331 | // Emit pre-function debug and/or EH information. |
| 332 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
| 333 | DW->BeginFunction(MF); |
| 334 | } |
| 335 | |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 336 | /// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the |
| 337 | /// function. This can be overridden by targets as required to do custom stuff. |
| 338 | void AsmPrinter::EmitFunctionEntryLabel() { |
| 339 | OutStreamer.EmitLabel(CurrentFnSym); |
| 340 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 341 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 342 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 343 | /// EmitComments - Pretty-print comments for instructions. |
| 344 | static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) { |
| 345 | const MachineFunction *MF = MI.getParent()->getParent(); |
| 346 | const TargetMachine &TM = MF->getTarget(); |
| 347 | |
Chris Lattner | de4845c | 2010-04-02 19:42:39 +0000 | [diff] [blame] | 348 | DebugLoc DL = MI.getDebugLoc(); |
| 349 | if (!DL.isUnknown()) { // Print source line info. |
| 350 | DIScope Scope(DL.getScope(MF->getFunction()->getContext())); |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 351 | // Omit the directory, because it's likely to be long and uninteresting. |
Devang Patel | 3c91b05 | 2010-03-08 20:52:55 +0000 | [diff] [blame] | 352 | if (Scope.Verify()) |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 353 | CommentOS << Scope.getFilename(); |
| 354 | else |
| 355 | CommentOS << "<unknown>"; |
Chris Lattner | de4845c | 2010-04-02 19:42:39 +0000 | [diff] [blame] | 356 | CommentOS << ':' << DL.getLine(); |
| 357 | if (DL.getCol() != 0) |
| 358 | CommentOS << ':' << DL.getCol(); |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 359 | CommentOS << '\n'; |
| 360 | } |
| 361 | |
| 362 | // Check for spills and reloads |
| 363 | int FI; |
| 364 | |
| 365 | const MachineFrameInfo *FrameInfo = MF->getFrameInfo(); |
| 366 | |
| 367 | // We assume a single instruction only has a spill or reload, not |
| 368 | // both. |
| 369 | const MachineMemOperand *MMO; |
| 370 | if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) { |
| 371 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 372 | MMO = *MI.memoperands_begin(); |
| 373 | CommentOS << MMO->getSize() << "-byte Reload\n"; |
| 374 | } |
| 375 | } else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) { |
| 376 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 377 | CommentOS << MMO->getSize() << "-byte Folded Reload\n"; |
| 378 | } else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) { |
| 379 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 380 | MMO = *MI.memoperands_begin(); |
| 381 | CommentOS << MMO->getSize() << "-byte Spill\n"; |
| 382 | } |
| 383 | } else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) { |
| 384 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 385 | CommentOS << MMO->getSize() << "-byte Folded Spill\n"; |
| 386 | } |
| 387 | |
| 388 | // Check for spill-induced copies |
| 389 | unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx; |
| 390 | if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg, |
| 391 | SrcSubIdx, DstSubIdx)) { |
Chris Lattner | 45282ae | 2010-02-10 01:23:18 +0000 | [diff] [blame] | 392 | if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse)) |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 393 | CommentOS << " Reload Reuse\n"; |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | |
| 398 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 399 | /// EmitFunctionBody - This method emits the body and trailer for a |
| 400 | /// function. |
| 401 | void AsmPrinter::EmitFunctionBody() { |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 402 | // Emit target-specific gunk before the function body. |
| 403 | EmitFunctionBodyStart(); |
| 404 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 405 | // Print out code for the function. |
| 406 | bool HasAnyRealCode = false; |
| 407 | for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); |
| 408 | I != E; ++I) { |
| 409 | // Print a label for the basic block. |
| 410 | EmitBasicBlockStart(I); |
| 411 | for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); |
| 412 | II != IE; ++II) { |
| 413 | // Print the assembly for the instruction. |
| 414 | if (!II->isLabel()) |
| 415 | HasAnyRealCode = true; |
| 416 | |
| 417 | ++EmittedInsts; |
| 418 | |
| 419 | // FIXME: Clean up processDebugLoc. |
| 420 | processDebugLoc(II, true); |
| 421 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 422 | if (VerboseAsm) |
| 423 | EmitComments(*II, OutStreamer.GetCommentOS()); |
| 424 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 425 | switch (II->getOpcode()) { |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 426 | case TargetOpcode::DBG_LABEL: |
| 427 | case TargetOpcode::EH_LABEL: |
| 428 | case TargetOpcode::GC_LABEL: |
Chris Lattner | f64159c84 | 2010-02-03 01:46:05 +0000 | [diff] [blame] | 429 | printLabelInst(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 430 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 431 | case TargetOpcode::INLINEASM: |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 432 | printInlineAsm(II); |
| 433 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 434 | case TargetOpcode::IMPLICIT_DEF: |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 435 | printImplicitDef(II); |
| 436 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 437 | case TargetOpcode::KILL: |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 438 | printKill(II); |
| 439 | break; |
| 440 | default: |
| 441 | EmitInstruction(II); |
| 442 | break; |
| 443 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 444 | |
| 445 | // FIXME: Clean up processDebugLoc. |
| 446 | processDebugLoc(II, false); |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | // 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] | 451 | // then we need to emit *something* to the function body to prevent the |
| 452 | // labels from collapsing together. Just emit a 0 byte. |
Chris Lattner | 10e7c60 | 2010-01-28 01:06:32 +0000 | [diff] [blame] | 453 | if (MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) |
| 454 | OutStreamer.EmitIntValue(0, 1, 0/*addrspace*/); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 455 | |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 456 | // Emit target-specific gunk after the function body. |
| 457 | EmitFunctionBodyEnd(); |
| 458 | |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 459 | // If the target wants a .size directive for the size of the function, emit |
| 460 | // it. |
| 461 | if (MAI->hasDotTypeDotSizeDirective()) { |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 462 | // Create a symbol for the end of function, so we can get the size as |
| 463 | // difference between the function label and the temp label. |
| 464 | MCSymbol *FnEndLabel = OutContext.CreateTempSymbol(); |
| 465 | OutStreamer.EmitLabel(FnEndLabel); |
| 466 | |
| 467 | const MCExpr *SizeExp = |
| 468 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext), |
| 469 | MCSymbolRefExpr::Create(CurrentFnSym, OutContext), |
| 470 | OutContext); |
| 471 | OutStreamer.EmitELFSize(CurrentFnSym, SizeExp); |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 472 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 473 | |
| 474 | // Emit post-function debug information. |
| 475 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
| 476 | DW->EndFunction(MF); |
| 477 | |
| 478 | // Print out jump tables referenced by the function. |
| 479 | EmitJumpTableInfo(); |
Chris Lattner | d26a80f | 2010-02-03 01:49:49 +0000 | [diff] [blame] | 480 | |
| 481 | OutStreamer.AddBlankLine(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 485 | bool AsmPrinter::doFinalization(Module &M) { |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 486 | // Emit global variables. |
| 487 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 488 | I != E; ++I) |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 489 | EmitGlobalVariable(I); |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 490 | |
Chris Lattner | 1f522fe | 2009-06-24 18:54:37 +0000 | [diff] [blame] | 491 | // Emit final debug information. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 492 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
Chris Lattner | 1f522fe | 2009-06-24 18:54:37 +0000 | [diff] [blame] | 493 | DW->EndModule(); |
| 494 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 495 | // If the target wants to know about weak references, print them all. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 496 | if (MAI->getWeakRefDirective()) { |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 497 | // FIXME: This is not lazy, it would be nice to only print weak references |
| 498 | // to stuff that is actually used. Note that doing so would require targets |
| 499 | // to notice uses in operands (due to constant exprs etc). This should |
| 500 | // happen with the MC stuff eventually. |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 501 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 502 | // Print out module-level global variables here. |
| 503 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 504 | I != E; ++I) { |
Chris Lattner | 08ce3b4 | 2010-01-16 18:17:26 +0000 | [diff] [blame] | 505 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 506 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 507 | } |
| 508 | |
Chris Lattner | c6fdced | 2009-08-03 23:10:34 +0000 | [diff] [blame] | 509 | 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] | 510 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 511 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 512 | } |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 513 | } |
| 514 | |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 515 | if (MAI->hasSetDirective()) { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 516 | OutStreamer.AddBlankLine(); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 517 | 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] | 518 | I != E; ++I) { |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 519 | MCSymbol *Name = Mang->getSymbol(I); |
Anton Korobeynikov | 325be7c | 2007-09-06 17:21:48 +0000 | [diff] [blame] | 520 | |
| 521 | const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal()); |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 522 | MCSymbol *Target = Mang->getSymbol(GV); |
Anton Korobeynikov | 541af7f | 2008-09-24 22:21:04 +0000 | [diff] [blame] | 523 | |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 524 | if (I->hasExternalLinkage() || !MAI->getWeakRefDirective()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 525 | OutStreamer.EmitSymbolAttribute(Name, MCSA_Global); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 526 | else if (I->hasWeakLinkage()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 527 | OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 528 | else |
Chris Lattner | 1059549 | 2010-01-16 01:37:14 +0000 | [diff] [blame] | 529 | assert(I->hasLocalLinkage() && "Invalid alias linkage"); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 530 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 531 | EmitVisibility(Name, I->getVisibility()); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 532 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 533 | // Emit the directives as assignments aka .set: |
| 534 | OutStreamer.EmitAssignment(Name, |
| 535 | MCSymbolRefExpr::Create(Target, OutContext)); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 536 | } |
| 537 | } |
| 538 | |
Duncan Sands | 1465d61 | 2009-01-28 13:14:17 +0000 | [diff] [blame] | 539 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 540 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
| 541 | for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; ) |
| 542 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 543 | MP->finishAssembly(*this); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 544 | |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 545 | // If we don't have any trampolines, then we don't require stack memory |
| 546 | // to be executable. Some targets have a directive to declare this. |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 547 | Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline"); |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 548 | if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty()) |
Chris Lattner | f9f93e4 | 2010-01-23 07:21:06 +0000 | [diff] [blame] | 549 | if (MCSection *S = MAI->getNonexecutableStackSection(OutContext)) |
| 550 | OutStreamer.SwitchSection(S); |
Chris Lattner | bd23d5f | 2009-09-18 20:17:03 +0000 | [diff] [blame] | 551 | |
| 552 | // Allow the target to emit any magic that it wants at the end of the file, |
| 553 | // after everything else has gone out. |
| 554 | EmitEndOfAsmFile(M); |
| 555 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 556 | delete Mang; Mang = 0; |
Chris Lattner | 0de1fc4 | 2009-06-24 19:09:55 +0000 | [diff] [blame] | 557 | DW = 0; MMI = 0; |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 558 | |
| 559 | OutStreamer.Finish(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 560 | return false; |
| 561 | } |
| 562 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 563 | void AsmPrinter::SetupMachineFunction(MachineFunction &MF) { |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 564 | this->MF = &MF; |
Chris Lattner | 412c3a5 | 2010-01-16 01:24:10 +0000 | [diff] [blame] | 565 | // Get the function symbol. |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 566 | CurrentFnSym = Mang->getSymbol(MF.getFunction()); |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 567 | |
Chris Lattner | 25d812b | 2009-09-16 00:35:39 +0000 | [diff] [blame] | 568 | if (VerboseAsm) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 569 | LI = &getAnalysis<MachineLoopInfo>(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 570 | } |
| 571 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 572 | namespace { |
| 573 | // SectionCPs - Keep track the alignment, constpool entries per Section. |
| 574 | struct SectionCPs { |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 575 | const MCSection *S; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 576 | unsigned Alignment; |
| 577 | SmallVector<unsigned, 4> CPEs; |
Douglas Gregor | cabdd74 | 2009-12-19 07:05:23 +0000 | [diff] [blame] | 578 | SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {} |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 579 | }; |
| 580 | } |
| 581 | |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 582 | /// EmitConstantPool - Print to the current output stream assembly |
| 583 | /// representations of the constants in the constant pool MCP. This is |
| 584 | /// used to print out constants which have been "spilled to memory" by |
| 585 | /// the code generator. |
| 586 | /// |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 587 | void AsmPrinter::EmitConstantPool() { |
| 588 | const MachineConstantPool *MCP = MF->getConstantPool(); |
Chris Lattner | fa77d43 | 2006-02-09 04:22:52 +0000 | [diff] [blame] | 589 | const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants(); |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 590 | if (CP.empty()) return; |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 591 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 592 | // Calculate sections for constant pool entries. We collect entries to go into |
| 593 | // the same section together to reduce amount of section switch statements. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 594 | SmallVector<SectionCPs, 4> CPSections; |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 595 | for (unsigned i = 0, e = CP.size(); i != e; ++i) { |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 596 | const MachineConstantPoolEntry &CPE = CP[i]; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 597 | unsigned Align = CPE.getAlignment(); |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 598 | |
| 599 | SectionKind Kind; |
| 600 | switch (CPE.getRelocationInfo()) { |
| 601 | default: llvm_unreachable("Unknown section kind"); |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 602 | case 2: Kind = SectionKind::getReadOnlyWithRel(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 603 | case 1: |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 604 | Kind = SectionKind::getReadOnlyWithRelLocal(); |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 605 | break; |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 606 | case 0: |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 607 | switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) { |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 608 | case 4: Kind = SectionKind::getMergeableConst4(); break; |
| 609 | case 8: Kind = SectionKind::getMergeableConst8(); break; |
| 610 | case 16: Kind = SectionKind::getMergeableConst16();break; |
| 611 | default: Kind = SectionKind::getMergeableConst(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 612 | } |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 613 | } |
| 614 | |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 615 | const MCSection *S = getObjFileLowering().getSectionForConstant(Kind); |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 616 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 617 | // The number of sections are small, just do a linear search from the |
| 618 | // last section to the first. |
| 619 | bool Found = false; |
| 620 | unsigned SecIdx = CPSections.size(); |
| 621 | while (SecIdx != 0) { |
| 622 | if (CPSections[--SecIdx].S == S) { |
| 623 | Found = true; |
| 624 | break; |
| 625 | } |
| 626 | } |
| 627 | if (!Found) { |
| 628 | SecIdx = CPSections.size(); |
| 629 | CPSections.push_back(SectionCPs(S, Align)); |
| 630 | } |
| 631 | |
| 632 | if (Align > CPSections[SecIdx].Alignment) |
| 633 | CPSections[SecIdx].Alignment = Align; |
| 634 | CPSections[SecIdx].CPEs.push_back(i); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 635 | } |
| 636 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 637 | // Now print stuff into the calculated sections. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 638 | for (unsigned i = 0, e = CPSections.size(); i != e; ++i) { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 639 | OutStreamer.SwitchSection(CPSections[i].S); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 640 | EmitAlignment(Log2_32(CPSections[i].Alignment)); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 641 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 642 | unsigned Offset = 0; |
| 643 | for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) { |
| 644 | unsigned CPI = CPSections[i].CPEs[j]; |
| 645 | MachineConstantPoolEntry CPE = CP[CPI]; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 646 | |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 647 | // Emit inter-object padding for alignment. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 648 | unsigned AlignMask = CPE.getAlignment() - 1; |
| 649 | unsigned NewOffset = (Offset + AlignMask) & ~AlignMask; |
Chris Lattner | aaec205 | 2010-01-19 19:46:13 +0000 | [diff] [blame] | 650 | OutStreamer.EmitFill(NewOffset - Offset, 0/*fillval*/, 0/*addrspace*/); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 651 | |
| 652 | const Type *Ty = CPE.getType(); |
Duncan Sands | 777d230 | 2009-05-09 07:06:46 +0000 | [diff] [blame] | 653 | Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 654 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 655 | // Emit the label with a comment on it. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 656 | if (VerboseAsm) { |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 657 | OutStreamer.GetCommentOS() << "constant pool "; |
| 658 | WriteTypeSymbolic(OutStreamer.GetCommentOS(), CPE.getType(), |
| 659 | MF->getFunction()->getParent()); |
| 660 | OutStreamer.GetCommentOS() << '\n'; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 661 | } |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 662 | OutStreamer.EmitLabel(GetCPISymbol(CPI)); |
| 663 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 664 | if (CPE.isMachineConstantPoolEntry()) |
| 665 | EmitMachineConstantPoolValue(CPE.Val.MachineCPVal); |
| 666 | else |
| 667 | EmitGlobalConstant(CPE.Val.ConstVal); |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 668 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 669 | } |
| 670 | } |
| 671 | |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 672 | /// EmitJumpTableInfo - Print assembly representations of the jump tables used |
| 673 | /// by the current function to the current output stream. |
| 674 | /// |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 675 | void AsmPrinter::EmitJumpTableInfo() { |
| 676 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
Chris Lattner | 44e8725 | 2010-01-25 22:41:33 +0000 | [diff] [blame] | 677 | if (MJTI == 0) return; |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 678 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return; |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 679 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 680 | if (JT.empty()) return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 681 | |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 682 | // Pick the directive to use to print the jump table entries, and switch to |
| 683 | // the appropriate section. |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 684 | const Function *F = MF->getFunction(); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 685 | bool JTInDiffSection = false; |
Chris Lattner | f1214cb | 2010-01-26 06:53:37 +0000 | [diff] [blame] | 686 | if (// In PIC mode, we need to emit the jump table to the same section as the |
| 687 | // function body itself, otherwise the label differences won't make sense. |
| 688 | // FIXME: Need a better predicate for this: what about custom entries? |
| 689 | MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 || |
| 690 | // We should also do if the section name is NULL or function is declared |
| 691 | // in discardable section |
| 692 | // FIXME: this isn't the right predicate, should be based on the MCSection |
| 693 | // for the function. |
| 694 | F->isWeakForLinker()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 695 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM)); |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 696 | } else { |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 697 | // Otherwise, drop it in the readonly section. |
| 698 | const MCSection *ReadOnlySection = |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 699 | getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly()); |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 700 | OutStreamer.SwitchSection(ReadOnlySection); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 701 | JTInDiffSection = true; |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 702 | } |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 703 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 704 | EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getTargetData()))); |
Chris Lattner | 0c4e678 | 2006-07-15 01:34:12 +0000 | [diff] [blame] | 705 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 706 | for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) { |
| 707 | const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs; |
Chris Lattner | 0737188 | 2006-10-28 18:10:06 +0000 | [diff] [blame] | 708 | |
| 709 | // If this jump table was deleted, ignore it. |
| 710 | if (JTBBs.empty()) continue; |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 711 | |
Chris Lattner | e35df92 | 2010-01-26 05:15:20 +0000 | [diff] [blame] | 712 | // For the EK_LabelDifference32 entry, if the target supports .set, emit a |
| 713 | // .set directive for each unique entry. This reduces the number of |
| 714 | // relocations the assembler will generate for the jump table. |
| 715 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 && |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 716 | MAI->hasSetDirective()) { |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 717 | SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets; |
| 718 | const TargetLowering *TLI = TM.getTargetLowering(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 719 | const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 720 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) { |
| 721 | const MachineBasicBlock *MBB = JTBBs[ii]; |
| 722 | if (!EmittedSets.insert(MBB)) continue; |
| 723 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 724 | // .set LJTSet, LBB32-base |
| 725 | const MCExpr *LHS = |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 726 | MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 727 | OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()), |
| 728 | MCBinaryExpr::CreateSub(LHS, Base, OutContext)); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 729 | } |
| 730 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 731 | |
Chris Lattner | 7c30191 | 2009-09-13 19:02:16 +0000 | [diff] [blame] | 732 | // On some targets (e.g. Darwin) we want to emit two consequtive labels |
Chris Lattner | 393a8ee | 2007-01-18 01:12:56 +0000 | [diff] [blame] | 733 | // before each jump table. The first label is never referenced, but tells |
| 734 | // the assembler and linker the extents of the jump table object. The |
| 735 | // second label is actually referenced by the code. |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 736 | if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0]) |
Chris Lattner | beeb93e | 2010-01-26 05:58:28 +0000 | [diff] [blame] | 737 | // FIXME: This doesn't have to have any specific name, just any randomly |
| 738 | // named and numbered 'l' label would work. Simplify GetJTISymbol. |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 739 | OutStreamer.EmitLabel(GetJTISymbol(JTI, true)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 740 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 741 | OutStreamer.EmitLabel(GetJTISymbol(JTI)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 742 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 743 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 744 | EmitJumpTableEntry(MJTI, JTBBs[ii], JTI); |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 745 | } |
| 746 | } |
| 747 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 748 | /// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the |
| 749 | /// current stream. |
| 750 | void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 751 | const MachineBasicBlock *MBB, |
| 752 | unsigned UID) const { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 753 | const MCExpr *Value = 0; |
| 754 | switch (MJTI->getEntryKind()) { |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 755 | case MachineJumpTableInfo::EK_Inline: |
| 756 | llvm_unreachable("Cannot emit EK_Inline jump table entry"); break; |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 757 | case MachineJumpTableInfo::EK_Custom32: |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 758 | Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID, |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 759 | OutContext); |
| 760 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 761 | case MachineJumpTableInfo::EK_BlockAddress: |
| 762 | // EK_BlockAddress - Each entry is a plain address of block, e.g.: |
| 763 | // .word LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 764 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 765 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 766 | case MachineJumpTableInfo::EK_GPRel32BlockAddress: { |
| 767 | // EK_GPRel32BlockAddress - Each entry is an address of block, encoded |
| 768 | // with a relocation as gp-relative, e.g.: |
| 769 | // .gprel32 LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 770 | MCSymbol *MBBSym = MBB->getSymbol(); |
Chris Lattner | 718fb59 | 2010-01-25 21:28:50 +0000 | [diff] [blame] | 771 | OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext)); |
Chris Lattner | 78f485a | 2010-01-25 21:10:10 +0000 | [diff] [blame] | 772 | return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 773 | } |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 774 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 775 | case MachineJumpTableInfo::EK_LabelDifference32: { |
| 776 | // EK_LabelDifference32 - Each entry is the address of the block minus |
| 777 | // the address of the jump table. This is used for PIC jump tables where |
| 778 | // gprel32 is not supported. e.g.: |
| 779 | // .word LBB123 - LJTI1_2 |
| 780 | // If the .set directive is supported, this is emitted as: |
| 781 | // .set L4_5_set_123, LBB123 - LJTI1_2 |
| 782 | // .word L4_5_set_123 |
| 783 | |
| 784 | // If we have emitted set directives for the jump table entries, print |
| 785 | // them rather than the entries themselves. If we're emitting PIC, then |
| 786 | // emit the table entries as differences between two text section labels. |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 787 | if (MAI->hasSetDirective()) { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 788 | // If we used .set, reference the .set's symbol. |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 789 | Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()), |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 790 | OutContext); |
| 791 | break; |
| 792 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 793 | // Otherwise, use the difference as the jump table entry. |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 794 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 795 | const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 796 | Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext); |
| 797 | break; |
| 798 | } |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 799 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 800 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 801 | assert(Value && "Unknown entry kind!"); |
| 802 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 803 | unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData()); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 804 | OutStreamer.EmitValue(Value, EntrySize, /*addrspace*/0); |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 805 | } |
| 806 | |
| 807 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 808 | /// EmitSpecialLLVMGlobal - Check to see if the specified global is a |
| 809 | /// special global used by LLVM. If so, emit it and return true, otherwise |
| 810 | /// do nothing and return false. |
| 811 | bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) { |
Daniel Dunbar | 03d7651 | 2009-07-25 23:55:21 +0000 | [diff] [blame] | 812 | if (GV->getName() == "llvm.used") { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 813 | if (MAI->hasNoDeadStrip()) // No need to emit this at all. |
Andrew Lenharth | b753a9b | 2007-08-22 19:33:11 +0000 | [diff] [blame] | 814 | EmitLLVMUsedList(GV->getInitializer()); |
| 815 | return true; |
| 816 | } |
| 817 | |
Chris Lattner | 401e10c | 2009-07-20 06:14:25 +0000 | [diff] [blame] | 818 | // Ignore debug and non-emitted data. This handles llvm.compiler.used. |
Chris Lattner | 266c7bb | 2009-04-13 05:44:34 +0000 | [diff] [blame] | 819 | if (GV->getSection() == "llvm.metadata" || |
| 820 | GV->hasAvailableExternallyLinkage()) |
| 821 | return true; |
Jim Laskey | 7809811 | 2006-03-07 22:00:35 +0000 | [diff] [blame] | 822 | |
| 823 | if (!GV->hasAppendingLinkage()) return false; |
| 824 | |
| 825 | assert(GV->hasInitializer() && "Not a special LLVM global!"); |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 826 | |
Evan Cheng | 916d07c | 2007-06-04 20:39:18 +0000 | [diff] [blame] | 827 | const TargetData *TD = TM.getTargetData(); |
| 828 | unsigned Align = Log2_32(TD->getPointerPrefAlignment()); |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 829 | if (GV->getName() == "llvm.global_ctors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 830 | OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection()); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 831 | EmitAlignment(Align, 0); |
| 832 | EmitXXStructorList(GV->getInitializer()); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 833 | |
| 834 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 835 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 836 | StringRef Sym(".constructors_used"); |
| 837 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 838 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 839 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 840 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 841 | } |
| 842 | |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 843 | if (GV->getName() == "llvm.global_dtors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 844 | OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection()); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 845 | EmitAlignment(Align, 0); |
| 846 | EmitXXStructorList(GV->getInitializer()); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 847 | |
| 848 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 849 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 850 | StringRef Sym(".destructors_used"); |
| 851 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 852 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 853 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 854 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 855 | } |
| 856 | |
| 857 | return false; |
| 858 | } |
| 859 | |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 860 | /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each |
Dale Johannesen | d2e51af | 2008-09-09 22:29:13 +0000 | [diff] [blame] | 861 | /// global in the specified llvm.used list for which emitUsedDirectiveFor |
| 862 | /// is true, as being used with this directive. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 863 | void AsmPrinter::EmitLLVMUsedList(Constant *List) { |
Dan Gohman | a119de8 | 2009-06-14 23:30:43 +0000 | [diff] [blame] | 864 | // Should be an array of 'i8*'. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 865 | ConstantArray *InitList = dyn_cast<ConstantArray>(List); |
| 866 | if (InitList == 0) return; |
| 867 | |
| 868 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
Chris Lattner | 16fe990 | 2009-07-17 22:00:23 +0000 | [diff] [blame] | 869 | const GlobalValue *GV = |
| 870 | dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts()); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 871 | if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 872 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip); |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 873 | } |
| 874 | } |
| 875 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 876 | /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the |
| 877 | /// function pointers, ignoring the init priority. |
| 878 | void AsmPrinter::EmitXXStructorList(Constant *List) { |
| 879 | // Should be an array of '{ int, void ()* }' structs. The first value is the |
| 880 | // init priority, which we ignore. |
| 881 | if (!isa<ConstantArray>(List)) return; |
| 882 | ConstantArray *InitList = cast<ConstantArray>(List); |
| 883 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) |
| 884 | if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){ |
| 885 | if (CS->getNumOperands() != 2) return; // Not array of 2-element structs. |
Chris Lattner | 8de324b | 2005-12-21 01:17:37 +0000 | [diff] [blame] | 886 | |
| 887 | if (CS->getOperand(1)->isNullValue()) |
| 888 | return; // Found a null terminator, exit printing. |
| 889 | // Emit the function pointer. |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 890 | EmitGlobalConstant(CS->getOperand(1)); |
| 891 | } |
| 892 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 893 | |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 894 | /// EmitInlineAsm - Emit a blob of inline asm to the output streamer. |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 895 | void AsmPrinter::EmitInlineAsm(StringRef Str) const { |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 896 | assert(!Str.empty() && "Can't emit empty inline asm block"); |
| 897 | |
| 898 | // If the output streamer is actually a .s file, just emit the blob textually. |
| 899 | // This is useful in case the asm parser doesn't handle something but the |
| 900 | // system assembler does. |
| 901 | if (OutStreamer.hasRawTextSupport()) { |
| 902 | OutStreamer.EmitRawText(Str); |
| 903 | return; |
| 904 | } |
| 905 | |
| 906 | errs() << "Inline asm not supported by this streamer!\n"; |
| 907 | } |
| 908 | |
| 909 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 910 | //===--------------------------------------------------------------------===// |
| 911 | // Emission and print routines |
| 912 | // |
| 913 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 914 | /// EmitInt8 - Emit a byte directive and value. |
| 915 | /// |
| 916 | void AsmPrinter::EmitInt8(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 917 | OutStreamer.EmitIntValue(Value, 1, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 918 | } |
| 919 | |
| 920 | /// EmitInt16 - Emit a short directive and value. |
| 921 | /// |
| 922 | void AsmPrinter::EmitInt16(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 923 | OutStreamer.EmitIntValue(Value, 2, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 924 | } |
| 925 | |
| 926 | /// EmitInt32 - Emit a long directive and value. |
| 927 | /// |
| 928 | void AsmPrinter::EmitInt32(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 929 | OutStreamer.EmitIntValue(Value, 4, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 930 | } |
| 931 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 932 | /// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size |
| 933 | /// in bytes of the directive is specified by Size and Hi/Lo specify the |
| 934 | /// labels. This implicitly uses .set if it is available. |
| 935 | void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo, |
| 936 | unsigned Size) const { |
| 937 | // Get the Hi-Lo expression. |
| 938 | const MCExpr *Diff = |
| 939 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext), |
| 940 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 941 | OutContext); |
| 942 | |
| 943 | if (!MAI->hasSetDirective()) { |
| 944 | OutStreamer.EmitValue(Diff, Size, 0/*AddrSpace*/); |
| 945 | return; |
| 946 | } |
| 947 | |
| 948 | // Otherwise, emit with .set (aka assignment). |
| 949 | MCSymbol *SetLabel = |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 950 | OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + |
| 951 | "set" + Twine(SetCounter++)); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 952 | OutStreamer.EmitAssignment(SetLabel, Diff); |
Chris Lattner | 6cde3e6 | 2010-03-09 00:39:24 +0000 | [diff] [blame] | 953 | OutStreamer.EmitSymbolValue(SetLabel, Size, 0/*AddrSpace*/); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 957 | //===----------------------------------------------------------------------===// |
| 958 | |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 959 | // EmitAlignment - Emit an alignment directive to the specified power of |
| 960 | // two boundary. For example, if you pass in 3 here, you will get an 8 |
| 961 | // byte alignment. If a global value is specified, and if that global has |
| 962 | // an explicit alignment requested, it will unconditionally override the |
| 963 | // alignment request. However, if ForcedAlignBits is specified, this value |
| 964 | // has final say: the ultimate alignment will be the max of ForcedAlignBits |
| 965 | // and the alignment computed with NumBits and the global. |
| 966 | // |
| 967 | // The algorithm is: |
| 968 | // Align = NumBits; |
| 969 | // if (GV && GV->hasalignment) Align = GV->getalignment(); |
| 970 | // Align = std::max(Align, ForcedAlignBits); |
| 971 | // |
| 972 | void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV, |
Evan Cheng | 05548eb | 2008-02-29 19:36:59 +0000 | [diff] [blame] | 973 | unsigned ForcedAlignBits, |
| 974 | bool UseFillExpr) const { |
Dale Johannesen | 00d56b9 | 2007-04-23 23:33:31 +0000 | [diff] [blame] | 975 | if (GV && GV->getAlignment()) |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 976 | NumBits = Log2_32(GV->getAlignment()); |
| 977 | NumBits = std::max(NumBits, ForcedAlignBits); |
| 978 | |
Chris Lattner | 2a21c6e | 2005-11-10 18:09:27 +0000 | [diff] [blame] | 979 | if (NumBits == 0) return; // No need to emit alignment. |
Chris Lattner | 663c2d2 | 2009-08-19 06:12:02 +0000 | [diff] [blame] | 980 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 981 | if (getCurrentSection()->getKind().isText()) |
Chris Lattner | 2cce371 | 2010-02-23 18:46:22 +0000 | [diff] [blame] | 982 | OutStreamer.EmitCodeAlignment(1 << NumBits); |
| 983 | else |
| 984 | OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0); |
Chris Lattner | bfddc20 | 2004-08-17 19:14:29 +0000 | [diff] [blame] | 985 | } |
David Greene | a5bb59f | 2009-08-05 21:00:52 +0000 | [diff] [blame] | 986 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 987 | /// LowerConstant - Lower the specified LLVM Constant to an MCExpr. |
| 988 | /// |
| 989 | static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) { |
| 990 | MCContext &Ctx = AP.OutContext; |
| 991 | |
| 992 | if (CV->isNullValue() || isa<UndefValue>(CV)) |
| 993 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 994 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 995 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) |
| 996 | return MCConstantExpr::Create(CI->getZExtValue(), Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 997 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 998 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 999 | return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1000 | if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) |
| 1001 | return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1002 | |
| 1003 | const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV); |
| 1004 | if (CE == 0) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1005 | llvm_unreachable("Unknown constant value to lower!"); |
| 1006 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | switch (CE->getOpcode()) { |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1010 | default: |
| 1011 | // If the code isn't optimized, there may be outstanding folding |
| 1012 | // opportunities. Attempt to fold the expression using TargetData as a |
| 1013 | // last resort before giving up. |
Dan Gohman | 54e72ec | 2010-02-08 22:19:11 +0000 | [diff] [blame] | 1014 | if (Constant *C = |
| 1015 | ConstantFoldConstantExpression(CE, AP.TM.getTargetData())) |
| 1016 | if (C != CE) |
| 1017 | return LowerConstant(C, AP); |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1018 | #ifndef NDEBUG |
| 1019 | CE->dump(); |
| 1020 | #endif |
| 1021 | llvm_unreachable("FIXME: Don't support this constant expr"); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1022 | case Instruction::GetElementPtr: { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1023 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1024 | // Generate a symbolic expression for the byte address |
| 1025 | const Constant *PtrVal = CE->getOperand(0); |
| 1026 | SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end()); |
| 1027 | int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), &IdxVec[0], |
| 1028 | IdxVec.size()); |
| 1029 | |
| 1030 | const MCExpr *Base = LowerConstant(CE->getOperand(0), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1031 | if (Offset == 0) |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1032 | return Base; |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1033 | |
| 1034 | // Truncate/sext the offset to the pointer size. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1035 | if (TD.getPointerSizeInBits() != 64) { |
| 1036 | int SExtAmount = 64-TD.getPointerSizeInBits(); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1037 | Offset = (Offset << SExtAmount) >> SExtAmount; |
| 1038 | } |
| 1039 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1040 | return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx), |
| 1041 | Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1042 | } |
| 1043 | |
| 1044 | case Instruction::Trunc: |
| 1045 | // We emit the value and depend on the assembler to truncate the generated |
| 1046 | // expression properly. This is important for differences between |
| 1047 | // blockaddress labels. Since the two labels are in the same function, it |
| 1048 | // is reasonable to treat their delta as a 32-bit value. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1049 | // FALL THROUGH. |
| 1050 | case Instruction::BitCast: |
| 1051 | return LowerConstant(CE->getOperand(0), AP); |
| 1052 | |
| 1053 | case Instruction::IntToPtr: { |
| 1054 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1055 | // Handle casts to pointers by changing them into casts to the appropriate |
| 1056 | // integer type. This promotes constant folding and simplifies this code. |
| 1057 | Constant *Op = CE->getOperand(0); |
| 1058 | Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()), |
| 1059 | false/*ZExt*/); |
| 1060 | return LowerConstant(Op, AP); |
| 1061 | } |
| 1062 | |
| 1063 | case Instruction::PtrToInt: { |
| 1064 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1065 | // Support only foldable casts to/from pointers that can be eliminated by |
| 1066 | // changing the pointer to the appropriately sized integer type. |
| 1067 | Constant *Op = CE->getOperand(0); |
| 1068 | const Type *Ty = CE->getType(); |
| 1069 | |
| 1070 | const MCExpr *OpExpr = LowerConstant(Op, AP); |
| 1071 | |
| 1072 | // We can emit the pointer value into this slot if the slot is an |
| 1073 | // integer slot equal to the size of the pointer. |
| 1074 | if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType())) |
| 1075 | return OpExpr; |
| 1076 | |
| 1077 | // Otherwise the pointer is smaller than the resultant integer, mask off |
| 1078 | // the high bits so we are sure to get a proper truncation if the input is |
| 1079 | // a constant expr. |
| 1080 | unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType()); |
| 1081 | const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx); |
| 1082 | return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx); |
| 1083 | } |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1084 | |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1085 | // The MC library also has a right-shift operator, but it isn't consistently |
| 1086 | // signed or unsigned between different targets. |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1087 | case Instruction::Add: |
| 1088 | case Instruction::Sub: |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1089 | case Instruction::Mul: |
| 1090 | case Instruction::SDiv: |
| 1091 | case Instruction::SRem: |
| 1092 | case Instruction::Shl: |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1093 | case Instruction::And: |
| 1094 | case Instruction::Or: |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1095 | case Instruction::Xor: { |
| 1096 | const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP); |
| 1097 | const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1098 | switch (CE->getOpcode()) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1099 | default: llvm_unreachable("Unknown binary operator constant cast expr"); |
| 1100 | case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx); |
| 1101 | case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx); |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1102 | case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx); |
| 1103 | case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx); |
| 1104 | case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx); |
| 1105 | case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1106 | case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx); |
| 1107 | case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx); |
| 1108 | case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1109 | } |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1110 | } |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 1111 | } |
| 1112 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1113 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1114 | static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace, |
| 1115 | AsmPrinter &AP) { |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1116 | if (AddrSpace != 0 || !CA->isString()) { |
| 1117 | // Not a string. Print the values in successive locations |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1118 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1119 | AP.EmitGlobalConstant(CA->getOperand(i), AddrSpace); |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1120 | return; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1121 | } |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1122 | |
| 1123 | // Otherwise, it can be emitted as .ascii. |
| 1124 | SmallVector<char, 128> TmpVec; |
| 1125 | TmpVec.reserve(CA->getNumOperands()); |
| 1126 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1127 | TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue()); |
| 1128 | |
| 1129 | AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1130 | } |
| 1131 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1132 | static void EmitGlobalConstantVector(const ConstantVector *CV, |
| 1133 | unsigned AddrSpace, AsmPrinter &AP) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1134 | for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i) |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1135 | AP.EmitGlobalConstant(CV->getOperand(i), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1136 | } |
| 1137 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1138 | static void EmitGlobalConstantStruct(const ConstantStruct *CS, |
| 1139 | unsigned AddrSpace, AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1140 | // Print the fields in successive locations. Pad to align if needed! |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1141 | const TargetData *TD = AP.TM.getTargetData(); |
| 1142 | unsigned Size = TD->getTypeAllocSize(CS->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1143 | const StructLayout *Layout = TD->getStructLayout(CS->getType()); |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1144 | uint64_t SizeSoFar = 0; |
| 1145 | for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1146 | const Constant *Field = CS->getOperand(i); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1147 | |
| 1148 | // Check if padding is needed and insert one or more 0s. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1149 | uint64_t FieldSize = TD->getTypeAllocSize(Field->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1150 | uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1)) |
| 1151 | - Layout->getElementOffset(i)) - FieldSize; |
| 1152 | SizeSoFar += FieldSize + PadSize; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1153 | |
| 1154 | // Now print the actual field value. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1155 | AP.EmitGlobalConstant(Field, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1156 | |
| 1157 | // Insert padding - this may include padding to increase the size of the |
| 1158 | // current field up to the ABI size (if the struct is not packed) as well |
| 1159 | // 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] | 1160 | AP.OutStreamer.EmitZeros(PadSize, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1161 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1162 | assert(SizeSoFar == Layout->getSizeInBytes() && |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1163 | "Layout of constant struct may be incorrect!"); |
| 1164 | } |
| 1165 | |
Chris Lattner | 93b122d | 2010-03-16 21:25:55 +0000 | [diff] [blame] | 1166 | static void EmitGlobalConstantUnion(const ConstantUnion *CU, |
| 1167 | unsigned AddrSpace, AsmPrinter &AP) { |
| 1168 | const TargetData *TD = AP.TM.getTargetData(); |
| 1169 | unsigned Size = TD->getTypeAllocSize(CU->getType()); |
| 1170 | |
| 1171 | const Constant *Contents = CU->getOperand(0); |
| 1172 | unsigned FilledSize = TD->getTypeAllocSize(Contents->getType()); |
| 1173 | |
| 1174 | // Print the actually filled part |
| 1175 | AP.EmitGlobalConstant(Contents, AddrSpace); |
| 1176 | |
| 1177 | // And pad with enough zeroes |
| 1178 | AP.OutStreamer.EmitZeros(Size-FilledSize, AddrSpace); |
| 1179 | } |
| 1180 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1181 | static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace, |
| 1182 | AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1183 | // FP Constants are printed as integer constants to avoid losing |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1184 | // precision. |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1185 | if (CFP->getType()->isDoubleTy()) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1186 | if (AP.VerboseAsm) { |
Chris Lattner | d79d9dc | 2010-01-22 19:17:48 +0000 | [diff] [blame] | 1187 | double Val = CFP->getValueAPF().convertToDouble(); |
| 1188 | AP.OutStreamer.GetCommentOS() << "double " << Val << '\n'; |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1189 | } |
| 1190 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1191 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1192 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1193 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1194 | } |
| 1195 | |
| 1196 | if (CFP->getType()->isFloatTy()) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1197 | if (AP.VerboseAsm) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1198 | float Val = CFP->getValueAPF().convertToFloat(); |
| 1199 | AP.OutStreamer.GetCommentOS() << "float " << Val << '\n'; |
Dan Gohman | a12e9d7 | 2009-08-12 18:32:22 +0000 | [diff] [blame] | 1200 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1201 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1202 | AP.OutStreamer.EmitIntValue(Val, 4, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1203 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1204 | } |
| 1205 | |
| 1206 | if (CFP->getType()->isX86_FP80Ty()) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1207 | // all long double variants are printed as hex |
| 1208 | // api needed to prevent premature destruction |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1209 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1210 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1211 | if (AP.VerboseAsm) { |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1212 | // Convert to double so we can print the approximate val as a comment. |
| 1213 | APFloat DoubleVal = CFP->getValueAPF(); |
| 1214 | bool ignored; |
| 1215 | DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 1216 | &ignored); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1217 | AP.OutStreamer.GetCommentOS() << "x86_fp80 ~= " |
| 1218 | << DoubleVal.convertToDouble() << '\n'; |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1219 | } |
| 1220 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1221 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1222 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
| 1223 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1224 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1225 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1226 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1227 | } |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1228 | |
| 1229 | // Emit the tail padding for the long double. |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1230 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1231 | AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) - |
| 1232 | TD.getTypeStoreSize(CFP->getType()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1233 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1234 | } |
| 1235 | |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1236 | assert(CFP->getType()->isPPC_FP128Ty() && |
| 1237 | "Floating point constant type not handled"); |
| 1238 | // All long double variants are printed as hex api needed to prevent |
| 1239 | // premature destruction. |
| 1240 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1241 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1242 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1243 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1244 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1245 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1246 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
| 1247 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1248 | } |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1249 | } |
| 1250 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1251 | static void EmitGlobalConstantLargeInt(const ConstantInt *CI, |
| 1252 | unsigned AddrSpace, AsmPrinter &AP) { |
| 1253 | const TargetData *TD = AP.TM.getTargetData(); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1254 | unsigned BitWidth = CI->getBitWidth(); |
Chris Lattner | 38c2b0a | 2010-01-13 04:39:46 +0000 | [diff] [blame] | 1255 | assert((BitWidth & 63) == 0 && "only support multiples of 64-bits"); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1256 | |
| 1257 | // We don't expect assemblers to support integer data directives |
| 1258 | // for more than 64 bits, so we emit the data in at most 64-bit |
| 1259 | // quantities at a time. |
| 1260 | const uint64_t *RawData = CI->getValue().getRawData(); |
| 1261 | for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1262 | uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i]; |
| 1263 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1264 | } |
| 1265 | } |
| 1266 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 1267 | /// EmitGlobalConstant - Print a general LLVM constant to the .s file. |
Sanjiv Gupta | c8d7bc8 | 2009-01-30 04:25:10 +0000 | [diff] [blame] | 1268 | void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) { |
Chris Lattner | 043c4e5 | 2010-01-20 07:19:19 +0000 | [diff] [blame] | 1269 | if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1270 | uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
Bill Wendling | 744f579 | 2010-02-05 00:17:02 +0000 | [diff] [blame] | 1271 | if (Size == 0) Size = 1; // An empty "_foo:" followed by a section is undef. |
Chris Lattner | 6449abf | 2010-01-19 21:51:22 +0000 | [diff] [blame] | 1272 | return OutStreamer.EmitZeros(Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1273 | } |
| 1274 | |
| 1275 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { |
| 1276 | unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1277 | switch (Size) { |
| 1278 | case 1: |
| 1279 | case 2: |
| 1280 | case 4: |
| 1281 | case 8: |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1282 | if (VerboseAsm) |
| 1283 | OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1284 | OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace); |
| 1285 | return; |
| 1286 | default: |
| 1287 | EmitGlobalConstantLargeInt(CI, AddrSpace, *this); |
| 1288 | return; |
| 1289 | } |
| 1290 | } |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1291 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1292 | if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) |
| 1293 | return EmitGlobalConstantArray(CVA, AddrSpace, *this); |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1294 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1295 | if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) |
| 1296 | return EmitGlobalConstantStruct(CVS, AddrSpace, *this); |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1297 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1298 | if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1299 | return EmitGlobalConstantFP(CFP, AddrSpace, *this); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1300 | |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1301 | if (isa<ConstantPointerNull>(CV)) { |
| 1302 | unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1303 | OutStreamer.EmitIntValue(0, Size, AddrSpace); |
| 1304 | return; |
| 1305 | } |
| 1306 | |
Chris Lattner | 93b122d | 2010-03-16 21:25:55 +0000 | [diff] [blame] | 1307 | if (const ConstantUnion *CVU = dyn_cast<ConstantUnion>(CV)) |
| 1308 | return EmitGlobalConstantUnion(CVU, AddrSpace, *this); |
| 1309 | |
| 1310 | if (const ConstantVector *V = dyn_cast<ConstantVector>(CV)) |
| 1311 | return EmitGlobalConstantVector(V, AddrSpace, *this); |
| 1312 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1313 | // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it |
| 1314 | // thread the streamer with EmitValue. |
| 1315 | OutStreamer.EmitValue(LowerConstant(CV, *this), |
| 1316 | TM.getTargetData()->getTypeAllocSize(CV->getType()), |
| 1317 | AddrSpace); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1318 | } |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1319 | |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 1320 | void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) { |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1321 | // Target doesn't support this yet! |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1322 | llvm_unreachable("Target does not support EmitMachineConstantPoolValue"); |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1323 | } |
| 1324 | |
Chris Lattner | 3ce9b67 | 2006-09-26 23:59:50 +0000 | [diff] [blame] | 1325 | /// PrintSpecial - Print information related to the specified machine instr |
| 1326 | /// that is independent of the operand, and may be independent of the instr |
| 1327 | /// itself. This can be useful for portably encoding the comment character |
| 1328 | /// or other bits of target-specific knowledge into the asmstrings. The |
| 1329 | /// syntax used is ${:comment}. Targets can override this to add support |
| 1330 | /// for their own strange codes. |
Chris Lattner | 35c33bd | 2010-04-04 04:47:45 +0000 | [diff] [blame] | 1331 | void AsmPrinter::PrintSpecial(const MachineInstr *MI, raw_ostream &OS, |
| 1332 | const char *Code) const { |
Chris Lattner | bae02cf | 2006-09-27 00:06:07 +0000 | [diff] [blame] | 1333 | if (!strcmp(Code, "private")) { |
Chris Lattner | 35c33bd | 2010-04-04 04:47:45 +0000 | [diff] [blame] | 1334 | OS << MAI->getPrivateGlobalPrefix(); |
Chris Lattner | bae02cf | 2006-09-27 00:06:07 +0000 | [diff] [blame] | 1335 | } else if (!strcmp(Code, "comment")) { |
Chris Lattner | 35c33bd | 2010-04-04 04:47:45 +0000 | [diff] [blame] | 1336 | OS << MAI->getCommentString(); |
Chris Lattner | 3ce9b67 | 2006-09-26 23:59:50 +0000 | [diff] [blame] | 1337 | } else if (!strcmp(Code, "uid")) { |
Chris Lattner | b6a24bf | 2007-02-05 21:23:52 +0000 | [diff] [blame] | 1338 | // Comparing the address of MI isn't sufficient, because machineinstrs may |
| 1339 | // be allocated to the same address across functions. |
| 1340 | const Function *ThisF = MI->getParent()->getParent()->getFunction(); |
| 1341 | |
Owen Anderson | bd58edf | 2009-06-24 22:28:12 +0000 | [diff] [blame] | 1342 | // If this is a new LastFn instruction, bump the counter. |
| 1343 | if (LastMI != MI || LastFn != ThisF) { |
Chris Lattner | b6a24bf | 2007-02-05 21:23:52 +0000 | [diff] [blame] | 1344 | ++Counter; |
| 1345 | LastMI = MI; |
Owen Anderson | bd58edf | 2009-06-24 22:28:12 +0000 | [diff] [blame] | 1346 | LastFn = ThisF; |
Chris Lattner | b6a24bf | 2007-02-05 21:23:52 +0000 | [diff] [blame] | 1347 | } |
Chris Lattner | 35c33bd | 2010-04-04 04:47:45 +0000 | [diff] [blame] | 1348 | OS << Counter; |
Chris Lattner | 3ce9b67 | 2006-09-26 23:59:50 +0000 | [diff] [blame] | 1349 | } else { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1350 | std::string msg; |
| 1351 | raw_string_ostream Msg(msg); |
| 1352 | Msg << "Unknown special formatter '" << Code |
Bill Wendling | e815619 | 2006-12-07 01:30:32 +0000 | [diff] [blame] | 1353 | << "' for machine instr: " << *MI; |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1354 | llvm_report_error(Msg.str()); |
Chris Lattner | 3ce9b67 | 2006-09-26 23:59:50 +0000 | [diff] [blame] | 1355 | } |
| 1356 | } |
| 1357 | |
Argyrios Kyrtzidis | cd76240 | 2009-05-07 13:55:51 +0000 | [diff] [blame] | 1358 | /// processDebugLoc - Processes the debug information of each machine |
| 1359 | /// instruction's DebugLoc. |
Devang Patel | af0e272 | 2009-10-06 02:19:11 +0000 | [diff] [blame] | 1360 | void AsmPrinter::processDebugLoc(const MachineInstr *MI, |
| 1361 | bool BeforePrintingInsn) { |
Devang Patel | 53bb5c9 | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 1362 | if (!MAI || !DW || !MAI->doesSupportDebugInformation() |
| 1363 | || !DW->ShouldEmitDwarfDebug()) |
Chris Lattner | d250329 | 2009-08-05 04:09:18 +0000 | [diff] [blame] | 1364 | return; |
Devang Patel | 53bb5c9 | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 1365 | |
Devang Patel | 553881b | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 1366 | if (!BeforePrintingInsn) |
Devang Patel | 53bb5c9 | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 1367 | // After printing instruction |
| 1368 | DW->EndScope(MI); |
Devang Patel | 553881b | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 1369 | else |
| 1370 | DW->BeginScope(MI); |
Argyrios Kyrtzidis | cd76240 | 2009-05-07 13:55:51 +0000 | [diff] [blame] | 1371 | } |
Chris Lattner | 3ce9b67 | 2006-09-26 23:59:50 +0000 | [diff] [blame] | 1372 | |
Devang Patel | 53bb5c9 | 2009-11-10 23:06:00 +0000 | [diff] [blame] | 1373 | |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1374 | /// printInlineAsm - This method formats and prints the specified machine |
| 1375 | /// instruction that is an inline asm. |
| 1376 | void AsmPrinter::printInlineAsm(const MachineInstr *MI) const { |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1377 | assert(MI->isInlineAsm() && "printInlineAsm only works on inline asms"); |
| 1378 | |
Chris Lattner | f2b67cf | 2006-01-30 23:00:08 +0000 | [diff] [blame] | 1379 | unsigned NumOperands = MI->getNumOperands(); |
| 1380 | |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1381 | // Count the number of register definitions to find the asm string. |
Chris Lattner | f2b67cf | 2006-01-30 23:00:08 +0000 | [diff] [blame] | 1382 | unsigned NumDefs = 0; |
Dan Gohman | d735b80 | 2008-10-03 15:45:36 +0000 | [diff] [blame] | 1383 | for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef(); |
Chris Lattner | 67942f5 | 2006-09-05 20:02:51 +0000 | [diff] [blame] | 1384 | ++NumDefs) |
Chris Lattner | f2b67cf | 2006-01-30 23:00:08 +0000 | [diff] [blame] | 1385 | assert(NumDefs != NumOperands-1 && "No asm string?"); |
| 1386 | |
Dan Gohman | d735b80 | 2008-10-03 15:45:36 +0000 | [diff] [blame] | 1387 | assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?"); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1388 | |
| 1389 | // Disassemble the AsmStr, printing out the literal pieces, the operands, etc. |
Chris Lattner | f2b67cf | 2006-01-30 23:00:08 +0000 | [diff] [blame] | 1390 | const char *AsmStr = MI->getOperand(NumDefs).getSymbolName(); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1391 | |
Dale Johannesen | ba2a0b9 | 2008-01-29 02:21:21 +0000 | [diff] [blame] | 1392 | // If this asmstr is empty, just print the #APP/#NOAPP markers. |
| 1393 | // These are useful to see where empty asm's wound up. |
Chris Lattner | f26f5dd | 2006-07-28 00:17:20 +0000 | [diff] [blame] | 1394 | if (AsmStr[0] == 0) { |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1395 | if (!OutStreamer.hasRawTextSupport()) return; |
| 1396 | |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1397 | OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+ |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1398 | MAI->getInlineAsmStart()); |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1399 | OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+ |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1400 | MAI->getInlineAsmEnd()); |
Chris Lattner | f26f5dd | 2006-07-28 00:17:20 +0000 | [diff] [blame] | 1401 | return; |
| 1402 | } |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1403 | |
| 1404 | // Emit the #APP start marker. This has to happen even if verbose-asm isn't |
| 1405 | // enabled, so we use EmitRawText. |
| 1406 | if (OutStreamer.hasRawTextSupport()) |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1407 | OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+ |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1408 | MAI->getInlineAsmStart()); |
| 1409 | |
| 1410 | // Emit the inline asm to a temporary string so we can emit it through |
| 1411 | // EmitInlineAsm. |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1412 | SmallString<256> StringData; |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1413 | raw_svector_ostream OS(StringData); |
Chris Lattner | f26f5dd | 2006-07-28 00:17:20 +0000 | [diff] [blame] | 1414 | |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1415 | OS << '\t'; |
Chris Lattner | f26f5dd | 2006-07-28 00:17:20 +0000 | [diff] [blame] | 1416 | |
Bill Wendling | eb9a42c | 2007-01-16 03:42:04 +0000 | [diff] [blame] | 1417 | // The variant of the current asmprinter. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 1418 | int AsmPrinterVariant = MAI->getAssemblerDialect(); |
Bill Wendling | eb9a42c | 2007-01-16 03:42:04 +0000 | [diff] [blame] | 1419 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1420 | int CurVariant = -1; // The number of the {.|.|.} region we are in. |
| 1421 | const char *LastEmitted = AsmStr; // One past the last character emitted. |
Chris Lattner | 2cc2f66 | 2006-02-01 01:28:23 +0000 | [diff] [blame] | 1422 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1423 | while (*LastEmitted) { |
| 1424 | switch (*LastEmitted) { |
| 1425 | default: { |
| 1426 | // Not a special case, emit the string section literally. |
| 1427 | const char *LiteralEnd = LastEmitted+1; |
| 1428 | while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' && |
Chris Lattner | 1c05997 | 2006-05-05 21:47:05 +0000 | [diff] [blame] | 1429 | *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n') |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1430 | ++LiteralEnd; |
| 1431 | if (CurVariant == -1 || CurVariant == AsmPrinterVariant) |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1432 | OS.write(LastEmitted, LiteralEnd-LastEmitted); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1433 | LastEmitted = LiteralEnd; |
| 1434 | break; |
| 1435 | } |
Chris Lattner | 1c05997 | 2006-05-05 21:47:05 +0000 | [diff] [blame] | 1436 | case '\n': |
| 1437 | ++LastEmitted; // Consume newline character. |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1438 | OS << '\n'; // Indent code with newline. |
Chris Lattner | 1c05997 | 2006-05-05 21:47:05 +0000 | [diff] [blame] | 1439 | break; |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1440 | case '$': { |
| 1441 | ++LastEmitted; // Consume '$' character. |
Chris Lattner | faf1dae | 2006-10-03 23:27:09 +0000 | [diff] [blame] | 1442 | bool Done = true; |
| 1443 | |
| 1444 | // Handle escapes. |
| 1445 | switch (*LastEmitted) { |
| 1446 | default: Done = false; break; |
| 1447 | case '$': // $$ -> $ |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1448 | if (CurVariant == -1 || CurVariant == AsmPrinterVariant) |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1449 | OS << '$'; |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1450 | ++LastEmitted; // Consume second '$' character. |
| 1451 | break; |
Chris Lattner | faf1dae | 2006-10-03 23:27:09 +0000 | [diff] [blame] | 1452 | case '(': // $( -> same as GCC's { character. |
| 1453 | ++LastEmitted; // Consume '(' character. |
| 1454 | if (CurVariant != -1) { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1455 | llvm_report_error("Nested variants found in inline asm string: '" |
| 1456 | + std::string(AsmStr) + "'"); |
Chris Lattner | faf1dae | 2006-10-03 23:27:09 +0000 | [diff] [blame] | 1457 | } |
| 1458 | CurVariant = 0; // We're in the first variant now. |
| 1459 | break; |
| 1460 | case '|': |
| 1461 | ++LastEmitted; // consume '|' character. |
Dale Johannesen | 8b1e054 | 2008-10-10 21:04:42 +0000 | [diff] [blame] | 1462 | if (CurVariant == -1) |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1463 | OS << '|'; // this is gcc's behavior for | outside a variant |
Dale Johannesen | 8b1e054 | 2008-10-10 21:04:42 +0000 | [diff] [blame] | 1464 | else |
| 1465 | ++CurVariant; // We're in the next variant. |
Chris Lattner | faf1dae | 2006-10-03 23:27:09 +0000 | [diff] [blame] | 1466 | break; |
| 1467 | case ')': // $) -> same as GCC's } char. |
| 1468 | ++LastEmitted; // consume ')' character. |
Dale Johannesen | 8b1e054 | 2008-10-10 21:04:42 +0000 | [diff] [blame] | 1469 | if (CurVariant == -1) |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1470 | OS << '}'; // this is gcc's behavior for } outside a variant |
Dale Johannesen | 8b1e054 | 2008-10-10 21:04:42 +0000 | [diff] [blame] | 1471 | else |
| 1472 | CurVariant = -1; |
Chris Lattner | faf1dae | 2006-10-03 23:27:09 +0000 | [diff] [blame] | 1473 | break; |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1474 | } |
Chris Lattner | faf1dae | 2006-10-03 23:27:09 +0000 | [diff] [blame] | 1475 | if (Done) break; |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1476 | |
| 1477 | bool HasCurlyBraces = false; |
| 1478 | if (*LastEmitted == '{') { // ${variable} |
| 1479 | ++LastEmitted; // Consume '{' character. |
| 1480 | HasCurlyBraces = true; |
| 1481 | } |
| 1482 | |
Chris Lattner | 3e0cc26 | 2009-03-10 05:37:13 +0000 | [diff] [blame] | 1483 | // If we have ${:foo}, then this is not a real operand reference, it is a |
| 1484 | // "magic" string reference, just like in .td files. Arrange to call |
| 1485 | // PrintSpecial. |
| 1486 | if (HasCurlyBraces && *LastEmitted == ':') { |
| 1487 | ++LastEmitted; |
| 1488 | const char *StrStart = LastEmitted; |
| 1489 | const char *StrEnd = strchr(StrStart, '}'); |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1490 | if (StrEnd == 0) |
| 1491 | llvm_report_error(Twine("Unterminated ${:foo} operand in inline asm" |
Chris Lattner | e1783ca | 2010-04-04 05:08:10 +0000 | [diff] [blame] | 1492 | " string: '") + Twine(AsmStr) + "'"); |
Chris Lattner | 3e0cc26 | 2009-03-10 05:37:13 +0000 | [diff] [blame] | 1493 | |
| 1494 | std::string Val(StrStart, StrEnd); |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1495 | PrintSpecial(MI, OS, Val.c_str()); |
Chris Lattner | 3e0cc26 | 2009-03-10 05:37:13 +0000 | [diff] [blame] | 1496 | LastEmitted = StrEnd+1; |
| 1497 | break; |
| 1498 | } |
| 1499 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1500 | const char *IDStart = LastEmitted; |
| 1501 | char *IDEnd; |
Chris Lattner | fad2912 | 2007-01-23 00:36:17 +0000 | [diff] [blame] | 1502 | errno = 0; |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1503 | long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs. |
| 1504 | if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1505 | llvm_report_error("Bad $ operand number in inline asm string: '" |
| 1506 | + std::string(AsmStr) + "'"); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1507 | } |
| 1508 | LastEmitted = IDEnd; |
| 1509 | |
Chris Lattner | a36cb0a | 2006-02-06 22:17:23 +0000 | [diff] [blame] | 1510 | char Modifier[2] = { 0, 0 }; |
| 1511 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1512 | if (HasCurlyBraces) { |
Chris Lattner | a36cb0a | 2006-02-06 22:17:23 +0000 | [diff] [blame] | 1513 | // If we have curly braces, check for a modifier character. This |
| 1514 | // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm. |
| 1515 | if (*LastEmitted == ':') { |
| 1516 | ++LastEmitted; // Consume ':' character. |
| 1517 | if (*LastEmitted == 0) { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1518 | llvm_report_error("Bad ${:} expression in inline asm string: '" |
| 1519 | + std::string(AsmStr) + "'"); |
Chris Lattner | a36cb0a | 2006-02-06 22:17:23 +0000 | [diff] [blame] | 1520 | } |
| 1521 | |
| 1522 | Modifier[0] = *LastEmitted; |
| 1523 | ++LastEmitted; // Consume modifier character. |
| 1524 | } |
| 1525 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1526 | if (*LastEmitted != '}') { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1527 | llvm_report_error("Bad ${} expression in inline asm string: '" |
| 1528 | + std::string(AsmStr) + "'"); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1529 | } |
| 1530 | ++LastEmitted; // Consume '}' character. |
| 1531 | } |
| 1532 | |
| 1533 | if ((unsigned)Val >= NumOperands-1) { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1534 | llvm_report_error("Invalid $ operand number in inline asm string: '" |
| 1535 | + std::string(AsmStr) + "'"); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1536 | } |
| 1537 | |
Chris Lattner | c3a9f8d | 2006-02-23 19:21:04 +0000 | [diff] [blame] | 1538 | // Okay, we finally have a value number. Ask the target to print this |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1539 | // operand! |
Chris Lattner | c3a9f8d | 2006-02-23 19:21:04 +0000 | [diff] [blame] | 1540 | if (CurVariant == -1 || CurVariant == AsmPrinterVariant) { |
| 1541 | unsigned OpNo = 1; |
Chris Lattner | fd561cd | 2006-06-08 18:00:47 +0000 | [diff] [blame] | 1542 | |
| 1543 | bool Error = false; |
| 1544 | |
Chris Lattner | c3a9f8d | 2006-02-23 19:21:04 +0000 | [diff] [blame] | 1545 | // Scan to find the machine operand number for the operand. |
Chris Lattner | daf6bc6 | 2006-02-24 19:50:58 +0000 | [diff] [blame] | 1546 | for (; Val; --Val) { |
Chris Lattner | fd561cd | 2006-06-08 18:00:47 +0000 | [diff] [blame] | 1547 | if (OpNo >= MI->getNumOperands()) break; |
Chris Lattner | 9e33049 | 2007-12-30 20:50:28 +0000 | [diff] [blame] | 1548 | unsigned OpFlags = MI->getOperand(OpNo).getImm(); |
Evan Cheng | 697cbbf | 2009-03-20 18:03:34 +0000 | [diff] [blame] | 1549 | OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1; |
Chris Lattner | daf6bc6 | 2006-02-24 19:50:58 +0000 | [diff] [blame] | 1550 | } |
Chris Lattner | dd26033 | 2006-02-24 20:21:58 +0000 | [diff] [blame] | 1551 | |
Chris Lattner | fd561cd | 2006-06-08 18:00:47 +0000 | [diff] [blame] | 1552 | if (OpNo >= MI->getNumOperands()) { |
| 1553 | Error = true; |
Chris Lattner | dd26033 | 2006-02-24 20:21:58 +0000 | [diff] [blame] | 1554 | } else { |
Chris Lattner | 9e33049 | 2007-12-30 20:50:28 +0000 | [diff] [blame] | 1555 | unsigned OpFlags = MI->getOperand(OpNo).getImm(); |
Chris Lattner | fd561cd | 2006-06-08 18:00:47 +0000 | [diff] [blame] | 1556 | ++OpNo; // Skip over the ID number. |
| 1557 | |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 1558 | if (Modifier[0] == 'l') // labels are target independent |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1559 | OS << *MI->getOperand(OpNo).getMBB()->getSymbol(); |
Dale Johannesen | eb57ea7 | 2007-11-05 21:20:28 +0000 | [diff] [blame] | 1560 | else { |
| 1561 | AsmPrinter *AP = const_cast<AsmPrinter*>(this); |
Dale Johannesen | 86b49f8 | 2008-09-24 01:07:17 +0000 | [diff] [blame] | 1562 | if ((OpFlags & 7) == 4) { |
Dale Johannesen | eb57ea7 | 2007-11-05 21:20:28 +0000 | [diff] [blame] | 1563 | Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant, |
Chris Lattner | c75c028 | 2010-04-04 05:29:35 +0000 | [diff] [blame] | 1564 | Modifier[0] ? Modifier : 0, |
| 1565 | OS); |
Dale Johannesen | eb57ea7 | 2007-11-05 21:20:28 +0000 | [diff] [blame] | 1566 | } else { |
| 1567 | Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant, |
Chris Lattner | c75c028 | 2010-04-04 05:29:35 +0000 | [diff] [blame] | 1568 | Modifier[0] ? Modifier : 0, OS); |
Dale Johannesen | eb57ea7 | 2007-11-05 21:20:28 +0000 | [diff] [blame] | 1569 | } |
Chris Lattner | fd561cd | 2006-06-08 18:00:47 +0000 | [diff] [blame] | 1570 | } |
Chris Lattner | dd26033 | 2006-02-24 20:21:58 +0000 | [diff] [blame] | 1571 | } |
| 1572 | if (Error) { |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1573 | std::string msg; |
| 1574 | raw_string_ostream Msg(msg); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 1575 | Msg << "Invalid operand found in inline asm: '" << AsmStr << "'\n"; |
Torok Edwin | 7d696d8 | 2009-07-11 13:10:19 +0000 | [diff] [blame] | 1576 | MI->print(Msg); |
| 1577 | llvm_report_error(Msg.str()); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1578 | } |
Chris Lattner | c3a9f8d | 2006-02-23 19:21:04 +0000 | [diff] [blame] | 1579 | } |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1580 | break; |
| 1581 | } |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1582 | } |
| 1583 | } |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1584 | OS << "\n"; |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1585 | |
Chris Lattner | c1e0b76 | 2010-04-04 05:07:45 +0000 | [diff] [blame] | 1586 | EmitInlineAsm(OS.str()); |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1587 | |
| 1588 | // Emit the #NOAPP end marker. This has to happen even if verbose-asm isn't |
| 1589 | // enabled, so we use EmitRawText. |
| 1590 | if (OutStreamer.hasRawTextSupport()) |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1591 | OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+ |
Chris Lattner | f94f8dc | 2010-04-03 22:01:50 +0000 | [diff] [blame] | 1592 | MAI->getInlineAsmEnd()); |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1593 | } |
| 1594 | |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 1595 | /// printImplicitDef - This method prints the specified machine instruction |
| 1596 | /// that is an implicit def. |
| 1597 | void AsmPrinter::printImplicitDef(const MachineInstr *MI) const { |
Chris Lattner | c5ea263 | 2009-09-09 23:14:36 +0000 | [diff] [blame] | 1598 | if (!VerboseAsm) return; |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1599 | OutStreamer.AddComment(Twine("implicit-def: ") + |
| 1600 | TRI->getName(MI->getOperand(0).getReg())); |
Chris Lattner | 8e089a9 | 2010-02-10 00:36:00 +0000 | [diff] [blame] | 1601 | OutStreamer.AddBlankLine(); |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 1602 | } |
| 1603 | |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1604 | void AsmPrinter::printKill(const MachineInstr *MI) const { |
| 1605 | if (!VerboseAsm) return; |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1606 | |
| 1607 | std::string Str = "kill:"; |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1608 | for (unsigned n = 0, e = MI->getNumOperands(); n != e; ++n) { |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1609 | const MachineOperand &Op = MI->getOperand(n); |
| 1610 | assert(Op.isReg() && "KILL instruction must have only register operands"); |
| 1611 | Str += ' '; |
| 1612 | Str += TRI->getName(Op.getReg()); |
| 1613 | Str += (Op.isDef() ? "<def>" : "<kill>"); |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1614 | } |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1615 | OutStreamer.AddComment(Str); |
Chris Lattner | 8e089a9 | 2010-02-10 00:36:00 +0000 | [diff] [blame] | 1616 | OutStreamer.AddBlankLine(); |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1617 | } |
| 1618 | |
Jim Laskey | 1ee2925 | 2007-01-26 14:34:52 +0000 | [diff] [blame] | 1619 | /// printLabel - This method prints a local label used by debug and |
| 1620 | /// exception handling tables. |
Chris Lattner | f64159c84 | 2010-02-03 01:46:05 +0000 | [diff] [blame] | 1621 | void AsmPrinter::printLabelInst(const MachineInstr *MI) const { |
Chris Lattner | 6ffccca | 2010-03-14 07:56:48 +0000 | [diff] [blame] | 1622 | OutStreamer.EmitLabel(MI->getOperand(0).getMCSymbol()); |
Jim Laskey | 1ee2925 | 2007-01-26 14:34:52 +0000 | [diff] [blame] | 1623 | } |
| 1624 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1625 | /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM |
| 1626 | /// instruction, using the specified assembler variant. Targets should |
Dale Johannesen | cf0b766 | 2010-01-14 21:50:17 +0000 | [diff] [blame] | 1627 | /// override this to format as appropriate. |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1628 | bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, |
Chris Lattner | c75c028 | 2010-04-04 05:29:35 +0000 | [diff] [blame] | 1629 | unsigned AsmVariant, const char *ExtraCode, |
| 1630 | raw_ostream &O) { |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1631 | // Target doesn't support this yet! |
| 1632 | return true; |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1633 | } |
Chris Lattner | dd26033 | 2006-02-24 20:21:58 +0000 | [diff] [blame] | 1634 | |
| 1635 | bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo, |
| 1636 | unsigned AsmVariant, |
Chris Lattner | c75c028 | 2010-04-04 05:29:35 +0000 | [diff] [blame] | 1637 | const char *ExtraCode, raw_ostream &O) { |
Chris Lattner | dd26033 | 2006-02-24 20:21:58 +0000 | [diff] [blame] | 1638 | // Target doesn't support this yet! |
| 1639 | return true; |
| 1640 | } |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1641 | |
Chris Lattner | 9517554 | 2010-02-08 23:10:08 +0000 | [diff] [blame] | 1642 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const { |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1643 | return MMI->getAddrLabelSymbol(BA->getBasicBlock()); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1644 | } |
| 1645 | |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1646 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const { |
| 1647 | return MMI->getAddrLabelSymbol(BB); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1648 | } |
| 1649 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1650 | /// GetCPISymbol - Return the symbol for the specified constant pool entry. |
| 1651 | MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1652 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1653 | (Twine(MAI->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber()) |
| 1654 | + "_" + Twine(CPID)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1655 | } |
| 1656 | |
| 1657 | /// GetJTISymbol - Return the symbol for the specified jump table entry. |
| 1658 | MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const { |
Chris Lattner | 589c6f6 | 2010-01-26 06:28:43 +0000 | [diff] [blame] | 1659 | return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate); |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1660 | } |
| 1661 | |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1662 | /// GetJTSetSymbol - Return the symbol for the specified jump table .set |
| 1663 | /// FIXME: privatize to AsmPrinter. |
| 1664 | MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1665 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1666 | (Twine(MAI->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" + |
| 1667 | Twine(UID) + "_set_" + Twine(MBBID)); |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1668 | } |
| 1669 | |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1670 | /// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1671 | /// 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] | 1672 | /// symbol is forced to have private linkage if ForcePrivate is true. |
| 1673 | MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV, |
| 1674 | StringRef Suffix, |
| 1675 | bool ForcePrivate) const { |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1676 | SmallString<60> NameStr; |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1677 | Mang->getNameWithPrefix(NameStr, GV, ForcePrivate); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1678 | NameStr.append(Suffix.begin(), Suffix.end()); |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1679 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1680 | } |
| 1681 | |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1682 | /// GetExternalSymbolSymbol - Return the MCSymbol for the specified |
| 1683 | /// ExternalSymbol. |
| 1684 | MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const { |
| 1685 | SmallString<60> NameStr; |
| 1686 | Mang->getNameWithPrefix(NameStr, Sym); |
| 1687 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
| 1688 | } |
| 1689 | |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1690 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1691 | |
| 1692 | /// PrintParentLoopComment - Print comments about parent loops of this one. |
| 1693 | static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1694 | unsigned FunctionNumber) { |
| 1695 | if (Loop == 0) return; |
| 1696 | PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber); |
| 1697 | OS.indent(Loop->getLoopDepth()*2) |
| 1698 | << "Parent Loop BB" << FunctionNumber << "_" |
| 1699 | << Loop->getHeader()->getNumber() |
| 1700 | << " Depth=" << Loop->getLoopDepth() << '\n'; |
| 1701 | } |
| 1702 | |
| 1703 | |
| 1704 | /// PrintChildLoopComment - Print comments about child loops within |
| 1705 | /// the loop for this basic block, with nesting. |
| 1706 | static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1707 | unsigned FunctionNumber) { |
| 1708 | // Add child loop information |
| 1709 | for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){ |
| 1710 | OS.indent((*CL)->getLoopDepth()*2) |
| 1711 | << "Child Loop BB" << FunctionNumber << "_" |
| 1712 | << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth() |
| 1713 | << '\n'; |
| 1714 | PrintChildLoopComment(OS, *CL, FunctionNumber); |
| 1715 | } |
| 1716 | } |
| 1717 | |
Chris Lattner | d1ff72b | 2010-02-03 01:09:55 +0000 | [diff] [blame] | 1718 | /// PrintBasicBlockLoopComments - Pretty-print comments for basic blocks. |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1719 | static void PrintBasicBlockLoopComments(const MachineBasicBlock &MBB, |
| 1720 | const MachineLoopInfo *LI, |
| 1721 | const AsmPrinter &AP) { |
| 1722 | // Add loop depth information |
| 1723 | const MachineLoop *Loop = LI->getLoopFor(&MBB); |
| 1724 | if (Loop == 0) return; |
| 1725 | |
| 1726 | MachineBasicBlock *Header = Loop->getHeader(); |
| 1727 | assert(Header && "No header for loop"); |
| 1728 | |
| 1729 | // If this block is not a loop header, just print out what is the loop header |
| 1730 | // and return. |
| 1731 | if (Header != &MBB) { |
| 1732 | AP.OutStreamer.AddComment(" in Loop: Header=BB" + |
| 1733 | Twine(AP.getFunctionNumber())+"_" + |
| 1734 | Twine(Loop->getHeader()->getNumber())+ |
| 1735 | " Depth="+Twine(Loop->getLoopDepth())); |
| 1736 | return; |
| 1737 | } |
| 1738 | |
| 1739 | // Otherwise, it is a loop header. Print out information about child and |
| 1740 | // parent loops. |
| 1741 | raw_ostream &OS = AP.OutStreamer.GetCommentOS(); |
| 1742 | |
| 1743 | PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber()); |
| 1744 | |
| 1745 | OS << "=>"; |
| 1746 | OS.indent(Loop->getLoopDepth()*2-2); |
| 1747 | |
| 1748 | OS << "This "; |
| 1749 | if (Loop->empty()) |
| 1750 | OS << "Inner "; |
| 1751 | OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n'; |
| 1752 | |
| 1753 | PrintChildLoopComment(OS, Loop, AP.getFunctionNumber()); |
| 1754 | } |
| 1755 | |
| 1756 | |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1757 | /// EmitBasicBlockStart - This method prints the label for the specified |
| 1758 | /// MachineBasicBlock, an alignment (if present) and a comment describing |
| 1759 | /// it if appropriate. |
Chris Lattner | 662316c | 2009-09-14 03:15:54 +0000 | [diff] [blame] | 1760 | void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const { |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1761 | // Emit an alignment directive for this block, if needed. |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1762 | if (unsigned Align = MBB->getAlignment()) |
| 1763 | EmitAlignment(Log2_32(Align)); |
Evan Cheng | fb8075d | 2008-02-28 00:43:03 +0000 | [diff] [blame] | 1764 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1765 | // If the block has its address taken, emit any labels that were used to |
| 1766 | // reference the block. It is possible that there is more than one label |
| 1767 | // here, because multiple LLVM BB's may have been RAUW'd to this block after |
| 1768 | // the references were generated. |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1769 | if (MBB->hasAddressTaken()) { |
Chris Lattner | 213168b | 2010-01-20 07:24:05 +0000 | [diff] [blame] | 1770 | const BasicBlock *BB = MBB->getBasicBlock(); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1771 | if (VerboseAsm) |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1772 | OutStreamer.AddComment("Block address taken"); |
| 1773 | |
| 1774 | std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB); |
| 1775 | |
| 1776 | for (unsigned i = 0, e = Syms.size(); i != e; ++i) |
| 1777 | OutStreamer.EmitLabel(Syms[i]); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1778 | } |
| 1779 | |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1780 | // Print the main label for the block. |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1781 | if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) { |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1782 | if (VerboseAsm && OutStreamer.hasRawTextSupport()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1783 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1784 | if (BB->hasName()) |
| 1785 | OutStreamer.AddComment("%" + BB->getName()); |
Chris Lattner | d8d0aee | 2010-01-22 21:00:45 +0000 | [diff] [blame] | 1786 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1787 | PrintBasicBlockLoopComments(*MBB, LI, *this); |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1788 | |
| 1789 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
| 1790 | OutStreamer.EmitRawText(Twine(MAI->getCommentString()) + " BB#" + |
| 1791 | Twine(MBB->getNumber()) + ":"); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1792 | } |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1793 | } else { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1794 | if (VerboseAsm) { |
| 1795 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1796 | if (BB->hasName()) |
| 1797 | OutStreamer.AddComment("%" + BB->getName()); |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1798 | PrintBasicBlockLoopComments(*MBB, LI, *this); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1799 | } |
Chris Lattner | d8d0aee | 2010-01-22 21:00:45 +0000 | [diff] [blame] | 1800 | |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1801 | OutStreamer.EmitLabel(MBB->getSymbol()); |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1802 | } |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1803 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 1804 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 1805 | void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility) const { |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1806 | MCSymbolAttr Attr = MCSA_Invalid; |
| 1807 | |
| 1808 | switch (Visibility) { |
| 1809 | default: break; |
| 1810 | case GlobalValue::HiddenVisibility: |
| 1811 | Attr = MAI->getHiddenVisibilityAttr(); |
| 1812 | break; |
| 1813 | case GlobalValue::ProtectedVisibility: |
| 1814 | Attr = MAI->getProtectedVisibilityAttr(); |
| 1815 | break; |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 1816 | } |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1817 | |
| 1818 | if (Attr != MCSA_Invalid) |
| 1819 | OutStreamer.EmitSymbolAttribute(Sym, Attr); |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 1820 | } |
| 1821 | |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 1822 | void AsmPrinter::printOffset(int64_t Offset, raw_ostream &OS) const { |
Anton Korobeynikov | 7751ad9 | 2008-11-22 16:15:34 +0000 | [diff] [blame] | 1823 | if (Offset > 0) |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 1824 | OS << '+' << Offset; |
Anton Korobeynikov | 7751ad9 | 2008-11-22 16:15:34 +0000 | [diff] [blame] | 1825 | else if (Offset < 0) |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 1826 | OS << Offset; |
Anton Korobeynikov | 7751ad9 | 2008-11-22 16:15:34 +0000 | [diff] [blame] | 1827 | } |
| 1828 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1829 | /// isBlockOnlyReachableByFallthough - Return true if the basic block has |
| 1830 | /// exactly one predecessor and the control transfer mechanism between |
| 1831 | /// the predecessor and this block is a fall-through. |
| 1832 | bool AsmPrinter::isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) |
| 1833 | const { |
| 1834 | // If this is a landing pad, it isn't a fall through. If it has no preds, |
| 1835 | // then nothing falls through to it. |
| 1836 | if (MBB->isLandingPad() || MBB->pred_empty()) |
| 1837 | return false; |
| 1838 | |
| 1839 | // If there isn't exactly one predecessor, it can't be a fall through. |
| 1840 | MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI; |
| 1841 | ++PI2; |
| 1842 | if (PI2 != MBB->pred_end()) |
| 1843 | return false; |
| 1844 | |
| 1845 | // The predecessor has to be immediately before this block. |
| 1846 | const MachineBasicBlock *Pred = *PI; |
| 1847 | |
| 1848 | if (!Pred->isLayoutSuccessor(MBB)) |
| 1849 | return false; |
| 1850 | |
| 1851 | // If the block is completely empty, then it definitely does fall through. |
| 1852 | if (Pred->empty()) |
| 1853 | return true; |
| 1854 | |
| 1855 | // Otherwise, check the last instruction. |
| 1856 | const MachineInstr &LastInst = Pred->back(); |
| 1857 | return !LastInst.getDesc().isBarrier(); |
| 1858 | } |
| 1859 | |
| 1860 | |
| 1861 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1862 | GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) { |
| 1863 | if (!S->usesMetadata()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1864 | return 0; |
| 1865 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1866 | gcp_iterator GCPI = GCMetadataPrinters.find(S); |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1867 | if (GCPI != GCMetadataPrinters.end()) |
| 1868 | return GCPI->second; |
| 1869 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1870 | const char *Name = S->getName().c_str(); |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1871 | |
| 1872 | for (GCMetadataPrinterRegistry::iterator |
| 1873 | I = GCMetadataPrinterRegistry::begin(), |
| 1874 | E = GCMetadataPrinterRegistry::end(); I != E; ++I) |
| 1875 | if (strcmp(Name, I->getName()) == 0) { |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1876 | GCMetadataPrinter *GMP = I->instantiate(); |
| 1877 | GMP->S = S; |
| 1878 | GCMetadataPrinters.insert(std::make_pair(S, GMP)); |
| 1879 | return GMP; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1880 | } |
| 1881 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1882 | llvm_report_error("no GCMetadataPrinter registered for GC: " + Twine(Name)); |
| 1883 | return 0; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1884 | } |
David Greene | 014700c | 2009-07-13 20:25:48 +0000 | [diff] [blame] | 1885 | |