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" |
Chris Lattner | 450de39 | 2005-11-10 18:36:17 +0000 | [diff] [blame] | 16 | #include "llvm/Module.h" |
Chris Lattner | 45111d1 | 2010-01-16 21:57:06 +0000 | [diff] [blame] | 17 | #include "llvm/CodeGen/DwarfWriter.h" |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 18 | #include "llvm/CodeGen/GCMetadataPrinter.h" |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 19 | #include "llvm/CodeGen/MachineConstantPool.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 20 | #include "llvm/CodeGen/MachineFrameInfo.h" |
David Greene | fe37ab3 | 2009-08-18 19:22:55 +0000 | [diff] [blame] | 21 | #include "llvm/CodeGen/MachineFunction.h" |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 22 | #include "llvm/CodeGen/MachineJumpTableInfo.h" |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 23 | #include "llvm/CodeGen/MachineLoopInfo.h" |
Chris Lattner | 84bc542 | 2007-12-31 04:13:23 +0000 | [diff] [blame] | 24 | #include "llvm/CodeGen/MachineModuleInfo.h" |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 25 | #include "llvm/Analysis/ConstantFolding.h" |
Argyrios Kyrtzidis | cd76240 | 2009-05-07 13:55:51 +0000 | [diff] [blame] | 26 | #include "llvm/Analysis/DebugInfo.h" |
Chris Lattner | 736e31d | 2010-04-04 18:34:07 +0000 | [diff] [blame^] | 27 | #include "llvm/MC/MCAsmInfo.h" |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 28 | #include "llvm/MC/MCContext.h" |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 29 | #include "llvm/MC/MCExpr.h" |
David Greene | 3ac1ab8 | 2009-07-16 22:24:20 +0000 | [diff] [blame] | 30 | #include "llvm/MC/MCInst.h" |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 31 | #include "llvm/MC/MCSection.h" |
| 32 | #include "llvm/MC/MCStreamer.h" |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 33 | #include "llvm/MC/MCSymbol.h" |
Chris Lattner | 45111d1 | 2010-01-16 21:57:06 +0000 | [diff] [blame] | 34 | #include "llvm/Target/Mangler.h" |
Owen Anderson | 07000c6 | 2006-05-12 06:33:49 +0000 | [diff] [blame] | 35 | #include "llvm/Target/TargetData.h" |
David Greene | 1924aab | 2009-11-13 21:34:57 +0000 | [diff] [blame] | 36 | #include "llvm/Target/TargetInstrInfo.h" |
Chris Lattner | 0336fdb | 2006-10-06 22:50:56 +0000 | [diff] [blame] | 37 | #include "llvm/Target/TargetLowering.h" |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 38 | #include "llvm/Target/TargetLoweringObjectFile.h" |
Evan Cheng | 6547e40 | 2008-07-01 23:18:29 +0000 | [diff] [blame] | 39 | #include "llvm/Target/TargetOptions.h" |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 40 | #include "llvm/Target/TargetRegisterInfo.h" |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 41 | #include "llvm/ADT/SmallString.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 42 | #include "llvm/ADT/Statistic.h" |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 43 | #include "llvm/Support/ErrorHandling.h" |
| 44 | #include "llvm/Support/Format.h" |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 45 | using namespace llvm; |
| 46 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 47 | STATISTIC(EmittedInsts, "Number of machine instrs printed"); |
| 48 | |
Devang Patel | 1997473 | 2007-05-03 01:11:54 +0000 | [diff] [blame] | 49 | char AsmPrinter::ID = 0; |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 50 | |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 51 | typedef DenseMap<GCStrategy*,GCMetadataPrinter*> gcp_map_type; |
| 52 | static gcp_map_type &getGCMap(void *&P) { |
| 53 | if (P == 0) |
| 54 | P = new gcp_map_type(); |
| 55 | return *(gcp_map_type*)P; |
| 56 | } |
| 57 | |
| 58 | |
Chris Lattner | b23569a | 2010-04-04 08:18:47 +0000 | [diff] [blame] | 59 | AsmPrinter::AsmPrinter(TargetMachine &tm, MCStreamer &Streamer) |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 60 | : MachineFunctionPass(&ID), |
Chris Lattner | 9d1c1ad | 2010-04-04 18:06:11 +0000 | [diff] [blame] | 61 | TM(tm), MAI(tm.getMCAsmInfo()), |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 62 | OutContext(Streamer.getContext()), |
| 63 | OutStreamer(Streamer), |
Devang Patel | 553881b | 2010-03-29 17:20:31 +0000 | [diff] [blame] | 64 | LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) { |
Chris Lattner | 0de1fc4 | 2009-06-24 19:09:55 +0000 | [diff] [blame] | 65 | DW = 0; MMI = 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 66 | GCMetadataPrinters = 0; |
Chris Lattner | 56591ab | 2010-02-02 23:37:42 +0000 | [diff] [blame] | 67 | VerboseAsm = Streamer.isVerboseAsm(); |
Evan Cheng | 42bf74b | 2009-03-25 01:47:28 +0000 | [diff] [blame] | 68 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 69 | |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 70 | AsmPrinter::~AsmPrinter() { |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 71 | if (GCMetadataPrinters != 0) { |
| 72 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
| 73 | |
| 74 | for (gcp_map_type::iterator I = GCMap.begin(), E = GCMap.end(); I != E; ++I) |
| 75 | delete I->second; |
| 76 | delete &GCMap; |
| 77 | GCMetadataPrinters = 0; |
| 78 | } |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 79 | |
| 80 | delete &OutStreamer; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 81 | } |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 82 | |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 83 | /// getFunctionNumber - Return a unique ID for the current function. |
| 84 | /// |
| 85 | unsigned AsmPrinter::getFunctionNumber() const { |
| 86 | return MF->getFunctionNumber(); |
| 87 | } |
| 88 | |
Chris Lattner | 38c3988 | 2009-08-03 19:12:26 +0000 | [diff] [blame] | 89 | TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const { |
Chris Lattner | f014412 | 2009-07-28 03:13:23 +0000 | [diff] [blame] | 90 | return TM.getTargetLowering()->getObjFileLowering(); |
| 91 | } |
| 92 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 93 | /// getCurrentSection() - Return the current section we are emitting to. |
| 94 | const MCSection *AsmPrinter::getCurrentSection() const { |
| 95 | return OutStreamer.getCurrentSection(); |
| 96 | } |
| 97 | |
| 98 | |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 99 | void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const { |
Dan Gohman | 845012e | 2009-07-31 23:37:33 +0000 | [diff] [blame] | 100 | AU.setPreservesAll(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 101 | MachineFunctionPass::getAnalysisUsage(AU); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 102 | AU.addRequired<MachineModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 103 | AU.addRequired<GCModuleInfo>(); |
David Greene | fe37ab3 | 2009-08-18 19:22:55 +0000 | [diff] [blame] | 104 | if (VerboseAsm) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 105 | AU.addRequired<MachineLoopInfo>(); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 106 | } |
| 107 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 108 | bool AsmPrinter::doInitialization(Module &M) { |
Chris Lattner | d32c8a5 | 2010-04-04 05:09:10 +0000 | [diff] [blame] | 109 | MMI = getAnalysisIfAvailable<MachineModuleInfo>(); |
Chris Lattner | 11d53c1 | 2010-03-13 20:55:24 +0000 | [diff] [blame] | 110 | MMI->AnalyzeModule(M); |
| 111 | |
Chris Lattner | f26e03b | 2009-07-31 17:42:42 +0000 | [diff] [blame] | 112 | // Initialize TargetLoweringObjectFile. |
| 113 | const_cast<TargetLoweringObjectFile&>(getObjFileLowering()) |
| 114 | .Initialize(OutContext, TM); |
| 115 | |
Chris Lattner | b87c305 | 2010-03-12 20:47:28 +0000 | [diff] [blame] | 116 | Mang = new Mangler(OutContext, *TM.getTargetData()); |
Chris Lattner | 2c1b159 | 2006-01-23 23:47:53 +0000 | [diff] [blame] | 117 | |
Bob Wilson | 812209a | 2009-09-30 22:06:26 +0000 | [diff] [blame] | 118 | // Allow the target to emit any magic that it wants at the start of the file. |
| 119 | EmitStartOfAsmFile(M); |
Rafael Espindola | 952b839 | 2008-12-03 11:01:37 +0000 | [diff] [blame] | 120 | |
Chris Lattner | a6594fc | 2010-01-25 18:58:59 +0000 | [diff] [blame] | 121 | // Very minimal debug info. It is ignored if we emit actual debug info. If we |
| 122 | // 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] | 123 | if (MAI->hasSingleParameterDotFile()) { |
Chris Lattner | a6594fc | 2010-01-25 18:58:59 +0000 | [diff] [blame] | 124 | // .file "foo.c" |
| 125 | OutStreamer.EmitFileDirective(M.getModuleIdentifier()); |
Rafael Espindola | 952b839 | 2008-12-03 11:01:37 +0000 | [diff] [blame] | 126 | } |
| 127 | |
Bob Wilson | 812209a | 2009-09-30 22:06:26 +0000 | [diff] [blame] | 128 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
| 129 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 130 | for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I) |
| 131 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 132 | MP->beginAssembly(*this); |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 133 | |
| 134 | // Emit module-level inline asm if it exists. |
Chris Lattner | 47b7e5d | 2010-04-03 21:13:18 +0000 | [diff] [blame] | 135 | if (!M.getModuleInlineAsm().empty()) { |
| 136 | OutStreamer.AddComment("Start of file scope inline assembly"); |
| 137 | OutStreamer.AddBlankLine(); |
Chris Lattner | 91bead7 | 2010-04-03 21:35:55 +0000 | [diff] [blame] | 138 | EmitInlineAsm(M.getModuleInlineAsm()); |
Chris Lattner | 47b7e5d | 2010-04-03 21:13:18 +0000 | [diff] [blame] | 139 | OutStreamer.AddComment("End of file scope inline assembly"); |
| 140 | OutStreamer.AddBlankLine(); |
| 141 | } |
Chris Lattner | 2c1b159 | 2006-01-23 23:47:53 +0000 | [diff] [blame] | 142 | |
Chris Lattner | b55e068 | 2009-09-24 05:44:53 +0000 | [diff] [blame] | 143 | DW = getAnalysisIfAvailable<DwarfWriter>(); |
Sanjiv Gupta | 9a501cf | 2009-11-14 07:22:25 +0000 | [diff] [blame] | 144 | if (DW) |
Chris Lattner | 75f5072 | 2010-04-04 07:48:20 +0000 | [diff] [blame] | 145 | DW->BeginModule(&M, this); |
Devang Patel | 14a55d9 | 2009-06-19 21:54:26 +0000 | [diff] [blame] | 146 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 147 | return false; |
| 148 | } |
| 149 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 150 | void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const { |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 151 | switch ((GlobalValue::LinkageTypes)Linkage) { |
| 152 | case GlobalValue::CommonLinkage: |
| 153 | case GlobalValue::LinkOnceAnyLinkage: |
| 154 | case GlobalValue::LinkOnceODRLinkage: |
| 155 | case GlobalValue::WeakAnyLinkage: |
| 156 | case GlobalValue::WeakODRLinkage: |
| 157 | case GlobalValue::LinkerPrivateLinkage: |
| 158 | if (MAI->getWeakDefDirective() != 0) { |
| 159 | // .globl _foo |
| 160 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 161 | // .weak_definition _foo |
| 162 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition); |
| 163 | } else if (const char *LinkOnce = MAI->getLinkOnceDirective()) { |
| 164 | // .globl _foo |
| 165 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 166 | // FIXME: linkonce should be a section attribute, handled by COFF Section |
| 167 | // assignment. |
| 168 | // http://sourceware.org/binutils/docs-2.20/as/Linkonce.html#Linkonce |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 169 | // .linkonce discard |
| 170 | // FIXME: It would be nice to use .linkonce samesize for non-common |
| 171 | // globals. |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 172 | OutStreamer.EmitRawText(StringRef(LinkOnce)); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 173 | } else { |
| 174 | // .weak _foo |
| 175 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak); |
| 176 | } |
| 177 | break; |
| 178 | case GlobalValue::DLLExportLinkage: |
| 179 | case GlobalValue::AppendingLinkage: |
| 180 | // FIXME: appending linkage variables should go into a section of |
| 181 | // their name or something. For now, just emit them as external. |
| 182 | case GlobalValue::ExternalLinkage: |
| 183 | // If external or appending, declare as a global symbol. |
| 184 | // .globl _foo |
| 185 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
| 186 | break; |
| 187 | case GlobalValue::PrivateLinkage: |
| 188 | case GlobalValue::InternalLinkage: |
| 189 | break; |
| 190 | default: |
| 191 | llvm_unreachable("Unknown linkage type!"); |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 196 | /// EmitGlobalVariable - Emit the specified global variable to the .s file. |
| 197 | void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) { |
| 198 | if (!GV->hasInitializer()) // External globals require no code. |
| 199 | return; |
| 200 | |
| 201 | // Check to see if this is a special global used by LLVM, if so, emit it. |
| 202 | if (EmitSpecialLLVMGlobal(GV)) |
| 203 | return; |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 204 | |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 205 | MCSymbol *GVSym = Mang->getSymbol(GV); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 206 | EmitVisibility(GVSym, GV->getVisibility()); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 207 | |
Chris Lattner | a800f7c | 2010-01-25 18:33:40 +0000 | [diff] [blame] | 208 | if (MAI->hasDotTypeDotSizeDirective()) |
| 209 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 210 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 211 | SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM); |
| 212 | |
| 213 | const TargetData *TD = TM.getTargetData(); |
| 214 | unsigned Size = TD->getTypeAllocSize(GV->getType()->getElementType()); |
| 215 | unsigned AlignLog = TD->getPreferredAlignmentLog(GV); |
| 216 | |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 217 | // Handle common and BSS local symbols (.lcomm). |
| 218 | if (GVKind.isCommon() || GVKind.isBSSLocal()) { |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 219 | if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
| 220 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 221 | if (VerboseAsm) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 222 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 223 | /*PrintType=*/false, GV->getParent()); |
| 224 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 225 | } |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 226 | |
| 227 | // Handle common symbols. |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 228 | if (GVKind.isCommon()) { |
| 229 | // .comm _foo, 42, 4 |
Chris Lattner | 4ed5438 | 2010-01-19 06:01:04 +0000 | [diff] [blame] | 230 | OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 231 | return; |
Chris Lattner | 9744d61 | 2010-01-19 05:51:42 +0000 | [diff] [blame] | 232 | } |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 233 | |
| 234 | // Handle local BSS symbols. |
| 235 | if (MAI->hasMachoZeroFillDirective()) { |
| 236 | const MCSection *TheSection = |
| 237 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 238 | // .zerofill __DATA, __bss, _foo, 400, 5 |
| 239 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 240 | return; |
| 241 | } |
| 242 | |
Chris Lattner | 9eb158d | 2010-01-23 07:47:02 +0000 | [diff] [blame] | 243 | if (MAI->hasLCOMMDirective()) { |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 244 | // .lcomm _foo, 42 |
Chris Lattner | 9eb158d | 2010-01-23 07:47:02 +0000 | [diff] [blame] | 245 | OutStreamer.EmitLocalCommonSymbol(GVSym, Size); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 246 | return; |
| 247 | } |
| 248 | |
| 249 | // .local _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 250 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local); |
Chris Lattner | 814819f | 2010-01-19 06:25:51 +0000 | [diff] [blame] | 251 | // .comm _foo, 42, 4 |
| 252 | OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 253 | return; |
| 254 | } |
| 255 | |
| 256 | const MCSection *TheSection = |
| 257 | getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM); |
| 258 | |
| 259 | // Handle the zerofill directive on darwin, which is a special form of BSS |
| 260 | // emission. |
| 261 | if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) { |
| 262 | // .globl _foo |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 263 | OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 264 | // .zerofill __DATA, __common, _foo, 400, 5 |
| 265 | OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog); |
| 266 | return; |
| 267 | } |
| 268 | |
| 269 | OutStreamer.SwitchSection(TheSection); |
| 270 | |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 271 | EmitLinkage(GV->getLinkage(), GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 272 | EmitAlignment(AlignLog, GV); |
Chris Lattner | a3e8883 | 2010-01-26 23:47:12 +0000 | [diff] [blame] | 273 | |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 274 | if (VerboseAsm) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 275 | WriteAsOperand(OutStreamer.GetCommentOS(), GV, |
| 276 | /*PrintType=*/false, GV->getParent()); |
| 277 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 278 | } |
Chris Lattner | 4c8c668 | 2010-01-19 06:41:24 +0000 | [diff] [blame] | 279 | OutStreamer.EmitLabel(GVSym); |
Chris Lattner | 74bfe21 | 2010-01-19 05:38:33 +0000 | [diff] [blame] | 280 | |
| 281 | EmitGlobalConstant(GV->getInitializer()); |
| 282 | |
| 283 | if (MAI->hasDotTypeDotSizeDirective()) |
Chris Lattner | 1947f24 | 2010-01-25 07:53:05 +0000 | [diff] [blame] | 284 | // .size foo, 42 |
Chris Lattner | 99328ad | 2010-01-25 07:52:13 +0000 | [diff] [blame] | 285 | OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext)); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 286 | |
| 287 | OutStreamer.AddBlankLine(); |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 288 | } |
| 289 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 290 | /// EmitFunctionHeader - This method emits the header for the current |
| 291 | /// function. |
| 292 | void AsmPrinter::EmitFunctionHeader() { |
| 293 | // Print out constants referenced by the function |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 294 | EmitConstantPool(); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 295 | |
| 296 | // Print the 'header' of function. |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 297 | const Function *F = MF->getFunction(); |
| 298 | |
| 299 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM)); |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 300 | EmitVisibility(CurrentFnSym, F->getVisibility()); |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 301 | |
Chris Lattner | 111a319 | 2010-01-26 23:51:52 +0000 | [diff] [blame] | 302 | EmitLinkage(F->getLinkage(), CurrentFnSym); |
Chris Lattner | b406a81 | 2010-01-26 23:41:48 +0000 | [diff] [blame] | 303 | EmitAlignment(MF->getAlignment(), F); |
| 304 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 305 | if (MAI->hasDotTypeDotSizeDirective()) |
| 306 | OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction); |
| 307 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 308 | if (VerboseAsm) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 309 | WriteAsOperand(OutStreamer.GetCommentOS(), F, |
| 310 | /*PrintType=*/false, F->getParent()); |
| 311 | OutStreamer.GetCommentOS() << '\n'; |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 312 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 313 | |
Dan Gohman | f451cb8 | 2010-02-10 16:03:48 +0000 | [diff] [blame] | 314 | // Emit the CurrentFnSym. This is a virtual function to allow targets to |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 315 | // do their wild and crazy things as required. |
| 316 | EmitFunctionEntryLabel(); |
| 317 | |
Chris Lattner | 9cc0da9 | 2010-03-15 20:39:00 +0000 | [diff] [blame] | 318 | // If the function had address-taken blocks that got deleted, then we have |
| 319 | // references to the dangling symbols. Emit them at the start of the function |
| 320 | // so that we don't get references to undefined symbols. |
| 321 | std::vector<MCSymbol*> DeadBlockSyms; |
| 322 | MMI->takeDeletedSymbolsForFunction(F, DeadBlockSyms); |
| 323 | for (unsigned i = 0, e = DeadBlockSyms.size(); i != e; ++i) { |
| 324 | OutStreamer.AddComment("Address taken block that was later removed"); |
| 325 | OutStreamer.EmitLabel(DeadBlockSyms[i]); |
| 326 | } |
| 327 | |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 328 | // Add some workaround for linkonce linkage on Cygwin\MinGW. |
| 329 | if (MAI->getLinkOnceDirective() != 0 && |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 330 | (F->hasLinkOnceLinkage() || F->hasWeakLinkage())) { |
Chris Lattner | 9bc20ab | 2010-01-26 23:53:39 +0000 | [diff] [blame] | 331 | // FIXME: What is this? |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 332 | MCSymbol *FakeStub = |
| 333 | OutContext.GetOrCreateSymbol(Twine("Lllvm$workaround$fake$stub$")+ |
| 334 | CurrentFnSym->getName()); |
| 335 | OutStreamer.EmitLabel(FakeStub); |
| 336 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 337 | |
| 338 | // Emit pre-function debug and/or EH information. |
| 339 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
| 340 | DW->BeginFunction(MF); |
| 341 | } |
| 342 | |
Chris Lattner | 2cf7251 | 2010-01-27 07:21:55 +0000 | [diff] [blame] | 343 | /// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the |
| 344 | /// function. This can be overridden by targets as required to do custom stuff. |
| 345 | void AsmPrinter::EmitFunctionEntryLabel() { |
| 346 | OutStreamer.EmitLabel(CurrentFnSym); |
| 347 | } |
Chris Lattner | b11caed | 2010-01-26 23:18:44 +0000 | [diff] [blame] | 348 | |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 349 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 350 | /// EmitComments - Pretty-print comments for instructions. |
| 351 | static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) { |
| 352 | const MachineFunction *MF = MI.getParent()->getParent(); |
| 353 | const TargetMachine &TM = MF->getTarget(); |
| 354 | |
Chris Lattner | de4845c | 2010-04-02 19:42:39 +0000 | [diff] [blame] | 355 | DebugLoc DL = MI.getDebugLoc(); |
| 356 | if (!DL.isUnknown()) { // Print source line info. |
| 357 | DIScope Scope(DL.getScope(MF->getFunction()->getContext())); |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 358 | // Omit the directory, because it's likely to be long and uninteresting. |
Devang Patel | 3c91b05 | 2010-03-08 20:52:55 +0000 | [diff] [blame] | 359 | if (Scope.Verify()) |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 360 | CommentOS << Scope.getFilename(); |
| 361 | else |
| 362 | CommentOS << "<unknown>"; |
Chris Lattner | de4845c | 2010-04-02 19:42:39 +0000 | [diff] [blame] | 363 | CommentOS << ':' << DL.getLine(); |
| 364 | if (DL.getCol() != 0) |
| 365 | CommentOS << ':' << DL.getCol(); |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 366 | CommentOS << '\n'; |
| 367 | } |
| 368 | |
| 369 | // Check for spills and reloads |
| 370 | int FI; |
| 371 | |
| 372 | const MachineFrameInfo *FrameInfo = MF->getFrameInfo(); |
| 373 | |
| 374 | // We assume a single instruction only has a spill or reload, not |
| 375 | // both. |
| 376 | const MachineMemOperand *MMO; |
| 377 | if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) { |
| 378 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 379 | MMO = *MI.memoperands_begin(); |
| 380 | CommentOS << MMO->getSize() << "-byte Reload\n"; |
| 381 | } |
| 382 | } else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) { |
| 383 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 384 | CommentOS << MMO->getSize() << "-byte Folded Reload\n"; |
| 385 | } else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) { |
| 386 | if (FrameInfo->isSpillSlotObjectIndex(FI)) { |
| 387 | MMO = *MI.memoperands_begin(); |
| 388 | CommentOS << MMO->getSize() << "-byte Spill\n"; |
| 389 | } |
| 390 | } else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) { |
| 391 | if (FrameInfo->isSpillSlotObjectIndex(FI)) |
| 392 | CommentOS << MMO->getSize() << "-byte Folded Spill\n"; |
| 393 | } |
| 394 | |
| 395 | // Check for spill-induced copies |
| 396 | unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx; |
| 397 | if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg, |
| 398 | SrcSubIdx, DstSubIdx)) { |
Chris Lattner | 45282ae | 2010-02-10 01:23:18 +0000 | [diff] [blame] | 399 | if (MI.getAsmPrinterFlag(MachineInstr::ReloadReuse)) |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 400 | CommentOS << " Reload Reuse\n"; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | |
| 405 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 406 | /// EmitFunctionBody - This method emits the body and trailer for a |
| 407 | /// function. |
| 408 | void AsmPrinter::EmitFunctionBody() { |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 409 | // Emit target-specific gunk before the function body. |
| 410 | EmitFunctionBodyStart(); |
| 411 | |
Chris Lattner | 2851995 | 2010-04-04 18:18:51 +0000 | [diff] [blame] | 412 | bool ShouldPrintDebugScopes = |
| 413 | DW && MAI->doesSupportDebugInformation() &&DW->ShouldEmitDwarfDebug(); |
| 414 | |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 415 | // Print out code for the function. |
| 416 | bool HasAnyRealCode = false; |
| 417 | for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); |
| 418 | I != E; ++I) { |
| 419 | // Print a label for the basic block. |
| 420 | EmitBasicBlockStart(I); |
| 421 | for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end(); |
| 422 | II != IE; ++II) { |
| 423 | // Print the assembly for the instruction. |
| 424 | if (!II->isLabel()) |
| 425 | HasAnyRealCode = true; |
| 426 | |
| 427 | ++EmittedInsts; |
| 428 | |
Chris Lattner | 2851995 | 2010-04-04 18:18:51 +0000 | [diff] [blame] | 429 | if (ShouldPrintDebugScopes) |
| 430 | DW->BeginScope(II); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 431 | |
Chris Lattner | 47529c9 | 2010-02-10 00:47:53 +0000 | [diff] [blame] | 432 | if (VerboseAsm) |
| 433 | EmitComments(*II, OutStreamer.GetCommentOS()); |
| 434 | |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 435 | switch (II->getOpcode()) { |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 436 | case TargetOpcode::DBG_LABEL: |
| 437 | case TargetOpcode::EH_LABEL: |
| 438 | case TargetOpcode::GC_LABEL: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 439 | OutStreamer.EmitLabel(II->getOperand(0).getMCSymbol()); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 440 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 441 | case TargetOpcode::INLINEASM: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 442 | EmitInlineAsm(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 443 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 444 | case TargetOpcode::IMPLICIT_DEF: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 445 | EmitImplicitDef(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 446 | break; |
Chris Lattner | 518bb53 | 2010-02-09 19:54:29 +0000 | [diff] [blame] | 447 | case TargetOpcode::KILL: |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 448 | EmitKill(II); |
Chris Lattner | 0d883e3 | 2010-02-03 01:00:52 +0000 | [diff] [blame] | 449 | break; |
| 450 | default: |
| 451 | EmitInstruction(II); |
| 452 | break; |
| 453 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 454 | |
Chris Lattner | 2851995 | 2010-04-04 18:18:51 +0000 | [diff] [blame] | 455 | if (ShouldPrintDebugScopes) |
| 456 | DW->EndScope(II); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 457 | } |
| 458 | } |
| 459 | |
| 460 | // 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] | 461 | // then we need to emit *something* to the function body to prevent the |
| 462 | // labels from collapsing together. Just emit a 0 byte. |
Chris Lattner | 10e7c60 | 2010-01-28 01:06:32 +0000 | [diff] [blame] | 463 | if (MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode) |
| 464 | OutStreamer.EmitIntValue(0, 1, 0/*addrspace*/); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 465 | |
Chris Lattner | edfe776 | 2010-01-28 01:58:58 +0000 | [diff] [blame] | 466 | // Emit target-specific gunk after the function body. |
| 467 | EmitFunctionBodyEnd(); |
| 468 | |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 469 | // If the target wants a .size directive for the size of the function, emit |
| 470 | // it. |
| 471 | if (MAI->hasDotTypeDotSizeDirective()) { |
Chris Lattner | 0c08d09 | 2010-04-03 22:28:33 +0000 | [diff] [blame] | 472 | // Create a symbol for the end of function, so we can get the size as |
| 473 | // difference between the function label and the temp label. |
| 474 | MCSymbol *FnEndLabel = OutContext.CreateTempSymbol(); |
| 475 | OutStreamer.EmitLabel(FnEndLabel); |
| 476 | |
| 477 | const MCExpr *SizeExp = |
| 478 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext), |
| 479 | MCSymbolRefExpr::Create(CurrentFnSym, OutContext), |
| 480 | OutContext); |
| 481 | OutStreamer.EmitELFSize(CurrentFnSym, SizeExp); |
Chris Lattner | fd60b8b | 2010-04-03 22:19:41 +0000 | [diff] [blame] | 482 | } |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 483 | |
| 484 | // Emit post-function debug information. |
| 485 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
| 486 | DW->EndFunction(MF); |
| 487 | |
| 488 | // Print out jump tables referenced by the function. |
| 489 | EmitJumpTableInfo(); |
Chris Lattner | d26a80f | 2010-02-03 01:49:49 +0000 | [diff] [blame] | 490 | |
| 491 | OutStreamer.AddBlankLine(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 495 | bool AsmPrinter::doFinalization(Module &M) { |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 496 | // Emit global variables. |
| 497 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 498 | I != E; ++I) |
Chris Lattner | 48d64ba | 2010-01-19 04:39:15 +0000 | [diff] [blame] | 499 | EmitGlobalVariable(I); |
Chris Lattner | 40bbebd | 2009-07-21 18:38:57 +0000 | [diff] [blame] | 500 | |
Chris Lattner | 1f522fe | 2009-06-24 18:54:37 +0000 | [diff] [blame] | 501 | // Emit final debug information. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 502 | if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling()) |
Chris Lattner | 1f522fe | 2009-06-24 18:54:37 +0000 | [diff] [blame] | 503 | DW->EndModule(); |
| 504 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 505 | // If the target wants to know about weak references, print them all. |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 506 | if (MAI->getWeakRefDirective()) { |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 507 | // FIXME: This is not lazy, it would be nice to only print weak references |
| 508 | // to stuff that is actually used. Note that doing so would require targets |
| 509 | // to notice uses in operands (due to constant exprs etc). This should |
| 510 | // happen with the MC stuff eventually. |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 511 | |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 512 | // Print out module-level global variables here. |
| 513 | for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| 514 | I != E; ++I) { |
Chris Lattner | 08ce3b4 | 2010-01-16 18:17:26 +0000 | [diff] [blame] | 515 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 516 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 517 | } |
| 518 | |
Chris Lattner | c6fdced | 2009-08-03 23:10:34 +0000 | [diff] [blame] | 519 | 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] | 520 | if (!I->hasExternalWeakLinkage()) continue; |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 521 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(I), MCSA_WeakReference); |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 522 | } |
Rafael Espindola | 15404d0 | 2006-12-18 03:37:18 +0000 | [diff] [blame] | 523 | } |
| 524 | |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 525 | if (MAI->hasSetDirective()) { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 526 | OutStreamer.AddBlankLine(); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 527 | 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] | 528 | I != E; ++I) { |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 529 | MCSymbol *Name = Mang->getSymbol(I); |
Anton Korobeynikov | 325be7c | 2007-09-06 17:21:48 +0000 | [diff] [blame] | 530 | |
| 531 | const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal()); |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 532 | MCSymbol *Target = Mang->getSymbol(GV); |
Anton Korobeynikov | 541af7f | 2008-09-24 22:21:04 +0000 | [diff] [blame] | 533 | |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 534 | if (I->hasExternalLinkage() || !MAI->getWeakRefDirective()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 535 | OutStreamer.EmitSymbolAttribute(Name, MCSA_Global); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 536 | else if (I->hasWeakLinkage()) |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 537 | OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference); |
Chris Lattner | 10b318b | 2010-01-17 21:43:43 +0000 | [diff] [blame] | 538 | else |
Chris Lattner | 1059549 | 2010-01-16 01:37:14 +0000 | [diff] [blame] | 539 | assert(I->hasLocalLinkage() && "Invalid alias linkage"); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 540 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 541 | EmitVisibility(Name, I->getVisibility()); |
Anton Korobeynikov | 22c9e65 | 2008-03-11 21:41:14 +0000 | [diff] [blame] | 542 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 543 | // Emit the directives as assignments aka .set: |
| 544 | OutStreamer.EmitAssignment(Name, |
| 545 | MCSymbolRefExpr::Create(Target, OutContext)); |
Anton Korobeynikov | 8b0a8c8 | 2007-04-25 14:27:10 +0000 | [diff] [blame] | 546 | } |
| 547 | } |
| 548 | |
Duncan Sands | 1465d61 | 2009-01-28 13:14:17 +0000 | [diff] [blame] | 549 | GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>(); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 550 | assert(MI && "AsmPrinter didn't require GCModuleInfo?"); |
| 551 | for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; ) |
| 552 | if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I)) |
Chris Lattner | 7d73c7f | 2010-04-04 07:39:04 +0000 | [diff] [blame] | 553 | MP->finishAssembly(*this); |
Gordon Henriksen | ce22477 | 2008-01-07 01:30:38 +0000 | [diff] [blame] | 554 | |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 555 | // If we don't have any trampolines, then we don't require stack memory |
| 556 | // to be executable. Some targets have a directive to declare this. |
Chris Lattner | 0a7befa | 2009-06-24 18:52:01 +0000 | [diff] [blame] | 557 | Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline"); |
Dan Gohman | a779a98 | 2008-05-05 00:28:39 +0000 | [diff] [blame] | 558 | if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty()) |
Chris Lattner | f9f93e4 | 2010-01-23 07:21:06 +0000 | [diff] [blame] | 559 | if (MCSection *S = MAI->getNonexecutableStackSection(OutContext)) |
| 560 | OutStreamer.SwitchSection(S); |
Chris Lattner | bd23d5f | 2009-09-18 20:17:03 +0000 | [diff] [blame] | 561 | |
| 562 | // Allow the target to emit any magic that it wants at the end of the file, |
| 563 | // after everything else has gone out. |
| 564 | EmitEndOfAsmFile(M); |
| 565 | |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 566 | delete Mang; Mang = 0; |
Chris Lattner | 0de1fc4 | 2009-06-24 19:09:55 +0000 | [diff] [blame] | 567 | DW = 0; MMI = 0; |
Chris Lattner | 2b2954f | 2009-07-27 21:28:04 +0000 | [diff] [blame] | 568 | |
| 569 | OutStreamer.Finish(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 570 | return false; |
| 571 | } |
| 572 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 573 | void AsmPrinter::SetupMachineFunction(MachineFunction &MF) { |
Chris Lattner | b84822f | 2010-01-26 04:35:26 +0000 | [diff] [blame] | 574 | this->MF = &MF; |
Chris Lattner | 412c3a5 | 2010-01-16 01:24:10 +0000 | [diff] [blame] | 575 | // Get the function symbol. |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 576 | CurrentFnSym = Mang->getSymbol(MF.getFunction()); |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 577 | |
Chris Lattner | 25d812b | 2009-09-16 00:35:39 +0000 | [diff] [blame] | 578 | if (VerboseAsm) |
David Greene | b71d1b2 | 2009-08-10 16:38:07 +0000 | [diff] [blame] | 579 | LI = &getAnalysis<MachineLoopInfo>(); |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 580 | } |
| 581 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 582 | namespace { |
| 583 | // SectionCPs - Keep track the alignment, constpool entries per Section. |
| 584 | struct SectionCPs { |
Chris Lattner | a87dea4 | 2009-07-31 18:48:30 +0000 | [diff] [blame] | 585 | const MCSection *S; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 586 | unsigned Alignment; |
| 587 | SmallVector<unsigned, 4> CPEs; |
Douglas Gregor | cabdd74 | 2009-12-19 07:05:23 +0000 | [diff] [blame] | 588 | SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {} |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 589 | }; |
| 590 | } |
| 591 | |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 592 | /// EmitConstantPool - Print to the current output stream assembly |
| 593 | /// representations of the constants in the constant pool MCP. This is |
| 594 | /// used to print out constants which have been "spilled to memory" by |
| 595 | /// the code generator. |
| 596 | /// |
Chris Lattner | a240619 | 2010-01-28 00:19:24 +0000 | [diff] [blame] | 597 | void AsmPrinter::EmitConstantPool() { |
| 598 | const MachineConstantPool *MCP = MF->getConstantPool(); |
Chris Lattner | fa77d43 | 2006-02-09 04:22:52 +0000 | [diff] [blame] | 599 | const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants(); |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 600 | if (CP.empty()) return; |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 601 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 602 | // Calculate sections for constant pool entries. We collect entries to go into |
| 603 | // the same section together to reduce amount of section switch statements. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 604 | SmallVector<SectionCPs, 4> CPSections; |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 605 | for (unsigned i = 0, e = CP.size(); i != e; ++i) { |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 606 | const MachineConstantPoolEntry &CPE = CP[i]; |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 607 | unsigned Align = CPE.getAlignment(); |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 608 | |
| 609 | SectionKind Kind; |
| 610 | switch (CPE.getRelocationInfo()) { |
| 611 | default: llvm_unreachable("Unknown section kind"); |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 612 | case 2: Kind = SectionKind::getReadOnlyWithRel(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 613 | case 1: |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 614 | Kind = SectionKind::getReadOnlyWithRelLocal(); |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 615 | break; |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 616 | case 0: |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 617 | switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) { |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 618 | case 4: Kind = SectionKind::getMergeableConst4(); break; |
| 619 | case 8: Kind = SectionKind::getMergeableConst8(); break; |
| 620 | case 16: Kind = SectionKind::getMergeableConst16();break; |
| 621 | default: Kind = SectionKind::getMergeableConst(); break; |
Chris Lattner | 4c50922 | 2009-07-26 07:00:12 +0000 | [diff] [blame] | 622 | } |
Chris Lattner | 5c2f789 | 2009-07-26 06:26:55 +0000 | [diff] [blame] | 623 | } |
| 624 | |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 625 | const MCSection *S = getObjFileLowering().getSectionForConstant(Kind); |
Chris Lattner | 298414e | 2009-07-22 00:28:43 +0000 | [diff] [blame] | 626 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 627 | // The number of sections are small, just do a linear search from the |
| 628 | // last section to the first. |
| 629 | bool Found = false; |
| 630 | unsigned SecIdx = CPSections.size(); |
| 631 | while (SecIdx != 0) { |
| 632 | if (CPSections[--SecIdx].S == S) { |
| 633 | Found = true; |
| 634 | break; |
| 635 | } |
| 636 | } |
| 637 | if (!Found) { |
| 638 | SecIdx = CPSections.size(); |
| 639 | CPSections.push_back(SectionCPs(S, Align)); |
| 640 | } |
| 641 | |
| 642 | if (Align > CPSections[SecIdx].Alignment) |
| 643 | CPSections[SecIdx].Alignment = Align; |
| 644 | CPSections[SecIdx].CPEs.push_back(i); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 645 | } |
| 646 | |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 647 | // Now print stuff into the calculated sections. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 648 | for (unsigned i = 0, e = CPSections.size(); i != e; ++i) { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 649 | OutStreamer.SwitchSection(CPSections[i].S); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 650 | EmitAlignment(Log2_32(CPSections[i].Alignment)); |
Evan Cheng | 2d2cec1 | 2006-06-29 00:26:09 +0000 | [diff] [blame] | 651 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 652 | unsigned Offset = 0; |
| 653 | for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) { |
| 654 | unsigned CPI = CPSections[i].CPEs[j]; |
| 655 | MachineConstantPoolEntry CPE = CP[CPI]; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 656 | |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 657 | // Emit inter-object padding for alignment. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 658 | unsigned AlignMask = CPE.getAlignment() - 1; |
| 659 | unsigned NewOffset = (Offset + AlignMask) & ~AlignMask; |
Chris Lattner | aaec205 | 2010-01-19 19:46:13 +0000 | [diff] [blame] | 660 | OutStreamer.EmitFill(NewOffset - Offset, 0/*fillval*/, 0/*addrspace*/); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 661 | |
| 662 | const Type *Ty = CPE.getType(); |
Duncan Sands | 777d230 | 2009-05-09 07:06:46 +0000 | [diff] [blame] | 663 | Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty); |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 664 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 665 | // Emit the label with a comment on it. |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 666 | if (VerboseAsm) { |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 667 | OutStreamer.GetCommentOS() << "constant pool "; |
| 668 | WriteTypeSymbolic(OutStreamer.GetCommentOS(), CPE.getType(), |
| 669 | MF->getFunction()->getParent()); |
| 670 | OutStreamer.GetCommentOS() << '\n'; |
Anton Korobeynikov | 088ae83 | 2008-09-24 22:17:59 +0000 | [diff] [blame] | 671 | } |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 672 | OutStreamer.EmitLabel(GetCPISymbol(CPI)); |
| 673 | |
Evan Cheng | 1606e8e | 2009-03-13 07:51:59 +0000 | [diff] [blame] | 674 | if (CPE.isMachineConstantPoolEntry()) |
| 675 | EmitMachineConstantPoolValue(CPE.Val.MachineCPVal); |
| 676 | else |
| 677 | EmitGlobalConstant(CPE.Val.ConstVal); |
Chris Lattner | 3029f92 | 2006-02-09 04:46:04 +0000 | [diff] [blame] | 678 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 679 | } |
| 680 | } |
| 681 | |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 682 | /// EmitJumpTableInfo - Print assembly representations of the jump tables used |
| 683 | /// by the current function to the current output stream. |
| 684 | /// |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 685 | void AsmPrinter::EmitJumpTableInfo() { |
| 686 | const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo(); |
Chris Lattner | 44e8725 | 2010-01-25 22:41:33 +0000 | [diff] [blame] | 687 | if (MJTI == 0) return; |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 688 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_Inline) return; |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 689 | const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables(); |
| 690 | if (JT.empty()) return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 691 | |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 692 | // Pick the directive to use to print the jump table entries, and switch to |
| 693 | // the appropriate section. |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 694 | const Function *F = MF->getFunction(); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 695 | bool JTInDiffSection = false; |
Chris Lattner | f1214cb | 2010-01-26 06:53:37 +0000 | [diff] [blame] | 696 | if (// In PIC mode, we need to emit the jump table to the same section as the |
| 697 | // function body itself, otherwise the label differences won't make sense. |
| 698 | // FIXME: Need a better predicate for this: what about custom entries? |
| 699 | MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 || |
| 700 | // We should also do if the section name is NULL or function is declared |
| 701 | // in discardable section |
| 702 | // FIXME: this isn't the right predicate, should be based on the MCSection |
| 703 | // for the function. |
| 704 | F->isWeakForLinker()) { |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 705 | OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM)); |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 706 | } else { |
Chris Lattner | 83d77fa | 2009-08-01 23:46:12 +0000 | [diff] [blame] | 707 | // Otherwise, drop it in the readonly section. |
| 708 | const MCSection *ReadOnlySection = |
Chris Lattner | 2798119 | 2009-08-01 23:57:16 +0000 | [diff] [blame] | 709 | getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly()); |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 710 | OutStreamer.SwitchSection(ReadOnlySection); |
Evan Cheng | b13bafe | 2009-06-18 20:37:15 +0000 | [diff] [blame] | 711 | JTInDiffSection = true; |
Nate Begeman | 2f1ae88 | 2006-07-27 01:13:04 +0000 | [diff] [blame] | 712 | } |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 713 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 714 | EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getTargetData()))); |
Chris Lattner | 0c4e678 | 2006-07-15 01:34:12 +0000 | [diff] [blame] | 715 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 716 | for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) { |
| 717 | const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs; |
Chris Lattner | 0737188 | 2006-10-28 18:10:06 +0000 | [diff] [blame] | 718 | |
| 719 | // If this jump table was deleted, ignore it. |
| 720 | if (JTBBs.empty()) continue; |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 721 | |
Chris Lattner | e35df92 | 2010-01-26 05:15:20 +0000 | [diff] [blame] | 722 | // For the EK_LabelDifference32 entry, if the target supports .set, emit a |
| 723 | // .set directive for each unique entry. This reduces the number of |
| 724 | // relocations the assembler will generate for the jump table. |
| 725 | if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 && |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 726 | MAI->hasSetDirective()) { |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 727 | SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets; |
| 728 | const TargetLowering *TLI = TM.getTargetLowering(); |
Chris Lattner | 14c38ec | 2010-01-28 01:02:27 +0000 | [diff] [blame] | 729 | const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 730 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) { |
| 731 | const MachineBasicBlock *MBB = JTBBs[ii]; |
| 732 | if (!EmittedSets.insert(MBB)) continue; |
| 733 | |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 734 | // .set LJTSet, LBB32-base |
| 735 | const MCExpr *LHS = |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 736 | MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | c618c8a | 2010-01-26 21:53:08 +0000 | [diff] [blame] | 737 | OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()), |
| 738 | MCBinaryExpr::CreateSub(LHS, Base, OutContext)); |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 739 | } |
| 740 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 741 | |
Chris Lattner | 7c30191 | 2009-09-13 19:02:16 +0000 | [diff] [blame] | 742 | // 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] | 743 | // before each jump table. The first label is never referenced, but tells |
| 744 | // the assembler and linker the extents of the jump table object. The |
| 745 | // second label is actually referenced by the code. |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 746 | if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0]) |
Chris Lattner | beeb93e | 2010-01-26 05:58:28 +0000 | [diff] [blame] | 747 | // FIXME: This doesn't have to have any specific name, just any randomly |
| 748 | // named and numbered 'l' label would work. Simplify GetJTISymbol. |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 749 | OutStreamer.EmitLabel(GetJTISymbol(JTI, true)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 750 | |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 751 | OutStreamer.EmitLabel(GetJTISymbol(JTI)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 752 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 753 | for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) |
Chris Lattner | 3b131d7 | 2010-01-26 06:42:44 +0000 | [diff] [blame] | 754 | EmitJumpTableEntry(MJTI, JTBBs[ii], JTI); |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 755 | } |
| 756 | } |
| 757 | |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 758 | /// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the |
| 759 | /// current stream. |
| 760 | void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI, |
| 761 | const MachineBasicBlock *MBB, |
| 762 | unsigned UID) const { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 763 | const MCExpr *Value = 0; |
| 764 | switch (MJTI->getEntryKind()) { |
Richard Osborne | 95da605 | 2010-03-11 14:58:16 +0000 | [diff] [blame] | 765 | case MachineJumpTableInfo::EK_Inline: |
| 766 | llvm_unreachable("Cannot emit EK_Inline jump table entry"); break; |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 767 | case MachineJumpTableInfo::EK_Custom32: |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 768 | Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID, |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 769 | OutContext); |
| 770 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 771 | case MachineJumpTableInfo::EK_BlockAddress: |
| 772 | // EK_BlockAddress - Each entry is a plain address of block, e.g.: |
| 773 | // .word LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 774 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 775 | break; |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 776 | case MachineJumpTableInfo::EK_GPRel32BlockAddress: { |
| 777 | // EK_GPRel32BlockAddress - Each entry is an address of block, encoded |
| 778 | // with a relocation as gp-relative, e.g.: |
| 779 | // .gprel32 LBB123 |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 780 | MCSymbol *MBBSym = MBB->getSymbol(); |
Chris Lattner | 718fb59 | 2010-01-25 21:28:50 +0000 | [diff] [blame] | 781 | OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext)); |
Chris Lattner | 78f485a | 2010-01-25 21:10:10 +0000 | [diff] [blame] | 782 | return; |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 783 | } |
Chris Lattner | 85fe078 | 2010-01-26 04:05:28 +0000 | [diff] [blame] | 784 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 785 | case MachineJumpTableInfo::EK_LabelDifference32: { |
| 786 | // EK_LabelDifference32 - Each entry is the address of the block minus |
| 787 | // the address of the jump table. This is used for PIC jump tables where |
| 788 | // gprel32 is not supported. e.g.: |
| 789 | // .word LBB123 - LJTI1_2 |
| 790 | // If the .set directive is supported, this is emitted as: |
| 791 | // .set L4_5_set_123, LBB123 - LJTI1_2 |
| 792 | // .word L4_5_set_123 |
| 793 | |
| 794 | // If we have emitted set directives for the jump table entries, print |
| 795 | // them rather than the entries themselves. If we're emitting PIC, then |
| 796 | // emit the table entries as differences between two text section labels. |
Chris Lattner | cee6332 | 2010-01-26 20:40:54 +0000 | [diff] [blame] | 797 | if (MAI->hasSetDirective()) { |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 798 | // If we used .set, reference the .set's symbol. |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 799 | Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()), |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 800 | OutContext); |
| 801 | break; |
| 802 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 803 | // Otherwise, use the difference as the jump table entry. |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 804 | Value = MCSymbolRefExpr::Create(MBB->getSymbol(), OutContext); |
Chris Lattner | 6bf1def | 2010-01-26 05:10:10 +0000 | [diff] [blame] | 805 | const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 806 | Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext); |
| 807 | break; |
| 808 | } |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 809 | } |
Chris Lattner | 1aca249 | 2010-01-25 21:22:22 +0000 | [diff] [blame] | 810 | |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 811 | assert(Value && "Unknown entry kind!"); |
| 812 | |
Chris Lattner | 071c62f | 2010-01-25 23:26:13 +0000 | [diff] [blame] | 813 | unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData()); |
Chris Lattner | ff537ce | 2010-01-26 03:43:22 +0000 | [diff] [blame] | 814 | OutStreamer.EmitValue(Value, EntrySize, /*addrspace*/0); |
Anton Korobeynikov | 9de1934 | 2007-11-14 09:18:41 +0000 | [diff] [blame] | 815 | } |
| 816 | |
| 817 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 818 | /// EmitSpecialLLVMGlobal - Check to see if the specified global is a |
| 819 | /// special global used by LLVM. If so, emit it and return true, otherwise |
| 820 | /// do nothing and return false. |
| 821 | bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) { |
Daniel Dunbar | 03d7651 | 2009-07-25 23:55:21 +0000 | [diff] [blame] | 822 | if (GV->getName() == "llvm.used") { |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 823 | if (MAI->hasNoDeadStrip()) // No need to emit this at all. |
Andrew Lenharth | b753a9b | 2007-08-22 19:33:11 +0000 | [diff] [blame] | 824 | EmitLLVMUsedList(GV->getInitializer()); |
| 825 | return true; |
| 826 | } |
| 827 | |
Chris Lattner | 401e10c | 2009-07-20 06:14:25 +0000 | [diff] [blame] | 828 | // Ignore debug and non-emitted data. This handles llvm.compiler.used. |
Chris Lattner | 266c7bb | 2009-04-13 05:44:34 +0000 | [diff] [blame] | 829 | if (GV->getSection() == "llvm.metadata" || |
| 830 | GV->hasAvailableExternallyLinkage()) |
| 831 | return true; |
Jim Laskey | 7809811 | 2006-03-07 22:00:35 +0000 | [diff] [blame] | 832 | |
| 833 | if (!GV->hasAppendingLinkage()) return false; |
| 834 | |
| 835 | assert(GV->hasInitializer() && "Not a special LLVM global!"); |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 836 | |
Evan Cheng | 916d07c | 2007-06-04 20:39:18 +0000 | [diff] [blame] | 837 | const TargetData *TD = TM.getTargetData(); |
| 838 | unsigned Align = Log2_32(TD->getPointerPrefAlignment()); |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 839 | if (GV->getName() == "llvm.global_ctors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 840 | OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection()); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 841 | EmitAlignment(Align, 0); |
| 842 | EmitXXStructorList(GV->getInitializer()); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 843 | |
| 844 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 845 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 846 | StringRef Sym(".constructors_used"); |
| 847 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 848 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 849 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 850 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 851 | } |
| 852 | |
Chris Lattner | f231c07 | 2009-03-09 05:52:15 +0000 | [diff] [blame] | 853 | if (GV->getName() == "llvm.global_dtors") { |
Chris Lattner | 6c2f9e1 | 2009-08-19 05:49:37 +0000 | [diff] [blame] | 854 | OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection()); |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 855 | EmitAlignment(Align, 0); |
| 856 | EmitXXStructorList(GV->getInitializer()); |
Chris Lattner | 71eae71 | 2010-01-19 04:34:02 +0000 | [diff] [blame] | 857 | |
| 858 | if (TM.getRelocationModel() == Reloc::Static && |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 859 | MAI->hasStaticCtorDtorReferenceInStaticMode()) { |
| 860 | StringRef Sym(".destructors_used"); |
| 861 | OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym), |
Chris Lattner | a5ad93a | 2010-01-23 06:39:22 +0000 | [diff] [blame] | 862 | MCSA_Reference); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 863 | } |
Chris Lattner | ea3a9ff | 2009-03-09 08:18:48 +0000 | [diff] [blame] | 864 | return true; |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 865 | } |
| 866 | |
| 867 | return false; |
| 868 | } |
| 869 | |
Chris Lattner | 33adcfb | 2009-08-22 21:43:10 +0000 | [diff] [blame] | 870 | /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each |
Dale Johannesen | d2e51af | 2008-09-09 22:29:13 +0000 | [diff] [blame] | 871 | /// global in the specified llvm.used list for which emitUsedDirectiveFor |
| 872 | /// is true, as being used with this directive. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 873 | void AsmPrinter::EmitLLVMUsedList(Constant *List) { |
Dan Gohman | a119de8 | 2009-06-14 23:30:43 +0000 | [diff] [blame] | 874 | // Should be an array of 'i8*'. |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 875 | ConstantArray *InitList = dyn_cast<ConstantArray>(List); |
| 876 | if (InitList == 0) return; |
| 877 | |
| 878 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) { |
Chris Lattner | 16fe990 | 2009-07-17 22:00:23 +0000 | [diff] [blame] | 879 | const GlobalValue *GV = |
| 880 | dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts()); |
Chris Lattner | 3a9be0e | 2010-01-23 05:51:36 +0000 | [diff] [blame] | 881 | if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 882 | OutStreamer.EmitSymbolAttribute(Mang->getSymbol(GV), MCSA_NoDeadStrip); |
Chris Lattner | cb05af8 | 2006-09-26 03:38:18 +0000 | [diff] [blame] | 883 | } |
| 884 | } |
| 885 | |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 886 | /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the |
| 887 | /// function pointers, ignoring the init priority. |
| 888 | void AsmPrinter::EmitXXStructorList(Constant *List) { |
| 889 | // Should be an array of '{ int, void ()* }' structs. The first value is the |
| 890 | // init priority, which we ignore. |
| 891 | if (!isa<ConstantArray>(List)) return; |
| 892 | ConstantArray *InitList = cast<ConstantArray>(List); |
| 893 | for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) |
| 894 | if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){ |
| 895 | if (CS->getNumOperands() != 2) return; // Not array of 2-element structs. |
Chris Lattner | 8de324b | 2005-12-21 01:17:37 +0000 | [diff] [blame] | 896 | |
| 897 | if (CS->getOperand(1)->isNullValue()) |
| 898 | return; // Found a null terminator, exit printing. |
| 899 | // Emit the function pointer. |
Chris Lattner | ed13893 | 2005-12-13 06:32:10 +0000 | [diff] [blame] | 900 | EmitGlobalConstant(CS->getOperand(1)); |
| 901 | } |
| 902 | } |
Chris Lattner | 3b4fd32 | 2005-11-21 08:25:09 +0000 | [diff] [blame] | 903 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 904 | //===--------------------------------------------------------------------===// |
| 905 | // Emission and print routines |
| 906 | // |
| 907 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 908 | /// EmitInt8 - Emit a byte directive and value. |
| 909 | /// |
| 910 | void AsmPrinter::EmitInt8(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 911 | OutStreamer.EmitIntValue(Value, 1, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 912 | } |
| 913 | |
| 914 | /// EmitInt16 - Emit a short directive and value. |
| 915 | /// |
| 916 | void AsmPrinter::EmitInt16(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 917 | OutStreamer.EmitIntValue(Value, 2, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 918 | } |
| 919 | |
| 920 | /// EmitInt32 - Emit a long directive and value. |
| 921 | /// |
| 922 | void AsmPrinter::EmitInt32(int Value) const { |
Chris Lattner | 5eaa54e | 2010-01-20 06:45:39 +0000 | [diff] [blame] | 923 | OutStreamer.EmitIntValue(Value, 4, 0/*addrspace*/); |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 924 | } |
| 925 | |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 926 | /// EmitLabelDifference - Emit something like ".long Hi-Lo" where the size |
| 927 | /// in bytes of the directive is specified by Size and Hi/Lo specify the |
| 928 | /// labels. This implicitly uses .set if it is available. |
| 929 | void AsmPrinter::EmitLabelDifference(const MCSymbol *Hi, const MCSymbol *Lo, |
| 930 | unsigned Size) const { |
| 931 | // Get the Hi-Lo expression. |
| 932 | const MCExpr *Diff = |
| 933 | MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(Hi, OutContext), |
| 934 | MCSymbolRefExpr::Create(Lo, OutContext), |
| 935 | OutContext); |
| 936 | |
| 937 | if (!MAI->hasSetDirective()) { |
| 938 | OutStreamer.EmitValue(Diff, Size, 0/*AddrSpace*/); |
| 939 | return; |
| 940 | } |
| 941 | |
| 942 | // Otherwise, emit with .set (aka assignment). |
| 943 | MCSymbol *SetLabel = |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 944 | OutContext.GetOrCreateSymbol(Twine(MAI->getPrivateGlobalPrefix()) + |
| 945 | "set" + Twine(SetCounter++)); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 946 | OutStreamer.EmitAssignment(SetLabel, Diff); |
Chris Lattner | 6cde3e6 | 2010-03-09 00:39:24 +0000 | [diff] [blame] | 947 | OutStreamer.EmitSymbolValue(SetLabel, Size, 0/*AddrSpace*/); |
Chris Lattner | 0d50c76 | 2010-03-08 23:58:37 +0000 | [diff] [blame] | 948 | } |
| 949 | |
| 950 | |
Jim Laskey | f1cdea1 | 2007-01-25 15:12:02 +0000 | [diff] [blame] | 951 | //===----------------------------------------------------------------------===// |
| 952 | |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 953 | // EmitAlignment - Emit an alignment directive to the specified power of |
| 954 | // two boundary. For example, if you pass in 3 here, you will get an 8 |
| 955 | // byte alignment. If a global value is specified, and if that global has |
| 956 | // an explicit alignment requested, it will unconditionally override the |
| 957 | // alignment request. However, if ForcedAlignBits is specified, this value |
| 958 | // has final say: the ultimate alignment will be the max of ForcedAlignBits |
| 959 | // and the alignment computed with NumBits and the global. |
| 960 | // |
| 961 | // The algorithm is: |
| 962 | // Align = NumBits; |
| 963 | // if (GV && GV->hasalignment) Align = GV->getalignment(); |
| 964 | // Align = std::max(Align, ForcedAlignBits); |
| 965 | // |
| 966 | void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV, |
Evan Cheng | 05548eb | 2008-02-29 19:36:59 +0000 | [diff] [blame] | 967 | unsigned ForcedAlignBits, |
| 968 | bool UseFillExpr) const { |
Dale Johannesen | 00d56b9 | 2007-04-23 23:33:31 +0000 | [diff] [blame] | 969 | if (GV && GV->getAlignment()) |
Chris Lattner | 3a42053 | 2007-05-31 18:57:45 +0000 | [diff] [blame] | 970 | NumBits = Log2_32(GV->getAlignment()); |
| 971 | NumBits = std::max(NumBits, ForcedAlignBits); |
| 972 | |
Chris Lattner | 2a21c6e | 2005-11-10 18:09:27 +0000 | [diff] [blame] | 973 | if (NumBits == 0) return; // No need to emit alignment. |
Chris Lattner | 663c2d2 | 2009-08-19 06:12:02 +0000 | [diff] [blame] | 974 | |
Chris Lattner | dabf07c | 2009-08-18 06:15:16 +0000 | [diff] [blame] | 975 | if (getCurrentSection()->getKind().isText()) |
Chris Lattner | 2cce371 | 2010-02-23 18:46:22 +0000 | [diff] [blame] | 976 | OutStreamer.EmitCodeAlignment(1 << NumBits); |
| 977 | else |
| 978 | OutStreamer.EmitValueToAlignment(1 << NumBits, 0, 1, 0); |
Chris Lattner | bfddc20 | 2004-08-17 19:14:29 +0000 | [diff] [blame] | 979 | } |
David Greene | a5bb59f | 2009-08-05 21:00:52 +0000 | [diff] [blame] | 980 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 981 | /// LowerConstant - Lower the specified LLVM Constant to an MCExpr. |
| 982 | /// |
| 983 | static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) { |
| 984 | MCContext &Ctx = AP.OutContext; |
| 985 | |
| 986 | if (CV->isNullValue() || isa<UndefValue>(CV)) |
| 987 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 988 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 989 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) |
| 990 | return MCConstantExpr::Create(CI->getZExtValue(), Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 991 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 992 | if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) |
Chris Lattner | deb0cba | 2010-03-12 21:09:07 +0000 | [diff] [blame] | 993 | return MCSymbolRefExpr::Create(AP.Mang->getSymbol(GV), Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 994 | if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV)) |
| 995 | return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 996 | |
| 997 | const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV); |
| 998 | if (CE == 0) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 999 | llvm_unreachable("Unknown constant value to lower!"); |
| 1000 | return MCConstantExpr::Create(0, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1001 | } |
| 1002 | |
| 1003 | switch (CE->getOpcode()) { |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1004 | default: |
| 1005 | // If the code isn't optimized, there may be outstanding folding |
| 1006 | // opportunities. Attempt to fold the expression using TargetData as a |
| 1007 | // last resort before giving up. |
Dan Gohman | 54e72ec | 2010-02-08 22:19:11 +0000 | [diff] [blame] | 1008 | if (Constant *C = |
| 1009 | ConstantFoldConstantExpression(CE, AP.TM.getTargetData())) |
| 1010 | if (C != CE) |
| 1011 | return LowerConstant(C, AP); |
Dan Gohman | 618f177 | 2010-02-08 22:02:38 +0000 | [diff] [blame] | 1012 | #ifndef NDEBUG |
| 1013 | CE->dump(); |
| 1014 | #endif |
| 1015 | llvm_unreachable("FIXME: Don't support this constant expr"); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1016 | case Instruction::GetElementPtr: { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1017 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1018 | // Generate a symbolic expression for the byte address |
| 1019 | const Constant *PtrVal = CE->getOperand(0); |
| 1020 | SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end()); |
| 1021 | int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), &IdxVec[0], |
| 1022 | IdxVec.size()); |
| 1023 | |
| 1024 | const MCExpr *Base = LowerConstant(CE->getOperand(0), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1025 | if (Offset == 0) |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1026 | return Base; |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1027 | |
| 1028 | // Truncate/sext the offset to the pointer size. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1029 | if (TD.getPointerSizeInBits() != 64) { |
| 1030 | int SExtAmount = 64-TD.getPointerSizeInBits(); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1031 | Offset = (Offset << SExtAmount) >> SExtAmount; |
| 1032 | } |
| 1033 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1034 | return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx), |
| 1035 | Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1036 | } |
| 1037 | |
| 1038 | case Instruction::Trunc: |
| 1039 | // We emit the value and depend on the assembler to truncate the generated |
| 1040 | // expression properly. This is important for differences between |
| 1041 | // blockaddress labels. Since the two labels are in the same function, it |
| 1042 | // is reasonable to treat their delta as a 32-bit value. |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1043 | // FALL THROUGH. |
| 1044 | case Instruction::BitCast: |
| 1045 | return LowerConstant(CE->getOperand(0), AP); |
| 1046 | |
| 1047 | case Instruction::IntToPtr: { |
| 1048 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1049 | // Handle casts to pointers by changing them into casts to the appropriate |
| 1050 | // integer type. This promotes constant folding and simplifies this code. |
| 1051 | Constant *Op = CE->getOperand(0); |
| 1052 | Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()), |
| 1053 | false/*ZExt*/); |
| 1054 | return LowerConstant(Op, AP); |
| 1055 | } |
| 1056 | |
| 1057 | case Instruction::PtrToInt: { |
| 1058 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1059 | // Support only foldable casts to/from pointers that can be eliminated by |
| 1060 | // changing the pointer to the appropriately sized integer type. |
| 1061 | Constant *Op = CE->getOperand(0); |
| 1062 | const Type *Ty = CE->getType(); |
| 1063 | |
| 1064 | const MCExpr *OpExpr = LowerConstant(Op, AP); |
| 1065 | |
| 1066 | // We can emit the pointer value into this slot if the slot is an |
| 1067 | // integer slot equal to the size of the pointer. |
| 1068 | if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType())) |
| 1069 | return OpExpr; |
| 1070 | |
| 1071 | // Otherwise the pointer is smaller than the resultant integer, mask off |
| 1072 | // the high bits so we are sure to get a proper truncation if the input is |
| 1073 | // a constant expr. |
| 1074 | unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType()); |
| 1075 | const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx); |
| 1076 | return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx); |
| 1077 | } |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1078 | |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1079 | // The MC library also has a right-shift operator, but it isn't consistently |
| 1080 | // signed or unsigned between different targets. |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1081 | case Instruction::Add: |
| 1082 | case Instruction::Sub: |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1083 | case Instruction::Mul: |
| 1084 | case Instruction::SDiv: |
| 1085 | case Instruction::SRem: |
| 1086 | case Instruction::Shl: |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1087 | case Instruction::And: |
| 1088 | case Instruction::Or: |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1089 | case Instruction::Xor: { |
| 1090 | const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP); |
| 1091 | const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1092 | switch (CE->getOpcode()) { |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1093 | default: llvm_unreachable("Unknown binary operator constant cast expr"); |
| 1094 | case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx); |
| 1095 | case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx); |
Dan Gohman | 5938a3e | 2010-02-09 00:02:37 +0000 | [diff] [blame] | 1096 | case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx); |
| 1097 | case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx); |
| 1098 | case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx); |
| 1099 | case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx); |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1100 | case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx); |
| 1101 | case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx); |
| 1102 | case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx); |
Chris Lattner | fe0e7ed | 2010-01-13 04:29:19 +0000 | [diff] [blame] | 1103 | } |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1104 | } |
Chris Lattner | a80ba71 | 2004-08-16 23:15:22 +0000 | [diff] [blame] | 1105 | } |
| 1106 | } |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1107 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1108 | static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace, |
| 1109 | AsmPrinter &AP) { |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1110 | if (AddrSpace != 0 || !CA->isString()) { |
| 1111 | // Not a string. Print the values in successive locations |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1112 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1113 | AP.EmitGlobalConstant(CA->getOperand(i), AddrSpace); |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1114 | return; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1115 | } |
Chris Lattner | 05f8453 | 2010-01-23 04:54:10 +0000 | [diff] [blame] | 1116 | |
| 1117 | // Otherwise, it can be emitted as .ascii. |
| 1118 | SmallVector<char, 128> TmpVec; |
| 1119 | TmpVec.reserve(CA->getNumOperands()); |
| 1120 | for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i) |
| 1121 | TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue()); |
| 1122 | |
| 1123 | AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1124 | } |
| 1125 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1126 | static void EmitGlobalConstantVector(const ConstantVector *CV, |
| 1127 | unsigned AddrSpace, AsmPrinter &AP) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1128 | for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i) |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1129 | AP.EmitGlobalConstant(CV->getOperand(i), 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 EmitGlobalConstantStruct(const ConstantStruct *CS, |
| 1133 | unsigned AddrSpace, AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1134 | // Print the fields in successive locations. Pad to align if needed! |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1135 | const TargetData *TD = AP.TM.getTargetData(); |
| 1136 | unsigned Size = TD->getTypeAllocSize(CS->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1137 | const StructLayout *Layout = TD->getStructLayout(CS->getType()); |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1138 | uint64_t SizeSoFar = 0; |
| 1139 | for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) { |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1140 | const Constant *Field = CS->getOperand(i); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1141 | |
| 1142 | // Check if padding is needed and insert one or more 0s. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1143 | uint64_t FieldSize = TD->getTypeAllocSize(Field->getType()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1144 | uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1)) |
| 1145 | - Layout->getElementOffset(i)) - FieldSize; |
| 1146 | SizeSoFar += FieldSize + PadSize; |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1147 | |
| 1148 | // Now print the actual field value. |
Chris Lattner | bcb83e5 | 2010-01-20 07:41:15 +0000 | [diff] [blame] | 1149 | AP.EmitGlobalConstant(Field, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1150 | |
| 1151 | // Insert padding - this may include padding to increase the size of the |
| 1152 | // current field up to the ABI size (if the struct is not packed) as well |
| 1153 | // 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] | 1154 | AP.OutStreamer.EmitZeros(PadSize, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1155 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1156 | assert(SizeSoFar == Layout->getSizeInBytes() && |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1157 | "Layout of constant struct may be incorrect!"); |
| 1158 | } |
| 1159 | |
Chris Lattner | 93b122d | 2010-03-16 21:25:55 +0000 | [diff] [blame] | 1160 | static void EmitGlobalConstantUnion(const ConstantUnion *CU, |
| 1161 | unsigned AddrSpace, AsmPrinter &AP) { |
| 1162 | const TargetData *TD = AP.TM.getTargetData(); |
| 1163 | unsigned Size = TD->getTypeAllocSize(CU->getType()); |
| 1164 | |
| 1165 | const Constant *Contents = CU->getOperand(0); |
| 1166 | unsigned FilledSize = TD->getTypeAllocSize(Contents->getType()); |
| 1167 | |
| 1168 | // Print the actually filled part |
| 1169 | AP.EmitGlobalConstant(Contents, AddrSpace); |
| 1170 | |
| 1171 | // And pad with enough zeroes |
| 1172 | AP.OutStreamer.EmitZeros(Size-FilledSize, AddrSpace); |
| 1173 | } |
| 1174 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1175 | static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace, |
| 1176 | AsmPrinter &AP) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1177 | // FP Constants are printed as integer constants to avoid losing |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1178 | // precision. |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1179 | if (CFP->getType()->isDoubleTy()) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1180 | if (AP.VerboseAsm) { |
Chris Lattner | d79d9dc | 2010-01-22 19:17:48 +0000 | [diff] [blame] | 1181 | double Val = CFP->getValueAPF().convertToDouble(); |
| 1182 | AP.OutStreamer.GetCommentOS() << "double " << Val << '\n'; |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1183 | } |
| 1184 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1185 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1186 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1187 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | if (CFP->getType()->isFloatTy()) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1191 | if (AP.VerboseAsm) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1192 | float Val = CFP->getValueAPF().convertToFloat(); |
| 1193 | AP.OutStreamer.GetCommentOS() << "float " << Val << '\n'; |
Dan Gohman | a12e9d7 | 2009-08-12 18:32:22 +0000 | [diff] [blame] | 1194 | } |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1195 | uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue(); |
| 1196 | AP.OutStreamer.EmitIntValue(Val, 4, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1197 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1198 | } |
| 1199 | |
| 1200 | if (CFP->getType()->isX86_FP80Ty()) { |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1201 | // all long double variants are printed as hex |
| 1202 | // api needed to prevent premature destruction |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1203 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1204 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1205 | if (AP.VerboseAsm) { |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1206 | // Convert to double so we can print the approximate val as a comment. |
| 1207 | APFloat DoubleVal = CFP->getValueAPF(); |
| 1208 | bool ignored; |
| 1209 | DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, |
| 1210 | &ignored); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1211 | AP.OutStreamer.GetCommentOS() << "x86_fp80 ~= " |
| 1212 | << DoubleVal.convertToDouble() << '\n'; |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1213 | } |
| 1214 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1215 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1216 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
| 1217 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 72b5ebc | 2010-01-19 22:11:05 +0000 | [diff] [blame] | 1218 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1219 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1220 | AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1221 | } |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1222 | |
| 1223 | // Emit the tail padding for the long double. |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1224 | const TargetData &TD = *AP.TM.getTargetData(); |
| 1225 | AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) - |
| 1226 | TD.getTypeStoreSize(CFP->getType()), AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1227 | return; |
Chris Lattner | cf0fe8d | 2009-10-05 05:54:46 +0000 | [diff] [blame] | 1228 | } |
| 1229 | |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1230 | assert(CFP->getType()->isPPC_FP128Ty() && |
| 1231 | "Floating point constant type not handled"); |
| 1232 | // All long double variants are printed as hex api needed to prevent |
| 1233 | // premature destruction. |
| 1234 | APInt API = CFP->getValueAPF().bitcastToAPInt(); |
| 1235 | const uint64_t *p = API.getRawData(); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1236 | if (AP.TM.getTargetData()->isBigEndian()) { |
| 1237 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
| 1238 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
Chris Lattner | 9ceff94 | 2010-01-20 06:53:37 +0000 | [diff] [blame] | 1239 | } else { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1240 | AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace); |
| 1241 | AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace); |
Chris Lattner | 09ce674 | 2010-01-19 22:16:33 +0000 | [diff] [blame] | 1242 | } |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1243 | } |
| 1244 | |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1245 | static void EmitGlobalConstantLargeInt(const ConstantInt *CI, |
| 1246 | unsigned AddrSpace, AsmPrinter &AP) { |
| 1247 | const TargetData *TD = AP.TM.getTargetData(); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1248 | unsigned BitWidth = CI->getBitWidth(); |
Chris Lattner | 38c2b0a | 2010-01-13 04:39:46 +0000 | [diff] [blame] | 1249 | assert((BitWidth & 63) == 0 && "only support multiples of 64-bits"); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1250 | |
| 1251 | // We don't expect assemblers to support integer data directives |
| 1252 | // for more than 64 bits, so we emit the data in at most 64-bit |
| 1253 | // quantities at a time. |
| 1254 | const uint64_t *RawData = CI->getValue().getRawData(); |
| 1255 | for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1256 | uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i]; |
| 1257 | AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace); |
Dan Gohman | 00d448a | 2008-12-22 21:14:27 +0000 | [diff] [blame] | 1258 | } |
| 1259 | } |
| 1260 | |
Chris Lattner | 25045bd | 2005-11-21 07:51:36 +0000 | [diff] [blame] | 1261 | /// EmitGlobalConstant - Print a general LLVM constant to the .s file. |
Sanjiv Gupta | c8d7bc8 | 2009-01-30 04:25:10 +0000 | [diff] [blame] | 1262 | void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) { |
Chris Lattner | 043c4e5 | 2010-01-20 07:19:19 +0000 | [diff] [blame] | 1263 | if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) { |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1264 | uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
Bill Wendling | 744f579 | 2010-02-05 00:17:02 +0000 | [diff] [blame] | 1265 | 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] | 1266 | return OutStreamer.EmitZeros(Size, AddrSpace); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1267 | } |
| 1268 | |
| 1269 | if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) { |
| 1270 | unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1271 | switch (Size) { |
| 1272 | case 1: |
| 1273 | case 2: |
| 1274 | case 4: |
| 1275 | case 8: |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1276 | if (VerboseAsm) |
| 1277 | OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue()); |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1278 | OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace); |
| 1279 | return; |
| 1280 | default: |
| 1281 | EmitGlobalConstantLargeInt(CI, AddrSpace, *this); |
| 1282 | return; |
| 1283 | } |
| 1284 | } |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1285 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1286 | if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) |
| 1287 | return EmitGlobalConstantArray(CVA, AddrSpace, *this); |
Chris Lattner | 3cc3a00 | 2010-01-13 04:34:19 +0000 | [diff] [blame] | 1288 | |
Chris Lattner | 91093ec | 2010-01-19 19:10:44 +0000 | [diff] [blame] | 1289 | if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) |
| 1290 | return EmitGlobalConstantStruct(CVS, AddrSpace, *this); |
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 ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) |
Chris Lattner | 2dd245c | 2010-01-20 07:11:32 +0000 | [diff] [blame] | 1293 | return EmitGlobalConstantFP(CFP, AddrSpace, *this); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1294 | |
Chris Lattner | b0bedd6 | 2010-01-20 17:57:50 +0000 | [diff] [blame] | 1295 | if (isa<ConstantPointerNull>(CV)) { |
| 1296 | unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType()); |
| 1297 | OutStreamer.EmitIntValue(0, Size, AddrSpace); |
| 1298 | return; |
| 1299 | } |
| 1300 | |
Chris Lattner | 93b122d | 2010-03-16 21:25:55 +0000 | [diff] [blame] | 1301 | if (const ConstantUnion *CVU = dyn_cast<ConstantUnion>(CV)) |
| 1302 | return EmitGlobalConstantUnion(CVU, AddrSpace, *this); |
| 1303 | |
| 1304 | if (const ConstantVector *V = dyn_cast<ConstantVector>(CV)) |
| 1305 | return EmitGlobalConstantVector(V, AddrSpace, *this); |
| 1306 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1307 | // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it |
| 1308 | // thread the streamer with EmitValue. |
| 1309 | OutStreamer.EmitValue(LowerConstant(CV, *this), |
| 1310 | TM.getTargetData()->getTypeAllocSize(CV->getType()), |
| 1311 | AddrSpace); |
Chris Lattner | 1b7e235 | 2004-08-17 06:36:49 +0000 | [diff] [blame] | 1312 | } |
Chris Lattner | 0264d1a | 2006-01-27 02:10:10 +0000 | [diff] [blame] | 1313 | |
Chris Lattner | fad86b0 | 2008-08-17 07:19:36 +0000 | [diff] [blame] | 1314 | void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) { |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1315 | // Target doesn't support this yet! |
Torok Edwin | c23197a | 2009-07-14 16:55:14 +0000 | [diff] [blame] | 1316 | llvm_unreachable("Target does not support EmitMachineConstantPoolValue"); |
Evan Cheng | d6594ae | 2006-09-12 21:00:35 +0000 | [diff] [blame] | 1317 | } |
| 1318 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1319 | void AsmPrinter::printOffset(int64_t Offset, raw_ostream &OS) const { |
| 1320 | if (Offset > 0) |
| 1321 | OS << '+' << Offset; |
| 1322 | else if (Offset < 0) |
| 1323 | OS << Offset; |
| 1324 | } |
| 1325 | |
Chris Lattner | 6609913 | 2006-02-01 22:41:11 +0000 | [diff] [blame] | 1326 | |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 1327 | /// EmitImplicitDef - This method emits the specified machine instruction |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 1328 | /// that is an implicit def. |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 1329 | void AsmPrinter::EmitImplicitDef(const MachineInstr *MI) const { |
Chris Lattner | c5ea263 | 2009-09-09 23:14:36 +0000 | [diff] [blame] | 1330 | if (!VerboseAsm) return; |
Chris Lattner | 9d1c1ad | 2010-04-04 18:06:11 +0000 | [diff] [blame] | 1331 | unsigned RegNo = MI->getOperand(0).getReg(); |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1332 | OutStreamer.AddComment(Twine("implicit-def: ") + |
Chris Lattner | 9d1c1ad | 2010-04-04 18:06:11 +0000 | [diff] [blame] | 1333 | TM.getRegisterInfo()->getName(RegNo)); |
Chris Lattner | 8e089a9 | 2010-02-10 00:36:00 +0000 | [diff] [blame] | 1334 | OutStreamer.AddBlankLine(); |
Evan Cheng | da47e6e | 2008-03-15 00:03:38 +0000 | [diff] [blame] | 1335 | } |
| 1336 | |
Chris Lattner | 300a4c5 | 2010-04-04 18:14:01 +0000 | [diff] [blame] | 1337 | void AsmPrinter::EmitKill(const MachineInstr *MI) const { |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1338 | if (!VerboseAsm) return; |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1339 | |
| 1340 | std::string Str = "kill:"; |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1341 | for (unsigned n = 0, e = MI->getNumOperands(); n != e; ++n) { |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1342 | const MachineOperand &Op = MI->getOperand(n); |
| 1343 | assert(Op.isReg() && "KILL instruction must have only register operands"); |
| 1344 | Str += ' '; |
Chris Lattner | 9d1c1ad | 2010-04-04 18:06:11 +0000 | [diff] [blame] | 1345 | Str += TM.getRegisterInfo()->getName(Op.getReg()); |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1346 | Str += (Op.isDef() ? "<def>" : "<kill>"); |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1347 | } |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1348 | OutStreamer.AddComment(Str); |
Chris Lattner | 8e089a9 | 2010-02-10 00:36:00 +0000 | [diff] [blame] | 1349 | OutStreamer.AddBlankLine(); |
Jakob Stoklund Olesen | ad68264 | 2009-11-04 19:24:37 +0000 | [diff] [blame] | 1350 | } |
| 1351 | |
Chris Lattner | 9517554 | 2010-02-08 23:10:08 +0000 | [diff] [blame] | 1352 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const { |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1353 | return MMI->getAddrLabelSymbol(BA->getBasicBlock()); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1354 | } |
| 1355 | |
Chris Lattner | 3b9d621 | 2010-03-14 17:53:23 +0000 | [diff] [blame] | 1356 | MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BasicBlock *BB) const { |
| 1357 | return MMI->getAddrLabelSymbol(BB); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1358 | } |
| 1359 | |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1360 | /// GetCPISymbol - Return the symbol for the specified constant pool entry. |
| 1361 | MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1362 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1363 | (Twine(MAI->getPrivateGlobalPrefix()) + "CPI" + Twine(getFunctionNumber()) |
| 1364 | + "_" + Twine(CPID)); |
Chris Lattner | 3924868 | 2010-01-23 05:19:23 +0000 | [diff] [blame] | 1365 | } |
| 1366 | |
| 1367 | /// GetJTISymbol - Return the symbol for the specified jump table entry. |
| 1368 | MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const { |
Chris Lattner | 589c6f6 | 2010-01-26 06:28:43 +0000 | [diff] [blame] | 1369 | return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate); |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1370 | } |
| 1371 | |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1372 | /// GetJTSetSymbol - Return the symbol for the specified jump table .set |
| 1373 | /// FIXME: privatize to AsmPrinter. |
| 1374 | MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const { |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1375 | return OutContext.GetOrCreateSymbol |
Chris Lattner | 98cdab5 | 2010-03-10 02:25:11 +0000 | [diff] [blame] | 1376 | (Twine(MAI->getPrivateGlobalPrefix()) + Twine(getFunctionNumber()) + "_" + |
| 1377 | Twine(UID) + "_set_" + Twine(MBBID)); |
Chris Lattner | 798d125 | 2010-01-25 21:17:10 +0000 | [diff] [blame] | 1378 | } |
| 1379 | |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1380 | /// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1381 | /// 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] | 1382 | /// symbol is forced to have private linkage if ForcePrivate is true. |
| 1383 | MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV, |
| 1384 | StringRef Suffix, |
| 1385 | bool ForcePrivate) const { |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1386 | SmallString<60> NameStr; |
Chris Lattner | 7a2ba94 | 2010-01-16 18:37:32 +0000 | [diff] [blame] | 1387 | Mang->getNameWithPrefix(NameStr, GV, ForcePrivate); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1388 | NameStr.append(Suffix.begin(), Suffix.end()); |
Chris Lattner | 9b97a73 | 2010-03-30 18:10:53 +0000 | [diff] [blame] | 1389 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
Chris Lattner | d588b97 | 2010-01-15 23:25:11 +0000 | [diff] [blame] | 1390 | } |
| 1391 | |
Chris Lattner | 6b04ede | 2010-01-15 23:18:17 +0000 | [diff] [blame] | 1392 | /// GetExternalSymbolSymbol - Return the MCSymbol for the specified |
| 1393 | /// ExternalSymbol. |
| 1394 | MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const { |
| 1395 | SmallString<60> NameStr; |
| 1396 | Mang->getNameWithPrefix(NameStr, Sym); |
| 1397 | return OutContext.GetOrCreateSymbol(NameStr.str()); |
| 1398 | } |
| 1399 | |
Chris Lattner | 7cb384d | 2009-09-12 23:02:08 +0000 | [diff] [blame] | 1400 | |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1401 | |
| 1402 | /// PrintParentLoopComment - Print comments about parent loops of this one. |
| 1403 | static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1404 | unsigned FunctionNumber) { |
| 1405 | if (Loop == 0) return; |
| 1406 | PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber); |
| 1407 | OS.indent(Loop->getLoopDepth()*2) |
| 1408 | << "Parent Loop BB" << FunctionNumber << "_" |
| 1409 | << Loop->getHeader()->getNumber() |
| 1410 | << " Depth=" << Loop->getLoopDepth() << '\n'; |
| 1411 | } |
| 1412 | |
| 1413 | |
| 1414 | /// PrintChildLoopComment - Print comments about child loops within |
| 1415 | /// the loop for this basic block, with nesting. |
| 1416 | static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop, |
| 1417 | unsigned FunctionNumber) { |
| 1418 | // Add child loop information |
| 1419 | for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){ |
| 1420 | OS.indent((*CL)->getLoopDepth()*2) |
| 1421 | << "Child Loop BB" << FunctionNumber << "_" |
| 1422 | << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth() |
| 1423 | << '\n'; |
| 1424 | PrintChildLoopComment(OS, *CL, FunctionNumber); |
| 1425 | } |
| 1426 | } |
| 1427 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1428 | /// EmitBasicBlockLoopComments - Pretty-print comments for basic blocks. |
| 1429 | static void EmitBasicBlockLoopComments(const MachineBasicBlock &MBB, |
| 1430 | const MachineLoopInfo *LI, |
| 1431 | const AsmPrinter &AP) { |
Chris Lattner | 523a508 | 2010-01-22 21:50:41 +0000 | [diff] [blame] | 1432 | // Add loop depth information |
| 1433 | const MachineLoop *Loop = LI->getLoopFor(&MBB); |
| 1434 | if (Loop == 0) return; |
| 1435 | |
| 1436 | MachineBasicBlock *Header = Loop->getHeader(); |
| 1437 | assert(Header && "No header for loop"); |
| 1438 | |
| 1439 | // If this block is not a loop header, just print out what is the loop header |
| 1440 | // and return. |
| 1441 | if (Header != &MBB) { |
| 1442 | AP.OutStreamer.AddComment(" in Loop: Header=BB" + |
| 1443 | Twine(AP.getFunctionNumber())+"_" + |
| 1444 | Twine(Loop->getHeader()->getNumber())+ |
| 1445 | " Depth="+Twine(Loop->getLoopDepth())); |
| 1446 | return; |
| 1447 | } |
| 1448 | |
| 1449 | // Otherwise, it is a loop header. Print out information about child and |
| 1450 | // parent loops. |
| 1451 | raw_ostream &OS = AP.OutStreamer.GetCommentOS(); |
| 1452 | |
| 1453 | PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber()); |
| 1454 | |
| 1455 | OS << "=>"; |
| 1456 | OS.indent(Loop->getLoopDepth()*2-2); |
| 1457 | |
| 1458 | OS << "This "; |
| 1459 | if (Loop->empty()) |
| 1460 | OS << "Inner "; |
| 1461 | OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n'; |
| 1462 | |
| 1463 | PrintChildLoopComment(OS, Loop, AP.getFunctionNumber()); |
| 1464 | } |
| 1465 | |
| 1466 | |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1467 | /// EmitBasicBlockStart - This method prints the label for the specified |
| 1468 | /// MachineBasicBlock, an alignment (if present) and a comment describing |
| 1469 | /// it if appropriate. |
Chris Lattner | 662316c | 2009-09-14 03:15:54 +0000 | [diff] [blame] | 1470 | void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const { |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1471 | // Emit an alignment directive for this block, if needed. |
Chris Lattner | 70a54c0 | 2009-09-13 18:25:37 +0000 | [diff] [blame] | 1472 | if (unsigned Align = MBB->getAlignment()) |
| 1473 | EmitAlignment(Log2_32(Align)); |
Evan Cheng | fb8075d | 2008-02-28 00:43:03 +0000 | [diff] [blame] | 1474 | |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1475 | // If the block has its address taken, emit any labels that were used to |
| 1476 | // reference the block. It is possible that there is more than one label |
| 1477 | // here, because multiple LLVM BB's may have been RAUW'd to this block after |
| 1478 | // the references were generated. |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1479 | if (MBB->hasAddressTaken()) { |
Chris Lattner | 213168b | 2010-01-20 07:24:05 +0000 | [diff] [blame] | 1480 | const BasicBlock *BB = MBB->getBasicBlock(); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1481 | if (VerboseAsm) |
Chris Lattner | 999aee2 | 2010-03-16 00:29:39 +0000 | [diff] [blame] | 1482 | OutStreamer.AddComment("Block address taken"); |
| 1483 | |
| 1484 | std::vector<MCSymbol*> Syms = MMI->getAddrLabelSymbolToEmit(BB); |
| 1485 | |
| 1486 | for (unsigned i = 0, e = Syms.size(); i != e; ++i) |
| 1487 | OutStreamer.EmitLabel(Syms[i]); |
Dan Gohman | 8c2b525 | 2009-10-30 01:27:03 +0000 | [diff] [blame] | 1488 | } |
| 1489 | |
Dan Gohman | b1cac33 | 2009-10-30 01:34:35 +0000 | [diff] [blame] | 1490 | // Print the main label for the block. |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1491 | if (MBB->pred_empty() || isBlockOnlyReachableByFallthrough(MBB)) { |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1492 | if (VerboseAsm && OutStreamer.hasRawTextSupport()) { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1493 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1494 | if (BB->hasName()) |
| 1495 | OutStreamer.AddComment("%" + BB->getName()); |
Chris Lattner | d8d0aee | 2010-01-22 21:00:45 +0000 | [diff] [blame] | 1496 | |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1497 | EmitBasicBlockLoopComments(*MBB, LI, *this); |
Chris Lattner | 58bc4dd | 2010-04-03 22:12:35 +0000 | [diff] [blame] | 1498 | |
| 1499 | // NOTE: Want this comment at start of line, don't emit with AddComment. |
| 1500 | OutStreamer.EmitRawText(Twine(MAI->getCommentString()) + " BB#" + |
| 1501 | Twine(MBB->getNumber()) + ":"); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1502 | } |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1503 | } else { |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1504 | if (VerboseAsm) { |
| 1505 | if (const BasicBlock *BB = MBB->getBasicBlock()) |
| 1506 | if (BB->hasName()) |
| 1507 | OutStreamer.AddComment("%" + BB->getName()); |
Chris Lattner | dfa107e | 2010-04-04 18:16:38 +0000 | [diff] [blame] | 1508 | EmitBasicBlockLoopComments(*MBB, LI, *this); |
Chris Lattner | 0fd90fd | 2010-01-22 19:52:01 +0000 | [diff] [blame] | 1509 | } |
Chris Lattner | d8d0aee | 2010-01-22 21:00:45 +0000 | [diff] [blame] | 1510 | |
Chris Lattner | 1b2eb0e | 2010-03-13 21:04:28 +0000 | [diff] [blame] | 1511 | OutStreamer.EmitLabel(MBB->getSymbol()); |
Dan Gohman | e3cc3f3 | 2009-10-06 17:38:38 +0000 | [diff] [blame] | 1512 | } |
Nate Begeman | 37efe67 | 2006-04-22 18:53:45 +0000 | [diff] [blame] | 1513 | } |
Nate Begeman | 52a51e38 | 2006-08-12 21:29:52 +0000 | [diff] [blame] | 1514 | |
Chris Lattner | be9dfce | 2010-01-28 00:05:10 +0000 | [diff] [blame] | 1515 | void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility) const { |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1516 | MCSymbolAttr Attr = MCSA_Invalid; |
| 1517 | |
| 1518 | switch (Visibility) { |
| 1519 | default: break; |
| 1520 | case GlobalValue::HiddenVisibility: |
| 1521 | Attr = MAI->getHiddenVisibilityAttr(); |
| 1522 | break; |
| 1523 | case GlobalValue::ProtectedVisibility: |
| 1524 | Attr = MAI->getProtectedVisibilityAttr(); |
| 1525 | break; |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 1526 | } |
Chris Lattner | 152a29b | 2010-01-23 06:53:23 +0000 | [diff] [blame] | 1527 | |
| 1528 | if (Attr != MCSA_Invalid) |
| 1529 | OutStreamer.EmitSymbolAttribute(Sym, Attr); |
Chris Lattner | 53d4d78 | 2010-01-15 23:38:51 +0000 | [diff] [blame] | 1530 | } |
| 1531 | |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1532 | /// isBlockOnlyReachableByFallthough - Return true if the basic block has |
| 1533 | /// exactly one predecessor and the control transfer mechanism between |
| 1534 | /// the predecessor and this block is a fall-through. |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 1535 | bool AsmPrinter:: |
| 1536 | isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const { |
Chris Lattner | 0a3f399 | 2010-02-17 18:52:56 +0000 | [diff] [blame] | 1537 | // If this is a landing pad, it isn't a fall through. If it has no preds, |
| 1538 | // then nothing falls through to it. |
| 1539 | if (MBB->isLandingPad() || MBB->pred_empty()) |
| 1540 | return false; |
| 1541 | |
| 1542 | // If there isn't exactly one predecessor, it can't be a fall through. |
| 1543 | MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI; |
| 1544 | ++PI2; |
| 1545 | if (PI2 != MBB->pred_end()) |
| 1546 | return false; |
| 1547 | |
| 1548 | // The predecessor has to be immediately before this block. |
| 1549 | const MachineBasicBlock *Pred = *PI; |
| 1550 | |
| 1551 | if (!Pred->isLayoutSuccessor(MBB)) |
| 1552 | return false; |
| 1553 | |
| 1554 | // If the block is completely empty, then it definitely does fall through. |
| 1555 | if (Pred->empty()) |
| 1556 | return true; |
| 1557 | |
| 1558 | // Otherwise, check the last instruction. |
| 1559 | const MachineInstr &LastInst = Pred->back(); |
| 1560 | return !LastInst.getDesc().isBarrier(); |
| 1561 | } |
| 1562 | |
| 1563 | |
| 1564 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1565 | GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) { |
| 1566 | if (!S->usesMetadata()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1567 | return 0; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 1568 | |
| 1569 | gcp_map_type &GCMap = getGCMap(GCMetadataPrinters); |
| 1570 | gcp_map_type::iterator GCPI = GCMap.find(S); |
| 1571 | if (GCPI != GCMap.end()) |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1572 | return GCPI->second; |
| 1573 | |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1574 | const char *Name = S->getName().c_str(); |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1575 | |
| 1576 | for (GCMetadataPrinterRegistry::iterator |
| 1577 | I = GCMetadataPrinterRegistry::begin(), |
| 1578 | E = GCMetadataPrinterRegistry::end(); I != E; ++I) |
| 1579 | if (strcmp(Name, I->getName()) == 0) { |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1580 | GCMetadataPrinter *GMP = I->instantiate(); |
| 1581 | GMP->S = S; |
Chris Lattner | e00b59f | 2010-04-04 17:57:56 +0000 | [diff] [blame] | 1582 | GCMap.insert(std::make_pair(S, GMP)); |
Gordon Henriksen | 5eca075 | 2008-08-17 18:44:35 +0000 | [diff] [blame] | 1583 | return GMP; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1584 | } |
| 1585 | |
Chris Lattner | 52492ac | 2010-01-23 06:17:14 +0000 | [diff] [blame] | 1586 | llvm_report_error("no GCMetadataPrinter registered for GC: " + Twine(Name)); |
| 1587 | return 0; |
Gordon Henriksen | c317a60 | 2008-08-17 12:08:44 +0000 | [diff] [blame] | 1588 | } |
David Greene | 014700c | 2009-07-13 20:25:48 +0000 | [diff] [blame] | 1589 | |