diff options
author | Stephen Hines <srhines@google.com> | 2014-05-29 02:49:00 -0700 |
---|---|---|
committer | Stephen Hines <srhines@google.com> | 2014-05-29 02:49:00 -0700 |
commit | dce4a407a24b04eebc6a376f8e62b41aaa7b071f (patch) | |
tree | dcebc53f2b182f145a2e659393bf9a0472cedf23 /lib/Target/ARM/ARMAsmPrinter.cpp | |
parent | 220b921aed042f9e520c26cffd8282a94c66c3d5 (diff) | |
download | external_llvm-dce4a407a24b04eebc6a376f8e62b41aaa7b071f.zip external_llvm-dce4a407a24b04eebc6a376f8e62b41aaa7b071f.tar.gz external_llvm-dce4a407a24b04eebc6a376f8e62b41aaa7b071f.tar.bz2 |
Update LLVM for 3.5 rebase (r209712).
Change-Id: I149556c940fb7dc92d075273c87ff584f400941f
Diffstat (limited to 'lib/Target/ARM/ARMAsmPrinter.cpp')
-rw-r--r-- | lib/Target/ARM/ARMAsmPrinter.cpp | 163 |
1 files changed, 112 insertions, 51 deletions
diff --git a/lib/Target/ARM/ARMAsmPrinter.cpp b/lib/Target/ARM/ARMAsmPrinter.cpp index 0fa865f..55e9fe5 100644 --- a/lib/Target/ARM/ARMAsmPrinter.cpp +++ b/lib/Target/ARM/ARMAsmPrinter.cpp @@ -12,7 +12,6 @@ // //===----------------------------------------------------------------------===// -#define DEBUG_TYPE "asm-printer" #include "ARMAsmPrinter.h" #include "ARM.h" #include "ARMConstantPoolValue.h" @@ -45,6 +44,7 @@ #include "llvm/MC/MCStreamer.h" #include "llvm/MC/MCSymbol.h" #include "llvm/Support/ARMBuildAttributes.h" +#include "llvm/Support/COFF.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/Debug.h" #include "llvm/Support/ELF.h" @@ -55,6 +55,8 @@ #include <cctype> using namespace llvm; +#define DEBUG_TYPE "asm-printer" + void ARMAsmPrinter::EmitFunctionBodyEnd() { // Make sure to terminate any constant pools that were at the end // of the function. @@ -85,7 +87,7 @@ void ARMAsmPrinter::EmitXXStructor(const Constant *CV) { ? MCSymbolRefExpr::VK_ARM_TARGET1 : MCSymbolRefExpr::VK_None), OutContext); - + OutStreamer.EmitValue(E, Size); } @@ -96,7 +98,28 @@ bool ARMAsmPrinter::runOnMachineFunction(MachineFunction &MF) { AFI = MF.getInfo<ARMFunctionInfo>(); MCP = MF.getConstantPool(); - return AsmPrinter::runOnMachineFunction(MF); + SetupMachineFunction(MF); + + if (Subtarget->isTargetCOFF()) { + bool Internal = MF.getFunction()->hasInternalLinkage(); + COFF::SymbolStorageClass Scl = Internal ? COFF::IMAGE_SYM_CLASS_STATIC + : COFF::IMAGE_SYM_CLASS_EXTERNAL; + int Type = COFF::IMAGE_SYM_DTYPE_FUNCTION << COFF::SCT_COMPLEX_TYPE_SHIFT; + + OutStreamer.BeginCOFFSymbolDef(CurrentFnSym); + OutStreamer.EmitCOFFSymbolStorageClass(Scl); + OutStreamer.EmitCOFFSymbolType(Type); + OutStreamer.EndCOFFSymbolDef(); + } + + // Have common code print out the function header with linkage info etc. + EmitFunctionHeader(); + + // Emit the rest of the function body. + EmitFunctionBody(); + + // We didn't modify anything. + return false; } void ARMAsmPrinter::printOperand(const MachineInstr *MI, int OpNum, @@ -239,7 +262,7 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum, if (ARM::GPRPairRegClass.contains(RegBegin)) { const TargetRegisterInfo *TRI = MF->getTarget().getRegisterInfo(); unsigned Reg0 = TRI->getSubReg(RegBegin, ARM::gsub_0); - O << ARMInstPrinter::getRegisterName(Reg0) << ", ";; + O << ARMInstPrinter::getRegisterName(Reg0) << ", "; RegBegin = TRI->getSubReg(RegBegin, ARM::gsub_1); } O << ARMInstPrinter::getRegisterName(RegBegin); @@ -383,7 +406,7 @@ void ARMAsmPrinter::emitInlineAsmEnd(const MCSubtargetInfo &StartInfo, // If either end mode is unknown (EndInfo == NULL) or different than // the start mode, then restore the start mode. const bool WasThumb = isThumb(StartInfo); - if (EndInfo == NULL || WasThumb != isThumb(*EndInfo)) { + if (!EndInfo || WasThumb != isThumb(*EndInfo)) { OutStreamer.EmitAssemblerFlag(WasThumb ? MCAF_Code16 : MCAF_Code32); } } @@ -456,6 +479,29 @@ void ARMAsmPrinter::EmitStartOfAsmFile(Module &M) { emitAttributes(); } +static void +emitNonLazySymbolPointer(MCStreamer &OutStreamer, MCSymbol *StubLabel, + MachineModuleInfoImpl::StubValueTy &MCSym) { + // L_foo$stub: + OutStreamer.EmitLabel(StubLabel); + // .indirect_symbol _foo + OutStreamer.EmitSymbolAttribute(MCSym.getPointer(), MCSA_IndirectSymbol); + + if (MCSym.getInt()) + // External to current translation unit. + OutStreamer.EmitIntValue(0, 4/*size*/); + else + // Internal to current translation unit. + // + // When we place the LSDA into the TEXT section, the type info + // pointers need to be indirect and pc-rel. We accomplish this by + // using NLPs; however, sometimes the types are local to the file. + // We need to fill in the value for the NLP in those cases. + OutStreamer.EmitValue( + MCSymbolRefExpr::Create(MCSym.getPointer(), OutStreamer.getContext()), + 4 /*size*/); +} + void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) { if (Subtarget->isTargetMachO()) { @@ -472,27 +518,9 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) { // Switch with ".non_lazy_symbol_pointer" directive. OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection()); EmitAlignment(2); - for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { - // L_foo$stub: - OutStreamer.EmitLabel(Stubs[i].first); - // .indirect_symbol _foo - MachineModuleInfoImpl::StubValueTy &MCSym = Stubs[i].second; - OutStreamer.EmitSymbolAttribute(MCSym.getPointer(),MCSA_IndirectSymbol); - - if (MCSym.getInt()) - // External to current translation unit. - OutStreamer.EmitIntValue(0, 4/*size*/); - else - // Internal to current translation unit. - // - // When we place the LSDA into the TEXT section, the type info - // pointers need to be indirect and pc-rel. We accomplish this by - // using NLPs; however, sometimes the types are local to the file. - // We need to fill in the value for the NLP in those cases. - OutStreamer.EmitValue(MCSymbolRefExpr::Create(MCSym.getPointer(), - OutContext), - 4/*size*/); - } + + for (auto &Stub : Stubs) + emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second); Stubs.clear(); OutStreamer.AddBlankLine(); @@ -500,17 +528,11 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) { Stubs = MMIMacho.GetHiddenGVStubList(); if (!Stubs.empty()) { - OutStreamer.SwitchSection(getObjFileLowering().getDataSection()); + OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection()); EmitAlignment(2); - for (unsigned i = 0, e = Stubs.size(); i != e; ++i) { - // L_foo$stub: - OutStreamer.EmitLabel(Stubs[i].first); - // .long _foo - OutStreamer.EmitValue(MCSymbolRefExpr:: - Create(Stubs[i].second.getPointer(), - OutContext), - 4/*size*/); - } + + for (auto &Stub : Stubs) + emitNonLazySymbolPointer(OutStreamer, Stub.first, Stub.second); Stubs.clear(); OutStreamer.AddBlankLine(); @@ -523,6 +545,28 @@ void ARMAsmPrinter::EmitEndOfAsmFile(Module &M) { // generates code that does this, it is always safe to set. OutStreamer.EmitAssemblerFlag(MCAF_SubsectionsViaSymbols); } + + // Emit a .data.rel section containing any stubs that were created. + if (Subtarget->isTargetELF()) { + const TargetLoweringObjectFileELF &TLOFELF = + static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering()); + + MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>(); + + // Output stubs for external and common global variables. + MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList(); + if (!Stubs.empty()) { + OutStreamer.SwitchSection(TLOFELF.getDataRelSection()); + const DataLayout *TD = TM.getDataLayout(); + + for (auto &stub: Stubs) { + OutStreamer.EmitLabel(stub.first); + OutStreamer.EmitSymbolValue(stub.second.getPointer(), + TD->getPointerSize(0)); + } + Stubs.clear(); + } + } } //===----------------------------------------------------------------------===// @@ -575,7 +619,7 @@ void ARMAsmPrinter::emitAttributes() { getArchForCPU(CPUString, Subtarget)); // Tag_CPU_arch_profile must have the default value of 0 when "Architecture - // profile is not applicable (e.g. pre v7, or cross-profile code)". + // profile is not applicable (e.g. pre v7, or cross-profile code)". if (Subtarget->hasV7Ops()) { if (Subtarget->isAClass()) { ATS.emitAttribute(ARMBuildAttrs::CPU_arch_profile, @@ -627,6 +671,20 @@ void ARMAsmPrinter::emitAttributes() { ATS.emitFPU(ARM::VFPV2); } + if (TM.getRelocationModel() == Reloc::PIC_) { + // PIC specific attributes. + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RW_data, + ARMBuildAttrs::AddressRWPCRel); + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_RO_data, + ARMBuildAttrs::AddressROPCRel); + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use, + ARMBuildAttrs::AddressGOT); + } else { + // Allow direct addressing of imported data for all other relocation models. + ATS.emitAttribute(ARMBuildAttrs::ABI_PCS_GOT_use, + ARMBuildAttrs::AddressDirect); + } + // Signal various FP modes. if (!TM.Options.UnsafeFPMath) { ATS.emitAttribute(ARMBuildAttrs::ABI_FP_denormal, ARMBuildAttrs::Allowed); @@ -723,7 +781,7 @@ MCSymbol *ARMAsmPrinter::GetARMGVSymbol(const GlobalValue *GV, MachineModuleInfoImpl::StubValueTy &StubSym = GV->hasHiddenVisibility() ? MMIMachO.getHiddenGVStubEntry(MCSym) : MMIMachO.getGVStubEntry(MCSym); - if (StubSym.getPointer() == 0) + if (!StubSym.getPointer()) StubSym = MachineModuleInfoImpl:: StubValueTy(getSymbol(GV), !GV->hasInternalLinkage()); return MCSym; @@ -971,7 +1029,8 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) { RegList.push_back(SrcReg); break; } - ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD); + if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM) + ATS.emitRegSave(RegList, Opc == ARM::VSTMDDB_UPD); } else { // Changes of stack / frame pointer. if (SrcReg == ARM::SP) { @@ -1016,18 +1075,20 @@ void ARMAsmPrinter::EmitUnwindingInstruction(const MachineInstr *MI) { } } - if (DstReg == FramePtr && FramePtr != ARM::SP) - // Set-up of the frame pointer. Positive values correspond to "add" - // instruction. - ATS.emitSetFP(FramePtr, ARM::SP, -Offset); - else if (DstReg == ARM::SP) { - // Change of SP by an offset. Positive values correspond to "sub" - // instruction. - ATS.emitPad(Offset); - } else { - // Move of SP to a register. Positive values correspond to an "add" - // instruction. - ATS.emitMovSP(DstReg, -Offset); + if (MAI->getExceptionHandlingType() == ExceptionHandling::ARM) { + if (DstReg == FramePtr && FramePtr != ARM::SP) + // Set-up of the frame pointer. Positive values correspond to "add" + // instruction. + ATS.emitSetFP(FramePtr, ARM::SP, -Offset); + else if (DstReg == ARM::SP) { + // Change of SP by an offset. Positive values correspond to "sub" + // instruction. + ATS.emitPad(Offset); + } else { + // Move of SP to a register. Positive values correspond to an "add" + // instruction. + ATS.emitMovSP(DstReg, -Offset); + } } } else if (DstReg == ARM::SP) { MI->dump(); |