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6880f0e19f
The IR @foo = private constant i32 42 is valid, but before this patch we would produce an invalid MachO from it. It was invalid because it would use an L label in a section where the liker needs the labels in order to atomize it. One way of fixing it would be to just reject this IR in the backend, but that would not be very front end friendly. What this patch does is use an 'l' prefix in sections that we know the linker requires symbols for atomizing them. This allows frontends to just use private and not worry about which sections they go to or how the linker handles them. One small issue with this strategy is that now a symbol name depends on the section, which is not available before codegen. This is not a problem in practice. The reason is that it only happens with private linkage, which will be ignored by the non codegen users (llvm-nm and llvm-ar). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201608 91177308-0d34-0410-b5e6-96231b3b80d8
44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
//===------- SparcTargetObjectFile.cpp - Sparc Object Info Impl -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "SparcTargetObjectFile.h"
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#include "MCTargetDesc/SparcMCExpr.h"
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Target/TargetLowering.h"
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using namespace llvm;
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const MCExpr *SparcELFTargetObjectFile::getTTypeGlobalReference(
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const GlobalValue *GV, unsigned Encoding, Mangler &Mang,
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const TargetMachine &TM, MachineModuleInfo *MMI,
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MCStreamer &Streamer) const {
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if (Encoding & dwarf::DW_EH_PE_pcrel) {
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MachineModuleInfoELF &ELFMMI = MMI->getObjFileInfo<MachineModuleInfoELF>();
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MCSymbol *SSym = getSymbolWithGlobalValueBase(GV, ".DW.stub", Mang, TM);
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// Add information about the stub reference to ELFMMI so that the stub
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// gets emitted by the asmprinter.
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MachineModuleInfoImpl::StubValueTy &StubSym = ELFMMI.getGVStubEntry(SSym);
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if (StubSym.getPointer() == 0) {
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MCSymbol *Sym = TM.getTargetLowering()->getSymbol(GV, Mang);
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StubSym = MachineModuleInfoImpl::StubValueTy(Sym, !GV->hasLocalLinkage());
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}
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MCContext &Ctx = getContext();
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return SparcMCExpr::Create(SparcMCExpr::VK_Sparc_R_DISP32,
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MCSymbolRefExpr::Create(SSym, Ctx), Ctx);
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}
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return TargetLoweringObjectFileELF::getTTypeGlobalReference(
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GV, Encoding, Mang, TM, MMI, Streamer);
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}
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