diff options
author | Chris Lattner <sabre@nondot.org> | 2010-02-08 22:09:08 +0000 |
---|---|---|
committer | Chris Lattner <sabre@nondot.org> | 2010-02-08 22:09:08 +0000 |
commit | 25ceb5f3171b24459e86adf5e18cebaaabe247d3 (patch) | |
tree | 34663bace41b264d54fa5db0d1c1f7221880a1fb /lib | |
parent | df9c4380ee7e60c1de5cae32685b113170b1faa2 (diff) | |
download | llvm-25ceb5f3171b24459e86adf5e18cebaaabe247d3.tar.gz llvm-25ceb5f3171b24459e86adf5e18cebaaabe247d3.tar.bz2 llvm-25ceb5f3171b24459e86adf5e18cebaaabe247d3.tar.xz |
add an x86 implementation of MCTargetExpr for
representing @GOT and friends. Use it for
personality references as a first use.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95588 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r-- | lib/Target/X86/CMakeLists.txt | 1 | ||||
-rw-r--r-- | lib/Target/X86/X86MCTargetExpr.cpp | 43 | ||||
-rw-r--r-- | lib/Target/X86/X86MCTargetExpr.h | 42 | ||||
-rw-r--r-- | lib/Target/X86/X86TargetObjectFile.cpp | 6 |
4 files changed, 89 insertions, 3 deletions
diff --git a/lib/Target/X86/CMakeLists.txt b/lib/Target/X86/CMakeLists.txt index 8f4ff1701e..61f26a7393 100644 --- a/lib/Target/X86/CMakeLists.txt +++ b/lib/Target/X86/CMakeLists.txt @@ -26,6 +26,7 @@ set(sources X86JITInfo.cpp X86MCAsmInfo.cpp X86MCCodeEmitter.cpp + X86MCTargetExpr.cpp X86RegisterInfo.cpp X86Subtarget.cpp X86TargetMachine.cpp diff --git a/lib/Target/X86/X86MCTargetExpr.cpp b/lib/Target/X86/X86MCTargetExpr.cpp new file mode 100644 index 0000000000..1b0d75a0b5 --- /dev/null +++ b/lib/Target/X86/X86MCTargetExpr.cpp @@ -0,0 +1,43 @@ +//===- X86MCTargetExpr.cpp - X86 Target Specific MCExpr Implementation ----===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "X86MCTargetExpr.h" +#include "llvm/MC/MCContext.h" +#include "llvm/MC/MCSymbol.h" +#include "llvm/MC/MCValue.h" +#include "llvm/Support/raw_ostream.h" +using namespace llvm; + +X86MCTargetExpr *X86MCTargetExpr::Create(const MCSymbol *Sym, VariantKind K, + MCContext &Ctx) { + return new (Ctx) X86MCTargetExpr(Sym, K); +} + +void X86MCTargetExpr::PrintImpl(raw_ostream &OS) const { + OS << *Sym; + + switch (Kind) { + case GOT: OS << "@GOT"; break; + case PLT: OS << "@PLT"; break; + case GOTPCREL: OS << "@GOTPCREL"; break; + } +} + +bool X86MCTargetExpr::EvaluateAsRelocatableImpl(MCValue &Res) const { + // FIXME: I don't know if this is right, it followed MCSymbolRefExpr. + + // Evaluate recursively if this is a variable. + if (Sym->isVariable()) + return Sym->getValue()->EvaluateAsRelocatable(Res); + + Res = MCValue::get(Sym, 0, 0); + return true; +} + +X86MCTargetExpr *foo(MCExpr *A) { return (X86MCTargetExpr*)A; }
\ No newline at end of file diff --git a/lib/Target/X86/X86MCTargetExpr.h b/lib/Target/X86/X86MCTargetExpr.h new file mode 100644 index 0000000000..b6d22bb690 --- /dev/null +++ b/lib/Target/X86/X86MCTargetExpr.h @@ -0,0 +1,42 @@ +//===- X86MCTargetExpr.h - X86 Target Specific MCExpr -----------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef X86_MCTARGETEXPR_H +#define X86_MCTARGETEXPR_H + +#include "llvm/MC/MCExpr.h" + +namespace llvm { + +/// X86MCTargetExpr - This class represents symbol variants, like foo@GOT. +class X86MCTargetExpr : public MCTargetExpr { +public: + enum VariantKind { + GOT, + PLT, + GOTPCREL + }; +private: + /// Sym - The symbol being referenced. + const MCSymbol * const Sym; + /// Kind - The modifier. + const VariantKind Kind; + + X86MCTargetExpr(const MCSymbol *S, VariantKind K) : Sym(S), Kind(K) {} +public: + static X86MCTargetExpr *Create(const MCSymbol *Sym, VariantKind K, + MCContext &Ctx); + + void PrintImpl(raw_ostream &OS) const; + bool EvaluateAsRelocatableImpl(MCValue &Res) const; +}; + +} // end namespace llvm + +#endif diff --git a/lib/Target/X86/X86TargetObjectFile.cpp b/lib/Target/X86/X86TargetObjectFile.cpp index a8faafd4b5..9b7d5d2388 100644 --- a/lib/Target/X86/X86TargetObjectFile.cpp +++ b/lib/Target/X86/X86TargetObjectFile.cpp @@ -8,9 +8,9 @@ //===----------------------------------------------------------------------===// #include "X86TargetObjectFile.h" +#include "X86MCTargetExpr.h" #include "llvm/CodeGen/MachineModuleInfoImpls.h" #include "llvm/MC/MCContext.h" -#include "llvm/MC/MCExpr.h" #include "llvm/Target/Mangler.h" #include "llvm/ADT/SmallString.h" using namespace llvm; @@ -57,9 +57,9 @@ getSymbolForDwarfGlobalReference(const GlobalValue *GV, Mangler *Mang, SmallString<128> Name; Mang->getNameWithPrefix(Name, GV, false); - Name += "@GOTPCREL"; + const MCSymbol *Sym = getContext().CreateSymbol(Name); const MCExpr *Res = - MCSymbolRefExpr::Create(Name.str(), getContext()); + X86MCTargetExpr::Create(Sym, X86MCTargetExpr::GOTPCREL, getContext()); const MCExpr *Four = MCConstantExpr::Create(4, getContext()); return MCBinaryExpr::CreateAdd(Res, Four, getContext()); } |