f785676f2a
all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month
62 lines
2.5 KiB
C++
62 lines
2.5 KiB
C++
//===-- MCELFObjectTargetWriter.cpp - ELF Target Writer Subclass ----------===//
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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 "llvm/ADT/STLExtras.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCValue.h"
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using namespace llvm;
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MCELFObjectTargetWriter::MCELFObjectTargetWriter(bool Is64Bit_,
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uint8_t OSABI_,
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uint16_t EMachine_,
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bool HasRelocationAddend_,
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bool IsN64_)
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: OSABI(OSABI_), EMachine(EMachine_),
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HasRelocationAddend(HasRelocationAddend_), Is64Bit(Is64Bit_),
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IsN64(IsN64_){
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}
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const MCSymbol *MCELFObjectTargetWriter::ExplicitRelSym(const MCAssembler &Asm,
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const MCValue &Target,
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const MCFragment &F,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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return NULL;
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}
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const MCSymbol *MCELFObjectTargetWriter::undefinedExplicitRelSym(const MCValue &Target,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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const MCSymbol &Symbol = Target.getSymA()->getSymbol();
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return &Symbol.AliasedSymbol();
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}
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// ELF doesn't require relocations to be in any order. We sort by the r_offset,
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// just to match gnu as for easier comparison. The use type and index is an
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// arbitrary way of making the sort deterministic.
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static int cmpRel(const ELFRelocationEntry *AP, const ELFRelocationEntry *BP) {
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const ELFRelocationEntry &A = *AP;
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const ELFRelocationEntry &B = *BP;
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if (A.r_offset != B.r_offset)
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return B.r_offset - A.r_offset;
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if (B.Type != A.Type)
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return A.Type - B.Type;
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if (B.Index != A.Index)
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return B.Index - A.Index;
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llvm_unreachable("ELFRelocs might be unstable!");
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}
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void
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MCELFObjectTargetWriter::sortRelocs(const MCAssembler &Asm,
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std::vector<ELFRelocationEntry> &Relocs) {
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array_pod_sort(Relocs.begin(), Relocs.end(), cmpRel);
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}
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