mirror of
https://github.com/c64scene-ar/llvm-6502.git
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feb95cc7e3
Fixed small bug. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53908 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
3.3 KiB
C++
105 lines
3.3 KiB
C++
//===-- MipsTargetAsmInfo.cpp - Mips asm properties -------------*- C++ -*-===//
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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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//
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// This file contains the declarations of the MipsTargetAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "MipsTargetAsmInfo.h"
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#include "MipsTargetMachine.h"
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using namespace llvm;
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MipsTargetAsmInfo::MipsTargetAsmInfo(const MipsTargetMachine &TM):
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ELFTargetAsmInfo(TM) {
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MipsTM = &TM;
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AlignmentIsInBytes = false;
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COMMDirectiveTakesAlignment = true;
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Data16bitsDirective = "\t.half\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = NULL;
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PrivateGlobalPrefix = "$";
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JumpTableDataSection = "\t.rdata";
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CommentString = "#";
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ReadOnlySection = "\t.rdata";
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ZeroDirective = "\t.space\t";
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BSSSection = "\t.section\t.bss";
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LCOMMDirective = "\t.lcomm\t";
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CStringSection = ".rodata.str";
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if (!TM.getSubtarget<MipsSubtarget>().hasABICall())
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JumpTableDirective = "\t.word\t";
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else
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JumpTableDirective = "\t.gpword\t";
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SmallDataSection = getNamedSection("\t.sdata", SectionFlags::Writeable);
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SmallBSSSection = getNamedSection("\t.sbss",
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SectionFlags::Writeable | SectionFlags::BSS);
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}
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static bool isSuitableForBSS(const GlobalVariable *GV) {
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if (!GV->hasInitializer())
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return true;
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// Leave constant zeros in readonly constant sections, so they can be shared
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Constant *C = GV->getInitializer();
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return (C->isNullValue() && !GV->isConstant() && !NoZerosInBSS);
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}
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SectionKind::Kind
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MipsTargetAsmInfo::SectionKindForGlobal(const GlobalValue *GV) const {
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const TargetData *TD = ETM->getTargetData();
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const GlobalVariable *GVA = dyn_cast<GlobalVariable>(GV);
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if (!GVA)
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return ELFTargetAsmInfo::SectionKindForGlobal(GV);
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// if this is a internal constant string, there is a special
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// section for it, but not in small data/bss.
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if (GVA->hasInitializer() && GV->hasInternalLinkage()) {
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Constant *C = GVA->getInitializer();
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const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
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if (CVA && CVA->isCString())
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return ELFTargetAsmInfo::SectionKindForGlobal(GV);
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}
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const Type *Ty = GV->getType()->getElementType();
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unsigned Size = TD->getABITypeSize(Ty);
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unsigned Threshold =
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MipsTM->getSubtarget<MipsSubtarget>().getSSectionThreshold();
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if (Size > 0 && Size <= Threshold) {
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if (isSuitableForBSS(GVA))
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return SectionKind::SmallBSS;
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else
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return SectionKind::SmallData;
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}
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return ELFTargetAsmInfo::SectionKindForGlobal(GV);
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}
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const Section*
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MipsTargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV) const {
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SectionKind::Kind K = SectionKindForGlobal(GV);
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const GlobalVariable *GVA = dyn_cast<GlobalVariable>(GV);
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if (GVA && (!GVA->isWeakForLinker()))
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switch (K) {
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case SectionKind::SmallData:
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return getSmallDataSection();
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case SectionKind::SmallBSS:
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return getSmallBSSSection();
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default: break;
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}
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return ELFTargetAsmInfo::SelectSectionForGlobal(GV);
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}
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