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Properly support cstrings 

llvm-svn: 33629
This commit is contained in:
Nate Begeman 2007-01-29 21:20:42 +00:00
parent d1154860a4
commit 2a562ba47b
2 changed files with 16 additions and 5 deletions
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10
llvm/include/llvm/CodeGen/MachOWriter.h
View File

@ -14,6 +14,7 @@
#ifndef LLVM_CODEGEN_MACHOWRITER_H
#define LLVM_CODEGEN_MACHOWRITER_H
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRelocation.h"
@ -486,8 +487,13 @@ namespace llvm {
MachOSection *getDataSection() {
return getSection("__DATA", "__data");
}
MachOSection *getConstSection(const Type *Ty) {
// FIXME: support cstring literals and pointer literal
MachOSection *getConstSection(Constant *C) {
const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
if (CVA && CVA->isCString())
return getSection("__TEXT", "__cstring",
MachOSection::S_CSTRING_LITERALS);
const Type *Ty = C->getType();
if (Ty->isPrimitiveType() || Ty->isInteger()) {
unsigned Size = TM.getTargetData()->getTypeSize(Ty);
switch(Size) {

11
llvm/lib/CodeGen/MachOWriter.cpp
View File

@ -245,7 +245,7 @@ void MachOCodeEmitter::emitConstantPool(MachineConstantPool *MCP) {
const Type *Ty = CP[i].getType();
unsigned Size = TM.getTargetData()->getTypeSize(Ty);
MachOWriter::MachOSection *Sec = MOW.getConstSection(Ty);
MachOWriter::MachOSection *Sec = MOW.getConstSection(CP[i].Val.ConstVal);
OutputBuffer SecDataOut(Sec->SectionData, is64Bit, isLittleEndian);
CPLocations.push_back(Sec->SectionData.size());
@ -390,7 +390,8 @@ void MachOWriter::EmitGlobal(GlobalVariable *GV) {
// Scalar read-only data goes in a literal section if the scalar is 4, 8, or
// 16 bytes, or a cstring. Other read only data goes into a regular const
// section. Read-write data goes in the data section.
MachOSection *Sec = GV->isConstant() ? getConstSection(Ty) : getDataSection();
MachOSection *Sec = GV->isConstant() ? getConstSection(GV->getInitializer()) :
getDataSection();
AddSymbolToSection(Sec, GV);
InitMem(GV->getInitializer(), &Sec->SectionData[0], GVOffset[GV],
TM.getTargetData(), Sec->Relocations);
@ -716,7 +717,11 @@ void MachOWriter::CalculateRelocations(MachOSection &MOS) {
intptr_t Offset = GVOffset[GV];
Scattered = TargetSection != 0;
assert(MOSPtr && "Trying to relocate unknown global!");
if (!MOSPtr) {
cerr << "Trying to relocate unknown global " << *GV << '\n';
continue;
//abort();
}
TargetSection = MOSPtr->Index;
MR.setResultPointer((void*)Offset);