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Eliminate textual section switching from the x86 backend, one 

more step towards "semantics sections"

llvm-svn: 78002
This commit is contained in:
Chris Lattner 2009-08-03 21:53:27 +00:00
parent 4d93a4f9d4
commit d2c179c8f6
3 changed files with 43 additions and 13 deletions
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11
llvm/include/llvm/Target/TargetLoweringObjectFile.h
View File

@ -26,7 +26,6 @@ namespace llvm {
class Mangler;
class TargetMachine;
class TargetLoweringObjectFile {
MCContext *Ctx;
protected:
@ -250,6 +249,11 @@ public:
/// FIXME: REMOVE this (rdar://7071300)
virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
Mangler *) const;
/// getMachOSection - Return the MCSection for the specified mach-o section.
/// FIXME: Switch this to a semantic view eventually.
const MCSection *getMachOSection(const char *Name, bool isDirective,
SectionKind K);
};
@ -264,6 +268,11 @@ public:
virtual const MCSection *
SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
Mangler *Mang, const TargetMachine &TM) const;
/// getCOFFSection - Return the MCSection for the specified COFF section.
/// FIXME: Switch this to a semantic view eventually.
const MCSection *getCOFFSection(const char *Name, bool isDirective,
SectionKind K);
};
} // end namespace llvm

13
llvm/lib/Target/TargetLoweringObjectFile.cpp
View File

@ -532,6 +532,14 @@ getSectionForConstant(SectionKind Kind) const {
// MachO
//===----------------------------------------------------------------------===//
const MCSection *TargetLoweringObjectFileMachO::
getMachOSection(const char *Name, bool isDirective, SectionKind K) {
// FOR NOW, Just forward.
return getOrCreateSection(Name, isDirective, K);
}
void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
TargetLoweringObjectFile::Initialize(Ctx, TM);
@ -733,6 +741,11 @@ shouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const {
// COFF
//===----------------------------------------------------------------------===//
const MCSection *TargetLoweringObjectFileCOFF::
getCOFFSection(const char *Name, bool isDirective, SectionKind K) {
return getOrCreateSection(Name, isDirective, K);
}
void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
const TargetMachine &TM) {
TargetLoweringObjectFile::Initialize(Ctx, TM);

32
llvm/lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp
View File

@ -899,8 +899,9 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
}
if (Subtarget->isTargetDarwin()) {
//TargetLoweringObjectFileMachO &TLOFMacho =
// static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
// All darwin targets use mach-o.
TargetLoweringObjectFileMachO &TLOFMacho =
static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
// Add the (possibly multiple) personalities to the set of global value
// stubs. Only referenced functions get into the Personalities list.
@ -916,8 +917,11 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
// Output stubs for dynamically-linked functions
if (!FnStubs.empty()) {
SwitchToDataSection("\t.section __IMPORT,__jump_table,symbol_stubs,"
"self_modifying_code+pure_instructions,5", 0);
const MCSection *TheSection =
TLOFMacho.getMachOSection("\t.section __IMPORT,__jump_table,symbol_stubs,"
"self_modifying_code+pure_instructions,5", true,
SectionKind::getMetadata());
SwitchToSection(TheSection);
for (StringMap<std::string>::iterator I = FnStubs.begin(),
E = FnStubs.end(); I != E; ++I)
O << I->getKeyData() << ":\n" << "\t.indirect_symbol " << I->second
@ -927,8 +931,11 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
// Output stubs for external and common global variables.
if (!GVStubs.empty()) {
SwitchToDataSection(
"\t.section __IMPORT,__pointers,non_lazy_symbol_pointers");
const MCSection *TheSection =
TLOFMacho.getMachOSection("\t.section __IMPORT,__pointers,"
"non_lazy_symbol_pointers", true,
SectionKind::getMetadata());
SwitchToSection(TheSection);
for (StringMap<std::string>::iterator I = GVStubs.begin(),
E = GVStubs.end(); I != E; ++I)
O << I->getKeyData() << ":\n\t.indirect_symbol "
@ -963,16 +970,17 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
// Output linker support code for dllexported globals on windows.
if (!DLLExportedGVs.empty()) {
SwitchToDataSection(".section .drectve");
if (!DLLExportedGVs.empty() || !DLLExportedFns.empty()) {
// dllexport symbols only exist on coff targets.
TargetLoweringObjectFileCOFF &TLOFMacho =
static_cast<TargetLoweringObjectFileCOFF&>(getObjFileLowering());
SwitchToSection(TLOFMacho.getCOFFSection(".section .drectve", true,
SectionKind::getMetadata()));
for (StringSet<>::iterator i = DLLExportedGVs.begin(),
e = DLLExportedGVs.end(); i != e; ++i)
O << "\t.ascii \" -export:" << i->getKeyData() << ",data\"\n";
}
if (!DLLExportedFns.empty()) {
SwitchToDataSection(".section .drectve");
for (StringSet<>::iterator i = DLLExportedFns.begin(),
e = DLLExportedFns.end();