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Eliminate textual section switching from the x86 backend, one
more step towards "semantics sections" git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78002 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -26,7 +26,6 @@ namespace llvm {
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class Mangler;
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class TargetMachine;
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class TargetLoweringObjectFile {
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MCContext *Ctx;
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protected:
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@ -250,6 +249,11 @@ public:
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/// FIXME: REMOVE this (rdar://7071300)
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virtual bool shouldEmitUsedDirectiveFor(const GlobalValue *GV,
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Mangler *) const;
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/// getMachOSection - Return the MCSection for the specified mach-o section.
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/// FIXME: Switch this to a semantic view eventually.
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const MCSection *getMachOSection(const char *Name, bool isDirective,
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SectionKind K);
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};
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@ -264,6 +268,11 @@ public:
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virtual const MCSection *
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SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler *Mang, const TargetMachine &TM) const;
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/// getCOFFSection - Return the MCSection for the specified COFF section.
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/// FIXME: Switch this to a semantic view eventually.
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const MCSection *getCOFFSection(const char *Name, bool isDirective,
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SectionKind K);
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};
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} // end namespace llvm
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@ -532,6 +532,14 @@ getSectionForConstant(SectionKind Kind) const {
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// MachO
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//===----------------------------------------------------------------------===//
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const MCSection *TargetLoweringObjectFileMachO::
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getMachOSection(const char *Name, bool isDirective, SectionKind K) {
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// FOR NOW, Just forward.
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return getOrCreateSection(Name, isDirective, K);
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}
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void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
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const TargetMachine &TM) {
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TargetLoweringObjectFile::Initialize(Ctx, TM);
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@ -733,6 +741,11 @@ shouldEmitUsedDirectiveFor(const GlobalValue *GV, Mangler *Mang) const {
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// COFF
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//===----------------------------------------------------------------------===//
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const MCSection *TargetLoweringObjectFileCOFF::
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getCOFFSection(const char *Name, bool isDirective, SectionKind K) {
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return getOrCreateSection(Name, isDirective, K);
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}
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void TargetLoweringObjectFileCOFF::Initialize(MCContext &Ctx,
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const TargetMachine &TM) {
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TargetLoweringObjectFile::Initialize(Ctx, TM);
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@ -899,8 +899,9 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
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}
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if (Subtarget->isTargetDarwin()) {
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//TargetLoweringObjectFileMachO &TLOFMacho =
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// static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
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// All darwin targets use mach-o.
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TargetLoweringObjectFileMachO &TLOFMacho =
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static_cast<TargetLoweringObjectFileMachO &>(getObjFileLowering());
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// Add the (possibly multiple) personalities to the set of global value
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// stubs. Only referenced functions get into the Personalities list.
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@ -916,8 +917,11 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
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// Output stubs for dynamically-linked functions
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if (!FnStubs.empty()) {
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SwitchToDataSection("\t.section __IMPORT,__jump_table,symbol_stubs,"
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"self_modifying_code+pure_instructions,5", 0);
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const MCSection *TheSection =
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TLOFMacho.getMachOSection("\t.section __IMPORT,__jump_table,symbol_stubs,"
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"self_modifying_code+pure_instructions,5", true,
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SectionKind::getMetadata());
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SwitchToSection(TheSection);
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for (StringMap<std::string>::iterator I = FnStubs.begin(),
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E = FnStubs.end(); I != E; ++I)
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O << I->getKeyData() << ":\n" << "\t.indirect_symbol " << I->second
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@ -927,8 +931,11 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
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// Output stubs for external and common global variables.
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if (!GVStubs.empty()) {
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SwitchToDataSection(
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"\t.section __IMPORT,__pointers,non_lazy_symbol_pointers");
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const MCSection *TheSection =
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TLOFMacho.getMachOSection("\t.section __IMPORT,__pointers,"
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"non_lazy_symbol_pointers", true,
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SectionKind::getMetadata());
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SwitchToSection(TheSection);
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for (StringMap<std::string>::iterator I = GVStubs.begin(),
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E = GVStubs.end(); I != E; ++I)
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O << I->getKeyData() << ":\n\t.indirect_symbol "
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@ -963,16 +970,17 @@ bool X86ATTAsmPrinter::doFinalization(Module &M) {
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// Output linker support code for dllexported globals on windows.
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if (!DLLExportedGVs.empty()) {
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SwitchToDataSection(".section .drectve");
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if (!DLLExportedGVs.empty() || !DLLExportedFns.empty()) {
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// dllexport symbols only exist on coff targets.
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TargetLoweringObjectFileCOFF &TLOFMacho =
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static_cast<TargetLoweringObjectFileCOFF&>(getObjFileLowering());
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SwitchToSection(TLOFMacho.getCOFFSection(".section .drectve", true,
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SectionKind::getMetadata()));
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for (StringSet<>::iterator i = DLLExportedGVs.begin(),
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e = DLLExportedGVs.end(); i != e; ++i)
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O << "\t.ascii \" -export:" << i->getKeyData() << ",data\"\n";
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}
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if (!DLLExportedFns.empty()) {
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SwitchToDataSection(".section .drectve");
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for (StringSet<>::iterator i = DLLExportedFns.begin(),
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e = DLLExportedFns.end();
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