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just finish MCizing FnStubInfo which cleans it up and simplifies it.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93334 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-01-13 19:13:16 +00:00
parent 59b34fe55f
commit 656bb20d61
1 changed files with 33 additions and 48 deletions
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81
lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
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@ -59,57 +59,42 @@ namespace {
class PPCAsmPrinter : public AsmPrinter {
protected:
struct FnStubInfo {
std::string StubName, LazyPtrName, AnonSymbolName;
MCSymbol *StubSym, *LazyPtrSym, *AnonSymbolSym;
MCSymbol *Stub, *LazyPtr, *AnonSymbol;
FnStubInfo() {
StubSym = LazyPtrSym = AnonSymbolSym = 0;
Stub = LazyPtr = AnonSymbol = 0;
}
void Init(const GlobalValue *GV, Mangler *Mang) {
void Init(const GlobalValue *GV, Mangler *Mang, MCContext &Ctx) {
// Already initialized.
if (!StubName.empty()) return;
if (Stub != 0) return;
// Get the names.
StubName = Mang->getMangledName(GV, "$stub", true);
LazyPtrName = Mang->getMangledName(GV, "$lazy_ptr", true);
AnonSymbolName = Mang->getMangledName(GV, "$stub$tmp", true);
SmallString<128> TmpStr;
Mang->getNameWithPrefix(TmpStr, GV, true);
MakeSymbols(TmpStr, Ctx);
}
void Init(StringRef GVName, Mangler *Mang, MCContext &Ctx) {
assert(!GVName.empty());
if (StubSym != 0) return; // Already initialized.
assert(!GVName.empty() && "external symbol name shouldn't be empty");
if (Stub != 0) return; // Already initialized.
// Get the names for the external symbol name.
SmallString<128> TmpStr;
Mang->getNameWithPrefix(TmpStr, GVName + "$stub", Mangler::Private);
StubSym = Ctx.GetOrCreateSymbol(TmpStr.str());
Mang->getNameWithPrefix(TmpStr, GVName, Mangler::Private);
MakeSymbols(TmpStr, Ctx);
}
void MakeSymbols(SmallString<128> &TmpStr, MCContext &Ctx) {
TmpStr += "$stub";
Stub = Ctx.GetOrCreateSymbol(TmpStr.str());
TmpStr.erase(TmpStr.end()-5, TmpStr.end()); // Remove $stub
TmpStr += "$lazy_ptr";
LazyPtrSym = Ctx.GetOrCreateSymbol(TmpStr.str());
LazyPtr = Ctx.GetOrCreateSymbol(TmpStr.str());
TmpStr.erase(TmpStr.end()-9, TmpStr.end()); // Remove $lazy_ptr
TmpStr += "$stub$tmp";
AnonSymbolSym = Ctx.GetOrCreateSymbol(TmpStr.str());
}
void printStub(raw_ostream &OS, const MCAsmInfo *MAI) const {
if (StubSym)
StubSym->print(OS, MAI);
else
OS << StubName;
}
void printLazyPtr(raw_ostream &OS, const MCAsmInfo *MAI) const {
if (LazyPtrSym)
LazyPtrSym->print(OS, MAI);
else
OS << LazyPtrName;
}
void printAnonSymbol(raw_ostream &OS, const MCAsmInfo *MAI) const {
if (AnonSymbolSym)
AnonSymbolSym->print(OS, MAI);
else
OS << AnonSymbolName;
AnonSymbol = Ctx.GetOrCreateSymbol(TmpStr.str());
}
};
@ -256,8 +241,8 @@ namespace {
if (GV->isDeclaration() || GV->isWeakForLinker()) {
// Dynamically-resolved functions need a stub for the function.
FnStubInfo &FnInfo = FnStubs[Mang->getMangledName(GV)];
FnInfo.Init(GV, Mang);
FnInfo.printStub(O, MAI);
FnInfo.Init(GV, Mang, OutContext);
FnInfo.Stub->print(O, MAI);
return;
}
}
@ -266,7 +251,7 @@ namespace {
Mang->getNameWithPrefix(MangledName, MO.getSymbolName());
FnStubInfo &FnInfo = FnStubs[MangledName.str()];
FnInfo.Init(MO.getSymbolName(), Mang, OutContext);
FnInfo.printStub(O, MAI);
FnInfo.Stub->print(O, MAI);
return;
}
}
@ -1076,32 +1061,32 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
const FnStubInfo &Info = I->second;
Info.printStub(O, MAI);
Info.Stub->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << "\tmflr r0\n";
O << "\tbcl 20,31,";
Info.printAnonSymbol(O, MAI);
Info.AnonSymbol->print(O, MAI);
O << '\n';
Info.printAnonSymbol(O, MAI);
Info.AnonSymbol->print(O, MAI);
O << ":\n";
O << "\tmflr r11\n";
O << "\taddis r11,r11,ha16(";
Info.printLazyPtr(O, MAI);
Info.LazyPtr->print(O, MAI);
O << '-';
Info.printAnonSymbol(O, MAI);
Info.AnonSymbol->print(O, MAI);
O << ")\n";
O << "\tmtlr r0\n";
O << (isPPC64 ? "\tldu" : "\tlwzu") << " r12,lo16(";
Info.printLazyPtr(O, MAI);
Info.LazyPtr->print(O, MAI);
O << '-';
Info.printAnonSymbol(O, MAI);
Info.AnonSymbol->print(O, MAI);
O << ")(r11)\n";
O << "\tmtctr r12\n";
O << "\tbctr\n";
OutStreamer.SwitchSection(LSPSection);
Info.printLazyPtr(O, MAI);
Info.LazyPtr->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << (isPPC64 ? "\t.quad" : "\t.long") << " dyld_stub_binding_helper\n";
@ -1118,19 +1103,19 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
const FnStubInfo &Info = I->second;
Info.printStub(O, MAI);
Info.Stub->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << "\tlis r11,ha16(";
Info.printLazyPtr(O, MAI);
Info.LazyPtr->print(O, MAI);
O << ")\n";
O << (isPPC64 ? "\tldu" : "\tlwzu") << " r12,lo16(";
Info.printLazyPtr(O, MAI);
Info.LazyPtr->print(O, MAI);
O << ")(r11)\n";
O << "\tmtctr r12\n";
O << "\tbctr\n";
OutStreamer.SwitchSection(LSPSection);
Info.printLazyPtr(O, MAI);
Info.LazyPtr->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << (isPPC64 ? "\t.quad" : "\t.long") << " dyld_stub_binding_helper\n";