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use symbols instead of strings, eliminating a bunch of getMangledName 

calls.  Add FIXMEs about a bunch of nondeterminism in stub output.

llvm-svn: 93621
This commit is contained in:
Chris Lattner 2010-01-16 02:00:23 +00:00
parent e4e85a4e75
commit 1e26ec35d7
1 changed files with 55 additions and 39 deletions
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94
llvm/lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
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@ -94,8 +94,8 @@ namespace {
}
};
StringMap<FnStubInfo> FnStubs;
StringMap<std::string> GVStubs, HiddenGVStubs, TOC;
DenseMap<const MCSymbol*, FnStubInfo> FnStubs;
StringMap<const MCSymbol*> GVStubs, HiddenGVStubs, TOC;
const PPCSubtarget &Subtarget;
uint64_t LabelID;
public:
@ -236,16 +236,15 @@ namespace {
GlobalValue *GV = MO.getGlobal();
if (GV->isDeclaration() || GV->isWeakForLinker()) {
// Dynamically-resolved functions need a stub for the function.
FnStubInfo &FnInfo = FnStubs[Mang->getMangledName(GV)];
FnStubInfo &FnInfo = FnStubs[GetGlobalValueSymbol(GV)];
FnInfo.Init(GV, this);
FnInfo.Stub->print(O, MAI);
return;
}
}
if (MO.getType() == MachineOperand::MO_ExternalSymbol) {
SmallString<128> MangledName;
Mang->getNameWithPrefix(MangledName, MO.getSymbolName());
FnStubInfo &FnInfo = FnStubs[MangledName.str()];
FnStubInfo &FnInfo =
FnStubs[GetExternalSymbolSymbol(MO.getSymbolName())];
FnInfo.Init(MO.getSymbolName(), Mang, OutContext);
FnInfo.Stub->print(O, MAI);
return;
@ -339,16 +338,13 @@ namespace {
std::string Name = Mang->getMangledName(GV);
// Map symbol -> label of TOC entry.
if (TOC.count(Name) == 0) {
std::string Label;
Label += MAI->getPrivateGlobalPrefix();
Label += "C";
Label += utostr(LabelID++);
if (TOC.count(Name) == 0)
TOC[Name] = OutContext.
GetOrCreateSymbol(StringRef(MAI->getPrivateGlobalPrefix()) + "C" +
Twine(LabelID++));
TOC[Name] = Label;
}
O << TOC[Name] << "@toc";
TOC[Name]->print(O, MAI);
O << "@toc";
}
void printPredicateOperand(const MachineInstr *MI, unsigned OpNo,
@ -438,7 +434,9 @@ void PPCAsmPrinter::printOp(const MachineOperand &MO) {
Name += MO.getSymbolName();
if (TM.getRelocationModel() != Reloc::Static) {
GVStubs[Name] = Name+"$non_lazy_ptr";
GVStubs[Name] =
OutContext.GetOrCreateSymbol(StringRef(MAI->getGlobalPrefix())+
MO.getSymbolName()+"$non_lazy_ptr");
Name += "$non_lazy_ptr";
}
O << Name;
@ -447,25 +445,27 @@ void PPCAsmPrinter::printOp(const MachineOperand &MO) {
case MachineOperand::MO_GlobalAddress: {
// Computing the address of a global symbol, not calling it.
GlobalValue *GV = MO.getGlobal();
std::string Name;
MCSymbol *SymToPrint;
// External or weakly linked global variables need non-lazily-resolved stubs
if (TM.getRelocationModel() != Reloc::Static &&
(GV->isDeclaration() || GV->isWeakForLinker())) {
if (!GV->hasHiddenVisibility()) {
Name = Mang->getMangledName(GV, "$non_lazy_ptr", true);
GVStubs[Mang->getMangledName(GV)] = Name;
SymToPrint = GetPrivateGlobalValueSymbolStub(GV, "$non_lazy_ptr");
GVStubs[Mang->getMangledName(GV)] = SymToPrint;
} else if (GV->isDeclaration() || GV->hasCommonLinkage() ||
GV->hasAvailableExternallyLinkage()) {
Name = Mang->getMangledName(GV, "$non_lazy_ptr", true);
HiddenGVStubs[Mang->getMangledName(GV)] = Name;
SymToPrint = GetPrivateGlobalValueSymbolStub(GV, "$non_lazy_ptr");
HiddenGVStubs[Mang->getMangledName(GV)] = SymToPrint;
GetGlobalValueSymbol(GV)->print(O, MAI);
} else {
Name = Mang->getMangledName(GV);
SymToPrint = GetGlobalValueSymbol(GV);
}
} else {
Name = Mang->getMangledName(GV);
SymToPrint = GetGlobalValueSymbol(GV);
}
O << Name;
SymToPrint->print(O, MAI);
printOffset(MO.getOffset());
return;
@ -827,9 +827,11 @@ bool PPCLinuxAsmPrinter::doFinalization(Module &M) {
// FIXME 64-bit SVR4: Use MCSection here?
O << "\t.section\t\".toc\",\"aw\"\n";
for (StringMap<std::string>::iterator I = TOC.begin(), E = TOC.end();
// FIXME: This is nondeterminstic!
for (StringMap<const MCSymbol*>::iterator I = TOC.begin(), E = TOC.end();
I != E; ++I) {
O << I->second << ":\n";
I->second->print(O, MAI);
O << ":\n";
O << "\t.tc " << I->getKeyData() << "[TC]," << I->getKeyData() << '\n';
}
}
@ -1110,14 +1112,17 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
MCSectionMachO::S_SYMBOL_STUBS |
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
32, SectionKind::getText());
for (StringMap<FnStubInfo>::iterator I = FnStubs.begin(), E = FnStubs.end();
I != E; ++I) {
// FIXME: This is emitting in nondeterminstic order!
for (DenseMap<const MCSymbol*, FnStubInfo>::iterator I =
FnStubs.begin(), E = FnStubs.end(); I != E; ++I) {
OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
const FnStubInfo &Info = I->second;
Info.Stub->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << "\t.indirect_symbol ";
I->first->print(O, MAI);
O << '\n';
O << "\tmflr r0\n";
O << "\tbcl 20,31,";
Info.AnonSymbol->print(O, MAI);
@ -1142,7 +1147,9 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
OutStreamer.SwitchSection(LSPSection);
Info.LazyPtr->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << "\t.indirect_symbol ";
I->first->print(O, MAI);
O << '\n';
O << (isPPC64 ? "\t.quad" : "\t.long") << " dyld_stub_binding_helper\n";
}
} else if (!FnStubs.empty()) {
@ -1152,14 +1159,17 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
16, SectionKind::getText());
for (StringMap<FnStubInfo>::iterator I = FnStubs.begin(), E = FnStubs.end();
I != E; ++I) {
// FIXME: This is emitting in nondeterminstic order!
for (DenseMap<const MCSymbol*, FnStubInfo>::iterator I = FnStubs.begin(),
E = FnStubs.end(); I != E; ++I) {
OutStreamer.SwitchSection(StubSection);
EmitAlignment(4);
const FnStubInfo &Info = I->second;
Info.Stub->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << "\t.indirect_symbol ";
I->first->print(O, MAI);
O << '\n';
O << "\tlis r11,ha16(";
Info.LazyPtr->print(O, MAI);
O << ")\n";
@ -1171,7 +1181,9 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
OutStreamer.SwitchSection(LSPSection);
Info.LazyPtr->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << "\t.indirect_symbol ";
I->first->print(O, MAI);
O << '\n';
O << (isPPC64 ? "\t.quad" : "\t.long") << " dyld_stub_binding_helper\n";
}
}
@ -1186,7 +1198,7 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
E = Personalities.end(); I != E; ++I) {
if (*I)
GVStubs[Mang->getMangledName(*I)] =
Mang->getMangledName(*I, "$non_lazy_ptr", true);
GetPrivateGlobalValueSymbolStub(*I, "$non_lazy_ptr");
}
}
@ -1196,9 +1208,11 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
OutStreamer.SwitchSection(TLOFMacho.getNonLazySymbolPointerSection());
EmitAlignment(isPPC64 ? 3 : 2);
for (StringMap<std::string>::iterator I = GVStubs.begin(),
// FIXME: This is nondeterminstic.
for (StringMap<const MCSymbol *>::iterator I = GVStubs.begin(),
E = GVStubs.end(); I != E; ++I) {
O << I->second << ":\n";
I->second->print(O, MAI);
O << ":\n";
O << "\t.indirect_symbol " << I->getKeyData() << '\n';
O << (isPPC64 ? "\t.quad\t0\n" : "\t.long\t0\n");
}
@ -1207,9 +1221,11 @@ bool PPCDarwinAsmPrinter::doFinalization(Module &M) {
if (!HiddenGVStubs.empty()) {
OutStreamer.SwitchSection(getObjFileLowering().getDataSection());
EmitAlignment(isPPC64 ? 3 : 2);
for (StringMap<std::string>::iterator I = HiddenGVStubs.begin(),
// FIXME: This is nondeterminstic.
for (StringMap<const MCSymbol *>::iterator I = HiddenGVStubs.begin(),
E = HiddenGVStubs.end(); I != E; ++I) {
O << I->second << ":\n";
I->second->print(O, MAI);
O << ":\n";
O << (isPPC64 ? "\t.quad\t" : "\t.long\t") << I->getKeyData() << '\n';
}
}