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simplify and genericize this code 

llvm-svn: 24473
This commit is contained in:
Chris Lattner 2005-11-21 19:50:31 +00:00
parent 8edbf805d7
commit 7df25ab429
1 changed files with 69 additions and 55 deletions
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124
llvm/lib/Target/X86/X86AsmPrinter.cpp
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@ -40,8 +40,9 @@ AsmWriterFlavor("x86-asm-syntax",
/// doInitialization
bool X86SharedAsmPrinter::doInitialization(Module& M) {
bool leadingUnderscore = false;
forCygwin = false;
forDarwin = false;
bool forWin32 = false;
const std::string& TT = M.getTargetTriple();
if (TT.length() > 5) {
forCygwin = TT.find("cygwin") != std::string::npos ||
@ -53,23 +54,26 @@ bool X86SharedAsmPrinter::doInitialization(Module& M) {
#elif defined(__APPLE__)
forDarwin = true;
#elif defined(_WIN32)
leadingUnderscore = true;
#else
leadingUnderscore = false;
forWin32 = true;
#endif
}
if (leadingUnderscore || forCygwin || forDarwin)
GlobalPrefix = "_";
if (forDarwin) {
AlignmentIsInBytes = false;
GlobalPrefix = "_";
Data64bitsDirective = 0; // we can't emit a 64-bit unit
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
ConstantPoolSection = "\t.const\n";
}
LCOMMDirective = "\t.lcomm\t";
COMMDirectiveTakesAlignment = false;
} else if (forCygwin) {
GlobalPrefix = "_";
COMMDirectiveTakesAlignment = false;
} else if (forWin32) {
GlobalPrefix = "_";
}
return AsmPrinter::doInitialization(M);
}
@ -86,55 +90,65 @@ bool X86SharedAsmPrinter::doFinalization(Module &M) {
unsigned Size = TD.getTypeSize(C->getType());
unsigned Align = TD.getTypeAlignmentShift(C->getType());
if (C->isNullValue() &&
(I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
I->hasWeakLinkage() /* FIXME: Verify correct */)) {
SwitchSection(".data", I);
if (!forCygwin && !forDarwin && I->hasInternalLinkage())
O << "\t.local " << name << "\n";
if (forDarwin && I->hasInternalLinkage())
O << "\t.lcomm " << name << "," << Size << "," << Align;
else
O << "\t.comm " << name << "," << Size;
if (!forCygwin && !forDarwin)
O << "," << (1 << Align);
O << "\t\t# ";
WriteAsOperand(O, I, true, true, &M);
O << "\n";
} else {
switch (I->getLinkage()) {
default: assert(0 && "Unknown linkage type!");
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
SwitchSection("", I);
break;
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of
// their name or something. For now, just emit them as external.
case GlobalValue::ExternalLinkage:
// If external or appending, declare as a global symbol
O << "\t.globl " << name << "\n";
// FALL THROUGH
case GlobalValue::InternalLinkage:
SwitchSection(C->isNullValue() ? ".bss" : ".data", I);
break;
switch (I->getLinkage()) {
default: assert(0 && "Unknown linkage type!");
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
if (C->isNullValue()) {
O << COMMDirective << name << "," << Size;
if (COMMDirectiveTakesAlignment)
O << "," << (1 << Align);
O << "\t\t# ";
WriteAsOperand(O, I, true, true, &M);
O << "\n";
continue;
}
EmitAlignment(Align);
if (!forCygwin && !forDarwin) {
O << "\t.type " << name << ",@object\n";
O << "\t.size " << name << "," << Size << "\n";
// Nonnull linkonce -> weak
O << "\t.weak " << name << "\n";
O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
SwitchSection("", I);
break;
case GlobalValue::InternalLinkage:
if (C->isNullValue()) {
if (LCOMMDirective) {
O << LCOMMDirective << name << "," << Size << "," << Align;
continue;
} else {
SwitchSection(".bss", I);
O << "\t.local " << name << "\n";
O << COMMDirective << name << "," << Size;
if (COMMDirectiveTakesAlignment)
O << "," << (1 << Align);
O << "\t\t# ";
WriteAsOperand(O, I, true, true, &M);
O << "\n";
continue;
}
}
O << name << ":\t\t\t\t# ";
WriteAsOperand(O, I, true, true, &M);
O << " = ";
WriteAsOperand(O, C, false, false, &M);
O << "\n";
EmitGlobalConstant(C);
SwitchSection(C->isNullValue() ? ".bss" : ".data", I);
break;
case GlobalValue::AppendingLinkage:
// FIXME: appending linkage variables should go into a section of
// their name or something. For now, just emit them as external.
case GlobalValue::ExternalLinkage:
SwitchSection(C->isNullValue() ? ".bss" : ".data", I);
// If external or appending, declare as a global symbol
O << "\t.globl " << name << "\n";
break;
}
EmitAlignment(Align);
if (!forCygwin && !forDarwin) {
O << "\t.type " << name << ",@object\n";
O << "\t.size " << name << "," << Size << "\n";
}
O << name << ":\t\t\t\t# ";
WriteAsOperand(O, I, true, true, &M);
O << " = ";
WriteAsOperand(O, C, false, false, &M);
O << "\n";
EmitGlobalConstant(C);
}
if (forDarwin) {