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Print % signs before register names; turn off "noprefix" mode in gas output.

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Fixes test case test/Programs/LLVMSource/2003-08-03-ReservedWordGlobal.ll.

Also: Refactor implicit-uses printing into its own method.
Remove a couple of unused variables.

llvm-svn: 7737
This commit is contained in:
Brian Gaeke 2003-08-11 19:05:46 +00:00
parent 7efc8c6584
commit e599cf3856
1 changed files with 31 additions and 16 deletions
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47
lib/Target/X86/Printer.cpp
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@ -55,6 +55,7 @@ namespace {
return "X86 Assembly Printer";
}
void checkImplUses (const TargetInstrDescriptor &Desc);
void printMachineInstruction(const MachineInstr *MI);
void printOp(const MachineOperand &MO,
bool elideOffsetKeyword = false);
@ -441,6 +442,8 @@ static bool isMem(const MachineInstr *MI, unsigned Op) {
MI->getOperand(Op+2).isRegister() &&MI->getOperand(Op+3).isImmediate();
}
void Printer::printOp(const MachineOperand &MO,
bool elideOffsetKeyword /* = false */) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
@ -453,7 +456,8 @@ void Printer::printOp(const MachineOperand &MO,
// FALLTHROUGH
case MachineOperand::MO_MachineRegister:
if (MO.getReg() < MRegisterInfo::FirstVirtualRegister)
O << RI.get(MO.getReg()).Name;
// Bug Workaround: See note in Printer::doInitialization about %.
O << "%" << RI.get(MO.getReg()).Name;
else
O << "%reg" << MO.getReg();
return;
@ -497,7 +501,6 @@ static const std::string sizePtr(const TargetInstrDescriptor &Desc) {
}
void Printer::printMemReference(const MachineInstr *MI, unsigned Op) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
assert(isMem(MI, Op) && "Invalid memory reference!");
if (MI->getOperand(Op).isFrameIndex()) {
@ -548,6 +551,19 @@ void Printer::printMemReference(const MachineInstr *MI, unsigned Op) {
O << "]";
}
/// checkImplUses - Emit the implicit-use registers for the
/// instruction described by DESC, if its PrintImplUses flag is set.
///
void Printer::checkImplUses (const TargetInstrDescriptor &Desc) {
const MRegisterInfo &RI = *TM.getRegisterInfo();
if (Desc.TSFlags & X86II::PrintImplUses) {
for (const unsigned *p = Desc.ImplicitUses; *p; ++p) {
// Bug Workaround: See note in Printer::doInitialization about %.
O << ", %" << RI.get(*p).Name;
}
}
}
/// printMachineInstruction -- Print out a single X86 LLVM instruction
/// MI in Intel syntax to the current output stream.
///
@ -555,7 +571,6 @@ void Printer::printMachineInstruction(const MachineInstr *MI) {
unsigned Opcode = MI->getOpcode();
const TargetInstrInfo &TII = TM.getInstrInfo();
const TargetInstrDescriptor &Desc = TII.get(Opcode);
const MRegisterInfo &RI = *TM.getRegisterInfo();
switch (Desc.TSFlags & X86II::FormMask) {
case X86II::Pseudo:
@ -647,11 +662,7 @@ void Printer::printMachineInstruction(const MachineInstr *MI) {
O << ", ";
printOp(MI->getOperand(1));
}
if (Desc.TSFlags & X86II::PrintImplUses) {
for (const unsigned *p = Desc.ImplicitUses; *p; ++p) {
O << ", " << RI.get(*p).Name;
}
}
checkImplUses(Desc);
O << "\n";
return;
}
@ -782,11 +793,7 @@ void Printer::printMachineInstruction(const MachineInstr *MI) {
O << ", ";
printOp(MI->getOperand(MI->getNumOperands()-1));
}
if (Desc.TSFlags & X86II::PrintImplUses) {
for (const unsigned *p = Desc.ImplicitUses; *p; ++p) {
O << ", " << RI.get(*p).Name;
}
}
checkImplUses(Desc);
O << "\n";
return;
@ -898,9 +905,17 @@ void Printer::printMachineInstruction(const MachineInstr *MI) {
bool Printer::doInitialization(Module &M)
{
// Tell gas we are outputting Intel syntax (not AT&T syntax) assembly,
// with no % decorations on register names.
O << "\t.intel_syntax noprefix\n";
// Tell gas we are outputting Intel syntax (not AT&T syntax)
// assembly.
//
// Bug: gas in `intel_syntax noprefix' mode interprets the symbol
// `Sp' in an instruction as a reference to the register named sp,
// and if you try to reference a symbol `Sp' (e.g. `mov ECX, OFFSET
// Sp') then it gets lowercased before being looked up in the symbol
// table. This creates spurious `undefined symbol' errors when
// linking. Workaround: Do not use `noprefix' mode, and decorate all
// register names with percent signs.
O << "\t.intel_syntax\n";
Mang = new Mangler(M);
return false; // success
}