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Implement the PPC inline asm "L" modifier. This allows us to compile:

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long long test(long long X) {
  __asm__("foo %0 %L0 %1 %L1" : "=r"(X): "r"(X));
  return X;
}

to:
        foo r2 r3 r2 r3

llvm-svn: 26333
This commit is contained in:
Chris Lattner 2006-02-23 19:31:10 +00:00
parent b4951fbe82
commit cdbd9d6d4c
1 changed files with 28 additions and 4 deletions
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32
lib/Target/PowerPC/PPCAsmPrinter.cpp
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@ -97,10 +97,7 @@ namespace {
}
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode) {
printOperand(MI, OpNo);
return false;
}
unsigned AsmVariant, const char *ExtraCode);
void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo) {
unsigned char value = MI->getOperand(OpNo).getImmedValue();
@ -396,6 +393,33 @@ void PPCAsmPrinter::printOp(const MachineOperand &MO) {
}
}
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool PPCAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true; // Unknown modifier.
switch (ExtraCode[0]) {
default: return true; // Unknown modifier.
case 'L': // Write second word of DImode reference.
// Verify that this operand has two consecutive registers.
if (!MI->getOperand(OpNo).isRegister() ||
OpNo+1 == MI->getNumOperands() ||
!MI->getOperand(OpNo+1).isRegister())
return true;
++OpNo; // Return the high-part.
break;
}
}
printOperand(MI, OpNo);
return false;
}
/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
/// the current output stream.
///