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start handling the 'f' x87 constraint. 

llvm-svn: 48239
This commit is contained in:
Chris Lattner 2008-03-11 19:06:29 +00:00
parent d01efb547f
commit 120ad01fcb
1 changed files with 9 additions and 0 deletions
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9
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -6238,6 +6238,7 @@ X86TargetLowering::getConstraintType(const std::string &Constraint) const {
if (Constraint.size() == 1) {
switch (Constraint[0]) {
case 'A':
case 'f':
case 'r':
case 'R':
case 'l':
@ -6399,6 +6400,14 @@ X86TargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
else if (VT == MVT::i8)
return std::make_pair(0U, X86::GR8RegisterClass);
break;
case 'f': // FP Stack registers.
// If SSE is enabled for this VT, use f80 to ensure the isel moves the
// value to the correct fpstack register class.
if (VT == MVT::f32 && !isScalarFPTypeInSSEReg(VT))
return std::make_pair(0U, X86::RFP32RegisterClass);
if (VT == MVT::f64 && !isScalarFPTypeInSSEReg(VT))
return std::make_pair(0U, X86::RFP64RegisterClass);
return std::make_pair(0U, X86::RFP80RegisterClass);
case 'y': // MMX_REGS if MMX allowed.
if (!Subtarget->hasMMX()) break;
return std::make_pair(0U, X86::VR64RegisterClass);