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Use GR32 for copies between GR32_NOSP and GR32_NOREX, as neither 

is a subset of the other, but both are subsets of GR32.

llvm-svn: 78250
This commit is contained in:
Dan Gohman 2009-08-05 22:18:26 +00:00
parent 01aabafee0
commit 77f33b71c7
1 changed files with 11 additions and 3 deletions
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14
llvm/lib/Target/X86/X86InstrInfo.cpp
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@ -1697,10 +1697,18 @@ bool X86InstrInfo::copyRegToReg(MachineBasicBlock &MBB,
CommonRC = SrcRC;
else if (!DestRC->hasSubClass(SrcRC)) {
// Neither of GR64_NOREX or GR64_NOSP is a superclass of the other,
// but we want to copy then as GR64.
if ((SrcRC == &X86::GR64RegClass || SrcRC->hasSuperClass(&X86::GR64RegClass)) &&
(DestRC == &X86::GR64RegClass || DestRC->hasSuperClass(&X86::GR64RegClass)))
// but we want to copy then as GR64. Similarly, for GR32_NOREX and
// GR32_NOSP, copy as GR32.
if ((SrcRC == &X86::GR64RegClass ||
SrcRC->hasSuperClass(&X86::GR64RegClass)) &&
(DestRC == &X86::GR64RegClass ||
DestRC->hasSuperClass(&X86::GR64RegClass)))
CommonRC = &X86::GR64RegClass;
else if ((SrcRC == &X86::GR32RegClass ||
SrcRC->hasSuperClass(&X86::GR32RegClass)) &&
(DestRC == &X86::GR32RegClass ||
DestRC->hasSuperClass(&X86::GR32RegClass)))
CommonRC = &X86::GR32RegClass;
else
CommonRC = 0;
}