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Fix X86RegisterInfo::getMatchingSuperRegClass for sub_8bit_hi. 

It is OK for B to be any GR8_ABCD_H superclass, the returned register class
doesn't have to map surjectively onto B.

llvm-svn: 130892
This commit is contained in:
Jakob Stoklund Olesen 2011-05-04 23:54:54 +00:00
parent 369bddf5ad
commit 808dca12f8
1 changed files with 8 additions and 13 deletions
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19
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -229,18 +229,13 @@ X86RegisterInfo::getMatchingSuperRegClass(const TargetRegisterClass *A,
}
break;
case X86::sub_8bit_hi:
if (B == &X86::GR8_ABCD_HRegClass) {
if (A == &X86::GR64RegClass || A == &X86::GR64_ABCDRegClass ||
A == &X86::GR64_NOREXRegClass ||
A == &X86::GR64_NOSPRegClass ||
A == &X86::GR64_NOREX_NOSPRegClass)
return &X86::GR64_ABCDRegClass;
else if (A == &X86::GR32RegClass || A == &X86::GR32_ABCDRegClass ||
A == &X86::GR32_NOREXRegClass || A == &X86::GR32_NOSPRegClass)
return &X86::GR32_ABCDRegClass;
else if (A == &X86::GR16RegClass || A == &X86::GR16_ABCDRegClass ||
A == &X86::GR16_NOREXRegClass)
return &X86::GR16_ABCDRegClass;
if (B == &X86::GR8_ABCD_HRegClass ||
B->hasSubClass(&X86::GR8_ABCD_HRegClass))
switch (A->getSize()) {
case 2: return getCommonSubClass(A, &X86::GR16_ABCDRegClass);
case 4: return getCommonSubClass(A, &X86::GR32_ABCDRegClass);
case 8: return getCommonSubClass(A, &X86::GR64_ABCDRegClass);
default: return 0;
}
break;
case X86::sub_16bit: