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R600/SI: Don't assume copies will be coalesced in SIFixSGPRCopies

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There is no lit test for this, because it would be too big and
complicated, but it does fix a crash in the Arithm/Absdiff.* OpenCV test.

llvm-svn: 200775
This commit is contained in:
Tom Stellard 2014-02-04 17:18:42 +00:00
parent 279daf2506
commit f57fbab65b
1 changed files with 1 additions and 1 deletions
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2
lib/Target/R600/SIFixSGPRCopies.cpp
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@ -187,7 +187,7 @@ bool SIFixSGPRCopies::isVGPRToSGPRCopy(const MachineInstr &Copy,
DstRC == &AMDGPU::M0RegRegClass)
return false;
SrcRC = inferRegClassFromDef(TRI, MRI, SrcReg, SrcSubReg);
SrcRC = TRI->getSubRegClass(MRI.getRegClass(SrcReg), SrcSubReg);
return TRI->isSGPRClass(DstRC) && TRI->hasVGPRs(SrcRC);
}