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Merging r200775:
------------------------------------------------------------------------ r200775 | thomas.stellard | 2014-02-04 09:18:42 -0800 (Tue, 04 Feb 2014) | 5 lines R600/SI: Don't assume copies will be coalesced in SIFixSGPRCopies 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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_34@204644 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -187,7 +187,7 @@ bool SIFixSGPRCopies::isVGPRToSGPRCopy(const MachineInstr &Copy,
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DstRC == &AMDGPU::M0RegRegClass)
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return false;
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SrcRC = inferRegClassFromDef(TRI, MRI, SrcReg, SrcSubReg);
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SrcRC = TRI->getSubRegClass(MRI.getRegClass(SrcReg), SrcSubReg);
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return TRI->isSGPRClass(DstRC) && TRI->hasVGPRs(SrcRC);
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}
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