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e874345be4
If pseudoToMCOpcode failed, we would return the original opcode, so operands would be swapped, but the instruction would remain the same. It resulted in LSHLREV a, b ---> LSHLREV b, a. This fixes Glamor text rendering and piglit/arb_sample_shading-builtin-gl-sample-mask on VI. This is a candidate for stable branches. v2: the test was simplified by Tom Stellard git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@240824 91177308-0d34-0410-b5e6-96231b3b80d8