[PATCH] D52109: [TwoAddressInstructionPass] Don't update SrcRegMap for copies inserted for tied register constraint when the src isn't killed

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


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Comment at: test/CodeGen/X86/psubus.ll:1435
+; SSE2-NEXT:    punpckhwd {{.*#+}} xmm3 = xmm3[4],xmm0[4],xmm3[5],xmm0[5],xmm3[6],xmm0[6],xmm3[7],xmm0[7]
+; SSE2-NEXT:    movdqa {{.*#+}} xmm0 = [2147483648,2147483648,2147483648,2147483648]
 ; SSE2-NEXT:    movdqa %xmm2, %xmm6
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This is a pity - why did the zero vector reuse a live register?


https://reviews.llvm.org/D52109