[PATCH] D31961: DAGCombine: Combine shuffles of splat-shuffles

[Zvi Rackover via Phabricator via llvm-commits]

zvi added inline comments.


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Comment at: test/CodeGen/X86/shuffle-of-splat-multiuses.ll:77
+; AVX2-NEXT:    vpshufd {{.*#+}} xmm0 = xmm0[2,3,2,3]
+; AVX2-NEXT:    vmovdqa %xmm0, (%rdi)
+; AVX2-NEXT:    vmovdqa %xmm1, %xmm0
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These two moves seem like a result of suboptimal scheduling + register allocation choices.


Repository:
  rL LLVM

https://reviews.llvm.org/D31961