[PATCH] D28810: [X86][SSE] Use MOVMSK for all_of/any_of reduction patterns

[Andrea Di Biagio via Phabricator via llvm-commits]

andreadb added inline comments.


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Comment at: test/CodeGen/X86/vector-compare-all_of.ll:739-746
+; SSE-NEXT:    pmovmskb %xmm0, %eax
+; SSE-NEXT:    cmpl $65535, %eax # imm = 0xFFFF
+; SSE-NEXT:    movb $-1, %al
+; SSE-NEXT:    je .LBB14_2
+; SSE-NEXT:  # BB#1:
+; SSE-NEXT:    xorl %eax, %eax
+; SSE-NEXT:  .LBB14_2:
----------------
I was expecting to see the usual `cmpl+movw+cmov` pattern here.
Is it because you would end up with a conditional move of i8 quantities?


Repository:
  rL LLVM

https://reviews.llvm.org/D28810