[PATCH] D17181: [X86] Don't turn (c?-v:v) into (c?-v:0) by blindly using PSIGN.

[Ahmed Bougacha via llvm-commits]

ab updated this revision to Diff 48009.
ab added a comment.

Simplify (srl c, 31) to reuse intermediate result: (srl (sra c, 31), 31).

Noticed after uploading the patch, of course ;)


http://reviews.llvm.org/D17181

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/avx2-logic.ll
  test/CodeGen/X86/vec-sign.ll

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