[PATCH] D41484: [X86][SSE] Use PMADDWD for v4i32 multiplies with 17 or more leading zeros

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 128106.
RKSimon added a comment.

Rebased after adding AVX tests to shrink_vmul.ll


Repository:
  rL LLVM

https://reviews.llvm.org/D41484

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/shrink_vmul.ll
  test/CodeGen/X86/slow-pmulld.ll

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