[PATCH] D23797: [X86][SSE] Improve awareness of (v)cvtpd2ps implicit zeroing of upper 64-bits of xmm result

[Simon Pilgrim via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: ab, mkuper, spatel, andreadb.
RKSimon added a subscriber: llvm-commits.
RKSimon set the repository for this revision to rL LLVM.

Add patterns to avoid inserting unnecessary zeroing shuffles.

Repository:
  rL LLVM

https://reviews.llvm.org/D23797

Files:
  lib/Target/X86/X86InstrSSE.td
  lib/Target/X86/X86IntrinsicsInfo.h
  test/CodeGen/X86/sse2-intrinsics-x86.ll
  test/CodeGen/X86/vec_fptrunc.ll

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