[PATCH] D28455: [X86] Fix PR30926 - Add patterns for optimizing cvtsi2ss, cvtsi2sd, and cvtss2sd clang intrinsic sequences

[Elad Cohen via Phabricator via llvm-commits]

eladcohen created this revision.
eladcohen added reviewers: igorb, craig.topper.
eladcohen added a subscriber: llvm-commits.

The code emitted by Clang's intrinsics for cvtsi2ss, cvtsi2sd, and cvtss2sd is lowered to a code sequence that includes redundant movss/movsd instructions. This patch adds patterns for optimizing these sequences.


https://reviews.llvm.org/D28455

Files:
  lib/Target/X86/X86InstrSSE.td
  test/CodeGen/X86/avx-cvt.ll
  test/CodeGen/X86/sse2-intrinsics-fast-isel.ll
  test/CodeGen/X86/vec_int_to_fp.ll

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