[PATCH] D26583: [X86][SSE] Improve SINT_TO_FP of boolean vector results (signum)

[Simon Pilgrim via llvm-commits]

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

This patch helps avoids poor legalization of boolean vector results (e.g. 8f32 -> 8i1 -> 8i16) that feed into SINT_TO_FP by inserting an early SIGN_EXTEND and so help improve the truncation logic.

This is not necessary for AVX512 targets where boolean vectors are legal.

Fix for PR13248


Repository:
  rL LLVM

https://reviews.llvm.org/D26583

Files:
  lib/Target/X86/X86ISelLowering.cpp
  test/CodeGen/X86/avx512-cvt.ll
  test/CodeGen/X86/sse-fsignum.ll

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D26583.77731.patch
Type: text/x-patch
Size: 9114 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20161113/9de59828/attachment.bin>