[PATCH] D90658: [X86] Improve lowering of fptoui

[Layton Kifer via Phabricator via llvm-commits]

laytonio created this revision.
laytonio added reviewers: craig.topper, RKSimon.
Herald added subscribers: llvm-commits, pengfei, hiraditya.
Herald added a project: LLVM.
laytonio requested review of this revision.

Invert the select condition when masking in the sign bit of a fptoui operation. Also, rather than lowering the sign mask to select/xor and expecting the select to get cleaned up later, directly lower to shift/xor.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90658

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/test/CodeGen/X86/fp-cvt.ll
  llvm/test/CodeGen/X86/fp-intrinsics-flags.ll
  llvm/test/CodeGen/X86/fp-intrinsics.ll
  llvm/test/CodeGen/X86/fp-strict-scalar-fptoint.ll
  llvm/test/CodeGen/X86/fp80-strict-scalar.ll
  llvm/test/CodeGen/X86/scalar-fp-to-i64.ll
  llvm/test/CodeGen/X86/vec-strict-fptoint-128.ll
  llvm/test/CodeGen/X86/vec-strict-fptoint-256.ll
  llvm/test/CodeGen/X86/vec-strict-fptoint-512.ll

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