[PATCH] D89697: * [x86] Implement smarter instruction lowering for FP_TO_UINT from vXf32/vXf64 to vXi32 for SSE2 and AVX2 by using the exact semantic of the CVTTPS2SI instruction.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon updated this revision to Diff 358048.
RKSimon retitled this revision from "* [x86] Implement smarter instruction lowering for FP_TO_UINT from vXf32 to vXi32 for SSE2 and AVX2 by using the exact semantic of the CVTTPS2SI instruction." to "* [x86] Implement smarter instruction lowering for FP_TO_UINT from vXf32/vXf64 to vXi32 for SSE2 and AVX2 by using the exact semantic of the CVTTPS2SI instruction.".
RKSimon edited the summary of this revision.
RKSimon added a comment.

Updated patch to also handle vXf64->vXi32 vector and f32/f64->u64/u32 scalar fptoui cases.

I've also added AVX1 support for v8f32->v8i32 where we still need a VBLENDPS (instead of a VSRAI ymm).

Refreshed costs using the helper script from D103695 <https://reviews.llvm.org/D103695> for reference.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D89697/new/

https://reviews.llvm.org/D89697

Files:
  llvm/lib/Target/X86/X86ISelLowering.cpp
  llvm/lib/Target/X86/X86TargetTransformInfo.cpp
  llvm/test/Analysis/CostModel/X86/fptoui.ll
  llvm/test/CodeGen/X86/concat-cast.ll
  llvm/test/CodeGen/X86/fptoui-sat-scalar.ll
  llvm/test/CodeGen/X86/ftrunc.ll
  llvm/test/CodeGen/X86/half.ll
  llvm/test/CodeGen/X86/scalar-fp-to-i32.ll
  llvm/test/CodeGen/X86/scalar-fp-to-i64.ll
  llvm/test/CodeGen/X86/vec_cast3.ll
  llvm/test/CodeGen/X86/vec_fp_to_int.ll
  llvm/test/Transforms/SLPVectorizer/X86/fptoui.ll

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