[all-commits] [llvm/llvm-project] 417e50: [WebAssembly] Compute known bits for SIMD bitmask ...

[Thomas Lively via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 417e500668621e1275851ccf6e573a39482368b5
      https://github.com/llvm/llvm-project/commit/417e500668621e1275851ccf6e573a39482368b5
  Author: Thomas Lively <tlively at google.com>
  Date:   2021-08-02 (Mon, 02 Aug 2021)

  Changed paths:
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
    M llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.h
    A llvm/test/CodeGen/WebAssembly/simd-bitmask-mask.ll

  Log Message:
  -----------
  [WebAssembly] Compute known bits for SIMD bitmask intrinsics

This optimizes out the mask when the result of a bitmask is interpreted as an i8
or i16 value. Resolves PR50507.

Differential Revision: https://reviews.llvm.org/D107103