[all-commits] [llvm/llvm-project] 9f5d78: [X86][SSE] combineScalarToVector - only reuse broa...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9f5d783d467523d6218a63883b45192c8a875c96
      https://github.com/llvm/llvm-project/commit/9f5d783d467523d6218a63883b45192c8a875c96
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2021-06-02 (Wed, 02 Jun 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    A llvm/test/CodeGen/X86/pr50374.ll

  Log Message:
  -----------
  [X86][SSE] combineScalarToVector - only reuse broadcasts for scalar_to_vector if the source operands scalar types match

We were hitting an issue when the scalar_to_vector source was being implicitly truncated (in this case to i8 to vXi1) but we were also using the i8 source in a broadcast to a vXi8 value.

Fixes PR50374