[all-commits] [llvm/llvm-project] ffd0e4: [X86] Add mul(x, x) tests showing miscompile

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ffd0e464b4b98ffa9a511b09dd36cfba33fed8a1
      https://github.com/llvm/llvm-project/commit/ffd0e464b4b98ffa9a511b09dd36cfba33fed8a1
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-01-31 (Mon, 31 Jan 2022)

  Changed paths:
    M llvm/test/CodeGen/X86/combine-mul.ll

  Log Message:
  -----------
  [X86] Add mul(x,x) tests showing miscompile

As raised by @efriedma on D117995 - the source must not be undef/poison to demand any bits in mul(x,x) other than bit[1]

https://alive2.llvm.org/ce/z/Cxkjen