tree 628dd4d6d26f9192957b030a49112bc46e64a08d
parent 5504d8b04a572dca9aec9eb21792958700f550c8
author Sanjay Patel <spatel@rotateright.com> 1593804895 -0400
committer Sanjay Patel <spatel@rotateright.com> 1593811720 -0400

[InstCombine] fold mul of sext bools to 'and'

Alive2:
  define i32 @src(i1 %x, i1 %y) {
  %0:
  %zx = sext i1 %x to i32
  %zy = sext i1 %y to i32
  %r = mul i32 %zx, %zy
  ret i32 %r
  }
  =>
  define i32 @tgt(i1 %x, i1 %y) {
  %0:
  %a = and i1 %x, %y
  %r = zext i1 %a to i32
  ret i32 %r
  }
  Transformation seems to be correct!

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