fhahn wrote:
It looks like this is causing a crash for
```
; opt -p instcombine
define float @foo(i1 %cmp, float %x, float noundef %y, float noundef %z) {
entry:
%div = fdiv float %y, %y
%scale.0 = select i1 %cmp, float %div, float %y
%mul = fmul float %scale.0, %x
ret float %mul
}
```
Fails with
```
Instruction does not dominate all uses!
%1 = select i1 %0, float 0x7FF8000000000000, float 1.000000e+00
%scale.0 = select i1 %cmp, float %1, float %y
LLVM ERROR: Broken module found, compilation aborted!
```
https://github.com/llvm/llvm-project/pull/177490
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