[llvm] [SimplifyCFG] Look at all uses when checking phi incoming for UB (PR #200164)

[Nikita Popov via llvm-commits]

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@@ -349,4 +349,43 @@ if.end7:                                          ; preds = %if.else, %if.then4,
   ret i32 %tmp9
 }
 
+define i64 @test5_several_uses(i1 %c, i1 %branch, ptr %p) nounwind {
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nikic wrote:

nounwind shouldn't be relevant.

https://github.com/llvm/llvm-project/pull/200164