llvm-project/llvm/test/Transforms/SCCP/2004-12-10-UndefBranchBug.ll

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; RUN: opt < %s -sccp -S | grep "ret i32 1"
; This function definitely returns 1, even if we don't know the direction
; of the branch.
define i32 @foo() {
br i1 undef, label %T, label %T
T: ; preds = %0, %0
%X = add i32 0, 1 ; <i32> [#uses=1]
ret i32 %X
}