; This testcase causes an infinite loop in the instruction combiner,
; because it things that the constant value is a not expression... and
; constantly inverts the branch back and forth.
;
; RUN: llvm-as < %s | opt -instcombine -disable-output
define i8 @test19(i1 %c) {
br i1 true, label %True, label %False
True: ; preds = %0
ret i8 1
False: ; preds = %0
ret i8 3
}