llvm-project/llvm/test/Transforms/SCCP/basictest.ll

; This is a basic sanity check for constant propogation.  The add instruction 
; should be eliminated.

; RUN: llvm-as < %s | opt -sccp | llvm-dis | not grep add

define i32 @test(i1 %B) {
	br i1 %B, label %BB1, label %BB2
BB1:		; preds = %0
	%Val = add i32 0, 0		; <i32> [#uses=1]
	br label %BB3
BB2:		; preds = %0
	br label %BB3
BB3:		; preds = %BB2, %BB1
	%Ret = phi i32 [ %Val, %BB1 ], [ 1, %BB2 ]		; <i32> [#uses=1]
	ret i32 %Ret
}