20 lines
458 B
LLVM
20 lines
458 B
LLVM
; CFG Simplification is making a loop dead, then changing the add into:
|
|
;
|
|
; %V1 = add int %V1, 1
|
|
;
|
|
; Which is not valid SSA
|
|
;
|
|
; RUN: opt < %s -simplifycfg -simplifycfg-require-and-preserve-domtree=1 | llvm-dis
|
|
|
|
define void @test() {
|
|
; <label>:0
|
|
br i1 true, label %end, label %Loop
|
|
Loop: ; preds = %Loop, %0
|
|
%V = phi i32 [ 0, %0 ], [ %V1, %Loop ] ; <i32> [#uses=1]
|
|
%V1 = add i32 %V, 1 ; <i32> [#uses=1]
|
|
br label %Loop
|
|
end: ; preds = %0
|
|
ret void
|
|
}
|
|
|