1
; RUN: llvm-as < %s | llvm-dis > %t1.ll
2
; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
3
; RUN: diff %t1.ll %t2.ll
5
;; This is an irreducible flow graph
6
define void @irreducible(i1 %cond) {
7
br i1 %cond, label %X, label %Y
16
;; This is a pair of loops that share the same header
17
define void @sharedheader(i1 %cond) {
20
A: ; preds = %Y, %X, %0
21
br i1 %cond, label %X, label %Y
31
;; This is a simple nested loop
32
define void @nested(i1 %cond1, i1 %cond2, i1 %cond3) {
35
Loop1: ; preds = %L2Exit, %0
38
Loop2: ; preds = %L3Exit, %Loop1
41
Loop3: ; preds = %Loop3, %Loop2
42
br i1 %cond3, label %Loop3, label %L3Exit
44
L3Exit: ; preds = %Loop3
45
br i1 %cond2, label %Loop2, label %L2Exit
47
L2Exit: ; preds = %L3Exit
48
br i1 %cond1, label %Loop1, label %L1Exit
50
L1Exit: ; preds = %L2Exit