1; RUN: opt -S -licm -loop-guard-widening -licm -debug-pass=Structure -enable-new-pm=0 < %s 2>&1 | FileCheck %s --check-prefixes=LPM,CHECK
2; RUN: opt -S -passes='licm,guard-widening,licm' -debug-pass-manager < %s 2>&1 | FileCheck %s --check-prefixes=NPM,CHECK
3
4; Main point of this test is to check the scheduling -- there should be
5; no analysis passes needed between LICM and LoopGuardWidening
6
7; LPM: Loop Pass Manager
8; LPM:   Loop Invariant Code Motion
9; LPM:   Widen guards (within a single loop, as a loop pass)
10; LPM:   Loop Invariant Code Motion
11
12; NPM: LICMPass
13; NPM-NEXT: GuardWideningPass
14; NPM-NEXT: LICMPass
15
16declare void @llvm.experimental.guard(i1,...)
17
18define void @iter(i32 %a, i32 %b, i1* %c_p) {
19; CHECK-LABEL: @iter
20; CHECK:  %cond_0 = icmp ult i32 %a, 10
21; CHECK:  %cond_1 = icmp ult i32 %b, 10
22; CHECK:  %wide.chk = and i1 %cond_0, %cond_1
23; CHECK:  call void (i1, ...) @llvm.experimental.guard(i1 %wide.chk) [ "deopt"() ]
24; CHECK-LABEL: loop:
25
26entry:
27  %cond_0 = icmp ult i32 %a, 10
28  call void (i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"() ]
29  br label %loop
30
31loop:                                             ; preds = %loop.preheader, %loop
32  %cond_1 = icmp ult i32 %b, 10
33  call void (i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"() ]
34  %cnd = load i1, i1* %c_p
35  br i1 %cnd, label %loop, label %leave.loopexit
36
37leave.loopexit:                                   ; preds = %loop
38  br label %leave
39
40leave:                                            ; preds = %leave.loopexit, %entry
41  ret void
42}
43
44define void @within_loop(i32 %a, i32 %b, i1* %c_p) {
45; CHECK-LABEL: @within_loop
46; CHECK:  %cond_0 = icmp ult i32 %a, 10
47; CHECK:  %cond_1 = icmp ult i32 %b, 10
48; CHECK:  %wide.chk = and i1 %cond_0, %cond_1
49; CHECK:  call void (i1, ...) @llvm.experimental.guard(i1 %wide.chk) [ "deopt"() ]
50; CHECK-LABEL: loop:
51
52entry:
53  br label %loop
54
55loop:                                             ; preds = %loop.preheader, %loop
56  %cond_0 = icmp ult i32 %a, 10
57  call void (i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"() ]
58  %cond_1 = icmp ult i32 %b, 10
59  call void (i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"() ]
60  %cnd = load i1, i1* %c_p
61  br i1 %cnd, label %loop, label %leave.loopexit
62
63leave.loopexit:                                   ; preds = %loop
64  br label %leave
65
66leave:                                            ; preds = %leave.loopexit, %entry
67  ret void
68}
69
70