1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2; RUN: opt -S -make-guards-explicit -basicaa -licm < %s        | FileCheck %s
3; RUN: opt -S -aa-pipeline=basic-aa -passes='require<opt-remark-emit>,make-guards-explicit,loop(licm)' < %s | FileCheck %s
4
5; Test interaction between explicit guards and LICM: make sure that we do not
6; hoist explicit conditions while we can hoist invariant loads in presence of
7; explicit guards.
8
9declare void @llvm.experimental.guard(i1,...)
10
11; Make sure that we do not hoist widenable_cond out of loop.
12define void @do_not_hoist_widenable_cond(i1 %cond, i32 %N, i32 %M) {
13; CHECK-LABEL: @do_not_hoist_widenable_cond(
14; CHECK-NEXT:  entry:
15; CHECK-NEXT:    br label [[LOOP:%.*]]
16; CHECK:       loop:
17; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ]
18; CHECK-NEXT:    [[GUARD_COND:%.*]] = icmp slt i32 [[IV]], [[N:%.*]]
19; CHECK-NEXT:    [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
20; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[GUARD_COND]], [[WIDENABLE_COND]]
21; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]], !prof !0
22; CHECK:       deopt:
23; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"() ]
24; CHECK-NEXT:    ret void
25; CHECK:       guarded:
26; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp slt i32 [[IV]], [[M:%.*]]
27; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
28; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
29; CHECK:       exit:
30; CHECK-NEXT:    ret void
31;
32entry:
33  br label %loop
34
35loop:
36  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
37  %guard_cond = icmp slt i32 %iv, %N
38  call void(i1, ...) @llvm.experimental.guard(i1 %guard_cond) [ "deopt"() ]
39  %loop_cond = icmp slt i32 %iv, %M
40  %iv.next = add i32 %iv, 1
41  br i1 %loop_cond, label %loop, label %exit
42
43exit:
44  ret void
45}
46
47define void @hoist_invariant_load(i1 %cond, i32* %np, i32 %M) {
48; CHECK-LABEL: @hoist_invariant_load(
49; CHECK-NEXT:  entry:
50; CHECK-NEXT:    [[N:%.*]] = load i32, i32* [[NP:%.*]]
51; CHECK-NEXT:    br label [[LOOP:%.*]]
52; CHECK:       loop:
53; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[GUARDED:%.*]] ]
54; CHECK-NEXT:    [[GUARD_COND:%.*]] = icmp slt i32 [[IV]], [[N]]
55; CHECK-NEXT:    [[WIDENABLE_COND:%.*]] = call i1 @llvm.experimental.widenable.condition()
56; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[GUARD_COND]], [[WIDENABLE_COND]]
57; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED]], label [[DEOPT:%.*]], !prof !0
58; CHECK:       deopt:
59; CHECK-NEXT:    call void (...) @llvm.experimental.deoptimize.isVoid() [ "deopt"() ]
60; CHECK-NEXT:    ret void
61; CHECK:       guarded:
62; CHECK-NEXT:    [[LOOP_COND:%.*]] = icmp slt i32 [[IV]], [[M:%.*]]
63; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
64; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
65; CHECK:       exit:
66; CHECK-NEXT:    ret void
67;
68entry:
69  br label %loop
70
71loop:
72  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
73  %N = load i32, i32* %np
74  %guard_cond = icmp slt i32 %iv, %N
75  call void(i1, ...) @llvm.experimental.guard(i1 %guard_cond) [ "deopt"() ]
76  %loop_cond = icmp slt i32 %iv, %M
77  %iv.next = add i32 %iv, 1
78  br i1 %loop_cond, label %loop, label %exit
79
80exit:
81  ret void
82}
83