1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
2 ; RUN: opt < %s -passes=loop-versioning -S -o - | FileCheck %s
4 ; This test case used to end like this:
6 ; Instruction does not dominate all uses!
7 ; %t2 = load i16, i16* @b, align 1, !tbaa !2, !alias.scope !6
8 ; %tobool = icmp eq i16 %t2, 0
9 ; LLVM ERROR: Broken function found, compilation aborted!
11 ; due to a fault where we did not replace the use of %t2 in the icmp in
12 ; for.end, when adding a new PHI node for the versioned loops based on the
13 ; loop-defined values used outside of the loop.
15 ; Verify that the code compiles, that we get a versioned loop, and that the
16 ; uses of %t2 in for.end and if.then are updated to use the value from the
19 @a = dso_local global i16 0, align 1
20 @b = dso_local global i16 0, align 1
21 @c = dso_local global ptr null, align 1
24 ; CHECK-LABEL: define void @f1() {
26 ; CHECK-NEXT: [[T0:%.*]] = load ptr, ptr @c, align 1
27 ; CHECK-NEXT: [[SCEVGEP:%.*]] = getelementptr i8, ptr [[T0]], i64 2
28 ; CHECK-NEXT: br label [[FOR_BODY_LVER_CHECK:%.*]]
29 ; CHECK: for.body.lver.check:
30 ; CHECK-NEXT: [[BOUND0:%.*]] = icmp ult ptr [[T0]], getelementptr inbounds (i8, ptr @b, i64 2)
31 ; CHECK-NEXT: [[BOUND1:%.*]] = icmp ult ptr @b, [[SCEVGEP]]
32 ; CHECK-NEXT: [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
33 ; CHECK-NEXT: br i1 [[FOUND_CONFLICT]], label [[FOR_BODY_PH_LVER_ORIG:%.*]], label [[FOR_BODY_PH:%.*]]
34 ; CHECK: for.body.ph.lver.orig:
35 ; CHECK-NEXT: br label [[FOR_BODY_LVER_ORIG:%.*]]
36 ; CHECK: for.body.lver.orig:
37 ; CHECK-NEXT: [[T1_LVER_ORIG:%.*]] = phi i64 [ 0, [[FOR_BODY_PH_LVER_ORIG]] ], [ [[INC_LVER_ORIG:%.*]], [[FOR_BODY_LVER_ORIG]] ]
38 ; CHECK-NEXT: [[T2_LVER_ORIG:%.*]] = load i16, ptr @b, align 1, !tbaa [[TBAA2:![0-9]+]]
39 ; CHECK-NEXT: store i16 [[T2_LVER_ORIG]], ptr [[T0]], align 1, !tbaa [[TBAA2]]
40 ; CHECK-NEXT: [[INC_LVER_ORIG]] = add nuw nsw i64 [[T1_LVER_ORIG]], 1
41 ; CHECK-NEXT: [[CMP_LVER_ORIG:%.*]] = icmp ult i64 [[INC_LVER_ORIG]], 3
42 ; CHECK-NEXT: br i1 [[CMP_LVER_ORIG]], label [[FOR_BODY_LVER_ORIG]], label [[FOR_END_LOOPEXIT:%.*]]
44 ; CHECK-NEXT: br label [[FOR_BODY:%.*]]
46 ; CHECK-NEXT: [[T1:%.*]] = phi i64 [ 0, [[FOR_BODY_PH]] ], [ [[INC:%.*]], [[FOR_BODY]] ]
47 ; CHECK-NEXT: [[T2:%.*]] = load i16, ptr @b, align 1, !tbaa [[TBAA2]], !alias.scope [[META6:![0-9]+]]
48 ; CHECK-NEXT: store i16 [[T2]], ptr [[T0]], align 1, !tbaa [[TBAA2]], !alias.scope [[META9:![0-9]+]], !noalias [[META6]]
49 ; CHECK-NEXT: [[INC]] = add nuw nsw i64 [[T1]], 1
50 ; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[INC]], 3
51 ; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END_LOOPEXIT1:%.*]]
52 ; CHECK: for.end.loopexit:
53 ; CHECK-NEXT: [[T2_LVER_PH:%.*]] = phi i16 [ [[T2_LVER_ORIG]], [[FOR_BODY_LVER_ORIG]] ]
54 ; CHECK-NEXT: br label [[FOR_END:%.*]]
55 ; CHECK: for.end.loopexit1:
56 ; CHECK-NEXT: [[T2_LVER_PH2:%.*]] = phi i16 [ [[T2]], [[FOR_BODY]] ]
57 ; CHECK-NEXT: br label [[FOR_END]]
59 ; CHECK-NEXT: [[T2_LVER:%.*]] = phi i16 [ [[T2_LVER_PH]], [[FOR_END_LOOPEXIT]] ], [ [[T2_LVER_PH2]], [[FOR_END_LOOPEXIT1]] ]
60 ; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i16 [[T2_LVER]], 0
61 ; CHECK-NEXT: br i1 [[TOBOOL]], label [[FOR_COND_BACKEDGE:%.*]], label [[IF_THEN:%.*]]
62 ; CHECK: for.cond.backedge:
63 ; CHECK-NEXT: br label [[FOR_BODY_LVER_CHECK]]
65 ; CHECK-NEXT: store i16 [[T2_LVER]], ptr @a, align 1, !tbaa [[TBAA2]]
66 ; CHECK-NEXT: br label [[FOR_COND_BACKEDGE]]
69 %t0 = load ptr, ptr @c, align 1
72 for.cond: ; preds = %for.cond.backedge, %entry
75 for.body: ; preds = %for.cond, %for.body
76 %t1 = phi i64 [ 0, %for.cond ], [ %inc, %for.body ]
77 %t2 = load i16, ptr @b, align 1, !tbaa !2
78 store i16 %t2, ptr %t0, align 1, !tbaa !2
79 %inc = add nuw nsw i64 %t1, 1
80 %cmp = icmp ult i64 %inc, 3
81 br i1 %cmp, label %for.body, label %for.end
83 for.end: ; preds = %for.body
84 %tobool = icmp eq i16 %t2, 0
85 br i1 %tobool, label %for.cond.backedge, label %if.then
87 for.cond.backedge: ; preds = %for.end, %if.then
90 if.then: ; preds = %for.end
91 store i16 %t2, ptr @a, align 1, !tbaa !2
92 br label %for.cond.backedge
95 !llvm.module.flags = !{!0}
98 !0 = !{i32 1, !"wchar_size", i32 1}
99 !1 = !{!"clang version 7.0.0"}
100 !2 = !{!3, !3, i64 0}
101 !3 = !{!"long long", !4, i64 0}
102 !4 = !{!"omnipotent char", !5, i64 0}
103 !5 = !{!"Simple C/C++ TBAA"}