1 ; This test ensures loop versioning does not produce an invalid dominator tree
2 ; if the exit block of the loop (bb0) dominates the runtime check block
3 ; (bb1 will become the runtime check block).
5 ; RUN: opt -passes=loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t
6 ; RUN: opt -passes=loop-simplify,loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t
7 ; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s
9 ; RUN: opt -passes=loop-versioning -verify-dom-info -S -o - %s > %t
10 ; RUN: opt -passes=loop-simplify,loop-versioning -verify-dom-info -S -o - %s > %t
11 ; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s
13 @c1 = external global i16
15 define void @f(i16 %a) {
22 %tmp1 = load i16, ptr @c1
26 %tmp2 = phi i16 [ %tmp1, %bb1 ], [ %tmp3, %bb2 ]
27 %tmp4 = getelementptr inbounds [1 x i32], ptr undef, i32 0, i32 4
28 store i32 1, ptr %tmp4
29 %tmp5 = getelementptr inbounds [1 x i32], ptr undef, i32 0, i32 9
30 store i32 0, ptr %tmp5
31 %tmp3 = add i16 %tmp2, 1
32 store i16 %tmp2, ptr @c1
33 %tmp6 = icmp sle i16 %tmp3, 0
34 br i1 %tmp6, label %bb2, label %bb0
37 ; Simple check to make sure loop versioning happened.
38 ; CHECK-VERSIONING: bb2.lver.check: