| ; This test ensures loop versioning does not produce an invalid dominator tree |
| ; if the exit block of the loop (bb0) dominates the runtime check block |
| ; (bb1 will become the runtime check block). |
| |
| ; RUN: opt -loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t |
| ; RUN: opt -loop-simplify -loop-distribute -enable-loop-distribute -verify-dom-info -S -o - %s > %t |
| ; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s |
| |
| ; RUN: opt -loop-versioning -verify-dom-info -S -o - %s > %t |
| ; RUN: opt -loop-simplify -loop-versioning -verify-dom-info -S -o - %s > %t |
| ; RUN: FileCheck --check-prefix CHECK-VERSIONING -input-file %t %s |
| |
| @c1 = external global i16 |
| |
| define void @f(i16 %a) { |
| br label %bb0 |
| |
| bb0: |
| br label %bb1 |
| |
| bb1: |
| %tmp1 = load i16, i16* @c1 |
| br label %bb2 |
| |
| bb2: |
| %tmp2 = phi i16 [ %tmp1, %bb1 ], [ %tmp3, %bb2 ] |
| %tmp4 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 4 |
| store i32 1, i32* %tmp4 |
| %tmp5 = getelementptr inbounds [1 x i32], [1 x i32]* undef, i32 0, i32 9 |
| store i32 0, i32* %tmp5 |
| %tmp3 = add i16 %tmp2, 1 |
| store i16 %tmp2, i16* @c1 |
| %tmp6 = icmp sle i16 %tmp3, 0 |
| br i1 %tmp6, label %bb2, label %bb0 |
| } |
| |
| ; Simple check to make sure loop versioning happened. |
| ; CHECK-VERSIONING: bb2.lver.check: |