diff options
Diffstat (limited to 'llvm/test/Transforms/LoopVersioning/exit-block-dominates-rt-check-block.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopVersioning/exit-block-dominates-rt-check-block.ll | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopVersioning/exit-block-dominates-rt-check-block.ll b/llvm/test/Transforms/LoopVersioning/exit-block-dominates-rt-check-block.ll new file mode 100644 index 00000000000..960c890516c --- /dev/null +++ b/llvm/test/Transforms/LoopVersioning/exit-block-dominates-rt-check-block.ll @@ -0,0 +1,38 @@ +; 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: |
