diff options
Diffstat (limited to 'test/Transforms/LoopSimplify/single-backedge.ll')
| -rw-r--r-- | test/Transforms/LoopSimplify/single-backedge.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/LoopSimplify/single-backedge.ll b/test/Transforms/LoopSimplify/single-backedge.ll new file mode 100644 index 0000000000000..8391048eed220 --- /dev/null +++ b/test/Transforms/LoopSimplify/single-backedge.ll @@ -0,0 +1,20 @@ +; The loop canonicalization pass should guarantee that there is one backedge +; for all loops. This allows the -indvars pass to recognize the %IV +; induction variable in this testcase. + +; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep indvar + +define i32 @test(i1 %C) { +; <label>:0 + br label %Loop +Loop: ; preds = %BE2, %BE1, %0 + %IV = phi i32 [ 1, %0 ], [ %IV2, %BE1 ], [ %IV2, %BE2 ] ; <i32> [#uses=2] + store i32 %IV, i32* null + %IV2 = add i32 %IV, 2 ; <i32> [#uses=2] + br i1 %C, label %BE1, label %BE2 +BE1: ; preds = %Loop + br label %Loop +BE2: ; preds = %Loop + br label %Loop +} + |