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Diffstat (limited to 'test/Transforms/LoopStrengthReduce/variable_stride.ll')
| -rw-r--r-- | test/Transforms/LoopStrengthReduce/variable_stride.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/variable_stride.ll b/test/Transforms/LoopStrengthReduce/variable_stride.ll new file mode 100644 index 0000000..7c0f053 --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/variable_stride.ll @@ -0,0 +1,18 @@ +; Check that variable strides are reduced to adds instead of multiplies. +; RUN: opt < %s -loop-reduce -S | not grep mul + +declare i1 @pred(i32) + +define void @test([10000 x i32]* %P, i32 %STRIDE) { +; <label>:0 + br label %Loop +Loop: ; preds = %Loop, %0 + %INDVAR = phi i32 [ 0, %0 ], [ %INDVAR2, %Loop ] ; <i32> [#uses=2] + %Idx = mul i32 %INDVAR, %STRIDE ; <i32> [#uses=1] + %cond = call i1 @pred( i32 %Idx ) ; <i1> [#uses=1] + %INDVAR2 = add i32 %INDVAR, 1 ; <i32> [#uses=1] + br i1 %cond, label %Loop, label %Out +Out: ; preds = %Loop + ret void +} + |