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| -rw-r--r-- | test/Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll b/test/Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll new file mode 100644 index 0000000..b53ce95 --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/dont-hoist-simple-loop-constants.ll @@ -0,0 +1,24 @@ +; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | not grep 'cast uint 1 to uint' +; The setlt wants to use a value that is incremented one more than the dominant +; IV. Don't insert the 1 outside the loop, preventing folding it into the add. + +implementation ; Functions: + +void %test([700 x int]* %nbeaux_.0__558, int* %i_.16574) { +then.0: + br label %no_exit.2 + +no_exit.2: ; preds = %no_exit.2, %then.0 + %indvar630 = phi uint [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <uint> [#uses=3] + %indvar630 = cast uint %indvar630 to int ; <int> [#uses=1] + %tmp.38 = getelementptr [700 x int]* %nbeaux_.0__558, int 0, uint %indvar630 ; <int*> [#uses=1] + store int 0, int* %tmp.38 + %inc.2 = add int %indvar630, 2 ; <int> [#uses=2] + %tmp.34 = setlt int %inc.2, 701 ; <bool> [#uses=1] + %indvar.next631 = add uint %indvar630, 1 ; <uint> [#uses=1] + br bool %tmp.34, label %no_exit.2, label %loopexit.2.loopexit + +loopexit.2.loopexit: ; preds = %no_exit.2 + store int %inc.2, int* %i_.16574 + ret void +} |