diff options
Diffstat (limited to 'test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll')
| -rw-r--r-- | test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll b/test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll new file mode 100644 index 0000000..a99a823 --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll @@ -0,0 +1,29 @@ +; RUN: opt < %s -loop-reduce -S | \ +; RUN: grep {add i32 %lsr.iv.next, 1} +; +; Make sure that the use of the IV outside of the loop (the store) uses the +; post incremented value of the IV, not the preincremented value. This +; prevents the loop from having to keep the post and pre-incremented value +; around for the duration of the loop, adding a copy and an extra register +; to the loop. + +declare i1 @pred(i32) + +define void @test([700 x i32]* %nbeaux_.0__558, i32* %i_.16574) { +then.0: + br label %no_exit.2 +no_exit.2: ; preds = %no_exit.2, %then.0 + %indvar630.ui = phi i32 [ 0, %then.0 ], [ %indvar.next631, %no_exit.2 ] ; <i32> [#uses=3] + %indvar630 = bitcast i32 %indvar630.ui to i32 ; <i32> [#uses=2] + %gep.upgrd.1 = zext i32 %indvar630.ui to i64 ; <i64> [#uses=1] + %tmp.38 = getelementptr [700 x i32]* %nbeaux_.0__558, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1] + store i32 0, i32* %tmp.38 + %inc.2 = add i32 %indvar630, 2 ; <i32> [#uses=1] + %tmp.34 = call i1 @pred( i32 %indvar630 ) ; <i1> [#uses=1] + %indvar.next631 = add i32 %indvar630.ui, 1 ; <i32> [#uses=1] + br i1 %tmp.34, label %no_exit.2, label %loopexit.2.loopexit +loopexit.2.loopexit: ; preds = %no_exit.2 + store i32 %inc.2, i32* %i_.16574 + ret void +} + |