From a0cf183e2c2c492eada2e97906b4bc5691f3ef1a Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 12 Sep 2005 05:50:15 +0000 Subject: [PATCH] new testcase git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23312 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../use_postinc_value_outside_loop.ll | 28 +++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll 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 00000000000..42bbbcb50c9 --- /dev/null +++ b/test/Transforms/LoopStrengthReduce/use_postinc_value_outside_loop.ll @@ -0,0 +1,28 @@ +; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep 'add uint %iv..inc, 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 bool %pred(int %X) + +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 ] ; [#uses=3] + %indvar630 = cast uint %indvar630 to int ; [#uses=1] + %tmp.38 = getelementptr [700 x int]* %nbeaux_.0__558, int 0, uint %indvar630 ; [#uses=1] + store int 0, int* %tmp.38 + %inc.2 = add int %indvar630, 2 ; [#uses=2] + %tmp.34 = call bool %pred(int %indvar630) + %indvar.next631 = add uint %indvar630, 1 ; [#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 +} -- 2.34.1