From 054a833dd450aaef900e6cf5739b50cded5670fb Mon Sep 17 00:00:00 2001 From: Devang Patel Date: Thu, 14 Aug 2008 20:58:31 +0000 Subject: If IV is used in a int-to-float cast inside the loop then try to eliminate the cast opeation. llvm-svn: 54786 --- .../LoopStrengthReduce/2008-08-14-ShadowIV.ll | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 llvm/test/Transforms/LoopStrengthReduce/2008-08-14-ShadowIV.ll (limited to 'llvm/test/Transforms/LoopStrengthReduce') diff --git a/llvm/test/Transforms/LoopStrengthReduce/2008-08-14-ShadowIV.ll b/llvm/test/Transforms/LoopStrengthReduce/2008-08-14-ShadowIV.ll new file mode 100644 index 00000000000..681c9be1675 --- /dev/null +++ b/llvm/test/Transforms/LoopStrengthReduce/2008-08-14-ShadowIV.ll @@ -0,0 +1,27 @@ +; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep "phi double" + +define void @foobar(i32 %n) nounwind { +entry: + icmp eq i32 %n, 0 ; :0 [#uses=2] + br i1 %0, label %return, label %bb.nph + +bb.nph: ; preds = %entry + %umax = select i1 %0, i32 1, i32 %n ; [#uses=1] + br label %bb + +bb: ; preds = %bb, %bb.nph + %i.03 = phi i32 [ 0, %bb.nph ], [ %indvar.next, %bb ] ; [#uses=3] + tail call void @bar( i32 %i.03 ) nounwind + uitofp i32 %i.03 to double ; :1 [#uses=1] + tail call void @foo( double %1 ) nounwind + %indvar.next = add i32 %i.03, 1 ; [#uses=2] + %exitcond = icmp eq i32 %indvar.next, %umax ; [#uses=1] + br i1 %exitcond, label %return, label %bb + +return: ; preds = %bb, %entry + ret void +} + +declare void @bar(i32) + +declare void @foo(double) -- cgit v1.2.3