From b7c28944c4005f7c6e3807802e28914262188dcc Mon Sep 17 00:00:00 2001 From: Nick Lewycky Date: Mon, 6 Aug 2007 19:21:00 +0000 Subject: Let scalar-evolution analyze loops with an unsigned comparison for the exit condition. Fixes 1597. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40867 91177308-0d34-0410-b5e6-96231b3b80d8 --- .../ScalarEvolution/2007-09-06-Unsigned.ll | 29 ++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 test/Analysis/ScalarEvolution/2007-09-06-Unsigned.ll (limited to 'test') diff --git a/test/Analysis/ScalarEvolution/2007-09-06-Unsigned.ll b/test/Analysis/ScalarEvolution/2007-09-06-Unsigned.ll new file mode 100644 index 0000000..1b8dc4d --- /dev/null +++ b/test/Analysis/ScalarEvolution/2007-09-06-Unsigned.ll @@ -0,0 +1,29 @@ +; RUN: llvm-as < %s | opt -scalar-evolution -analyze |& grep "Loop bb: ( -1 + ( -1 * %x) + %y) iterations!" + +define i32 @f(i32 %x, i32 %y) { +entry: + %tmp63 = icmp ult i32 %x, %y ; [#uses=1] + br i1 %tmp63, label %bb.preheader, label %bb8 + +bb.preheader: ; preds = %entry + br label %bb + +bb: ; preds = %bb3, %bb.preheader + %x_addr.0 = phi i32 [ %tmp2, %bb3 ], [ %x, %bb.preheader ] ; [#uses=1] + %tmp2 = add i32 %x_addr.0, 1 ; [#uses=3] + br label %bb3 + +bb3: ; preds = %bb + %tmp6 = icmp ult i32 %tmp2, %y ; [#uses=1] + br i1 %tmp6, label %bb, label %bb8.loopexit + +bb8.loopexit: ; preds = %bb3 + br label %bb8 + +bb8: ; preds = %bb8.loopexit, %entry + %x_addr.1 = phi i32 [ %x, %entry ], [ %tmp2, %bb8.loopexit ] ; [#uses=1] + br label %return + +return: ; preds = %bb8 + ret i32 %x_addr.1 +} -- cgit v1.1