Testcase for PR2537.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69866 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopStrengthReduce/pr2537.ll b/test/Transforms/LoopStrengthReduce/pr2537.ll
new file mode 100644 (file)
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--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/pr2537.ll
@@ -0,0 +1,21 @@
+; RUN: llvm-as < %s | opt -loop-reduce -disable-output
+; PR 2537
+
+define void @a() {
+entry:
+        br label %dobody
+
+dobody:         ; preds = %dobody, %entry
+        %y.0 = phi i128 [ 0, %entry ], [ %add, %dobody ]
+        %x.0 = phi i128 [ 0, %entry ], [ %add2, %dobody ]
+        %add = add i128 %y.0, shl (i128 1, i128 64)
+        %add2 = add i128 %x.0, shl (i128 1, i128 48)
+        call void @b( i128 %add )
+        %cmp = icmp ult i128 %add2, shl (i128 1, i128 64)
+        br i1 %cmp, label %dobody, label %afterdo
+
+afterdo:                ; preds = %dobody
+        ret void
+}
+
+declare void @b(i128 %add)
\ No newline at end of file