Add testcase from PR3086.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69862 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/LoopStrengthReduce/pr3086.ll b/test/Transforms/LoopStrengthReduce/pr3086.ll
new file mode 100644 (file)
index 0000000..4ca333f
--- /dev/null
+++ b/test/Transforms/LoopStrengthReduce/pr3086.ll
@@ -0,0 +1,28 @@
+; RUN: llvm-as < %s | opt -loop-reduce -disable-output
+; PR 3086
+
+       %struct.Cls = type { i32, i8, [2 x %struct.Cls*], [2 x %struct.Lit*] }
+       %struct.Lit = type { i8 }
+
+define fastcc i64 @collect_clauses() nounwind {
+entry:
+       br label %bb11
+
+bb5:           ; preds = %bb9
+       %0 = load %struct.Lit** %storemerge, align 8            ; <%struct.Lit*> [#uses=0]
+       %indvar.next8 = add i64 %storemerge.rec, 1              ; <i64> [#uses=1]
+       br label %bb9
+
+bb9:           ; preds = %bb22, %bb5
+       %storemerge.rec = phi i64 [ %indvar.next8, %bb5 ], [ 0, %bb22 ]         ; <i64> [#uses=2]
+       %storemerge = getelementptr %struct.Lit** null, i64 %storemerge.rec             ; <%struct.Lit**> [#uses=2]
+       %1 = icmp ugt %struct.Lit** null, %storemerge           ; <i1> [#uses=1]
+       br i1 %1, label %bb5, label %bb22
+
+bb11:          ; preds = %bb22, %entry
+       %2 = load %struct.Cls** null, align 8           ; <%struct.Cls*> [#uses=0]
+       br label %bb22
+
+bb22:          ; preds = %bb11, %bb9
+       br i1 false, label %bb11, label %bb9
+}