1 files changed, 39 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/sext-zero.ll b/test/Analysis/ScalarEvolution/sext-zero.ll
new file mode 100644
index 000000000000..cac42638e959
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/sext-zero.ll
@@ -0,0 +1,39 @@
+; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
+
+; CHECK:  %tmp9 = shl i64 %tmp8, 33
+; CHECK-NEXT:  -->  {{.*}} Exits: (-8589934592 + (8589934592 * (zext i32 %arg2 to i64)))
+; CHECK-NEXT:  %tmp10 = ashr exact i64 %tmp9, 0
+; CHECK-NEXT:  -->  {{.*}} Exits: (-8589934592 + (8589934592 * (zext i32 %arg2 to i64)))
+
+define void @foo(i32* nocapture %arg, i32 %arg1, i32 %arg2) {
+bb:
+  %tmp = icmp sgt i32 %arg2, 0
+  br i1 %tmp, label %bb3, label %bb6
+
+bb3:                                              ; preds = %bb
+  %tmp4 = zext i32 %arg2 to i64
+  br label %bb7
+
+bb5:                                              ; preds = %bb7
+  br label %bb6
+
+bb6:                                              ; preds = %bb5, %bb
+  ret void
+
+bb7:                                              ; preds = %bb7, %bb3
+  %tmp8 = phi i64 [ %tmp18, %bb7 ], [ 0, %bb3 ]
+  %tmp9 = shl i64 %tmp8, 33
+  %tmp10 = ashr exact i64 %tmp9, 0
+  %tmp11 = getelementptr inbounds i32, i32* %arg, i64 %tmp10
+  %tmp12 = load i32, i32* %tmp11, align 4
+  %tmp13 = sub nsw i32 %tmp12, %arg1
+  store i32 %tmp13, i32* %tmp11, align 4
+  %tmp14 = or i64 %tmp10, 1
+  %tmp15 = getelementptr inbounds i32, i32* %arg, i64 %tmp14
+  %tmp16 = load i32, i32* %tmp15, align 4
+  %tmp17 = mul nsw i32 %tmp16, %arg1
+  store i32 %tmp17, i32* %tmp15, align 4
+  %tmp18 = add nuw nsw i64 %tmp8, 1
+  %tmp19 = icmp eq i64 %tmp18, %tmp4
+  br i1 %tmp19, label %bb5, label %bb7
+}