1 files changed, 28 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/pr22179.ll b/test/Analysis/ScalarEvolution/pr22179.ll
new file mode 100644
index 0000000..d9fb510
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/pr22179.ll
@@ -0,0 +1,28 @@
+; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
+
+%struct.anon = type { i8 }
+%struct.S = type { i32 }
+
+@a = common global %struct.anon zeroinitializer, align 1
+@b = common global %struct.S zeroinitializer, align 4
+
+; Function Attrs: nounwind ssp uwtable
+define i32 @main() {
+; CHECK-LABEL: Classifying expressions for: @main
+  store i8 0, i8* getelementptr inbounds (%struct.anon* @a, i64 0, i32 0), align 1
+  br label %loop
+
+loop:
+  %storemerge1 = phi i8 [ 0, %0 ], [ %inc, %loop ]
+  %m = load volatile i32* getelementptr inbounds (%struct.S* @b, i64 0, i32 0), align 4
+  %inc = add nuw i8 %storemerge1, 1
+; CHECK:   %inc = add nuw i8 %storemerge1, 1
+; CHECK-NEXT: -->  {1,+,1}<nuw><%loop>
+; CHECK-NOT: -->  {1,+,1}<nuw><nsw><%loop>
+  %exitcond = icmp eq i8 %inc, -128
+  br i1 %exitcond, label %exit, label %loop
+
+exit:
+  store i8 -128, i8* getelementptr inbounds (%struct.anon* @a, i64 0, i32 0), align 1
+  ret i32 0
+}