1; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
2
3%struct.anon = type { i8 }
4%struct.S = type { i32 }
5
6@a = common global %struct.anon zeroinitializer, align 1
7@b = common global %struct.S zeroinitializer, align 4
8
9; Function Attrs: nounwind ssp uwtable
10define i32 @main() {
11; CHECK-LABEL: Classifying expressions for: @main
12  store i8 0, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1
13  br label %loop
14
15loop:
16  %storemerge1 = phi i8 [ 0, %0 ], [ %inc, %loop ]
17  %m = load volatile i32, i32* getelementptr inbounds (%struct.S, %struct.S* @b, i64 0, i32 0), align 4
18  %inc = add nuw i8 %storemerge1, 1
19; CHECK:   %inc = add nuw i8 %storemerge1, 1
20; CHECK-NEXT: -->  {1,+,1}<nuw><%loop>
21; CHECK-NOT: -->  {1,+,1}<nuw><nsw><%loop>
22  %exitcond = icmp eq i8 %inc, -128
23  br i1 %exitcond, label %exit, label %loop
24
25exit:
26  store i8 -128, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1
27  ret i32 0
28}
29