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 10 define 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 15 loop: 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 25 exit: 26 store i8 -128, i8* getelementptr inbounds (%struct.anon, %struct.anon* @a, i64 0, i32 0), align 1 27 ret i32 0 28 } 29
