1 // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -ftrapv %s -emit-llvm -o - | FileCheck %s
2 
3 unsigned int ui, uj, uk;
4 int i, j, k;
5 
6 // CHECK: define void @test0()
7 void test0() {
8   // -ftrapv doesn't affect unsigned arithmetic.
9   // CHECK:      [[T1:%.*]] = load i32* @uj
10   // CHECK-NEXT: [[T2:%.*]] = load i32* @uk
11   // CHECK-NEXT: [[T3:%.*]] = add i32 [[T1]], [[T2]]
12   // CHECK-NEXT: store i32 [[T3]], i32* @ui
13   ui = uj + uk;
14 
15   // CHECK:      [[T1:%.*]] = load i32* @j
16   // CHECK-NEXT: [[T2:%.*]] = load i32* @k
17   // CHECK-NEXT: [[T3:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[T1]], i32 [[T2]])
18   // CHECK-NEXT: [[T4:%.*]] = extractvalue { i32, i1 } [[T3]], 0
19   // CHECK-NEXT: [[T5:%.*]] = extractvalue { i32, i1 } [[T3]], 1
20   // CHECK-NEXT: br i1 [[T5]]
21   // CHECK:      call void @llvm.trap()
22   i = j + k;
23 }
24 
25 // CHECK: define void @test1()
26 void test1() {
27   extern void opaque(int);
28   opaque(i++);
29 
30   // CHECK:      [[T1:%.*]] = load i32* @i
31   // CHECK-NEXT: [[T2:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[T1]], i32 1)
32   // CHECK-NEXT: [[T3:%.*]] = extractvalue { i32, i1 } [[T2]], 0
33   // CHECK-NEXT: [[T4:%.*]] = extractvalue { i32, i1 } [[T2]], 1
34   // CHECK-NEXT: br i1 [[T4]]
35   // CHECK:      call void @llvm.trap()
36 }
37 
38 // CHECK: define void @test2()
39 void test2() {
40   extern void opaque(int);
41   opaque(++i);
42 
43   // CHECK:      [[T1:%.*]] = load i32* @i
44   // CHECK-NEXT: [[T2:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[T1]], i32 1)
45   // CHECK-NEXT: [[T3:%.*]] = extractvalue { i32, i1 } [[T2]], 0
46   // CHECK-NEXT: [[T4:%.*]] = extractvalue { i32, i1 } [[T2]], 1
47   // CHECK-NEXT: br i1 [[T4]]
48   // CHECK:      call void @llvm.trap()
49 }
50