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      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: [[T6:%.*]] = xor i1 [[T5]], true
     21   // CHECK-NEXT: br i1 [[T6]]
     22   // CHECK:      call void @llvm.trap()
     23   i = j + k;
     24 }
     25 
     26 // CHECK: define void @test1()
     27 void test1() {
     28   extern void opaque(int);
     29   opaque(i++);
     30 
     31   // CHECK:      [[T1:%.*]] = load i32* @i
     32   // CHECK-NEXT: [[T2:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[T1]], i32 1)
     33   // CHECK-NEXT: [[T3:%.*]] = extractvalue { i32, i1 } [[T2]], 0
     34   // CHECK-NEXT: [[T4:%.*]] = extractvalue { i32, i1 } [[T2]], 1
     35   // CHECK-NEXT: [[T5:%.*]] = xor i1 [[T4]], true
     36   // CHECK-NEXT: br i1 [[T5]]
     37   // CHECK:      call void @llvm.trap()
     38 }
     39 
     40 // CHECK: define void @test2()
     41 void test2() {
     42   extern void opaque(int);
     43   opaque(++i);
     44 
     45   // CHECK:      [[T1:%.*]] = load i32* @i
     46   // CHECK-NEXT: [[T2:%.*]] = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 [[T1]], i32 1)
     47   // CHECK-NEXT: [[T3:%.*]] = extractvalue { i32, i1 } [[T2]], 0
     48   // CHECK-NEXT: [[T4:%.*]] = extractvalue { i32, i1 } [[T2]], 1
     49   // CHECK-NEXT: [[T5:%.*]] = xor i1 [[T4]], true
     50   // CHECK-NEXT: br i1 [[T5]]
     51   // CHECK:      call void @llvm.trap()
     52 }
     53 
     54 // CHECK: define void @test3(
     55 void test3(int a, int b, float c, float d) {
     56   // CHECK-NOT:  @llvm.trap
     57   (void)(a / b);
     58   (void)(a % b);
     59   (void)(c / d);
     60   // CHECK: }
     61 }
     62