1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -Wconversion -verify %s 2 3 #include <stddef.h> 4 5 typedef signed char int8_t; 6 typedef signed short int16_t; 7 typedef signed int int32_t; 8 typedef signed long int64_t; 9 10 typedef unsigned char uint8_t; 11 typedef unsigned short uint16_t; 12 typedef unsigned int uint32_t; 13 typedef unsigned long uint64_t; 14 15 // <rdar://problem/7909130> 16 namespace test0 { 17 int32_t test1_positive(char *I, char *E) { 18 return (E - I); // expected-warning {{implicit conversion loses integer precision}} 19 } 20 21 int32_t test1_negative(char *I, char *E) { 22 return static_cast<int32_t>(E - I); 23 } 24 25 uint32_t test2_positive(uint64_t x) { 26 return x; // expected-warning {{implicit conversion loses integer precision}} 27 } 28 29 uint32_t test2_negative(uint64_t x) { 30 return (uint32_t) x; 31 } 32 } 33 34 namespace test1 { 35 uint64_t test1(int x, unsigned y) { 36 return sizeof(x == y); 37 } 38 39 uint64_t test2(int x, unsigned y) { 40 return __alignof(x == y); 41 } 42 43 void * const foo(); 44 bool test2(void *p) { 45 return p == foo(); 46 } 47 } 48 49 namespace test2 { 50 struct A { 51 unsigned int x : 2; 52 A() : x(10) {} // expected-warning {{implicit truncation from 'int' to bitfield changes value from 10 to 2}} 53 }; 54 } 55 56 void test3() { 57 int a = NULL; // expected-warning {{implicit conversion of NULL constant to integer}} 58 int b; 59 b = NULL; // expected-warning {{implicit conversion of NULL constant to integer}} 60 int c = ((((NULL)))); // expected-warning {{implicit conversion of NULL constant to integer}} 61 int d; 62 d = ((((NULL)))); // expected-warning {{implicit conversion of NULL constant to integer}} 63 } 64
