1/* PR c++/34198 */ 2/* { dg-do compile } */ 3/* { dg-options "-O2 -Wconversion" } */ 4 5signed char sc; 6unsigned char uc; 7short int ss; 8unsigned short int us; 9int si; 10unsigned int ui; 11 12void test1 (void) 13{ 14 int a = uc & 0xff; 15 int b = sc & 0x7f; 16 int c = 0xff & uc; 17 int d = 0x7f & sc; 18 int e = uc & sc; 19 unsigned char f = (int) uc; 20 signed char g = (int) sc; 21 unsigned char h = (unsigned int) (short int) uc; 22 signed char i = (int) (unsigned short int) sc; /* { dg-warning "may alter its value" "" { target { int32plus } } } */ 23 unsigned char j = (unsigned int) (short int) us; /* { dg-warning "may alter its value" } */ 24 signed char k = (int) (unsigned short int) ss; /* { dg-warning "may alter its value" } */ 25} 26 27void test2 (void) 28{ 29 signed char a = (unsigned char) sc; /* { dg-warning "may change the sign" } */ 30 unsigned char b = (signed char) uc; /* { dg-warning "may change the sign" } */ 31 signed char c = (int) (unsigned char) sc; /* { dg-warning "may change the sign" } */ 32 unsigned char d = (int) (signed char) uc; /* { dg-warning "may change the sign" } */ 33 int e = (unsigned int) si; /* { dg-warning "may change the sign" } */ 34 unsigned int f = (int) ui; /* { dg-warning "may change the sign" } */ 35} 36