1 // PR c++/34198
2 // { dg-do compile }
3 // { dg-options "-O2 -Wconversion -Wsign-conversion" }
4
5 signed char sc;
6 unsigned char uc;
7 short int ss;
8 unsigned short int us;
9 int si;
10 unsigned int ui;
11
test1(void)12 void 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 change value" }
23 unsigned char j = (unsigned int) (short int) us; // { dg-warning "may change value" }
24 signed char k = (int) (unsigned short int) ss; // { dg-warning "may change value" }
25 }
26
test2(void)27 void 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