3 unsigned char U8;  variable
8     U8 = S; // expected-warning {{Loss of sign in implicit conversion}}  in assign()
12     U8 = S; // no-warning  in assign()
20   U8 += L; // expected-warning {{Loss of precision in implicit conversion}}  in addAssign()
27   U8 -= L; // expected-warning {{Loss of precision in implicit conversion}}  in subAssign()
34   U8 *= L; // expected-warning {{Loss of precision in implicit conversion}}  in mulAssign()
43   U8 /= L; // no-warning  in divAssign()
50   U8 %= L; // no-warning  in remAssign()
57   U8 &= L; // no-warning  in andAssign()
64   U8 |= L; // expected-warning {{Loss of precision in implicit conversion}}  in orAssign()
71   U8 ^= L; // expected-warning {{Loss of precision in implicit conversion}}  in xorAssign()
106   U8 = S; // It might be known that S is always 0x00-0xff.  in dontwarn1()
109   U8 = -1;  // Explicit conversion.  in dontwarn1()
112     U8 &= U; // No loss of precision since there is &=.  in dontwarn1()
127 #define DOSTUFF ({ unsigned X = 1000; U8 = X; })
137   U8 = S + 10;  in dontwarn5()