/* When comparisons of bit-fields to unsigned constants got shortened, | |
the shortened signed constant was wrongly marked as overflowing, | |
leading to a later integer_zerop failure and misoptimization. | |
Related to bug tree-optimization/16437 but shows the problem on | |
32-bit systems. */ | |
/* Origin: Joseph Myers <jsm@polyomino.org.uk> */ | |
extern void abort (void); | |
struct s { int a:12, b:20; }; | |
struct s x = { -123, -456 }; | |
int | |
main (void) | |
{ | |
if (x.a != -123U || x.b != -456U) | |
abort (); | |
return 0; | |
} |