/* { dg-do compile } */ | |
/* { dg-options "-O2 -fdump-tree-original" } */ | |
/* x & ~(x & y) -> x & ~y */ | |
int fn1 (int x, int y) | |
{ | |
return x & ~(x & y); | |
} | |
int fn2 (int x, int y) | |
{ | |
return ~(x & y) & x; | |
} | |
int fn3 (int x, int y) | |
{ | |
return x & ~(y & x); | |
} | |
int fn4 (int x, int y) | |
{ | |
return ~(y & x) & x; | |
} | |
int fn5 (int z) | |
{ | |
return z & ~(z & 3); | |
} | |
int fn6 (int z) | |
{ | |
return ~(z & 3) & z; | |
} | |
/* { dg-final { scan-tree-dump-times "~y & x" 4 "original" } } */ | |
/* { dg-final { scan-tree-dump-times "z & -4" 2 "original" } } */ |