[Bug tree-optimization/90768] better range analysis for converting bit tests into less-than greater-than
pinskia at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Sun Sep 5 08:32:19 GMT 2021
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90768
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |enhancement
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Just to make things clean these two functions should produce the same code:
#include <stdint.h>
#include <stdlib.h>
int bcmp_1(char *a, char *b, size_t s) {
if (s < 16) {
if (s >= 8)
if (*(uint64_t *)a != *(uint64_t *)b)
return 1;
}
return 0;
}
int bcmp_2(char *a, char *b, size_t s) {
if (s < 16) {
if (s & 8)
if (*(uint64_t *)a != *(uint64_t *)b)
return 1;
}
return 0;
}
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