Mark Dickinson <[email protected]> added the comment:
> I declare that this rule does not apply here ...
Clearly the gcc developers disagree. :-)
iwasawa:~ mdickinson$ cat test2.c
int is_positive_zero(double f) {
return *(long long*)&f == 0;
}
iwasawa:~ mdickinson$ gcc -fstrict-aliasing -O3 -Wall -Wextra -Wstrict-aliasing
-c test2.c
test2.c: In function ‘is_positive_zero’:
test2.c:2: warning: dereferencing type-punned pointer will break
strict-aliasing rules
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<http://bugs.python.org/issue14381>
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