>
> Here's my reduced testcase:
>
> typedef long GLint;
> extern void aglChoosePixelFormat(const GLint *);
> void find(const int *alistp) {
> const int *blist;
> int list[32];
> if (alistp)
> blist = alistp;
> else {
> list[3] = 42; /* this store disappears with -O1 -fstrict-
> aliasing */
> blist = list;
> }
> aglChoosePixelFormat((GLint*)blist);
> }
>
> (The original testcase is C++, from the FLTK project.)
>
> If I compile this with -O1 -fstrict-aliasing, the "= 42" store
> disappears. I've confirmed this on mainline PPC and x86.
>
> I'm not a language lawyer; is this a legal program? (If the program
> is legal, should I file a PR?)
This is legal as long as aglChoosePixelFormat only access it as int.
-- Pinski
