-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 04/08/11 08:39, Richard Guenther wrote: > On Fri, Apr 8, 2011 at 4:36 PM, Jeff Law <l...@redhat.com> wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> On 04/08/11 07:21, Laurynas Biveinis wrote: >>> 2011/4/8 Steven Bosscher <stevenb....@gmail.com>: >>>>> * stmt.c (label_rtx): Allocate RTX in permanent RTL memory. >>>> >>>> That looks strange, labels should be function specific, except >>>> non-local labels. Maybe you can get away with allocating DECL_NONLOCAL >>>> labels on the permanent rtl obstack? >>> >>> That's a good idea, I will try it once things are stable on the branch. >>> >>>> Perhaps a third, per-translation-unit obstack is necessary? >>> >>> Perhaps. After I finish with permanent rtl obstack, I will measure how >>> large it gets and if it's worthwhile to split out >>> per-translation-obstack out of it. >> And then you'll want a per-statement obstack, then per-expression >> obstack, and before you know it, GCC looks much like it did 20 years ago. >> >> Sigh. > > I remember it was fast at that time though ;) Yea, fast to segfault dereferencing a dangling pointer due to placing an object on the wrong obstack. And fast because we didn't have a good way to keep most expressions beyond the lifetime of a single statement thus preventing any kind of higher level analysis and optimization.
Jeff -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJNnx7OAAoJEBRtltQi2kC7cLQH/RDU86grC6BTnVc9iG5KE4zu B+YP0+42dJfrinjL0cqkPeEprTr5j144XJYujsxT49f7G+qu1qX+gzyfowgTdOwb dIfhnWXoC9d09E0nXD+mLVwHwNwsrkv1loN501wryPksSOsgjxjhwc7TCW8WnW93 2sjrpKLg0qvy+/8KH0RTA80q9xehGkfqux3y4ZbNLsPBreYp+jhTzsVqjxk+T0F7 Ges5PFLjXwQdbx+iFBStQhlZHf8A/3TRXnrfllPRRl37bzR56Jnza2ag8EkVHwXi 5bNQ+YWqJXHiKG2nInARTNGnJXQU8XMGYYaZTx1Myl0c8osAlfu0QwLHrJn+Few= =4X+7 -----END PGP SIGNATURE-----
