Re: [PATCH] ARM: Convert BUG() to use unreachable()

2009-12-17 Thread Jamie Lokier
Joe Buck wrote: > On Thu, Dec 17, 2009 at 11:06:13AM -0800, Russell King - ARM Linux wrote: > > On Thu, Dec 17, 2009 at 10:35:17AM -0800, Joe Buck wrote: > > > Besides, didn't I see a whole bunch of kernel security patches related > > > to null pointer dereferences lately? If page 0 can be mapped,

Re: [PATCH] ARM: Convert BUG() to use unreachable()

2009-12-17 Thread Jamie Lokier
Russell King - ARM Linux wrote: > Let me put it another way: I want this function to terminate with an > explicit NULL pointer dereference in every case. __builtin_trap cannot be used because the GCC manual says "The mechanism used may vary from release to release so you should not rely on any par

Re: From SSA back to GIMPLE.

2007-10-22 Thread Jamie Lokier
J.C. Pizarro wrote: > IMHO, in the future, GCC as a base an experimal compiler IS NOT good > because of enormeous complexities to design this optimizing compiler. > > My reasons to select a good base are: > > * the programming language to develop a complex optimizing compiler > MUST TO be high-le

Re: From SSA back to GIMPLE.

2007-10-22 Thread Jamie Lokier
Dave Korn wrote: > On 22 October 2007 19:32, skaller wrote: > > > On Mon, 2007-10-22 at 16:32 +0200, Paolo Bonzini wrote: > > > >> I don't know what you mean, but yes, there is value in going to SSA and > >> back. SSA makes global optimization much easier, and that's the main > >> improvement in