Optimizing for code size: new PR about issues with code hoisting

2007-10-20 Thread Steven Bosscher
Hello, Earlier this year, I had a chat with Richard Earnshaw about code size optimizations in GCC. I'm of the opinion that GCC should be able to do better, if a small number of obvious shortcomings would be fixed. There are many passes that matter for code size, which are currently rather impaire

one question: tree-ssa vs no tree-ssa? no such global optimization exists.

2007-10-20 Thread J.C. Pizarro
* Was it useful the implementation of the complicated tree-ssa code waited for long time (many years)? * Was it better the optimization without tree-ssa code? If doesn't exist a method for global optimization to use tree-ssa then * why did not it implement the simplest trial-and-error method for

(libgcc) what does _Unwind_Resume do ?

2007-10-20 Thread Sunzir Deepur
Hi, I have noticed that glibc has extensive use of the _Unwind_Resume procedure (from libgcc_eh.a) but I have failed to understand it (no luck with the onlinedocs: http://gcc.gnu.org/onlinedocs/gccint/Exception-handling-routines.html#Exception-handling-routines). Can anyone please explain me what

Re: Optimizing for code size: new PR about issues with code hoisting

2007-10-20 Thread Chris Lattner
On Oct 20, 2007, at 4:48 AM, Steven Bosscher wrote: I hope the list is useful for someone who wishes to improve GCC's optimizations for code size. Is there a meta bug for code size optimizations? If not, that would be a good way to centralize the various ideas you have. -Chris

Fw[1]:

2007-10-20 Thread lew chang-ji
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Re: gomp slowness

2007-10-20 Thread Tomash Brechko
I'm not sure what OpenMP spec says about default data scope (too lazy to read through), but it seems that examples from http://kallipolis.com/openmp/2.html assume default(private), while GCC GOMP defaults to shared. In your case, #pragma omp parallel for shared(A, row, col) for (i = k+1; i

Re: gcc mirror

2007-10-20 Thread Gerald Pfeifer
On Wed, 10 Oct 2007, [EMAIL PROTECTED] wrote: > I estabilished an http mirror via rsync, updated four times a day with a > cron job, located in Utah (US), available at the URL > "http://gcc.bigsearcher.com/";, from my server bigsearcher.com; > Please add this mirror to the list of available mirror

Re: Optimizing for code size: new PR about issues with code hoisting

2007-10-20 Thread Steven Bosscher
On 10/20/07, Chris Lattner <[EMAIL PROTECTED]> wrote: > > On Oct 20, 2007, at 4:48 AM, Steven Bosscher wrote: > > > I hope the list is useful for someone who wishes to improve GCC's > > optimizations for code size. > > Is there a meta bug for code size optimizations? Yes there is. I made it depen

Re: gomp slowness

2007-10-20 Thread skaller
On Sat, 2007-10-20 at 22:32 +0400, Tomash Brechko wrote: > I'm not sure what OpenMP spec says about default data scope (too lazy > to read through), > but it seems that examples from > http://kallipolis.com/openmp/2.html assume default(private), while GCC > GOMP defaults to shared. In your case

Re: indirect memory op in SSA

2007-10-20 Thread Diego Novillo
On 10/18/07, Fran Baena <[EMAIL PROTECTED]> wrote: > My questions are: are nodes STRUCT_FIELD_TAG, NAME_MEMORY_TAG, > SYMBOL_MEMORY_TAG used for that purpose? and, where i can find > documentation about their use within the translation process to SSA? Yes and no. S_F_T is used to implement field