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Re: Compiler uses a lot of memory for large initialized arrays
On Thu, 2 Dec 2004 18:05:17 +0100 (CET), Steven Bosscher
<stevenb@suse.de> wrote:
> On Dec 02, 2004 05:34 PM, Joseph S. Myers <joseph@codesourcery.com> wrote:
>
> > On Thu, 2 Dec 2004, Ian Lance Taylor wrote:
> >
> > > This test case works fine with 2.95.3. Looking into the patches I
> > > came across this note from you from four years ago:
> > > http://gcc.gnu.org/ml/gcc-patches/2000-10/msg00937.html
> >
> > And hopefully you came across the November part of the thread as well: C99
> > designated initializers allow
> >
> > int i[10000000] = { 0, 1, 2, 3, 4, 5, /* ... */
> > 9999998, 9999999, [0] = -1 };
> >
> > which stops optimizing in the simplest way by writing out initializers to
> > the assembler output before the whole initializer has been parsed.
>
> Ouch.
>
> Do we disable this if -std!=c99?
Or can't we seek in the asm output and overwrite previously written values?
Might be slow, though.
Richard.