Compiler uses a lot of memory for large initialized arrays

Steven Bosscher stevenb@suse.de
Thu Dec 2 17:05:00 GMT 2004


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?

Gr.
Steven



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