patch to fix PR57468

Vladimir Makarov vmakarov@redhat.com
Thu Jun 6 21:19:00 GMT 2013


The following patch fixes

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57468

The patch actually restore the LRA behaviour for x86/x86-64 before rev. 
199298.  The revision was added for PPC SDmode value correct 
generation.  So it is really needed for PPC64 and badly hurts x86/x86-64 
performance (by doing secondary memory reloads when one pseudo is spilled).

The patch was successfully bootstrapped and tested on x86/x86-64 (with 
patch for pr57459).

   Although the change in i386.c, it only concerns to LRA.  So I've 
decided to commit it without x86/x86-64 maintainer approval.  May be I 
am wrong in this situation.  If somebody objects I am ready to revert 
the patch and wait for an approval.

Committed as rev. 199764.

2013-06-06  Vladimir Makarov  <vmakarov@redhat.com>

         PR rtl-optimization/57468
         * config/i386/i386.c (inline_secondary_memory_needed): Ignore
         spilled pseudos.






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