[Bug rtl-optimization/17838] spills are not re-used

[tstdenis at elliptictech dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17838

--- Comment #10 from Tom St Denis <tstdenis at elliptictech dot com> 2011-11-15 14:20:07 UTC ---
Another update ... We've just profiled our crypto library and across the board
[cipher, hashes, PK functions like RSA/ECC] GCC is a complete loser against
ARMcc [r713].  And it's not that GCC is faster and that's at least a price
worth paying... In most cases ARMcc and GCC are dead even [arm faster for some
things, slower for others].

This is with gcc 4.4.5 and 4.5.1 on an ARM.

This is not a new bug.  This is not a "misfeature."  This is actually something
worth working on.  This was filed in 2004 and hasn't been addressed since ...
What is the hold up?  If GCC is to be used in embedded platforms it can't go
around taking 150% of the stack space as it's competitors...