[Bug target/31850] gcc.c-torture/compile/limits-fnargs.c is slow at compiling for spu-elf

sje at cup dot hp dot com gcc-bugzilla@gcc.gnu.org
Wed May 9 21:05:00 GMT 2007



------- Comment #5 from sje at cup dot hp dot com  2007-05-09 22:05 -------
It looks like the slowdown in limits-fndefn.c is different than the slowdown
for limits-fnargs.c.  The compilation time in limits-fndefn.c is spent in
push_to_sequence.  The problem is that each (32 bit) argument is generating a
conversion operand (to 64 bits) and these conversions are getting put in
all->conversion_insns.  Then we call push_to_sequence with
all->conversion_insns and each time we call it the list of instructions is
longer and push_to_sequence does a walk through the entire list each time it is
called, getting slower and slower and slower.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31850



More information about the Gcc-bugs mailing list