------- Comment #3 from lucier at math dot purdue dot edu 2008-09-18 20:07
-------
Created an attachment (id=16358)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16358&action=view)
gprof output for the test case
The compiler (which was bootstrapped with BOOT_CFLAGS='-O2 -g -pg'):
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../../mainline/configure --with-gmp=/pkgs/gmp-4.2.2/
--with-mpfr=/pkgs/gmp-4.2.2/ --prefix=/pkgs/gcc-mainline --enable-languages=c
--enable-gather-detailed-mem-stats
Thread model: posix
gcc version 4.4.0 20080917 (experimental) [trunk revision 140425] (GCC)
GNU C (GCC) version 4.4.0 20080917 (experimental) [trunk revision 140425]
(x86_64-unknown-linux-gnu)
compiled by GNU C version 4.4.0 20080917 (experimental) [trunk revision
140425], GMP version 4.2.2, MPFR version 2.3.0-p4.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
the command line
/export/pkgs/gcc-mainline/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.4.0/cc1
-fpreprocessed all.i -quiet -dumpbase all.i -mtune=generic -auxbase all -O1
-Wall -W -Wno-unused -version -fno-math-errno -fschedule-insns2
-fno-trapping-math -fno-strict-aliasing -fwrapv -fomit-frame-pointer -fPIC
-ftime-report -fmem-report -o all.s >>& mainline-stats-2008-09-18
Highlights of the gprof output:
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
63.13 422.59 422.59 3 140.86 141.03 find_replaceable_exprs
-----------------------------------------------
422.59 0.50 3/3 rewrite_out_of_ssa [6]
[7] 63.2 422.59 0.50 3 find_replaceable_exprs [7]
0.20 0.30 63203/63203 find_replaceable_in_bb [290]
0.00 0.00 6/13254347 bitmap_obstack_free [162]
0.00 0.00 6/6476878 bitmap_obstack_alloc_stat
[339]
-----------------------------------------------
Doesn't tell me much ...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37567
