[Bug middle-end/16266] [4.0 regression] gcc.dg/c99-intconst-1.c compilation is very slow

[amylaar at spamcop dot net]

------- Additional Comments From amylaar at spamcop dot net  2004-10-08 09:17 -------
Subject: Re:  [4.0 regression] gcc.dg/c99-intconst-1.c compilation is very slow

> 
> 
> ------- Additional Comments From giovannibajo at libero dot it  2004-10-06 23:19 -------
> I cannot reproduce this on mainline 20040923 on x86-linux with a disable 
> checking compiler. So either:
> 
> - the bug is already fixed

It is not fixed.  This is on an Athlon XP 2800+ (Barton core, 2.08 GHz, dual
channel DDR CL 2.5), while the previous timings were for one of two
Athlon MP 1600+ (1.4 GHz):

amylaar@meolyon:/swbuild/nightly/2004-10-08/sh-elf/gcc/testsuite> time /swbuild/nightly/2004-10-08/sh-elf/gcc/cc1 -fpreprocessed c99-intconst-1.i -dumpbase c99-intconst-1.c -auxbase-strip c99-intconst-1.s -pedantic-errors -std=iso9899:1999 -version -o c99-intconst-1.s
GNU C version 4.0.0 20041008 (experimental) (sh-elf)
        compiled by GNU C version 3.2.2.
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
options passed:  -fpreprocessed -auxbase-strip -pedantic-errors
 -std=iso9899:1999
options enabled:  -falign-loops -fargument-alias -fbranch-count-reg
 -fcommon -feliminate-unused-debug-types -ffunction-cse -fgcse-lm -fident
 -fivopts -fkeep-static-consts -fleading-underscore -floop-optimize2
 -fmath-errno -fpeephole -freg-struct-return -fsched-interblock
 -fsched-spec -fsched-stalled-insns-dep -fsplit-ivs-in-unroller
 -ftrapping-math -ftree-loop-im -ftree-loop-ivcanon -ftree-loop-optimize
 -fvar-tracking -fzero-initialized-in-bss -m1
 foo
 {GC 29627k -> 17760k} {GC 32165k -> 30300k} {GC 47313k -> 37867k}
Execution times (seconds)
 garbage collection    :   0.54 ( 0%) usr   0.00 ( 0%) sys   0.54 ( 0%) wall
 CFG verifier          :   0.25 ( 0%) usr   0.00 ( 0%) sys   0.25 ( 0%) wall
 trivially dead code   :   0.04 ( 0%) usr   0.00 ( 0%) sys   0.04 ( 0%) wall
 life analysis         :   0.20 ( 0%) usr   0.00 ( 0%) sys   0.20 ( 0%) wall
 life info update      :   0.09 ( 0%) usr   0.00 ( 0%) sys   0.09 ( 0%) wall
 register scan         :   0.05 ( 0%) usr   0.00 ( 0%) sys   0.05 ( 0%) wall
 rebuild jump labels   :   0.03 ( 0%) usr   0.00 ( 0%) sys   0.03 ( 0%) wall
 preprocessing         :   0.45 ( 0%) usr   0.33 (22%) sys   0.78 ( 1%) wall
 lexical analysis      :   0.45 ( 0%) usr   0.53 (36%) sys   0.98 ( 1%) wall
 parser                :   1.06 ( 1%) usr   0.37 (25%) sys   1.43 ( 1%) wall
 tree gimplify         :   0.14 ( 0%) usr   0.00 ( 0%) sys   0.14 ( 0%) wall
 tree eh               :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) wall
 tree CFG construction :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) wall
 tree STMT verifier    :   0.04 ( 0%) usr   0.00 ( 0%) sys   0.04 ( 0%) wall
 expand                :  48.52 (40%) usr   0.10 ( 7%) sys  49.84 (40%) wall
 jump                  :   0.03 ( 0%) usr   0.00 ( 0%) sys   0.03 ( 0%) wall
 flow analysis         :   0.04 ( 0%) usr   0.00 ( 0%) sys   0.04 ( 0%) wall
 local alloc           :   1.34 ( 1%) usr   0.04 ( 3%) sys   1.38 ( 1%) wall
 global alloc          :  65.86 (55%) usr   0.08 ( 5%) sys  66.21 (54%) wall
 flow 2                :   0.02 ( 0%) usr   0.00 ( 0%) sys   0.02 ( 0%) wall
 machine dep reorg     :   0.59 ( 0%) usr   0.01 ( 1%) sys   0.60 ( 0%) wall
 shorten branches      :   0.27 ( 0%) usr   0.00 ( 0%) sys   0.27 ( 0%) wall
 final                 :   0.39 ( 0%) usr   0.00 ( 0%) sys   0.40 ( 0%) wall
 symout                :   0.00 ( 0%) usr   0.02 ( 1%) sys   0.02 ( 0%) wall
 rest of compilation   :   0.24 ( 0%) usr   0.00 ( 0%) sys   0.24 ( 0%) wall
 TOTAL                 : 120.67             1.49           123.66
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --disable-checking to disable checks.

real    2m3.673s
user    2m0.670s
sys     0m1.490s


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16266