[Bug rtl-optimization/37948] [4.4 Regression] IRA generates slower code

[hjl dot tools at gmail dot com]

------- Comment #7 from hjl dot tools at gmail dot com  2008-11-04 19:36 -------
IRA generates much slower codes:

[hjl@gnu-6 37364]$ make
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -m32  -fno-ira -o noira
foo.c
/export/build/gnu/gcc/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc/build-x86_64-linux/gcc/ -O2 -m32  -o ira foo.c
time ./noira
7.62user 0.01system 0:07.65elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+88minor)pagefaults 0swaps
time ./ira
7.81user 0.01system 0:07.83elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+87minor)pagefaults 0swaps
[hjl@gnu-6 37364]$ make
time ./noira
7.07user 0.01system 0:07.10elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+88minor)pagefaults 0swaps
time ./ira
7.96user 0.00system 0:07.97elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+87minor)pagefaults 0swaps
[hjl@gnu-6 37364]$ make
time ./noira
7.40user 0.00system 0:07.40elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+87minor)pagefaults 0swaps
time ./ira
7.81user 0.00system 0:07.82elapsed 99%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (0major+87minor)pagefaults 0swaps
[hjl@gnu-6 37364]$ 


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.4 Regression] IRA        |[4.4 Regression] IRA
                   |generates slower code for - |generates slower code
                   |mtune=core2                 |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37948