------- Comment #15 from hjl dot tools at gmail dot com  2010-04-29 01:20 
-------
Revision 139756:

http://gcc.gnu.org/ml/gcc-cvs/2008-08/msg01321.html

also contributed to this regression.

[...@gnu-26 rrs]$ ./131573/usr/bin/gcc -O3 pr43884.c
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.237s
user    0m3.236s
sys     0m0.000s
[...@gnu-26 rrs]$ ./131573/usr/bin/gcc -O3 pr43884.c -m32
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.667s
user    0m3.665s
sys     0m0.001s
[...@gnu-26 rrs]$ ./131576/usr/bin/gcc -O3 pr43884.c 
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.687s
user    0m3.685s
sys     0m0.000s
[...@gnu-26 rrs]$ ./131576/usr/bin/gcc -O3 pr43884.c -m32
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.685s
user    0m3.683s
sys     0m0.001s
[...@gnu-26 rrs]$ 

[...@gnu-26 rrs]$ ./139755/usr/bin/gcc -O3 pr43884.c 
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.261s
user    0m3.260s
sys     0m0.002s
[...@gnu-26 rrs]$ ./139755/usr/bin/gcc -O3 pr43884.c -m32
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.043s
user    0m3.041s
sys     0m0.001s
[...@gnu-26 rrs]$ ./139756/usr/bin/gcc -O3 pr43884.c 
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.909s
user    0m3.906s
sys     0m0.001s
[...@gnu-26 rrs]$ ./139756/usr/bin/gcc -O3 pr43884.c -m32
[...@gnu-26 rrs]$ time ./a.out 45
fib(45)=1134903170

real    0m3.883s
user    0m3.881s
sys     0m0.000s
[...@gnu-26 rrs]$ 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43884

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