[Bug regression/39914] [4.4/4.5 Regression] 96% performance regression in floating point code; part of the problem started 2009/03/12-13

[lucier at math dot purdue dot edu]

------- Comment #11 from lucier at math dot purdue dot edu  2009-04-27 20:37 
-------
As far as I can tell, the patch proposed by Uros restores the performance of
code generated by

gcc version 4.4.0 20090312 (experimental) [trunk revision 144812] (GCC) 

In particular, the assembly code for the main loop is identical for code
generated by

gcc version 4.4.0 20090312 (experimental) [trunk revision 144801] (GCC) 

and by

gcc version 4.4.0 20090312 (experimental) [trunk revision 144812] (GCC) 

after his patch.

Thanks for getting to this so quickly.

Brad


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39914