[Bug rtl-optimization/16028] Bad code gen for vector code with -O3 (caused by GRA/reload)

[fjahanian at apple dot com]

------- Additional Comments From fjahanian at apple dot com  2004-06-17 16:39 -------
I looked at the follow-up thread and used the modified patch, very similar to yours.
FYI, this patch passed bootstrap and dejagnu tests on ppc-darwin. How ever, We are all still
concerned with performance implications of this change. I plan to run SPEC with this patch 
on a G5 machine and see if it shows any regressions.

RCS file: /cvs/gcc/gcc/gcc/reload1.c,v
retrieving revision 1.346.2.33.2.1
diff -c -p -r1.346.2.33.2.1 reload1.c
*** reload1.c   7 Jun 2004 17:05:08 -0000       1.346.2.33.2.1
--- reload1.c   17 Jun 2004 16:35:02 -0000
*************** choose_reload_regs (struct insn_chain *c
*** 5654,5664 ****
                                                           i);
                    }
  
!                 if ((regs_used
!                      && ! free_for_value_p (regno, rld[r].mode,
!                                             rld[r].opnum, rld[r].when_needed,
!                                             rld[r].in, rld[r].out, r, 1))
!                     || bad_for_class)
                    equiv = 0;
                }
  
--- 5654,5665 ----
                                                           i);
                    }
  
!                   if (bad_for_class
!                       || ! free_for_value_p (regno, rld[r].mode,
!                                              rld[r].opnum, rld[r].when_needed,
!                                              rld[r].in, rld[r].out, r, 1))
                    equiv = 0;
                }


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16028