[Bug middle-end/17503] [4.0 Regression] Huge performance regression in invalid_mode_change_p

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-09-15 17:49 -------
Most likely caused by:
2004-09-14  Roger Sayle  <roger@eyesopen.com>

        PR rtl-optimization/9771
        * regclass.c (CALL_REALLY_USED_REGNO_P): New macro to eliminate
        conditional compilation in init_reg_sets_1.
        (init_reg_sets_1): Let global_regs[i] take priority over the frame
        (but not stack) pointer exceptions to regs_invalidated_by_call.
        (globalize_reg): Globalizing a fixed register may need to update
        regs_invalidated_by_call.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |roger at eyesopen dot com
           Severity|normal                      |critical
          Component|target                      |middle-end
           Keywords|                            |compile-time-hog
            Summary|Huge performance regression |[4.0 Regression] Huge
                   |in invalid_mode_change_p    |performance regression in
                   |                            |invalid_mode_change_p
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17503