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[Bug middle-end/17503] [4.0 Regression] Huge performance regression in invalid_mode_change_p
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Sep 2004 17:49:35 -0000
- Subject: [Bug middle-end/17503] [4.0 Regression] Huge performance regression in invalid_mode_change_p
- References: <20040915165050.17503.drow@gcc.gnu.org>
- Reply-to: gcc-bugzilla 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