target/9929: [3.3/3.4 regression] Can't find spill register

[Janis Johnson]

The following reply was made to PR target/9929; it has been noted by GNATS.

From: Janis Johnson <janis187@us.ibm.com>
To: Steven Bosscher <s.bosscher@student.tudelft.nl>
Cc: gabor@mac.com, gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org,
   nobody@gcc.gnu.org, gcc-prs@gcc.gnu.org, janis187@us.ibm.com, jh@suse.cz
Subject: Re: target/9929: [3.3/3.4 regression] Can't find spill register
Date: Mon, 24 Mar 2003 14:04:19 -0800

 On Mon, Mar 24, 2003 at 09:00:40PM +0100, Steven Bosscher wrote:
 > 
 > Janis, can you hunt this one?
 
 The regression showed up with this patch:
 
 Sat Mar 30 14:08:55 CET 2002  Jan Hubicka  <jh@suse.cz>
 
 	* local-alloc.c (local_alloc): Avoid call of update_equiv_regs
 	when not optimizing.
 
 	* toplev.c (rest_of_compilation): Cann mark_constant_function
 	only when optimizing.
 
 	* flow.c (calculate_global_regs_live): Ensure that all AUX fields
 	are NULL.
 
 	* cfgcleanup.c (bb_flags): Add BB_NONTHREADABLE_BLOCK.
 	(thread_jump): Set BB_NONTHREADABLE_BLOCK, check it.
 	(try_optimize_cfg): clear all AUX fields.
 
 	* i386.c (aligned_operand): Be prepared for SUBREGed registers.
 	(ix86_decompose_address): Use REG_P instead of GET_CODE (...) == REG.
 	(ix86_address_cost): Be prepared for SUBREGed registers.
 	(legitimate_address_p): Accept SUBREGed registers.
 
 The hunt used Wolfgang's reduced test case with "-O -fPIC" on
 i686-pc-linux-gnu.