[Bug rtl-optimization/52983] [4.8 Regression] internal compiler error: in df_uses_record, at df-scan.c:3243

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52983

--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2012-06-28 07:39:33 UTC ---
Author: aoliva
Date: Thu Jun 28 07:39:25 2012
New Revision: 189036

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=189036
Log:
PR debug/53740
PR debug/52983
PR debug/48866
* dce.c (word_dce_process_block): Check whether inserting debug
temps are needed even for needed insns.
(dce_process_block): Likewise.
* df-problems.c (dead_debug_add): Add comment about multi-regs.
(dead_debug_insert_temp): Likewise.  Don't subreg when we're
setting fewer regs than a multi-reg requires.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dce.c
    trunk/gcc/df-problems.c