[Bug debug/49888] VTA: -O2 -g variable value changes, it does not change in the source

["aoliva at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49888

--- Comment #6 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2012-06-22 01:33:27 UTC ---
Author: aoliva
Date: Fri Jun 22 01:33:21 2012
New Revision: 188869

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188869
Log:
PR debug/53671
PR debug/49888
* var-tracking.c (vt_init_cfa_base): Drop redundant recording of
CFA base.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/var-tracking.c

--- Comment #7 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2012-06-22 01:33:50 UTC ---
Author: aoliva
Date: Fri Jun 22 01:33:46 2012
New Revision: 188870

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188870
Log:
PR debug/53671
PR debug/49888
* var-tracking.c (vt_initialize): Record initial offset between
arg pointer and stack pointer.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/var-tracking.c

--- Comment #8 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2012-06-22 01:34:13 UTC ---
Author: aoliva
Date: Fri Jun 22 01:34:05 2012
New Revision: 188871

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188871
Log:
PR debug/53671
PR debug/49888
* var-tracking.c (vt_get_canonicalize_base): New.
(vt_canonicalize_addr, vt_stack_offset_p): New.
(vt_canon_true_dep): New.
(drop_overlapping_mem_locs): Use vt_canon_true_dep.
(clobber_overlaping_mems): Use vt_canonicalize_addr.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/var-tracking.c