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[Bug debug/52001] [4.7 Regression] Huge compile-time regression with var-tracking
- From: "gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 29 Feb 2012 11:30:14 +0000
- Subject: [Bug debug/52001] [4.7 Regression] Huge compile-time regression with var-tracking
- Auto-submitted: auto-generated
- References: <bug-52001-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52001
Georg-Johann Lay <gjl at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |gjl at gcc dot gnu.org
--- Comment #7 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-02-29 11:30:14 UTC ---
(In reply to comment #6)
> Author: aoliva
> Date: Sat Feb 25 12:09:41 2012
> New Revision: 184572
>
> URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184572
> Log:
> PR debug/52001
> * alias.c (refs_newer_value_cb, refs_newer_value_p): New.
> (get_addr): Walk canonical value's locs. Avoid returning VALUEs
> and locs that reference values newer than the non-canonical value
> at hand. Return the canonical value as a worst case.
> (memrefs_conflict_p): Walk canonical value's locs.
>
> Modified:
> trunk/gcc/ChangeLog
> trunk/gcc/alias.c
This caused PR52417.
With alias.c at r184571 the compiler does not enter infinite loop.