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[Bug c++/56894] performance regression in gcc 4.7.x due to a += operation
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 10 Apr 2013 08:11:36 +0000
- Subject: [Bug c++/56894] performance regression in gcc 4.7.x due to a += operation
- Auto-submitted: auto-generated
- References: <bug-56894-4 at http dot gcc dot gnu dot org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56894
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> 2013-04-10 08:11:36 UTC ---
The regression was fixed for 4.8 with
2012-06-27 Richard Guenther <rguenther@suse.de>
PR middle-end/53676
* tree-chrec.c (chrec_convert_1): Represent truncation to
a type with undefined overflow as truncation to an unsigned
type converted to the type with undefined overflow.
* tree-scalar-evolution.c (interpret_rhs_expr): For computing
the scalar evolution of a truncated widened operation avoid
looking at the non-existing evolution of the widened operation
result.
which this bug is a duplicate of.
*** This bug has been marked as a duplicate of bug 53676 ***