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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/61010] [4.8/4.9/4.10 Regression] Infinite recursion in fold
Date: Wed, 30 Apr 2014 10:18:00 -0000 [thread overview]
Message-ID: <bug-61010-4-zyMHK4XwWg@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-61010-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=61010
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
/* If X is a tree of the form (Y * K1) & K2, this might conflict
with that optimization from the BIT_AND_EXPR optimizations.
This could end up in an infinite recursion. */
doesn't trigger because we have an intermediate cast to unsigned (which is
dropped) around the multiplication.
rev. 130635 which introduced that limitation on reducing the number of bits
suggests that we want to apply the same heuristic to the BIT_AND_EXPR
folding. Jakub, any opinion?
next prev parent reply other threads:[~2014-04-30 10:18 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-30 2:02 [Bug tree-optimization/61010] New: ICE in gcc.c ishiura-compiler at ml dot kwansei.ac.jp
2014-04-30 2:28 ` [Bug middle-end/61010] " pinskia at gcc dot gnu.org
2014-04-30 6:00 ` mpolacek at gcc dot gnu.org
2014-04-30 8:21 ` ktkachov at gcc dot gnu.org
2014-04-30 9:06 ` ktkachov at gcc dot gnu.org
2014-04-30 9:29 ` [Bug middle-end/61010] [4.8/4.9/4.10 Regression] Infinite recursion in fold rguenth at gcc dot gnu.org
2014-04-30 10:13 ` rguenth at gcc dot gnu.org
2014-04-30 10:18 ` rguenth at gcc dot gnu.org [this message]
2014-04-30 10:43 ` rguenth at gcc dot gnu.org
2014-04-30 10:43 ` rguenth at gcc dot gnu.org
2014-05-05 9:24 ` [Bug middle-end/61010] [4.8/4.9 " rguenth at gcc dot gnu.org
2014-05-05 9:24 ` rguenth at gcc dot gnu.org
2014-05-22 9:01 ` rguenth at gcc dot gnu.org
2014-05-28 12:47 ` [Bug middle-end/61010] [4.8 " rguenth at gcc dot gnu.org
2014-09-09 13:18 ` rguenth at gcc dot gnu.org
2014-09-09 13:18 ` rguenth at gcc dot gnu.org
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