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[Bug c/39855] [4.3/4.4/4.5 Regression] Shift optimization discards operands' side effects
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Apr 2009 22:03:18 -0000
- Subject: [Bug c/39855] [4.3/4.4/4.5 Regression] Shift optimization discards operands' side effects
- References: <bug-39855-17390@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from jakub at gcc dot gnu dot org 2009-04-22 22:03 -------
Subject: Bug 39855
Author: jakub
Date: Wed Apr 22 22:02:54 2009
New Revision: 146622
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=146622
Log:
PR c/39855
* fold-const.c (fold_binary) <case LSHIFT_EXPR>: When optimizing
into 0, use omit_one_operand.
* gcc.dg/torture/pr39855.c: New test.
Added:
branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/torture/pr39855.c
- copied unchanged from r146617,
trunk/gcc/testsuite/gcc.dg/torture/pr39855.c
Modified:
branches/gcc-4_4-branch/gcc/ChangeLog
branches/gcc-4_4-branch/gcc/fold-const.c
branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39855