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* [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators
@ 2004-10-18 13:47 veksler at il dot ibm dot com
2004-10-18 14:06 ` [Bug c++/18047] [4.0 Regression] " pinskia at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: veksler at il dot ibm dot com @ 2004-10-18 13:47 UTC (permalink / raw)
To: gcc-bugs
gcc-4.0 gives operator== higher precedence than operator<, which is against
5.10 paragraph 1:
"Note: a<b == c<d is true whenever a<b and c<d have the same truth value"
$ cat t.cpp
int main()
{
if ( 2 < 0 == false)
return 0; // should return here
return 1;
}
$ /home/veksler/gcc-4.0-20041017/bin/g++ t.cpp
$ ./a.out ; echo status=$?
status=1
--
Summary: Wrong precedence between equality (==, !=) and <
operators
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: veksler at il dot ibm dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC host triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
@ 2004-10-18 14:06 ` pinskia at gcc dot gnu dot org
2004-10-18 15:02 ` zack at codesourcery dot com
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-18 14:06 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-18 14:06 -------
Confirmed, the regression showed up on 2004-09-23 (between 01:40:01 and 16:10:02 EST/EDT).
Since this effects only the C++ front-end, the patch which looks the most likely is:
2004-09-23 Zack Weinberg <zack@codesourcery.com>
* decl.c (grokfndecl): If ::main is found not to return int,
correct it after issuing a diagnostic.
(grokdeclarator): If the incoming type was error_mark_node, do
not complain about declaring something with no type.
(start_function): Change check for ::main not returning int to
an assertion, as grokfndecl now catches this when the user did it.
* init.c (perform_member_init, sort_mem_initializers)
(emit_mem_initializers): Make most diagnostics be issued on
the line of current_function_decl, not whatever the current
input line is.
.....
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |zack at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |wrong-code
Known to fail| |4.0.0
Known to work| |3.4.0
Last reconfirmed|0000-00-00 00:00:00 |2004-10-18 14:06:18
date| |
Summary|Wrong precedence between |[4.0 Regression] Wrong
|equality (==, !=) and < |precedence between equality
|operators |(==, !=) and < operators
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
2004-10-18 14:06 ` [Bug c++/18047] [4.0 Regression] " pinskia at gcc dot gnu dot org
@ 2004-10-18 15:02 ` zack at codesourcery dot com
2004-10-18 15:50 ` bangerth at dealii dot org
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: zack at codesourcery dot com @ 2004-10-18 15:02 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From zack at codesourcery dot com 2004-10-18 15:02 -------
Subject: Re: [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
I doubt that. I'd be inclined to point fingers at the
operator-precedence parser patch, myself.
zw
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
2004-10-18 14:06 ` [Bug c++/18047] [4.0 Regression] " pinskia at gcc dot gnu dot org
2004-10-18 15:02 ` zack at codesourcery dot com
@ 2004-10-18 15:50 ` bangerth at dealii dot org
2004-10-18 18:36 ` pinskia at gcc dot gnu dot org
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bangerth at dealii dot org @ 2004-10-18 15:50 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bangerth at dealii dot org 2004-10-18 15:50 -------
Well, in any case it's definitely a critical regression!
W.
--
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |critical
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
` (2 preceding siblings ...)
2004-10-18 15:50 ` bangerth at dealii dot org
@ 2004-10-18 18:36 ` pinskia at gcc dot gnu dot org
2004-10-19 7:35 ` bonzini at gcc dot gnu dot org
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-18 18:36 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-18 18:36 -------
Paolo since now I have been convinced that your patch caused this regression, could you look into it?
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |bonzini at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
` (3 preceding siblings ...)
2004-10-18 18:36 ` pinskia at gcc dot gnu dot org
@ 2004-10-19 7:35 ` bonzini at gcc dot gnu dot org
2004-10-19 7:42 ` bonzini at gcc dot gnu dot org
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2004-10-19 7:35 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Last reconfirmed|2004-10-18 14:06:18 |2004-10-19 07:35:57
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
` (4 preceding siblings ...)
2004-10-19 7:35 ` bonzini at gcc dot gnu dot org
@ 2004-10-19 7:42 ` bonzini at gcc dot gnu dot org
2004-10-19 12:41 ` cvs-commit at gcc dot gnu dot org
2004-10-19 12:43 ` bonzini at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2004-10-19 7:42 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bonzini at gcc dot gnu dot org 2004-10-19 07:42 -------
The fix is obvious, I misordered the two precedence in enum cp_parser_prec.
I'll commit it and add a testcase.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
` (5 preceding siblings ...)
2004-10-19 7:42 ` bonzini at gcc dot gnu dot org
@ 2004-10-19 12:41 ` cvs-commit at gcc dot gnu dot org
2004-10-19 12:43 ` bonzini at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2004-10-19 12:41 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2004-10-19 12:40 -------
Subject: Bug 18047
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: bonzini@gcc.gnu.org 2004-10-19 12:40:32
Modified files:
gcc/cp : ChangeLog parser.c
gcc/testsuite : ChangeLog
Added files:
gcc/testsuite/g++.dg/parse: expr3.C
Log message:
2004-10-19 Paolo Bonzini <bonzini@gnu.org>
PR c++/18047
* parser.c (enum cp_parser_prec): Give relational expressions
a higher precedence than equality expressions.
2004-10-19 Paolo Bonzini <bonzini@gnu.org>
PR c++/18047
* g++.dg/parse/expr3.C: New test.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4442&r2=1.4443
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/parser.c.diff?cvsroot=gcc&r1=1.265&r2=1.266
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4473&r2=1.4474
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/parse/expr3.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug c++/18047] [4.0 Regression] Wrong precedence between equality (==, !=) and < operators
2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
` (6 preceding siblings ...)
2004-10-19 12:41 ` cvs-commit at gcc dot gnu dot org
@ 2004-10-19 12:43 ` bonzini at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2004-10-19 12:43 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bonzini at gcc dot gnu dot org 2004-10-19 12:43 -------
Fixed by the above patch.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18047
^ permalink raw reply [flat|nested] 9+ messages in thread
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2004-10-18 13:47 [Bug c++/18047] New: Wrong precedence between equality (==, !=) and < operators veksler at il dot ibm dot com
2004-10-18 14:06 ` [Bug c++/18047] [4.0 Regression] " pinskia at gcc dot gnu dot org
2004-10-18 15:02 ` zack at codesourcery dot com
2004-10-18 15:50 ` bangerth at dealii dot org
2004-10-18 18:36 ` pinskia at gcc dot gnu dot org
2004-10-19 7:35 ` bonzini at gcc dot gnu dot org
2004-10-19 7:42 ` bonzini at gcc dot gnu dot org
2004-10-19 12:41 ` cvs-commit at gcc dot gnu dot org
2004-10-19 12:43 ` bonzini at gcc dot gnu dot org
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