[Bug c++/53503] New: [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[Bug c++/53503] New: [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[liling at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

             Bug #: 53503
           Summary: [4.7 Regression] [C++0x] unexpected AST of kind
                    ltgt_expr
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: liling@gmail.com


Created attachment 27510
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27510
Preporcessed source

G++ 4.7 can't compile a one-line file with both -std=c++0x and
-fno-trapping-math:

$ cat a.cpp
#include <cmath>
$ g++ -fno-trapping-math -std=c++0x -c a.cpp
In file included from a.cpp:1:0:
/usr/lib/gcc/x86_64-redhat-linux/4.7.0/../../../../include/c++/4.7.0/cmath: In
function ‘constexpr bool std::islessgreater(float, float)’:
/usr/lib/gcc/x86_64-redhat-linux/4.7.0/../../../../include/c++/4.7.0/cmath:764:47:
sorry, unimplemented: unexpected AST of kind ltgt_expr
/usr/lib/gcc/x86_64-redhat-linux/4.7.0/../../../../include/c++/4.7.0/cmath:764:
confused by earlier errors, bailing out
Preprocessed source stored into /tmp/ccGqxqjD.out file, please attach this to
your bugreport.

I was using GCC 4.7.0 20120507 on Fedora 17.

[Bug c++/53503] [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2012-05-28
         AssignedTo|unassigned at gcc dot       |paolo.carlini at oracle dot
                   |gnu.org                     |com
   Target Milestone|---                         |4.7.1
     Ever Confirmed|0                           |1

--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-28 10:02:44 UTC ---
Seems very easy to fix.

[Bug c++/53503] [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-05-28 12:09:10 UTC ---
Author: paolo
Date: Mon May 28 12:09:01 2012
New Revision: 187928

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187928
Log:
gcc/cp
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/53503
    * semantics.c (potential_constant_expression_1): Handle LTGT_EXPR.

libstdc++-v3
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/53503
    * testsuite/26_numerics/headers/cmath/53503.cc: New.

Added:
    trunk/libstdc++-v3/testsuite/26_numerics/headers/cmath/53503.cc
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/semantics.c
    trunk/libstdc++-v3/ChangeLog

[Bug c++/53503] [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-05-28 12:11:15 UTC ---
Author: paolo
Date: Mon May 28 12:11:04 2012
New Revision: 187929

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187929
Log:
gcc/cp
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/53503
    * semantics.c (potential_constant_expression_1): Handle LTGT_EXPR.

libstdc++-v3
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/53503
    * testsuite/26_numerics/headers/cmath/53503.cc: New.

Added:
   
branches/gcc-4_7-branch/libstdc++-v3/testsuite/26_numerics/headers/cmath/53503.cc
Modified:
    branches/gcc-4_7-branch/gcc/cp/ChangeLog
    branches/gcc-4_7-branch/gcc/cp/semantics.c
    branches/gcc-4_7-branch/libstdc++-v3/ChangeLog

[Bug c++/53503] [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-05-28 12:11:15 UTC ---
Author: paolo
Date: Mon May 28 12:11:04 2012
New Revision: 187929

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187929
Log:
gcc/cp
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/53503
    * semantics.c (potential_constant_expression_1): Handle LTGT_EXPR.

libstdc++-v3
2012-05-28  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/53503
    * testsuite/26_numerics/headers/cmath/53503.cc: New.

Added:
   
branches/gcc-4_7-branch/libstdc++-v3/testsuite/26_numerics/headers/cmath/53503.cc
Modified:
    branches/gcc-4_7-branch/gcc/cp/ChangeLog
    branches/gcc-4_7-branch/gcc/cp/semantics.c
    branches/gcc-4_7-branch/libstdc++-v3/ChangeLog

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-28 12:11:48 UTC ---
Fixed mainline and 4.7.1.

[Bug c++/53503] [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED

--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-28 12:11:48 UTC ---
Fixed mainline and 4.7.1.

[Bug c++/53503] [4.7 Regression] [C++0x] unexpected AST of kind ltgt_expr

[liling at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53503

--- Comment #5 from Ling Li <liling at gmail dot com> 2012-05-28 12:37:44 UTC ---
Thanks much for the super quick fix.