[Bug c++/60305] New: ICE constexpr array of functions in template

[Bug c++/60305] New: ICE constexpr array of functions in template

[trashyankes at wp dot pl]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60305

            Bug ID: 60305
           Summary: ICE constexpr array of functions in template
           Product: gcc
           Version: 4.8.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trashyankes at wp dot pl

-->8---->8---->8---->8---->8--

template<int Y>
int F() { return Y; }

template<int... I>
void func(int i)
{
//internal compiler error: in type_dependent_expression_p, at cp/pt.c:19969
    constexpr int (*Func[])() = { F<I>... }; 
    return Func[i]();
}

-->8---->8---->8---->8---->8--

without constexpr its compile without error.

[Bug c++/60305] ICE constexpr array of functions in template

[daniel.kruegler at googlemail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60305

Daniel Krügler <daniel.kruegler at googlemail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |daniel.kruegler@googlemail.
                   |                            |com

--- Comment #1 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
Seems to be fixed in 4.9.0 head. Note that your func function template is
broken, because it is declared as returning void, but obviously returns a
non-void result.
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From: "abel at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/60292] [4.9 Regression] ICE: in fill_vec_av_set, at sel-sched.c:3863 with -m64 after r206174 on powerpc-apple-darwin9.8.0
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id`292

Andrey Belevantsev <abel at gcc dot gnu.org> changed:

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

--- Comment #8 from Andrey Belevantsev <abel at gcc dot gnu.org> ---
Fixed on trunk.  No need to backport as the initial assert patch was committed
to trunk only.

[Bug c++/60305] [4.7 Regression] ICE constexpr array of functions in template

[reichelt at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60305

Volker Reichelt <reichelt at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to work|                            |4.6.0, 4.8.3, 4.9.0
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|                            |2014-03-01
                 CC|                            |reichelt at gcc dot gnu.org
     Ever confirmed|0                           |1
            Summary|ICE constexpr array of      |[4.7 Regression] ICE
                   |functions in template       |constexpr array of
                   |                            |functions in template
   Target Milestone|---                         |4.7.4
      Known to fail|                            |4.7.0, 4.8.0, 4.8.1, 4.8.2

--- Comment #2 from Volker Reichelt <reichelt at gcc dot gnu.org> ---
Confirmed. Happens since GCC 4.7.0, but is already fixed on the trunk (for GCC
4.9.0) and on the 4.8 branch (for GCC 4.8.3). Valid testcase:

===========================================
template<int I> int foo() { return I; }

template<int... I> void bar()
{
  constexpr int (*X[])() = { foo<I>... };
}

template void bar<1,3,5>();
===========================================

[Bug c++/60305] [4.7 Regression] ICE constexpr array of functions in template

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60305

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Let's add the testcase to mainline and close this.

[Bug c++/60305] [4.7 Regression] ICE constexpr array of functions in template

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60305

--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> ---
Author: paolo
Date: Tue Mar 18 17:10:23 2014
New Revision: 208658

URL: http://gcc.gnu.org/viewcvs?rev=208658&root=gcc&view=rev
Log:
2014-03-18  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/60305
    * g++.dg/cpp0x/constexpr-ice14.C: New.

2014-03-18  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/54250
    * g++.dg/cpp0x/lambda/lambda-ice12.C: New.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-ice14.C
    trunk/gcc/testsuite/g++.dg/cpp0x/lambda/lambda-ice12.C
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug c++/60305] [4.7 Regression] ICE constexpr array of functions in template

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60305

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

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

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> ---
Fixed.