[Bug c++/14230] New: ICE in cp_expr_size

[Bug c++/14230] New: ICE in cp_expr_size

[jakub at gcc dot gnu dot org]

struct A
{
  A ();
  A (const A&);
  A& operator= (const A&);
};

template<class T>
struct B
{
  struct C
  {
    T y;
    T f () { return y; }
  };

  T f () const
  {
    C c;
    return c.f ();
  }
};

struct D
{
  A a;
};

void foo (B<D> &x)
{
  const A& z = x.f().a;
}

causes ICE on all platforms I've tried, 3.3.3 and 3.4.
It doesn't cause ICE in 2.96-RH, so looks like regression.

-- 
           Summary: ICE in cp_expr_size
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: x86_64-redhat-linux
  GCC host triplet: x86_64-redhat-linux
GCC target triplet: x86_64-redhat-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] ICE in cp_expr_size

[jakub at gcc dot gnu dot org]

------- Additional Comments From jakub at gcc dot gnu dot org  2004-02-21 00:21 -------
Actually, it doesn't ICE in 3.2.3 either, so definitely a regression.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] ICE in cp_expr_size

[jakub at gcc dot gnu dot org]

------- Additional Comments From jakub at gcc dot gnu dot org  2004-02-21 00:41 -------
This is related to http://gcc.gnu.org/ml/gcc-patches/2002-08/msg00174.html
patch.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[giovannibajo at libero dot it]

------- Additional Comments From giovannibajo at libero dot it  2004-02-23 00:59 -------
Confirmed, and reduced thus:

------------------------------------------------
struct A {
  A ();
  A (const A&);
  A& operator= (const A&);
};

struct D {
  A a;
};

const A& z = D().a;
------------------------------------------------
pr14230.cc:11: internal compiler error: in cp_expr_size, at cp/cp-lang.c:345


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |rejects-valid
      Known to fail|                            |3.3.3 3.4.0 3.5.0
      Known to work|                            |3.2.3
   Last reconfirmed|0000-00-00 00:00:00         |2004-02-23 00:59:24
               date|                            |
            Summary|ICE in cp_expr_size         |[3.3/3.4/3.5 Regression] ICE
                   |                            |in cp_expr_size
   Target Milestone|---                         |3.3.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-03-01 20:37 -------
Jason, this looks to be another problem with your exception-handling
optimization stuff.  Would you please take a look at that?

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jason at redhat dot com
                   |dot org                     |
             Status|NEW                         |ASSIGNED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[jason at redhat dot com]

------- Additional Comments From jason at redhat dot com  2004-03-01 21:50 -------
Subject: Re:  [3.3/3.4/3.5 Regression] ICE in cp_expr_size

On 1 Mar 2004 20:37:48 -0000, "mmitchel at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> wrote:

> Jason, this looks to be another problem with your exception-handling
> optimization stuff.  Would you please take a look at that?

For the record, cp_expr_size is not related to the EH optimization code;
aborts in cp_expr_size indicate places where the compiler would otherwise
silently generate a bitwise copy of a class with a constructor.

But yes, I'm looking at this and the other bugs you mentioned.

Jason


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[mark at codesourcery dot com]

------- Additional Comments From mark at codesourcery dot com  2004-03-01 22:04 -------
Subject: Re:  [3.3/3.4/3.5 Regression] ICE in cp_expr_size

Jason Merrill wrote:

>On 1 Mar 2004 20:37:48 -0000, "mmitchel at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> wrote:
>
>  
>
>>Jason, this looks to be another problem with your exception-handling
>>optimization stuff.  Would you please take a look at that?
>>    
>>
>
>For the record, cp_expr_size is not related to the EH optimization code;
>aborts in cp_expr_size indicate places where the compiler would otherwise
>silently generate a bitwise copy of a class with a constructor.
>
>  
>
Yes -- but I thought that the root cause in this case was the 
exception-optimization code generating code that resulted in an extra 
copy.   Sorry if that was a bum steer!

>But yes, I'm looking at this and the other bugs you mentioned.
>
Thanks!



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[jason at redhat dot com]

------- Additional Comments From jason at redhat dot com  2004-03-02 21:05 -------
Subject: Re:  [3.3/3.4/3.5 Regression] ICE in cp_expr_size

Actually, this seems to be a problem with Mark's fix for 11041; using an
INIT_EXPR to initialize a temporary variable from a non-lvalue only elides
the copy if the non-lvalue is a TARGET_EXPR.  In this case, it's a
COMPONENT_REF of a TARGET_EXPR, so the INIT_EXPR becomes a bitwise copy, so
cp_expr_size aborts.

Jason


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-06 23:38 -------
*** Bug 14464 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |robert dot schweikert at
                   |                            |abaqus dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[jason at gcc dot gnu dot org]

------- Additional Comments From jason at gcc dot gnu dot org  2004-03-08 20:55 -------
I've reassigned this to Mark since I don't understand his reasoning for moving
away from cp_finish_decl, which I would expect to generate a copy constructor
call for this case, which would be one correct solution.  Another would be to
preserve the D temporary so that we can refer to the A subobject, though that
might not be desirable in cases where the subobject is only a small part of the
temporary.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|jason at redhat dot com     |mmitchel at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-03-09 10:07 -------
Subject: Bug 14230

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	mmitchel@gcc.gnu.org	2004-03-09 10:07:31

Modified files:
	gcc/cp         : ChangeLog call.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/init: ref11.C 

Log message:
	PR c++/14230
	* call.c (initialize_reference): Handle initializers that are
	class-member access expressions applies to rvalues.
	
	PR c++/14230
	* g++.dg/init/ref11.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3892.2.74&r2=1.3892.2.75
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/call.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.452.2.9&r2=1.452.2.10
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.133&r2=1.3389.2.134
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ref11.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.2.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3/3.4/3.5 Regression] ICE in cp_expr_size

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-03-09 10:08 -------
Subject: Bug 14230

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	mmitchel@gcc.gnu.org	2004-03-09 10:08:40

Modified files:
	gcc/cp         : ChangeLog call.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/init: ref11.C 

Log message:
	PR c++/14230
	* call.c (initialize_reference): Handle initializers that are
	class-member access expressions applies to rvalues.
	
	PR c++/14230
	* g++.dg/init/ref11.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.3989&r2=1.3990
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/call.c.diff?cvsroot=gcc&r1=1.464&r2=1.465
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3585&r2=1.3586
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ref11.C.diff?cvsroot=gcc&r1=1.1&r2=1.2



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3 Regression] ICE in cp_expr_size

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-03-09 10:10 -------
Fixed in GCC 3.4 and GCC 3.5.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|mmitchel at gcc dot gnu dot |unassigned at gcc dot gnu
                   |org                         |dot org
             Status|ASSIGNED                    |NEW
      Known to fail|3.3.3 3.4.0 3.5.0           |3.3.3
            Summary|[3.3/3.4/3.5 Regression] ICE|[3.3 Regression] ICE in
                   |in cp_expr_size             |cp_expr_size


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3 Regression] ICE in cp_expr_size

[gdr at gcc dot gnu dot org]

------- Additional Comments From gdr at gcc dot gnu dot org  2004-03-13 02:01 -------
http://gcc.gnu.org/ml/gcc-patches/2004-03/msg01089.html

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3 Regression] ICE in cp_expr_size

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-03-13 02:01 -------
Subject: Bug 14230

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_3-branch
Changes by:	gdr@gcc.gnu.org	2004-03-13 02:00:59

Modified files:
	gcc/cp         : ChangeLog call.c 
Added files:
	gcc/testsuite/g++.dg/init: ref11.C 

Log message:
	Backport:
	2004-03-09  Mark Mitchell  <mark@codesourcery.com>
	PR c++/14230
	* call.c (initialize_reference): Handle initializers that are
	class-member access expressions applies to rvalues.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.3076.2.260&r2=1.3076.2.261
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/call.c.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=1.341.2.40&r2=1.341.2.41
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ref11.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-branch&r1=NONE&r2=1.2.2.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230

[Bug c++/14230] [3.3 Regression] ICE in cp_expr_size

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-03-27 16:20 -------
Subject: Bug 14230

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_3-rhl-branch
Changes by:	jakub@gcc.gnu.org	2004-03-27 16:20:38

Modified files:
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/init: ref11.C 

Log message:
	2004-03-09  Mark Mitchell  <mark@codesourcery.com>
	
	PR c++/14230
	* g++.dg/init/ref11.C: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_3-rhl-branch&r1=1.2261.2.170.2.51&r2=1.2261.2.170.2.52
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/init/ref11.C.diff?cvsroot=gcc&only_with_tag=gcc-3_3-rhl-branch&r1=NONE&r2=1.2.6.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14230