[Bug c++/21440] New: [4.0 Regression] ICE with statement-as-expression

[Bug c++/21440] New: [4.0 Regression] ICE with statement-as-expression

[dank at kegel dot com]

The following test program works with gcc-2.95.3 and gcc-3.4.1,
but aborts with this error on gcc-4.0.0:

z.ii: In function 'void bar()':
z.ii:11: internal compiler error: in create_tmp_var, at gimplify.c:368


struct Foo {
  ~Foo() {}
  int i;
  operator bool() { return !i; }
};

void bar() {
    Foo foo = ({
        Foo bletch;
        bletch.i = 0;
        bletch;
    });
}

This popped up in an early run of gcc-4.0.0 on real code.

-- 
           Summary: [4.0 Regression] ICE with statement-as-expression
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dank at kegel dot com
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0 Regression] ICE with statement-as-expression

[dank at kegel dot com]

------- Additional Comments From dank at kegel dot com  2005-05-07 08:31 -------
Forgot to mention: I have applied the fixes for
PR20973 and PR21173 as given in bugzilla.



-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.0 Regression] ICE with   |[4.0 Regression] ICE with
                   |statement-as-expression     |statement-as-expression


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-07 15:02 -------
Confirmed. Related to PR 20103.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
  BugsThisDependsOn|                            |20103
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2005-05-07 15:02:24
               date|                            |
            Summary|[4.0 Regression] ICE with   |[4.0/4.1 Regression] ICE
                   |statement-as-expression     |with statement-as-expression
   Target Milestone|---                         |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-09 20:43 -------
This has been failing since the tree-ssa branch was merged in and on the tree-ssa since at least
2003-05-30.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[nathan at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |nathan at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2005-05-07 15:02:24         |2005-06-02 10:01:30
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[nathan at gcc dot gnu dot org]

------- Additional Comments From nathan at gcc dot gnu dot org  2005-06-02 11:41 -------
ug, this is horrible.  we're incorrectly smashing up the inside of a STMT_EXPR
to pull out a TARGET_EXPR we know is there.  Unfortunately that moves a decl
outside of its cleanup.  We really should be going the other way and pushing the
user of the STMT_EXPR into it.  I suspect we'll need to move further along the
path of making STMT_EXPRs look like real function calls, complete with an
explicitly generated RESULT_DECL.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|nathan at gcc dot gnu dot   |unassigned at gcc dot gnu
                   |org                         |dot org
             Status|ASSIGNED                    |NEW


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2005-07-06 17:02 -------
Postponed until 4.0.2.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.0.1                       |4.0.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2005-07-25 11:57 -------
Shorter testcase:

===========================
struct A
{
    ~A();
};

void foo()
{
    A a = ({ A b; b; });
}
===========================


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
           Keywords|                            |monitored


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[mmitchel at gcc dot gnu dot org]

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-09-05 15:59 -------
Subject: Bug 21440

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	mmitchel@gcc.gnu.org	2005-09-05 15:59:32

Modified files:
	gcc/cp         : semantics.c ChangeLog 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/ext: stmtexpr5.C stmtexpr6.C 

Log message:
	PR c++/21440
	* semantics.c (finish_stmt_expr_expr): Add an explicit
	initialization to the last statement in the statement-expression.
	* (finish_stmt_expr): Adjust accordingly.
	
	PR c++/21440
	* g++.dg/ext/stmtexpr5.C: New test.
	* g++.dg/ext/stmtexpr6.C: Likewise.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&r1=1.484&r2=1.485
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4869&r2=1.4870
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.6009&r2=1.6010
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/ext/stmtexpr5.C.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/ext/stmtexpr6.C.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-09-05 16:00 -------
Subject: Bug 21440

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	mmitchel@gcc.gnu.org	2005-09-05 16:00:46

Modified files:
	gcc/cp         : semantics.c ChangeLog 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/ext: stmtexpr5.C stmtexpr6.C 

Log message:
	PR c++/21440
	* semantics.c (finish_stmt_expr_expr): Add an explicit
	initialization to the last statement in the statement-expression.
	* (finish_stmt_expr): Adjust accordingly.
	
	PR c++/21440
	* g++.dg/ext/stmtexpr5.C: New test.
	* g++.dg/ext/stmtexpr6.C: Likewise.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/semantics.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.463.2.7&r2=1.463.2.8
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.4648.2.89&r2=1.4648.2.90
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.5084.2.376&r2=1.5084.2.377
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/ext/stmtexpr5.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/ext/stmtexpr6.C.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=NONE&r2=1.1.2.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2005-09-05 16:08 -------
Fixed in 4.0.2.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440

[Bug c++/21440] [4.0/4.1 Regression] ICE with statement-as-expression

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2005-09-06 15:15 -------
*** Bug 23636 has been marked as a duplicate of this bug. ***

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gj at pointblue dot com dot
                   |                            |pl


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21440