[Bug c++/14203] New: [3.3 regression] ICE on valid code

[Bug c++/14203] New: [3.3 regression] ICE on valid code

[debian-gcc at lists dot debian dot org]

[forwarded from http://bugs.debian.org/233548]

with 3.4 CVS 20040215:

g++ -Wall bug-233548.cc
bug-233548.cc: In function `int main()':
bug-233548.cc:19: warning: unused variable 'dummy'
bug-233548.cc:26: internal compiler error: in make_decl_rtl, at varasm.c:752
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

namespace Data 
{ 
  class Dummy; 
} 
 
namespace 
{ 
  const bool g_bAlways = false; 
 
  Data::Dummy* getDummy(); 
}; 
 
int main() 
{ 
  int i; 
 
  if (g_bAlways) 
  { 
     if (Data::Dummy* dummy = getDummy()) 
     { 
        int bla(5); 
 
        i = bla; 
     } 
  } 
}

-- 
           Summary: [3.3 regression] ICE on valid code
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug c++/14203] [3.4/3.5 regression] ICE on warning about unused variable

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-02-19 00:26 -------
Confirmed. Here's something a little smaller: 
----------------------- 
int* foo();  
const bool b = false; 
 
int main() {  
  int i;  
  
  if (b)  
    if (int* p = foo())  
      {  
        int bla; 
        i = 1;  
      } 
} 
------------------------ 
 
This is a regression on 3.4 and mainline against 3.3.3: 
deal.II/base> /home/bangerth/bin/gcc-3.5-pre/bin/c++ -c x.cc -Wall 
x.cc: In function `int main()': 
x.cc:10: warning: unused variable 'bla' 
x.cc:8: warning: unused variable 'p' 
x.cc:13: internal compiler error: in make_decl_rtl, at varasm.c:707 
Please submit a full bug report, 
with preprocessed source if appropriate. 
See <URL:http://gcc.gnu.org/bugs.html> for instructions. 
 
W. 

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-valid-code
      Known to fail|                            |3.4.0 3.5.0
      Known to work|                            |3.3.3
   Last reconfirmed|0000-00-00 00:00:00         |2004-02-19 00:26:07
               date|                            |
            Summary|[3.3 regression] ICE on     |[3.4/3.5 regression] ICE on
                   |valid code                  |warning about unused
                   |                            |variable
   Target Milestone|---                         |3.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4/3.5 regression] ICE on warning about uninitialized variable

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-02-19 00:55 -------
The problem is that the variable was not emitted into RTL so the variable does have not a DECL_RTL and 
calling make_decl_rtl on the decl will cause an ICE as the variable is an automatic variable.  Note this is 
fixed on the tree-ssa but having this warning being on the tree level and not the RTL level.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal
          Component|c++                         |middle-end
      Known to work|3.3.3                       |3.3.3 tree-ssa
            Summary|[3.4/3.5 regression] ICE on |[3.4/3.5 regression] ICE on
                   |warning about unused        |warning about uninitialized
                   |variable                    |variable


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4/3.5 regression] ICE on warning about uninitialized variable

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2004-02-19 02:32 -------
An even shorter version:

=============================================
void foo()
{
  if (false)
    if (int i=0)
      int j=0;
}
=============================================


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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4/3.5 regression] ICE on warning about uninitialized variable

[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=14203

[Bug middle-end/14203] [3.4/3.5 regression] ICE on warning about uninitialized variable

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-02-29 14:07 -------
Subject: Bug 14203

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2004-02-29 14:07:44

Modified files:
	gcc            : ChangeLog function.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/warn: Wunused-6.C 

Log message:
	2004-02-29  Waldek Hebisch  <hebisch@math.uni.wroc.pl>
	
	PR middle-end/14203
	* function.c (uninitialized_vars_warning): Use DECL_RTL_SET_P
	instead of testing whether DECL_RTL is not NULL.
	
	2004-02-29  Roger Sayle  <roger@eyesopen.com>
	
	PR middle-end/14203
	* g++.dg/warn/Wunused-6.C: New test case.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.2967&r2=2.2968
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/function.c.diff?cvsroot=gcc&r1=1.498&r2=1.499
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.3553&r2=1.3554
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/warn/Wunused-6.C.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4 regression] ICE on warning about uninitialized variable

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-02-29 16:14 -------
Only a 3.4 Regression now.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[3.4/3.5 regression] ICE on |[3.4 regression] ICE on
                   |warning about uninitialized |warning about uninitialized
                   |variable                    |variable


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4 regression] ICE on warning about uninitialized variable

[mmitchel at gcc dot gnu dot org]

------- Additional Comments From mmitchel at gcc dot gnu dot org  2004-03-01 06:48 -------
May we please have this patch committed to the 3.4 branch as well?

Thanks!

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4 regression] ICE on warning about uninitialized variable

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-03-06 02:32 -------
Subject: Bug 14203

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	sayle@gcc.gnu.org	2004-03-06 02:32:07

Modified files:
	gcc            : ChangeLog function.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/g++.dg/warn: Wunused-6.C 

Log message:
	2004-03-05  Waldek Hebisch  <hebisch@math.uni.wroc.pl>
	
	PR middle-end/14203
	* function.c (uninitialized_vars_warning): Use DECL_RTL_SET_P
	instead of testing whether DECL_RTL is not NULL.
	
	2004-03-05  Roger Sayle  <roger@eyesopen.com>
	
	* g++.dg/warn/Wunused-6.C: New test case.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=2.2326.2.293&r2=2.2326.2.294
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/function.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.483.4.5&r2=1.483.4.6
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.122&r2=1.3389.2.123
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/g++.dg/warn/Wunused-6.C.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.4.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203

[Bug middle-end/14203] [3.4 regression] ICE on warning about uninitialized variable

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-03-06 03:28 -------
Fixed.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14203