[Bug c/18493] New: gcc doesn't like switch blocks without case/default labels

[Bug c/18493] New: gcc doesn't like switch blocks without case/default labels

[fn_x at hotmail dot com]

Hi,

int main() {
goto bug;
switch(0) {
bug: return 0;
}
}

This program doesn't compile with gcc 3.4.3. It gives this error message:
/tmp/ccetXBGt.o(.text+0x1d): In function `main':
: undefined reference to `.L2'

However, this:

int main() {
goto bug;
switch(0) {
bug: return 0;
default: ;
}
}

does compile without a problem.

gcc 2.95.3 and 3.3.4 compile both examples.

I searched to see if anyone else reported this, and only found bug #17078. I
don't know if it's related or just similar. Sorry if I overlooked another bug
report.

-- 
           Summary: gcc doesn't like switch blocks without case/default
                    labels
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: fn_x at hotmail dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493

[Bug middle-end/18493] [3.4 Regression] gcc doesn't like switch blocks without case/default labels

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-15 03:29 -------
Confirmed only effects the 3.4 branch.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c                           |middle-end
     Ever Confirmed|                            |1
           Keywords|                            |wrong-code
      Known to fail|                            |3.4.0
      Known to work|                            |3.3.3 4.0.0
   Last reconfirmed|0000-00-00 00:00:00         |2004-11-15 03:29:58
               date|                            |
            Summary|gcc doesn't like switch     |[3.4 Regression] gcc doesn't
                   |blocks without case/default |like switch blocks without
                   |labels                      |case/default labels
   Target Milestone|---                         |3.4.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493

[Bug middle-end/18493] [3.4 Regression] gcc doesn't like switch blocks without case/default labels

[roger at eyesopen dot com]

------- Additional Comments From roger at eyesopen dot com  2004-11-27 18:40 -------
Patch here http://gcc.gnu.org/ml/gcc-patches/2004-11/msg02309.html

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493

[Bug middle-end/18493] [3.4 Regression] gcc doesn't like switch blocks without case/default labels

[ebotcazou at gcc dot gnu dot org]

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2004-12-14 09:01 -------
Assigning to Roger since he posted a patch.


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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493

[Bug middle-end/18493] [3.4 Regression] gcc doesn't like switch blocks without case/default labels

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-12-16 14:43 -------
Subject: Bug 18493

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-3_4-branch
Changes by:	sayle@gcc.gnu.org	2004-12-16 14:42:50

Modified files:
	gcc            : ChangeLog c-typeck.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg: switch-4.c 

Log message:
	PR middle-end/18493
	* c-typeck.c (c_finish_case): Rechain statements if we didn't
	encounter any case labels or a default.
	
	* gcc.dg/switch-4.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=2.2326.2.744&r2=2.2326.2.745
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-typeck.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.272.2.10&r2=1.272.2.11
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=1.3389.2.328&r2=1.3389.2.329
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/switch-4.c.diff?cvsroot=gcc&only_with_tag=gcc-3_4-branch&r1=NONE&r2=1.1.22.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493

[Bug middle-end/18493] [3.4 Regression] gcc doesn't like switch blocks without case/default labels

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-12-16 16:25 -------
Fixed.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493

[Bug middle-end/18493] [3.4 Regression] gcc doesn't like switch blocks without case/default labels

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-12-16 17:52 -------
Subject: Bug 18493

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	sayle@gcc.gnu.org	2004-12-16 17:52:02

Modified files:
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg: switch-8.c 

Log message:
	PR middle-end/18493
	* gcc.dg/switch-8.c: New test case.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4769&r2=1.4770
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/switch-8.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18493