[Bug c/18164] New: ICE on trivial invalid asm

[Bug c/18164] New: ICE on trivial invalid asm

[jsm28 at gcc dot gnu dot org]

void
f (void)
{
  int x;
  asm ("" : "" (x));
}

yields an ICE (discovered while attempting to disallow wide strings in asms)

t.c: In function 'f':
t.c:5: error: output operand constraint lacks '='
t.c:5: error: output operand constraint lacks '='
t.c:5: error: invalid lvalue in asm output 0
t.c:5: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

This appears to be fairly recent:

: Search converges between 2004-10-09-014001-trunk (#585) and
2004-10-09-161001-trunk (#586).

-- 
           Summary: ICE on trivial invalid asm
           Product: gcc
           Version: 4.0.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jsm28 at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug c/18164] [4.0 Regression] ICE on trivial invalid asm

[pinskia at gcc dot gnu dot org]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
           Keywords|                            |error-recovery, ice-on-
                   |                            |invalid-code
            Summary|ICE on trivial invalid asm  |[4.0 Regression] ICE on
                   |                            |trivial invalid asm
   Target Milestone|---                         |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-10-26 20:02 -------
Confirmed, we are ICE in the gimplifer:
#0  0xffff8cc0 in __memcpy ()
#1  0x006176a4 in build_string (len=-1, str=0x4248e0d5 "\177?????????") at /Users/pinskia/src/ipa-
out/gcc/gcc/tree.c:755
#2  0x0011b254 in gimplify_asm_expr (expr_p=0x42477fc8, pre_p=0xbfffe4a4, post_p=0xbfffe4a8) at 
/Users/pinskia/src/ipa-out/gcc/gcc/gimplify.c:3193

constraint_len is 0 at this point.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c                           |middle-end
     Ever Confirmed|                            |1
   Last reconfirmed|0000-00-00 00:00:00         |2004-10-26 20:02:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[bje at gcc dot gnu dot org]

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-25 19:04 -------
Sorry Ben to steal another bug from you but I fixed it.
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2004-11/msg02173.html>.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|bje at gcc dot gnu dot org  |pinskia at gcc dot gnu dot
                   |                            |org
           Keywords|                            |patch


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-29 02:20 -------
Fixed by:
2004-11-18  Andrew Pinski  <pinskia@physics.uc.edu>

        PR middle-end/18164
        * gimplify.c (gimplify_asm_expr): If the length of an output operand
        is zero, do not process it, just let it go through.

2004-11-28  Andrew Pinski  <pinskia@physics.uc.edu>

        * gcc.dg/pr18164.c: New test.

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-11-29 02:21 -------
Subject: Bug 18164

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	pinskia@gcc.gnu.org	2004-11-29 02:21:28

Modified files:
	gcc            : ChangeLog gimplify.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg: pr18164.c 

Log message:
	2004-11-18  Andrew Pinski  <pinskia@physics.uc.edu>
	
	PR middle-end/18164
	* gimplify.c (gimplify_asm_expr): If the length of an output operand
	is zero, do not process it, just let it go through.
	
	2004-11-28  Andrew Pinski  <pinskia@physics.uc.edu>
	
	* gcc.dg/pr18164.c: New test.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.6615&r2=2.6616
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/gimplify.c.diff?cvsroot=gcc&r1=2.87&r2=2.88
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4672&r2=1.4673
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr18164.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[hp at gcc dot gnu dot org]

------- Additional Comments From hp at gcc dot gnu dot org  2004-11-29 12:58 -------
The test-case is flawed; at least not robust enough for all bison.
I get:
Excess errors:
/gcc/testsuite/gcc.dg/pr18164.c:6: error: syntax error before ':' token

FC2, bison-1.875c-1.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[hp at gcc dot gnu dot org]

------- Additional Comments From hp at gcc dot gnu dot org  2004-11-29 13:19 -------
...no, not a bison issue.  It's the testsuite integration that's wrong.
(How did you test it?)  You need to adjust for the automatically added "-ansi".
A dg-options "" should do it.  Oh, and I'll have to fix the dg-error typo.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164

[Bug middle-end/18164] [4.0 Regression] ICE on trivial invalid asm

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2004-11-29 13:28 -------
Subject: Bug 18164

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	hp@gcc.gnu.org	2004-11-29 13:27:11

Modified files:
	gcc/testsuite  : ChangeLog 
	gcc/testsuite/gcc.dg: pr18164.c 

Log message:
	PR middle-end/18164
	* gcc.dg/pr18164.c: Add dg-options "".  Correct typo in dg-error.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4674&r2=1.4675
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr18164.c.diff?cvsroot=gcc&r1=1.1&r2=1.2



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18164