[Bug c/21105] New: Compiling of large array fails

[Bug c/21105] New: Compiling of large array fails

[e9925248 at stud4 dot tuwien dot ac dot at]

Compiling
void
foo ()
{
  float c[204800000][4];
}

fails with
t3.c: In function 'foo':
t3.c:16: internal compiler error: in tree_low_cst, at tree.c:3846

All current CVS versions (4.X fail).
At least some 3.x versions are not affected
GCC 2.96 shows an other error.

Affected Versions, which I tested:
4.1.0 20050416
4.1.0 20050302
2.96 20000731 (Red Hat Linux 7.2 2.96-112.7.2)

Non Affected Version:
3.3.3 20040412 (Red Hat Linux 3.3.3-7)

-- 
           Summary: Compiling of large array fails
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: e9925248 at stud4 dot tuwien dot ac dot at
                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=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-04-19 13:08 -------
Confirmed, this is most likely caused by the tree-ssa merge.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
          Component|c                           |middle-end
     Ever Confirmed|                            |1
           Keywords|                            |ice-on-invalid-code
      Known to fail|                            |4.0.0 4.1.0 3.0.4
      Known to work|                            |3.4.0 3.3.3
   Last reconfirmed|0000-00-00 00:00:00         |2005-04-19 13:08:31
               date|                            |
            Summary|Compiling of large array    |[4.0/4.1 Regression]
                   |fails                       |Compiling of large array
                   |                            |fails
   Target Milestone|---                         |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-05-02 21:55 -------
Patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-05/msg00121.html>.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2005-
                   |                            |05/msg00121.html
           Keywords|                            |patch
   Last reconfirmed|2005-04-19 13:08:31         |2005-05-02 21:55:12
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[mmitchel at gcc dot gnu dot org]

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-25 15:50 -------
Hmm, Jim posted a patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-05/msg00377.html>  but 
never applied it.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                URL|http://gcc.gnu.org/ml/gcc-  |http://gcc.gnu.org/ml/gcc-
                   |patches/2005-               |patches/2005-
                   |05/msg00121.html            |05/msg00377.html


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[wilson at specifix dot com]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1729 bytes --]


------- Additional Comments From wilson at specifix dot com  2005-08-16 00:47 -------
Subject: Re:  [4.0/4.1 Regression] Compiling of large
 array fails

pinskia at gcc dot gnu dot org wrote:
> ------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-25 15:50 -------
> Hmm, Jim posted a patch here: <http://gcc.gnu.org/ml/gcc-patches/2005-05/msg00377.html>  but 
> never applied it.

I never finished my patch.  I was hoping someone else would help finish
it.  Since it is my patch, I'll follow up on this.

The first thing I did here is grep the entire tree for
  TREE_OVERFLOW (TYPE_SIZE (...))
since all such occurances are broken.  I found 3.  One in the C front
end (this bug), one in the C++ front end, and one in the Ada front end.

I can't create a testcase for the Ada bug, nor can I at the moment build
the Ada front end, so there is not much I can do there other than maybe
create a new bug report for it and insert the obvious patch.

The C++ code is identical to the C code, so the same testcase and patch
work here.  Unfortunately, there is a problem.  I get
tmp.cc:13: error: size of array ‘array’ is too large
tmp.cc:17: error: ‘array’ was not declared in this scope
The first error is correct, the second one isn't.  Or at least I assume
it isn't.  I'm not qualified to comment on that, nor am I qualified to
fix it.  So, um, I guess I am creating yet another new bug report for that.

For the C front end, I have a patch that I believe is correct, and I
have a small testcase that I think is reasonably portable.  I need to
drop my testcase into the testsuite with dg annotations, and test it all
with a bootstrap and make check.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-16 18:24 -------
Subject: Bug 21105

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	wilson@gcc.gnu.org	2005-08-16 18:23:59

Modified files:
	gcc            : ChangeLog c-decl.c 
	gcc/testsuite  : ChangeLog 
Added files:
	gcc/testsuite/gcc.dg: large-size-array.c 

Log message:
	Emit an error for too large arrays instead of an ICE.
	PR tree-optimization/21105
	* c-decl.c (grokdeclarator): Use TYPE_SIZE_UNIT not TYPE_SIZE in
	TREE_OVERFLOW check.
	* gcc.dg/large-size-array.c: New.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9745&r2=2.9746
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-decl.c.diff?cvsroot=gcc&r1=1.680&r2=1.681
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.5928&r2=1.5929
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/large-size-array.c.diff?cvsroot=gcc&r1=NONE&r2=1.1



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-16 20:34 -------
Subject: Bug 21105

CVSROOT:	/cvs/gcc
Module name:	gcc
Branch: 	gcc-4_0-branch
Changes by:	wilson@gcc.gnu.org	2005-08-16 20:34:21

Modified files:
	gcc            : ChangeLog c-decl.c 

Log message:
	Fix ICE that occurs with too large array.
	PR tree-optimization/21105
	* c-decl.c (grokdeclarator): Use TYPE_SIZE_UNIT not TYPE_SIZE in
	TREE_OVERFLOW check.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.371&r2=2.7592.2.372
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/c-decl.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.630.6.15&r2=1.630.6.16



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[wilson at gcc dot gnu dot org]

------- Additional Comments From wilson at gcc dot gnu dot org  2005-08-16 20:36 -------
The C front end bug is fixed on mainline and the gcc-4.0.x branch.  The C++ and
Ada front end bugs have their own PRs now.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
      Known to fail|4.0.0 4.1.0 3.0.4           |4.0.0 3.0.4
      Known to work|3.4.0 3.3.3                 |3.4.0 3.3.3 4.0.2 4.1.0
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105

[Bug middle-end/21105] [4.0/4.1 Regression] Compiling of large array fails

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-08-22 23:52 -------
Subject: Bug 21105

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	wilson@gcc.gnu.org	2005-08-22 23:52:24

Modified files:
	gcc/cp         : ChangeLog decl.c 

Log message:
	Partial fix for too large arrays.
	PR tree-optimization/21105
	* decl.c (grokdeclarator): Use TYPE_SIZE_UNIT not TYPE_SIZE for
	array size check.

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/ChangeLog.diff?cvsroot=gcc&r1=1.4854&r2=1.4855
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/cp/decl.c.diff?cvsroot=gcc&r1=1.1419&r2=1.1420



-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21105