[Bug c/39613] New: gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[Bug c/39613] New: gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[kdebugs at hotmail dot com]

Kernel won't compile at mce64.c in directory
/usr/src/zen-sources/arch/x86/kernel/cpu/mcheck.  But it will compile with
gcc-4.3.3.
-----
-----
linux-2.6.29-zen1
gcc svn version 20090331-x86_64
environment variables: export CC="gcc -Wp,-K -Wp,-W0 -save-temps " export
CXX="g++ -Wp,-K -Wp,-W0 -save-temps "
-----
-----
Output of gcc -v:

Using built-in specs.
Target: x86_64-pc-linux
Configured with: ../gcc-20090331/configure --prefix=/usr --libdir=/usr/lib
--enable-shared --enable-bootstrap
--enable-languages=ada,c,c++,fortran,java,objc --enable-threads=posix
--enable-checking=release --with-system-zlib --disable-libunwind-exceptions
--enable-__cxa_atexit --disable-libssp --with-gnu-ld --verbose
--disable-multilib --target=x86_64-pc-linux --build=x86_64-pc-linux
--host=x86_64-pc-linux
Thread model: posix
gcc version 4.5.0 20090331 (experimental) (GCC)
-----
-----
Error message:

  CC      arch/x86/kernel/cpu/mcheck/mce_64.o
arch/x86/kernel/cpu/mcheck/mce_64.c: In function 'mce_ioctl':
arch/x86/kernel/cpu/mcheck/mce_64.c:652: error: case label does not reduce to
an integer constant
arch/x86/kernel/cpu/mcheck/mce_64.c:654: error: case label does not reduce to
an integer constant
arch/x86/kernel/cpu/mcheck/mce_64.c:656: error: case label does not reduce to
an integer constant
make[3]: *** [arch/x86/kernel/cpu/mcheck/mce_64.o] Error 1
make[2]: *** [arch/x86/kernel/cpu/mcheck] Error 2
make[1]: *** [arch/x86/kernel/cpu] Error 2
make: *** [arch/x86/kernel] Error 2
-----
-----
Attached mce_64.i


-- 
           Summary: gcc 20090331 produces an error at mce64.c in kernel
                    2.6.29
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kdebugs at hotmail dot com
 GCC build triplet: x86_64-pc-linux
  GCC host triplet: x86_64-pc-linux
GCC target triplet: x86_64-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[kdebugs at hotmail dot com]

------- Comment #1 from kdebugs at hotmail dot com  2009-04-02 05:47 -------
Created an attachment (id=17578)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17578&action=view)
mce_64.i preprocessed file from kernel 2.6.29-zen

To create this file I used these environment variables in my /etc/profile:
export CC="gcc -Wp,-K -Wp,-W0 -save-temps " export CXX="g++ -Wp,-K -Wp,-W0
-save-temps "


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[hjl dot tools at gmail dot com]

------- Comment #2 from hjl dot tools at gmail dot com  2009-04-02 14:00 -------
(In reply to comment #1)
> Created an attachment (id=17578)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17578&action=view) [edit]
> mce_64.i preprocessed file from kernel 2.6.29-zen
> 
> To create this file I used these environment variables in my /etc/profile:
> export CC="gcc -Wp,-K -Wp,-W0 -save-temps " export CXX="g++ -Wp,-K -Wp,-W0
> -save-temps "
> 

Please show the comment used to compile arch/x86/kernel/cpu/mcheck/mce_64.o.
It should be in something like arch/x86/kernel/cpu/.mcheck/mce_64.o.cmd.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[hjl dot tools at gmail dot com]

------- Comment #3 from hjl dot tools at gmail dot com  2009-04-02 14:06 -------
(In reply to comment #1)
> Created an attachment (id=17578)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17578&action=view) [edit]
> mce_64.i preprocessed file from kernel 2.6.29-zen
> 

Please show how to reproduce the bug with mce_64.i.


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[hjl dot tools at gmail dot com]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1142 bytes --]



------- Comment #4 from hjl dot tools at gmail dot com  2009-04-02 15:36 -------
This is caused by revision 145254:

http://gcc.gnu.org/ml/gcc-cvs/2009-03/msg00761.html

extern unsigned int __invalid_size_argument_for_IOC;
static long mce_ioctl(unsigned int cmd)
{
 switch (cmd) {
   case (((2U) << (((0 +8)+8)+14)) | ((('M')) << (0 +8)) | (((1)) << 0) |
(((((sizeof(int) == sizeof(int[1]) && sizeof(int) < (1 << 14)) ? sizeof(int) :
__invalid_size_argument_for_IOC))) << ((0 +8)+8))):
  return 1;
 default:
  return 2;
 }
}

[hjl@gnu-16 rrs]$ ./145254/usr/bin/gcc -O -S pr39613.c  
pr39613.c: In function ‘mce_ioctl’:
pr39613.c:5: error: case label does not reduce to an integer constant
[hjl@gnu-16 rrs]$ 


-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jsm28 at gcc dot gnu dot org
   Last reconfirmed|0000-00-00 00:00:00         |2009-04-02 15:36:02
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[hjl dot tools at gmail dot com]

-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|2009-04-02 15:36:02         |2009-04-02 15:38:08
               date|                            |
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[hjl dot tools at gmail dot com]

-- 

hjl dot tools at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  GCC build triplet|x86_64-pc-linux             |
   GCC host triplet|x86_64-pc-linux             |
 GCC target triplet|x86_64-pc-linux             |
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[kdebugs at hotmail dot com]

------- Comment #5 from kdebugs at hotmail dot com  2009-04-02 18:24 -------
(In reply to comment #3)
> (In reply to comment #1)
> > Created an attachment (id=17578)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17578&action=view) [edit]
> > mce_64.i preprocessed file from kernel 2.6.29-zen
> > 
> 
> Please show how to reproduce the bug with mce_64.i.
> 

I did not find a mce_64.o.cmd in the entire kernel source.

But I just ran the following command for you:
gcc -c mce_64.i -o mce_64.o -O0

Attaching the result of that command as mceError.txt


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[kdebugs at hotmail dot com]

------- Comment #6 from kdebugs at hotmail dot com  2009-04-02 18:26 -------
Created an attachment (id=17579)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17579&action=view)
Result of gcc -c mce_64.i -o mce_64.o -O0


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[happyarch at gmail dot com]

------- Comment #7 from happyarch at gmail dot com  2009-04-04 17:25 -------
Hi, i have same problem.

TIA
=====================================================

  CC      arch/x86/kernel/cpu/mtrr/if.o
arch/x86/kernel/cpu/mtrr/if.c: In function :
arch/x86/kernel/cpu/mtrr/if.c:159: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:160: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:161: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:162: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:163: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:164: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:165: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:166: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:170: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:171: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:180: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:187: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:192: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:197: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:202: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:218: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:225: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:231: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:236: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:241: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:259: error: case label does not reduce to an
integer constant
arch/x86/kernel/cpu/mtrr/if.c:260: error: case label does not reduce to an
integer constant
make[3]: *** [arch/x86/kernel/cpu/mtrr/if.o] Error 1
make[2]: *** [arch/x86/kernel/cpu/mtrr] Error 2
make[1]: *** [arch/x86/kernel/cpu] Error 2
make: *** [arch/x86/kernel] Error 2
bash-4.0$ cc -v
Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc/configure --prefix=/usr --libexecdir=/usr/lib
--enable-shared --enable-threads=posix --enable-__cxa_atexit
--enable-clocale=gnu --enable-languages=c,c++ --disable-bootstrap
--disable-multilib
Thread model: posix
gcc version 4.5.0 20090404 (experimental) (GCC) 
bash-4.0$ 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[jsm28 at gcc dot gnu dot org]

------- Comment #8 from jsm28 at gcc dot gnu dot org  2009-04-07 23:46 -------
The expression is indeed not an integer constant expression and so not
valid for a case label in ISO C.  But I'll look at restricting the error
in this case to a pedwarn-if-pedantic if the case label folds to an integer
constant but is not an integer constant expression, to allow this code
to continue to work.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jsm28 at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-04-02 15:38:08         |2009-04-07 23:46:13
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[jsm28 at gcc dot gnu dot org]

------- Comment #9 from jsm28 at gcc dot gnu dot org  2009-04-09 00:20 -------
Subject: Bug 39613

Author: jsm28
Date: Thu Apr  9 00:20:08 2009
New Revision: 145793

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145793
Log:
        PR c/39613
        * c-typeck.c (do_case): If case label is not an INTEGER_CST, fold
        it and pedwarn if this results in an INTEGER_CST.

testsuite:
        * gcc.dg/case-const-1.c, gcc.dg/case-const-2.c,
        gcc.dg/case-const-3.c: New tests.

Added:
    trunk/gcc/testsuite/gcc.dg/case-const-1.c
    trunk/gcc/testsuite/gcc.dg/case-const-2.c
    trunk/gcc/testsuite/gcc.dg/case-const-3.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-typeck.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[jsm28 at gcc dot gnu dot org]

------- Comment #10 from jsm28 at gcc dot gnu dot org  2009-04-09 00:21 -------
Fixed for 4.5.


-- 

jsm28 at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
      Known to work|                            |4.5.0
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613

[Bug c/39613] gcc 20090331 produces an error at mce64.c in kernel 2.6.29

[hjl at gcc dot gnu dot org]

------- Comment #11 from hjl at gcc dot gnu dot org  2009-04-09 21:19 -------
Subject: Bug 39613

Author: hjl
Date: Thu Apr  9 21:19:29 2009
New Revision: 145858

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=145858
Log:
2009-04-09  H.J. Lu  <hongjiu.lu@intel.com>

        Backport from mainline:
        2009-04-09  Joseph Myers  <joseph@codesourcery.com>

        PR c/39613
        * gcc.dg/case-const-1.c: New.

        PR c/39614:
        * gcc.c-torture/compile/pr39614-1.c: New.

        PR c/39673:
        * gcc.c-torture/compile/pr39673-1.c: New.
        * gcc.c-torture/compile/pr39673-2.c: Likewise.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr39614-1.c
      - copied unchanged from r145857,
trunk/gcc/testsuite/gcc.c-torture/compile/pr39614-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr39673-1.c
      - copied unchanged from r145857,
trunk/gcc/testsuite/gcc.c-torture/compile/pr39673-1.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr39673-2.c
      - copied unchanged from r145857,
trunk/gcc/testsuite/gcc.c-torture/compile/pr39673-2.c
    branches/gcc-4_4-branch/gcc/testsuite/gcc.dg/case-const-1.c
      - copied unchanged from r145857,
trunk/gcc/testsuite/gcc.dg/case-const-1.c
Modified:
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39613