[Bug c/40351] New: ice in generate_subtree_copies for Linux kernel build

[Bug c/40351] New: ice in generate_subtree_copies for Linux kernel build

[dcb314 at hotmail dot com]

I just tried to compile the recent Linux kernel 2.6.29.4
with the GNU gcc version 4.5 snapshot 20090604.

The compiler said

arch/x86/kernel/io_apic.c:4182:1: internal compiler error: in
generate_subtree_copies, at tree-sra.c:1702
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Preprocessed source code attached. Flag -O2 required.


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           Summary: ice in generate_subtree_copies for Linux kernel build
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dcb314 at hotmail dot com
  GCC host triplet: x86_64-suse-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug c/40351] ice in generate_subtree_copies for Linux kernel build

[dcb314 at hotmail dot com]

------- Comment #1 from dcb314 at hotmail dot com  2009-06-05 10:57 -------
Created an attachment (id=17953)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17953&action=view)
gzipped C source code


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug tree-optimization/40351] [4.5 Regression] ice in generate_subtree_copies for Linux kernel build

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2009-06-05 11:40 -------
Reduced testcase, fails with -O.

struct IO_APIC_route_entry {
    unsigned int vector : 8;
    unsigned int delivery_mode : 1;
    unsigned int mask : 1;
    unsigned int __reserved_2 : 15;
    unsigned int __reserved_3 : 8;
} __attribute__ ((packed));
union entry_union {
    struct {
        unsigned int w1, w2;
    };
    struct IO_APIC_route_entry entry;
};
unsigned int io_apic_read(void);
struct IO_APIC_route_entry ioapic_read_entry(void)
{
  union entry_union eu;
  eu.w1 = io_apic_read();
  return eu.entry;
}


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org, mjambor at suse dot cz
             Status|UNCONFIRMED                 |NEW
          Component|c                           |tree-optimization
     Ever Confirmed|0                           |1
           Keywords|                            |ice-on-valid-code
   Last reconfirmed|0000-00-00 00:00:00         |2009-06-05 11:40:57
               date|                            |
            Summary|ice in                      |[4.5 Regression] ice in
                   |generate_subtree_copies for |generate_subtree_copies for
                   |Linux kernel build          |Linux kernel build
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug tree-optimization/40351] [4.5 Regression] ice in generate_subtree_copies for Linux kernel build

[jamborm at gcc dot gnu dot org]

------- Comment #3 from jamborm at gcc dot gnu dot org  2009-06-05 11:49 -------
Mine.


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jamborm at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jamborm at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2009-06-05 11:40:57         |2009-06-05 11:49:33
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug tree-optimization/40351] [4.5 Regression] ice in generate_subtree_copies for Linux kernel build

[jamborm at gcc dot gnu dot org]

------- Comment #4 from jamborm at gcc dot gnu dot org  2009-06-05 15:48 -------
Created an attachment (id=17955)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17955&action=view)
Fix

This patch fixes this problem.  I'll post it to the mailing list once
I get to bootstrap it which may take a while now.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug tree-optimization/40351] [4.5 Regression] ice in generate_subtree_copies for Linux kernel build

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2009-06-08 15:31 -------
*** Bug 40378 has been marked as a duplicate of this bug. ***


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |denis dot onischenko at
                   |                            |gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug tree-optimization/40351] [4.5 Regression] ice in generate_subtree_copies for Linux kernel build

[jamborm at gcc dot gnu dot org]

------- Comment #6 from jamborm at gcc dot gnu dot org  2009-06-09 16:53 -------
Subject: Bug 40351

Author: jamborm
Date: Tue Jun  9 16:52:57 2009
New Revision: 148315

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=148315
Log:
2009-06-09  Martin Jambor  <mjambor@suse.cz>

        PR tree-optimization/40351
        * tree-sra.c (propagate_subacesses_accross_link): Check that a refrence
        to a potential artifical subaccess can be constructed.

        * testsuite/gcc.c-torture/compile/pr40351.c: New file.


Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr40351.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-sra.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351

[Bug tree-optimization/40351] [4.5 Regression] ice in generate_subtree_copies for Linux kernel build

[jamborm at gcc dot gnu dot org]

------- Comment #7 from jamborm at gcc dot gnu dot org  2009-06-09 20:59 -------
Fixed.


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jamborm at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40351