[Bug rtl-optimization/46002] New: ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority

[Bug rtl-optimization/46002] New: ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46002

           Summary: ICE: in update_copy_costs, at ira-color.c:319 with
                    -fira-algorithm=priority
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz


Created attachment 22028
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=22028
reduced testcase

Command line:
$ gcc -fira-algorithm=priority -Os pr46002.c

Compiler output:
$ gcc -fira-algorithm=priority -Os pr46002.c 
pr46002.c: In function 'foo':
pr46002.c:9:1: internal compiler error: in update_copy_costs, at
ira-color.c:319
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r165354 - crash
r153685 - crash
4.4 r149995 - crash

[Bug rtl-optimization/46002] ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority

[ubizjak at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46002

Uros Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2010.10.13 15:16:39
                 CC|                            |ubizjak at gmail dot com
     Ever Confirmed|0                           |1

--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2010-10-13 15:16:39 UTC ---
Confirmed on x86_64-pc-linux-gnu, gdb backtrace:

#0  fancy_abort (file=0xd11b68 "../../gcc-svn/trunk/gcc/ira-color.c", 
    line=319, function=0xd12070 "update_copy_costs")
    at ../../gcc-svn/trunk/gcc/diagnostic.c:880
#1  0x00000000006e7ff8 in update_copy_costs (allocno=0x13799d8, 
    decr_p=<value optimized out>) at ../../gcc-svn/trunk/gcc/ira-color.c:319
#2  0x00000000006e93cf in assign_hard_reg (a=0x13799d8, retry_p=0 '\000')
    at ../../gcc-svn/trunk/gcc/ira-color.c:628
#3  0x00000000006eb393 in color_allocnos (loop_tree_node=0x136d5a0)
    at ../../gcc-svn/trunk/gcc/ira-color.c:1542
#4  color_pass (loop_tree_node=0x136d5a0)
    at ../../gcc-svn/trunk/gcc/ira-color.c:1670
#5  0x00000000006df24a in ira_traverse_loop_tree (bb_p=0 '\000', 
    loop_node=0x136d5a0, preorder_func=0x6e9a50 <color_pass>, postorder_func=0)
    at ../../gcc-svn/trunk/gcc/ira-build.c:1445
#6  0x00000000006eda89 in do_coloring ()
    at ../../gcc-svn/trunk/gcc/ira-color.c:1814
#7  color () at ../../gcc-svn/trunk/gcc/ira-color.c:3157
#8  ira_color () at ../../gcc-svn/trunk/gcc/ira-color.c:3273
#9  0x00000000006da494 in ira () at ../../gcc-svn/trunk/gcc/ira.c:3187
#10 rest_of_handle_ira () at ../../gcc-svn/trunk/gcc/ira.c:3342
#11 0x0000000000737d1f in execute_one_pass (pass=0x11b1180)
    at ../../gcc-svn/trunk/gcc/passes.c:1562
#12 0x0000000000737fb5 in execute_pass_list (pass=0x11b1180)

[Bug rtl-optimization/46002] ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority

[law at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46002

--- Comment #2 from Jeffrey A. Law <law at gcc dot gnu.org> 2011-02-21 17:43:18 UTC ---
Author: law
Date: Mon Feb 21 17:43:15 2011
New Revision: 170370

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170370
Log:

    PR rtl-optimization/46178
    * gcc.target/i386/pr46178.c: New test.

    PR rtl-optimization/46002
    * gcc.c-torture/compile/pr46002.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr46002.c
    trunk/gcc/testsuite/gcc.target/i386/pr46178.c
Modified:
    trunk/gcc/testsuite/ChangeLog

[Bug rtl-optimization/46002] ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46002

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2011-02-21 21:45:47 UTC ---
Still fail on Linux/x86-64 as of revision 170371:

[hjl@gnu-34 gcc]$ /export/gnu/import/svn/gcc-test-intel64corei7/bld/gcc/xgcc
-B/export/gnu/import/svn/gcc-test-intel64corei7/bld/gcc/ -Os
-fira-algorithm=priority -c -o pr46002.o
/export/gnu/import/svn/gcc-test-intel64corei7/src-trunk/gcc/testsuite/gcc.c-torture/compile/pr46002.c
-march=corei7
/export/gnu/import/svn/gcc-test-intel64corei7/src-trunk/gcc/testsuite/gcc.c-torture/compile/pr46002.c:
In function \u2018foo\u2019:
/export/gnu/import/svn/gcc-test-intel64corei7/src-trunk/gcc/testsuite/gcc.c-torture/compile/pr46002.c:10:1:
internal compiler error: in update_copy_costs, at ira-color.c:318
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-34 gcc]$

[Bug rtl-optimization/46002] ICE: in update_copy_costs, at ira-color.c:319 with -fira-algorithm=priority

[cltang at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46002

--- Comment #4 from Chung-Lin Tang <cltang at gcc dot gnu.org> 2011-02-22 03:23:24 UTC ---
Author: cltang
Date: Tue Feb 22 03:23:21 2011
New Revision: 170388

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=170388
Log:
2011-02-21  Chung-Lin Tang  <cltang@codesourcery.com>

    PR rtl-optimization/46002
    * ira-color.c (update_copy_costs): Change class intersection
    test to reg_class_contents[] test of 'hard_regno'.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ira-color.c