[Bug middle-end/55630] New: [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[Bug middle-end/55630] New: [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

             Bug #: 55630
           Summary: [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98
                    (internal compiler error)
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: danglin@gcc.gnu.org
              Host: hppa2.0w-hp-hpux11.11
            Target: hppa2.0w-hp-hpux11.11
             Build: hppa2.0w-hp-hpux11.11


Executing on host: /test/gnu/gcc/objdir/gcc/testsuite/g++/../../xg++
-B/test/gnu/gcc/objdir/gcc/testsuite/g++/../../
/test/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48
660.C  -fno-diagnostics-show-caret  -nostdinc++
-I/test/gnu/gcc/objdir/hppa2.0w-
hp-hpux11.11/libstdc++-v3/include/hppa2.0w-hp-hpux11.11
-I/test/gnu/gcc/objdir/h
ppa2.0w-hp-hpux11.11/libstdc++-v3/include
-I/test/gnu/gcc/gcc/libstdc++-v3/libsu
pc++ -I/test/gnu/gcc/gcc/libstdc++-v3/include/backward
-I/test/gnu/gcc/gcc/libst
dc++-v3/testsuite/util -fmessage-length=0 -std=c++98  -pedantic-errors
-Wno-long
-long  -S  -o pr48660.s    (timeout = 300)
spawn /test/gnu/gcc/objdir/gcc/testsuite/g++/../../xg++
-B/test/gnu/gcc/objdir/gcc/testsuite/g++/../../
/test/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C -fno-di
agnostics-show-caret -nostdinc++
-I/test/gnu/gcc/objdir/hppa2.0w-hp-hpux11.11/libstdc++-v3/include/hppa2.0w-hp-hpux11.11
-I/test/gnu/gcc/objdir/hppa2.0w-hp-hpux
11.11/libstdc++-v3/include -I/test/gnu/gcc/gcc/libstdc++-v3/libsupc++
-I/test/gn
u/gcc/gcc/libstdc++-v3/include/backward
-I/test/gnu/gcc/gcc/libstdc++-v3/testsui
te/util -fmessage-length=0 -std=c++98 -pedantic-errors -Wno-long-long -S -o
pr48
660.s
/test/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C: In member function 'virtual
va
l<2> Derived::_ZTv0_n16_NK7Derived4get2Ev() const':
/test/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C:16:18: internal compiler
error:
 in simplify_subreg, at simplify-rtx.c:5682
libbacktrace could not find executable to openPlease submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
compiler exited with status 1
output is:
/test/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C: In member function 'virtual
val<2> Derived::_ZTv0_n16_NK7Derived4get2Ev() const':
/test/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C:16:18: internal compiler
error: in simplify_subreg, at simplify-rtx.c:5682
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)
FAIL: g++.dg/pr48660.C -std=c++98 (test for excess errors)

Same with -std=c++11.

Introduced between 192636 and 192894.

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ice-on-valid-code
           Priority|P3                          |P1
   Target Milestone|---                         |4.8.0

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-11 11:34:16 UTC ---
Can't reproduce with a cross compiler, not even 32-bit HWI one.

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

John David Anglin <danglin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|hppa2.0w-hp-hpux11.11       |hppa*-*-* (32-bit)
               Host|hppa2.0w-hp-hpux11.11       |hppa*-*-* (32-bit)
              Build|hppa2.0w-hp-hpux11.11       |hppa*-*-* (32-bit)

--- Comment #2 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-11 23:50:06 UTC ---
Have backtrace on linux:

Compiler executable checksum: 2471c145ed09407ba32da95e98d20f8f
/home/dave/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C: In member function
‘virtu
al val<2> Derived::_ZTv0_n16_NK7Derived4get2Ev() const’:
/home/dave/gnu/gcc/gcc/gcc/testsuite/g++.dg/pr48660.C:16:18: internal compiler
e
rror: in simplify_subreg, at simplify-rtx.c:5682
0x6f3353 simplify_subreg(machine_mode, rtx_def*, machine_mode, unsigned int)
        ../../gcc/gcc/simplify-rtx.c:5682
0x6f3707 simplify_gen_subreg(machine_mode, rtx_def*, machine_mode, unsigned
int)
        ../../gcc/gcc/simplify-rtx.c:5906
0x473c83 operand_subword_force(rtx_def*, unsigned int, machine_mode)
        ../../gcc/gcc/emit-rtl.c:1441
0x4a3f83 copy_blkmode_to_reg(machine_mode, tree_node*)
        ../../gcc/gcc/expr.c:2256
0x4a7d6b expand_assignment(tree_node*, tree_node*, bool)
        ../../gcc/gcc/expr.c:4924
0x3bb26f expand_call_stmt
        ../../gcc/gcc/cfgexpand.c:2113
0x3bb26f expand_gimple_stmt_1
        ../../gcc/gcc/cfgexpand.c:2153
0x3bb26f expand_gimple_stmt
        ../../gcc/gcc/cfgexpand.c:2305
0x3bcd7f expand_gimple_tailcall
        ../../gcc/gcc/cfgexpand.c:2352
0x3bcd7f expand_gimple_basic_block
        ../../gcc/gcc/cfgexpand.c:4061
0x3be11f gimple_expand_cfg
        ../../gcc/gcc/cfgexpand.c:4603

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

--- Comment #3 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-12 00:12:13 UTC ---
Breakpoint 1, simplify_subreg (outermode=SImode, op=0x40660c70, 
    innermode=BLKmode, byte=0) at ../../gcc/gcc/simplify-rtx.c:5682
5682      gcc_assert (innermode != BLKmode);
(gdb) cond 2 op==0x40660c70
(gdb) bt
#0  simplify_subreg (outermode=SImode, op=0x40660c70, innermode=BLKmode, 
    byte=0) at ../../gcc/gcc/simplify-rtx.c:5682
#1  0x0074dc18 in simplify_gen_subreg (outermode=SImode, op=0x40660c70, 
    innermode=BLKmode, byte=0) at ../../gcc/gcc/simplify-rtx.c:5906
#2  0x0049dd78 in operand_subword (op=0x40660c70, offset=7, 
    validate_address=0, mode=BLKmode) at ../../gcc/gcc/emit-rtl.c:1428
#3  0x0049ddc0 in operand_subword_force (op=0x40660c70, offset=0, mode=BLKmode)
    at ../../gcc/gcc/emit-rtl.c:1441
#4  0x004cc7e4 in copy_blkmode_to_reg (mode=HImode, src=<optimized out>)
    at ../../gcc/gcc/expr.c:2256
#5  0x004d5514 in expand_assignment (to=0x4063d870, from=0x4065e680, 
    nontemporal=false) at ../../gcc/gcc/expr.c:4924
#6  0x003e1d84 in expand_call_stmt (stmt=0x406609f0)
    at ../../gcc/gcc/cfgexpand.c:2113
#7  expand_gimple_stmt_1 (stmt=0x406609f0) at ../../gcc/gcc/cfgexpand.c:2153
#8  expand_gimple_stmt (stmt=0x406609f0) at ../../gcc/gcc/cfgexpand.c:2305
#9  0x003e26a4 in expand_gimple_tailcall (bb=0xc02a98, stmt=0xbf1284, 
    can_fallthru=0x24) at ../../gcc/gcc/cfgexpand.c:2352
#10 0x003e402c in expand_gimple_basic_block (bb=0x4064aa00, 
    disable_tail_calls=<optimized out>) at ../../gcc/gcc/cfgexpand.c:4061
#11 0x003e6f4c in gimple_expand_cfg () at ../../gcc/gcc/cfgexpand.c:4603
#12 0x006a6714 in execute_one_pass (pass=0x1) at ../../gcc/gcc/passes.c:2335
#13 0x006a6b7c in execute_pass_list (pass=0xd81050)
---Type <return> to continue, or q <return> to quit---
    at ../../gcc/gcc/passes.c:2383
#14 0x0040caf0 in expand_function (node=0x4062f738)
    at ../../gcc/gcc/cgraphunit.c:1641
#15 0x0040d394 in cgraph_process_new_functions ()
    at ../../gcc/gcc/cgraphunit.c:335
#16 0x0040eda0 in compile () at ../../gcc/gcc/cgraphunit.c:2047
#17 0x0040f210 in finalize_compilation_unit ()
    at ../../gcc/gcc/cgraphunit.c:2120
#18 0x001decb0 in cp_write_global_declarations ()
    at ../../gcc/gcc/cp/decl2.c:4292
#19 0x0076b1c8 in compile_file () at ../../gcc/gcc/toplev.c:559
#20 0x0076d3c4 in do_compile () at ../../gcc/gcc/toplev.c:1878
#21 toplev_main (argc=16, argv=0xfbf02024) at ../../gcc/gcc/toplev.c:1954
#22 0x00b317e8 in main (argc=<optimized out>, argv=<optimized out>)
    at ../../gcc/gcc/main.c:36
(gdb) p innermode
$4 = BLKmode
(gdb) p debug_rtx (op)
(reg:HI 105)
$5 = void

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

--- Comment #4 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-12 01:00:59 UTC ---
Introduced between 192625 and 192884.

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

--- Comment #5 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-12 01:12:06 UTC ---
dave@mx3210:~/gnu/gcc/objdir/gcc$ ./xgcc -B./ -v
Reading specs from ./specs
COLLECT_GCC=./xgcc
COLLECT_LTO_WRAPPER=./lto-wrapper
Target: hppa-linux-gnu
Configured with: ../gcc/configure --with-gnu-as --with-gnu-ld --enable-shared
--enable-multiarch --with-multiarch-defaults=hppa-linux-gnu
--enable-linker-build-id --build=hppa-linux-gnu --host=hppa-linux-gnu
--target=hppa-linux-gnu --prefix=/home/dave/opt/gnu/gcc/gcc-4.8
--with-local-prefix=/home/dave/opt/gnu --enable-threads=posix
--enable-__cxa_atexit --build=hppa-linux-gnu --enable-clocale=gnu
--enable-java-gc=boehm
--enable-languages=c,c++,objc,fortran,obj-c++,java,ada,lto
Thread model: posix
gcc version 4.8.0 20121211 (experimental) [trunk revision 194379] (GCC)

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[danglin at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

--- Comment #6 from John David Anglin <danglin at gcc dot gnu.org> 2012-12-12 03:58:29 UTC ---
Introduced by the following commit:

Author: ebotcazou
Date: Sat Oct 20 21:00:23 2012
New Revision: 192641

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192641
Log:
    PR rtl-optimization/54315
    * calls.c (expand_call): Don't deal specifically with BLKmode values
    returned in naked registers.
    * expr.h (copy_blkmode_from_reg): Adjust prototype.
    * expr.c (copy_blkmode_from_reg): Rename first parameter into TARGET and
    make it required.  Assert that SRCREG hasn't BLKmode.  Add a couple of 
    short-circuits for common cases and be prepared for sub-word registers.
    (expand_assignment): Call copy_blkmode_from_reg for BLKmode values
    returned in naked registers.
    (store_expr): Likewise.
    (store_field): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/calls.c
    trunk/gcc/expr.c
    trunk/gcc/expr.h

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-12-13
                 CC|                            |ebotcazou at gcc dot
                   |                            |gnu.org
     Ever Confirmed|0                           |1

--- Comment #7 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-12-13 09:39:39 UTC ---
Weird.  I convinced myself when I wrote this that the PA couldn't make use of
the copy_blkmode_from_reg path anymore because it wraps everything in a
PARALLEL, so I mainly tested it on the MIPS instead.  In any case, confirmed
with a cross.

[Bug middle-end/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|ebotcazou at gcc dot        |
                   |gnu.org                     |
         AssignedTo|unassigned at gcc dot       |ebotcazou at gcc dot
                   |gnu.org                     |gnu.org

--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-12-13 10:15:22 UTC ---
Fixing.

[Bug rtl-optimization/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|middle-end                  |rtl-optimization

--- Comment #9 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-12-16 09:46:57 UTC ---
Recategorizing.

[Bug rtl-optimization/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-12-16 10:02:43 UTC ---
Author: ebotcazou
Date: Sun Dec 16 10:02:37 2012
New Revision: 194530

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=194530
Log:
    PR rtl-optimization/55630
    * expr.c (expand_assignment): Do not call copy_blkmode_to_reg to move
    BLKmode return values to the return register.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/expr.c

[Bug rtl-optimization/55630] [4.8 Regression] FAIL: g++.dg/pr48660.C -std=c++98 (internal compiler error)

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55630

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

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

--- Comment #11 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-12-16 10:04:59 UTC ---
.