[Bug tree-optimization/24665] New: internal compiler error: get_indirect_ref_operands

[Bug tree-optimization/24665] New: internal compiler error: get_indirect_ref_operands

[darin at usa dot net]

I get an internal compiler error when compiling the code below.  The compiler
error goes away if the "-fno-tree-ccp" is added to the command line.  The exact
error message is:

gccbug.cpp: In constructor 'Controller_t::Controller_t()':
gccbug.cpp:41: internal compiler error: in get_indirect_ref_operands, at
tree-ssa-operands.c:1453

This is not a duplicate of #21167.  That patch already appears to be in 4.0.2.

The "-v" option gives this configuration:
Using built-in specs.
Target: powerpc-603e-eabi
Configured with: /c/GCC/src/gcc-4.0.2/configure --target=powerpc-603e-eabi
--prefix=/c/GCC/powerpc-603e-eabi
--with-headers=/c/GCC/powerpc-603e-eabi/powerpc-603e-eabi/include
--with-local-prefix=/c/GCC/powerpc-603e-eabi/powerpc-603e-eabi --with-newlib
--with-cpu=603e --enable-cxx-flags=-mcpu=603e --disable-multilib --with-dwarf2
--enable-libstdcxx-debug --disable-c-mbchar --disable-nls --disable-threads
--enable-symvers=gnu --enable-__cxa_atexit --enable-languages=c,c++
--disable-shared --enable-c99 --enable-long-long --with-dwarf2
Thread model: single
gcc version 4.0.2

/c/gcc/powerpc-603e-eabi/bin/../libexec/gcc/powerpc-603e-eabi/4.0.2/cc1plus.exe
-quiet -v -iprefix
/c/gcc/powerpc-603e-eabi/bin/../lib/gcc/powerpc-603e-eabi/4.0.2/ gccbug.cpp
-quiet -dumpbase gccbug.cpp -mcpu=603e -auxbase gccbug -O2 -version -o
/c/DOCUME~1/djohnson/LOCALS~1/Temp/cckcPKQy.s

The exact code that generates this error is:
------------------
// Compile with -O2.
// compiler error goes away if "-fno-tree-ccp" is added

typedef unsigned long uint32_t;

// compiler error goes away if "const" is removed
typedef volatile uint32_t* const hwreg_t;

struct RegisterLayout
{
    uint32_t intmask;
};

struct Controller_t
{
public:
    Controller_t();

    inline void
    disableInterrupt()
    {
        *mpMaskRegister = 0;
    };

    static hwreg_t mpMaskRegister;
};

extern char SimulatedRegisters[];

// compiler error goes away if "volatile" is remove
#define MACHINE                                                         \
    (reinterpret_cast<volatile RegisterLayout*>(SimulatedRegisters))

hwreg_t Controller_t::mpMaskRegister = &MACHINE->intmask;

Controller_t::Controller_t()
{      
    disableInterrupt();
}


-- 
           Summary: internal compiler error: get_indirect_ref_operands
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: darin at usa dot net
  GCC host triplet: CYGWIN_NT-5.0
GCC target triplet: powerpc-603e-eabi


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   GCC host triplet|CYGWIN_NT-5.0               |
 GCC target triplet|powerpc-603e-eabi           |*-*-*
           Keywords|                            |ice-on-valid-code
            Summary|internal compiler error:    |[4.0/4.1 Regression]
                   |get_indirect_ref_operands   |internal compiler error:
                   |                            |get_indirect_ref_operands
   Target Milestone|---                         |4.0.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2005-11-04 05:06 -------
Confirmed, reduced testcase as far as I can get it (and is willing to try at
this point):
typedef unsigned long uint32_t;
typedef volatile uint32_t* const hwreg_t;
struct RegisterLayout
{
    uint32_t intmask;
};
struct Controller_t
{
    Controller_t();
    inline void
    disableInterrupt()
    {
        *mpMaskRegister = 0;
    };
    static hwreg_t mpMaskRegister;
};
extern char SimulatedRegisters[];
hwreg_t Controller_t::mpMaskRegister = &(reinterpret_cast<volatile
RegisterLayout*>(SimulatedRegisters))->intmask;
Controller_t::Controller_t()
{
    disableInterrupt();
}


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
      Known to fail|4.0.3 4.1.0                 |4.0.3 4.1.0 4.0.0
   Last reconfirmed|0000-00-00 00:00:00         |2005-11-04 05:06:42
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[janis at gcc dot gnu dot org]

------- Comment #2 from janis at gcc dot gnu dot org  2005-11-04 20:19 -------
A regression hunt identified the following patch:

http://gcc.gnu.org/viewcvs?view=rev&rev=89280

r89280 | rth | 2004-10-19 17:24:46 +0000 (Tue, 19 Oct 2004) | 4 lines

        PR middle-end/17885
        * tree.c (recompute_tree_invarant_for_addr_expr): Always poll address
        of INDIRECT_REF.


-- 

janis at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2005-11-05 20:30 -------
Something is not gimplifing an expression:
*(struct RegisterLayoutD.2065 *) (charD.3 *) &SimulatedRegistersD.2082
------
#   SimulatedRegistersD.2082_6 = V_MAY_DEF <SimulatedRegistersD.2082_5>;
((struct RegisterLayoutD.2065 *) (charD.3 *)
&SimulatedRegistersD.2082)->intmaskD.2067 = 0


CCP it looks like.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2005-11-05 20:34 -------
Lattice value changed to CONSTANT &((struct RegisterLayout *) (char *)
&SimulatedRegisters)->intmask.  Adding SSA edges to worklist.

Substituing values and folding statements

Folded statement: mpMaskRegister.0_4 = mpMaskRegister;
            into: mpMaskRegister.0_4 = &((struct RegisterLayout *) (char *)
&SimulatedRegisters)->intmask;


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[mmitchel at gcc dot gnu dot org]

------- Comment #5 from mmitchel at gcc dot gnu dot org  2005-11-19 01:39 -------
Showstopper.


-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[rth at gcc dot gnu dot org]

-- 

rth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rth at gcc dot gnu dot org
                   |dot org                     |
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2005-11-04 05:06:42         |2005-11-19 22:05:55
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[rth at gcc dot gnu dot org]

------- Comment #6 from rth at gcc dot gnu dot org  2005-11-20 05:37 -------
Subject: Bug 24665

Author: rth
Date: Sun Nov 20 05:37:08 2005
New Revision: 107244

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=107244
Log:
        PR tree-opt/24665
        * tree-gimple.c (is_gimple_id): Export.
        * tree-gimple.h (is_gimple_id): Declare.
        * tree-ssa-ccp.c (ccp_decl_initial_min_invariant): New.
        (get_default_value): Use it.
        (maybe_fold_stmt_indirect): Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/opt/pr24665.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-gimple.c
    trunk/gcc/tree-gimple.h
    trunk/gcc/tree-ssa-ccp.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[rth at gcc dot gnu dot org]

------- Comment #7 from rth at gcc dot gnu dot org  2005-11-20 19:04 -------
Subject: Bug 24665

Author: rth
Date: Sun Nov 20 19:03:53 2005
New Revision: 107259

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=107259
Log:
        PR tree-opt/24665
        * tree-gimple.c (is_gimple_id): Export.
        * tree-gimple.h (is_gimple_id): Declare.
        * tree-ssa-ccp.c (ccp_decl_initial_min_invariant): New.
        (get_default_value): Use it.
        (maybe_fold_stmt_indirect): Likewise.

Added:
    branches/gcc-4_0-branch/gcc/testsuite/g++.dg/opt/pr24665.C
      - copied unchanged from r107245, trunk/gcc/testsuite/g++.dg/opt/pr24665.C
Modified:
    branches/gcc-4_0-branch/gcc/ChangeLog
    branches/gcc-4_0-branch/gcc/tree-gimple.c
    branches/gcc-4_0-branch/gcc/tree-gimple.h
    branches/gcc-4_0-branch/gcc/tree-ssa-ccp.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[rth at gcc dot gnu dot org]

------- Comment #8 from rth at gcc dot gnu dot org  2005-11-20 19:05 -------
Subject: Bug 24665

Author: rth
Date: Sun Nov 20 19:05:43 2005
New Revision: 107260

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=107260
Log:
        PR tree-opt/24665
        * tree-gimple.c (is_gimple_id): Export.
        * tree-gimple.h (is_gimple_id): Declare.
        * tree-ssa-ccp.c (ccp_decl_initial_min_invariant): New.
        (get_default_value): Use it.
        (maybe_fold_stmt_indirect): Likewise.

Added:
    branches/gcc-4_1-branch/gcc/testsuite/g++.dg/opt/pr24665.C
      - copied unchanged from r107244, trunk/gcc/testsuite/g++.dg/opt/pr24665.C
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/tree-gimple.c
    branches/gcc-4_1-branch/gcc/tree-gimple.h
    branches/gcc-4_1-branch/gcc/tree-ssa-ccp.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665

[Bug tree-optimization/24665] [4.0/4.1 Regression] internal compiler error: get_indirect_ref_operands

[rth at gcc dot gnu dot org]

------- Comment #9 from rth at gcc dot gnu dot org  2005-11-20 19:06 -------
Fixed.


-- 

rth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24665