[Bug c++/26557] New: ICE in simplify_subreg

[Bug c++/26557] New: ICE in simplify_subreg

[debian-gcc at lists dot debian dot org]

[forwarded from http://bugs.debian.org/349083]

gcc version 4.0.3 20060212 (prerelease) (Debian 4.0.2-9)

falk@gluck:~% cat test.cc
struct sample_struct {
    static const int struct_test[];
};

const int sample_struct::struct_test[] = {1};

void g();

void f() {
    for(int i = 0; i < 1; ++i){
        switch(sample_struct::struct_test[i]) {
        case 1: g();
        }
    }
}

falk@gluck:~% g++ -c test.cc   
falk@gluck:~% g++ -c test.cc -O
test.cc: In function 'void f()':
test.cc:11: internal compiler error: in simplify_subreg, at simplify-rtx.c:3744
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
For Debian GNU/Linux specific bug reporting instructions,
see <URL:file:///usr/share/doc/gcc-4.0/README.Bugs>.

No problem with g++-3.3 (GCC) 3.3.6 (Debian 1:3.3.6-12)


-- 
           Summary: ICE in simplify_subreg
           Product: gcc
           Version: 4.0.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: debian-gcc at lists dot debian dot org
 GCC build triplet: i486-linux-gnu
  GCC host triplet: i486-linux-gnu
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1/4.2 Regression] ICE in simplify_subreg

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu dot
                   |                            |org
  GCC build triplet|i486-linux-gnu              |
   GCC host triplet|i486-linux-gnu              |
 GCC target triplet|i486-linux-gnu              |
           Keywords|                            |ice-on-valid-code
            Summary|ICE in simplify_subreg      |[4.0/4.1/4.2 Regression] ICE
                   |                            |in simplify_subreg
   Target Milestone|---                         |4.0.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1/4.2 Regression] ICE in simplify_subreg

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-03-04 15:49 -------
Confirmed, a C testcase:
extern  const int struct_test[];
const int struct_test[] = {1};
void g();
void f() {
  switch(struct_test[0]) {
    case 1: g();
  }
}


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-03-04 15:49:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1/4.2 Regression] ICE in simplify_subreg

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2006-03-04 15:53 -------
This is definitely a middle-end issue:
#0  fancy_abort (file=0xce9f78
"/home/pinskia/src/checkin/trunk/gcc/simplify-rtx.c", line=4402, 
    function=0xed4670 "simplify_subreg") at
/home/pinskia/src/checkin/trunk/gcc/diagnostic.c:642
#1  0x00000000009b119d in simplify_subreg (outermode=VOIDmode,
op=0x2aaaaafb1410, 
    innermode=DImode, byte=0) at
/home/pinskia/src/checkin/trunk/gcc/simplify-rtx.c:4402
#2  0x00000000009b1de3 in simplify_gen_subreg (outermode=VOIDmode,
op=0x2aaaaafb1410, 
    innermode=DImode, byte=0) at
/home/pinskia/src/checkin/trunk/gcc/simplify-rtx.c:4679
#3  0x00000000006bf81a in gen_lowpart_common (mode=VOIDmode, x=0x2aaaaafb1410)
    at /home/pinskia/src/checkin/trunk/gcc/emit-rtl.c:1158
#4  0x0000000000a366b3 in gen_lowpart_general (mode=VOIDmode, x=0x2aaaaafb1410)
    at /home/pinskia/src/checkin/trunk/gcc/rtlhooks.c:43
#5  0x00000000006ed801 in convert_modes (mode=VOIDmode, oldmode=SImode,
x=0x2aaaaafb1410, 
    unsignedp=0) at /home/pinskia/src/checkin/trunk/gcc/expr.c:822
#6  0x00000000009be5bb in emit_case_nodes (index=0x2aaaaafb1410,
node=0x2aaaab10cf90, 
    default_label=0x2aaaaafb2910, index_type=0x2aaaaafbb4d0)
    at /home/pinskia/src/checkin/trunk/gcc/stmt.c:2949
#7  0x00000000009bd129 in expand_case (exp=0x2aaaaafb24b0)
    at /home/pinskia/src/checkin/trunk/gcc/stmt.c:2509
----------
And has nothing to do with the array size not being defined at first.
Further reduced testcase:
const int struct_test[1] = {1};
void g();
void f() {
  switch(struct_test[0]) {
    case 1: g();
  }
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1/4.2 Regression] ICE in simplify_subreg

[mmitchel at gcc dot gnu dot org]

-- 

mmitchel at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|4.0.3                       |4.0.4


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1/4.2 Regression] ICE in simplify_subreg

[sayle at gcc dot gnu dot org]

------- Comment #3 from sayle at gcc dot gnu dot org  2006-03-13 23:47 -------
Subject: Bug 26557

Author: sayle
Date: Mon Mar 13 23:47:47 2006
New Revision: 112032

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112032
Log:

        PR middle-end/26557
        * stmt.c (emit_case_nodes): Handle the case where the index is a
        CONST_INT, where the comparison mode is specified by the index type.

        * gcc.c-torture/compile/switch-1.c: New test case.


Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/switch-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/stmt.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1 Regression] ICE in simplify_subreg

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-03-14 01:31 -------
Fix is now on the mainline.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.0.3 4.0.2 4.1.0 4.2.0     |4.0.3 4.0.2 4.1.0
      Known to work|3.4.0                       |3.4.0 4.2.0
            Summary|[4.0/4.1/4.2 Regression] ICE|[4.0/4.1 Regression] ICE in
                   |in simplify_subreg          |simplify_subreg


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0/4.1 Regression] ICE in simplify_subreg

[sayle at gcc dot gnu dot org]

------- Comment #5 from sayle at gcc dot gnu dot org  2006-03-14 19:19 -------
Subject: Bug 26557

Author: sayle
Date: Tue Mar 14 19:19:14 2006
New Revision: 112063

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112063
Log:

        PR middle-end/26557
        * stmt.c (emit_case_nodes): Handle the case where the index is a
        CONST_INT, where the comparison mode is specified by the index type.

        * gcc.c-torture/compile/switch-1.c: New test case.


Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.c-torture/compile/switch-1.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/stmt.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0 Regression] ICE in simplify_subreg

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2006-03-14 23:09 -------
Fixed also in 4.1.1 now.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|3.4.0 4.2.0                 |3.4.0 4.2.0 4.1.1
            Summary|[4.0/4.1 Regression] ICE in |[4.0 Regression] ICE in
                   |simplify_subreg             |simplify_subreg


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0 Regression] ICE in simplify_subreg

[sayle at gcc dot gnu dot org]

------- Comment #7 from sayle at gcc dot gnu dot org  2006-03-16 01:21 -------
Subject: Bug 26557

Author: sayle
Date: Thu Mar 16 01:20:57 2006
New Revision: 112111

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112111
Log:

        PR middle-end/26557
        * stmt.c (emit_case_nodes): Handle the case where the index is a
        CONST_INT, where the comparison mode is specified by the index type.

        * gcc.c-torture/compile/switch-1.c: New test case.


Added:
    branches/gcc-4_0-branch/gcc/testsuite/gcc.c-torture/compile/switch-1.c
Modified:
    branches/gcc-4_0-branch/gcc/ChangeLog
    branches/gcc-4_0-branch/gcc/stmt.c
    branches/gcc-4_0-branch/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0 Regression] ICE in simplify_subreg

[pinskia at gcc dot gnu dot org]

------- Comment #8 from pinskia at gcc dot gnu dot org  2006-03-16 02:48 -------
Fixed.


-- 

pinskia at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0 Regression] ICE in simplify_subreg

[kazu at gcc dot gnu dot org]

------- Comment #9 from kazu at gcc dot gnu dot org  2006-04-11 23:47 -------
Subject: Bug 26557

Author: kazu
Date: Tue Apr 11 23:47:35 2006
New Revision: 112870

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=112870
Log:
        Backport from mainline.
        2006-03-13  Roger Sayle  <roger@eyesopen.com>
        PR middle-end/26557
        * gcc/stmt.c (emit_case_nodes): Handle the case where the
        index is a CONST_INT, where the comparison mode is specified
        by the index type.

        2006-03-13  Roger Sayle  <roger@eyesopen.com>
        PR middle-end/26557
        * gcc/gcc.c-torture/compile/switch-1.c: New test case.

Added:
    branches/csl/sourcerygxx-4_1/gcc/testsuite/gcc.c-torture/compile/switch-1.c
Modified:
    branches/csl/sourcerygxx-4_1/ChangeLog.csl
    branches/csl/sourcerygxx-4_1/gcc/stmt.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557

[Bug middle-end/26557] [4.0 Regression] ICE in simplify_subreg

[stuart at gcc dot gnu dot org]

------- Comment #10 from stuart at gcc dot gnu dot org  2006-06-05 19:14 -------
Subject: Bug 26557

Author: stuart
Date: Mon Jun  5 19:14:11 2006
New Revision: 114403

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=114403
Log:
        Radar 4561329
        PR middle-end/26557
        * stmt.c (emit_case_nodes): Handle the case where the index is a
        CONST_INT, where the comparison mode is specified by the index type.
        * gcc.c-torture/compile/switch-1.c: New test case.

Added:
   
branches/apple-local-200502-branch/gcc/testsuite/gcc.c-torture/compile/switch-1.c
Modified:
    branches/apple-local-200502-branch/gcc/ChangeLog.apple-ppc
    branches/apple-local-200502-branch/gcc/stmt.c
    branches/apple-local-200502-branch/gcc/testsuite/ChangeLog.apple-ppc


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26557