[Bug middle-end/32423] New: gcc.c-torture/compile/20020604-1.c ICEs

[Bug middle-end/32423] New: gcc.c-torture/compile/20020604-1.c ICEs

[kazu at gcc dot gnu dot org]

gcc.c-torture/compile/20020604-1.c ICEs if compiled with
-O3 -fomit-frame-pointer -mcpu=5485.

Here is a reduced testcase min.c.

unsigned int
foo (unsigned int n)
{
  float c[8192];
  unsigned int i;
  unsigned int d = 0;
  union {
    float r;
    unsigned int i;
  } e;
  for (i = 0; i < n; i++)
    {
      e.r = c[i];
      d = e.i;
    }
  return d;
}


I get:

$ ./cc1 -quiet -O3 -fomit-frame-pointer -mcpu=5485 min.c
min.c: In function 'foo':
min.c:17: error: insn does not satisfy its constraints:
(insn 42 73 43 5 min.c:13 (set (mem/s/c:SF (plus:SI (reg/f:SI 15 %sp)
                (reg:SI 2 %d2)) [0 e.r+0 S4 A16])
        (mem/s:SF (post_inc:SI (reg:SI 8 %a0 [orig:55 ivtmp.30 ] [55])) [3 c S4
A16])) 46 {movsf_cf_hard} (expr_list:REG_INC (reg:SI 8 %a0 [orig:55 ivtmp.30 ]
[55])
        (nil)))
min.c:17: internal compiler error: in reload_cse_simplify_operands, at
postreload.c:396
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.

A quick analysis shows that the following appears in min.c.172r.greg.

(insn 42 73 43 5 min.c:13 (set (mem/s/c:SF (plus:SI (reg/f:SI 15 %sp)
                (reg:SI 2 %d2)) [0 e.r+0 S4 A16])
        (mem/s:SF (post_inc:SI (reg:SI 8 %a0 [orig:55 ivtmp.30 ] [55])) [3 c S4
A16])) 46 {movsf_cf_hard} (expr_list:REG_INC (reg:SI 8 %a0 [orig:55 ivtmp.30 ]
[55])
        (nil)))

Notice that SET_SRC has an address of the form SP + D2, which is
invalid on ColdFire.


-- 
           Summary: gcc.c-torture/compile/20020604-1.c ICEs
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kazu at gcc dot gnu dot org
GCC target triplet: m68k-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423

[Bug target/32423] gcc.c-torture/compile/20020604-1.c ICEs

[zadeck at naturalbridge dot com]

------- Comment #1 from zadeck at naturalbridge dot com  2007-06-21 13:37 -------
What is the configure string that i use to recreate this?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423

[Bug target/32423] gcc.c-torture/compile/20020604-1.c ICEs

[kazu at gcc dot gnu dot org]

------- Comment #2 from kazu at gcc dot gnu dot org  2007-06-25 11:44 -------
Here is the command line for configure.

/scratch/kazu/ce/2007-06-23-1351-0/src/gcc-mainline/configure
--build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=m68k-elf
--enable-shared --enable-threads --disable-libmudflap --disable-libssp
--disable-libgomp --disable-libstdcxx-pch --with-arch=cf --disable-shared
--disable-threads --with-gnu-as --with-gnu-ld --with-newlib --disable-nls
--prefix=/opt/codesourcery --disable-shared --disable-threads --disable-libssp
--disable-libgomp --without-headers --with-newlib --disable-decimal-float
--enable-languages=c --with-sysroot=/opt/codesourcery/m68k-elf
--with-build-sysroot=/scratch/kazu/ce/2007-06-23-1351-0/install/m68k-elf
--enable-poison-system-directories
--with-build-time-tools=/scratch/kazu/ce/2007-06-23-1351-0/install/m68k-elf/bin
--with-build-time-tools=/scratch/kazu/ce/2007-06-23-1351-0/install/m68k-elf/bin


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423

[Bug target/32423] gcc.c-torture/compile/20020604-1.c ICEs

[kazu at gcc dot gnu dot org]

------- Comment #3 from kazu at gcc dot gnu dot org  2007-06-25 11:50 -------
Richard Sandiford says that this bug is probably what
MODE_INDEX_REG_CLASS is intended to fix.  Unfortunately, the patch to
add MODE_INDEX_REG_CLASS

  http://gcc.gnu.org/ml/gcc-patches/2007-01/msg00782.html

has been rejected.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423

[Bug target/32423] gcc.c-torture/compile/20020604-1.c ICEs

[zadeck at naturalbridge dot com]

------- Comment #4 from zadeck at naturalbridge dot com  2007-06-26 02:19 -------
so kazu,

is there anything that i need to do with this bug?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423

[Bug target/32423] gcc.c-torture/compile/20020604-1.c ICEs

[schwab at suse dot de]

------- Comment #5 from schwab at suse dot de  2008-03-30 22:49 -------
No longer reproducible on the trunk.


-- 

schwab at suse dot de changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423

[Bug target/32423] gcc.c-torture/compile/20020604-1.c ICEs

[schwab at linux-m68k dot org]

------- Comment #6 from schwab at linux-m68k dot org  2009-08-23 18:40 -------
No longer reproducible with 4.4.0, assuming fixed.


-- 

schwab at linux-m68k dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32423