[Bug c/43614] New: ice in gimple_rhs_has_side_effects, at gimple.c:2248

[Bug c/43614] New: ice in gimple_rhs_has_side_effects, at gimple.c:2248

[regehr at cs dot utah dot edu]

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There was a big like this earlier but it's marked as resolved, so filing a new
one.

regehr@john-home:~/volatile/bugs/tmp296$ current-gcc -O small.c -c
small.c: In function ‘main’:
small.c:5:5: internal compiler error: in gimple_rhs_has_side_effects, at
gimple.c:2248
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

regehr@john-home:~/volatile/bugs/tmp296$ cat small.c

volatile int g_2[7];

void foo (unsigned);

int main (void)
{
  int i_459 = 0;
  int t2818;
  int t2819;
  volatile char *t2820;
  int t2821;
  volatile char *t2822;
  int *t2823;
  unsigned t2824;
LL655:
  t2822 = (volatile char *)g_2;
  t2821 = i_459;
  t2820 = t2822 + t2821;
  t2823 = (int *)t2820;
  t2824 = *t2823;
  foo (t2824);
  t2818 = i_459;
  t2819 = t2818 + 1;
  i_459 = t2819;
  goto LL655;
}

regehr@john-home:~/volatile/bugs/tmp296$ current-gcc -v

Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/home/regehr/z/compiler-install/gcc-r157896-install/libexec/gcc/i686-pc-linux-gnu/4.5.0/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r157896-install
--program-prefix=r157896- --enable-languages=c,c++
Thread model: posix
gcc version 4.5.0 20100331 (experimental) (GCC)


-- 
           Summary: ice in gimple_rhs_has_side_effects, at gimple.c:2248
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: regehr at cs dot utah dot edu
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug middle-end/43614] [4.5 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2010-04-01 03:07 -------
# VUSE <.MEM_13>
D.1996_8 = MEM[symbol: g_2, index: D.2003_16];


We should not have any VOPs here as this statement is volatile.


-- 

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         |2010-04-01 03:07:50
               date|                            |
            Summary|ice in                      |[4.5 Regression] ice in
                   |gimple_rhs_has_side_effects,|gimple_rhs_has_side_effects,
                   |at gimple.c:2248            |at gimple.c:2248
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug middle-end/43614] [4.5 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2010-04-01 03:09 -------
But that is not a regression as 4.3.2 have:
  # VUSE <g_2_13>
  D.1207_8 = MEM[symbol: g_2, index: D.1220_19];

4.1 is also broken:
  #   VUSE <g_2_14>;
  D.1624_9 = MEM[symbol: g_2, base: D.1674_4];


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4/4.5 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2010-04-01 14:21 -------
Looks like a tuples issue in IVOPTs.  Mine.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|middle-end                  |tree-optimization
      Known to fail|                            |4.4.3 4.5.0
      Known to work|                            |4.3.4
            Summary|[4.5 Regression] ice in     |[4.4/4.5 Regression] ice in
                   |gimple_rhs_has_side_effects,|gimple_rhs_has_side_effects,
                   |at gimple.c:2248            |at gimple.c:2248
   Target Milestone|4.5.0                       |4.4.4
            Version|unknown                     |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4/4.5 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |rguenth at gcc dot gnu dot
                   |dot org                     |org
             Status|NEW                         |ASSIGNED
   Last reconfirmed|2010-04-01 03:07:50         |2010-04-01 14:22:08
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4/4.5 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[rguenth at gcc dot gnu dot org]

------- Comment #4 from rguenth at gcc dot gnu dot org  2010-04-01 14:35 -------
The issue is that build6 looks at TMR_SYMBOL to set TREE_SIDE_EFFECTS, but
really TMRs volatileness or side-effectness depends on the original reference
it was created from, not TMR_SYMBOL.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4/4.5 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2010-04-01 16:18 -------
Subject: Bug 43614

Author: rguenth
Date: Thu Apr  1 16:18:07 2010
New Revision: 157913

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=157913
Log:
2010-04-01  Richard Guenther  <rguenther@suse.de>

        PR middle-end/43614
        * tree-ssa-address.c (copy_mem_ref_info): Copy TREE_SIDE_EFFECTS
        and TREE_THIS_VOLATILE.
        (copy_ref_info): Likewise.
        * tree-ssa-operands.c (get_tmr_operands): Check TREE_THIS_VOLATILE.
        * tree.c (build6_stat): Ignore side-effects of all but arg5
        for TARGET_MEM_REF.  Set TREE_THIS_VOLATILE from arg5 of
        TARGET_MEM_REF.

        * gcc.c-torture/compile/pr43614.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.c-torture/compile/pr43614.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-address.c
    trunk/gcc/tree-ssa-loop-ivopts.c
    trunk/gcc/tree-ssa-operands.c
    trunk/gcc/tree.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[rguenth at gcc dot gnu dot org]

------- Comment #6 from rguenth at gcc dot gnu dot org  2010-04-01 16:25 -------
Fixed on trunk sofar.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|4.4.3 4.5.0                 |4.4.3
      Known to work|4.3.4                       |4.3.4 4.5.0
            Summary|[4.4/4.5 Regression] ice in |[4.4 Regression] ice in
                   |gimple_rhs_has_side_effects,|gimple_rhs_has_side_effects,
                   |at gimple.c:2248            |at gimple.c:2248


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[jakub at gcc dot gnu dot org]

------- Comment #7 from jakub at gcc dot gnu dot org  2010-04-08 11:28 -------
Subject: Bug 43614

Author: jakub
Date: Thu Apr  8 11:28:06 2010
New Revision: 158117

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=158117
Log:
        Backport from mainline:
        2010-04-01  Richard Guenther  <rguenther@suse.de>

        PR middle-end/43614
        * tree-ssa-address.c (copy_mem_ref_info): Copy TREE_SIDE_EFFECTS
        and TREE_THIS_VOLATILE.
        (copy_ref_info): Likewise.
        * tree-ssa-operands.c (get_tmr_operands): Check TREE_THIS_VOLATILE.
        * tree.c (build7_stat): Ignore side-effects of all but arg5
        for TARGET_MEM_REF.  Set TREE_THIS_VOLATILE from arg5 of
        TARGET_MEM_REF.

        * gcc.c-torture/compile/pr43614.c: New testcase.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr43614.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_4-branch/gcc/tree-ssa-address.c
    branches/gcc-4_4-branch/gcc/tree-ssa-loop-ivopts.c
    branches/gcc-4_4-branch/gcc/tree-ssa-operands.c
    branches/gcc-4_4-branch/gcc/tree.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614

[Bug tree-optimization/43614] [4.4 Regression] ice in gimple_rhs_has_side_effects, at gimple.c:2248

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2010-04-08 11:34 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43614