[Bug other/61391] New: [4.10 Regression] ICE in execute_one_pass at -O3 and above

[Bug other/61391] New: [4.10 Regression] ICE in execute_one_pass at -O3 and above

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

            Bug ID: 61391
           Summary: [4.10 Regression] ICE in execute_one_pass at -O3 and
                    above
           Product: gcc
           Version: 4.10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: asolokha at gmx dot com

At least 4.10.0-alpha20140525 and newer ICEs when compiling the following code
at -O3 or -Ofast:

short int u;
int h;
int i;

void
p(void)
{
  int c[2] = { 0 };
  for (h = 0; h < 2; ++h) {
    static int *l = &h;
    int t;
    int n;
    for (t = 0; t < 7; ++t)
      c[0] = (i & -(short int)(c[h+1] || (u = -(n != *l))) || c[h+1]);
  }
}

f55ba4cd.c: In function 'p':
f55ba4cd.c:6:1: internal compiler error: Segmentation fault
 p(void)
 ^

Unfortunately I cannot provide a meaningful stack trace because stack seems to
be corrupted. The last active frame seems to be of execute_one_pass(opt_pass*),
and "gdb disassemble" gives the following on x86_64:

<snipped>
   0x00000000008047b7 <+677>:    xor    %eax,%eax
   0x00000000008047b9 <+679>:    jmpq   0x804630
<_Z16execute_one_passP8opt_pass+286>
   0x00000000008047be <+684>:    mov    0x0(%rbp),%rax
   0x00000000008047c2 <+688>:    mov    0xb12b4f(%rip),%rsi        # 0x1317318
<cfun>
   0x00000000008047c9 <+695>:    mov    %rbp,%rdi
   0x00000000008047cc <+698>:    callq  *0x20(%rax)
=> 0x00000000008047cf <+701>:    mov    %eax,%r13d
   0x00000000008047d2 <+704>:    xor    %esi,%esi
   0x00000000008047d4 <+706>:    mov    $0x8023f0,%edi
   0x00000000008047d9 <+711>:    callq  0x802af2
   0x00000000008047de <+716>:    jmp    0x804795
<_Z16execute_one_passP8opt_pass+643>
   0x00000000008047e0 <+718>:    test   %rsi,%rsi
   0x00000000008047e3 <+721>:    jne    0x8047f3
<_Z16execute_one_passP8opt_pass+737>
   0x00000000008047e5 <+723>:    cmpq   $0x0,0xbc1bbb(%rip)        # 0x13c63a8
<current_function_decl>
</snipped>

[Bug other/61391] [4.10 Regression] ICE in execute_one_pass at -O3 and above

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

Arseny Solokha <asolokha at gmx dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |x86_64-pc-linux-gnu

--- Comment #1 from Arseny Solokha <asolokha at gmx dot com> ---
This ICE is probably target-dependent, but at least it is reproducible for
x86_64-pc-linux-gnu.

[Bug other/61391] [4.10 Regression] ICE in execute_one_pass at -O3 and above

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-06-03
                 CC|                            |ysrumyan at gmail dot com
   Target Milestone|---                         |4.10.0
     Ever confirmed|0                           |1

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.

Backtrace:

#0  0x0000000000c6bdcb in bb_predicate (bb=<basic_block 0x7ffff6d49d68 (14)>)
    at /space/rguenther/src/svn/trunk/gcc/tree-if-conv.c:149
#1  0x0000000000c6c127 in is_predicated (bb=<basic_block 0x7ffff6d49d68 (14)>)
    at /space/rguenther/src/svn/trunk/gcc/tree-if-conv.c:275
#2  0x0000000000c6f101 in is_cond_scalar_reduction (
    phi=<gimple_phi 0x7ffff6d82300>, reduc=0x7fffffffd888, op0=0x7fffffffd898, 
    op1=0x7fffffffd890)
    at /space/rguenther/src/svn/trunk/gcc/tree-if-conv.c:1442
#3  0x0000000000c6f63c in predicate_scalar_phi (
    phi=<gimple_phi 0x7ffff6d82300>, cond=<ne_expr 0x7ffff6d8b0f0>, 
    true_bb=<basic_block 0x7ffff6d7e958 (27)>, gsi=0x7fffffffd970)
    at /space/rguenther/src/svn/trunk/gcc/tree-if-conv.c:1583
#4  0x0000000000c6f8b4 in predicate_all_scalar_phis (loop=0x7ffff6c309c0)
    at /space/rguenther/src/svn/trunk/gcc/tree-if-conv.c:1637

[Bug other/61391] [4.10 Regression] ICE in execute_one_pass at -O3 and above

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

--- Comment #3 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
A check that stmt-bb belongs to loop is missed in is_cond_scalar_reduction, if
we add the following lines

   if (gimple_code (stmt) != GIMPLE_ASSIGN
       || gimple_has_volatile_ops (stmt))
     return false;
+  
+  if (!flow_bb_inside_loop_p (loop, gimple_bb (stmt)))
+    return false;
 test will be compiled successfully.

I will prepare a patch after required testing completion.

[Bug other/61391] [4.10 Regression] ICE in execute_one_pass at -O3 and above

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

--- Comment #4 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
It turned out that wrong PR number was used in ChangeLog. In fact this bug was
fixed:

URL: http://gcc.gnu.org/viewcvs?rev=211263&root=gcc&view=rev
Log:
gcc/
    PR tree-optimization/61319
    * tree-if-conv.c (is_cond_scalar_reduction): Add missed check that
    stmt belongs to loop.

gcc/testsuite/
    * gcc.dg/torture/pr61319.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr61391.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-if-conv.c

[Bug other/61391] [5 Regression] ICE in execute_one_pass at -O3 and above

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

Arseny Solokha <asolokha at gmx dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |5.0
      Known to fail|4.10.0                      |

--- Comment #5 from Arseny Solokha <asolokha at gmx dot com> ---
Yuri, you probably forgot to close the bug…
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Subject: [Bug c++/63657] [4.9 regression] -Wunused-variable: warning supressed by virtual dtor
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc657

--- Comment #1 from petschy at gmail dot com ---
Bisected the regression:

commit a8b52ce38f3056e464457ba1e95efa25a8f08d07
Author: paolo <paolo@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed Jun 12 21:36:36 2013 +0000

    /cp
    2013-06-12  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/38958
        * decl.c (poplevel): For the benefit of -Wunused-variable see
        through references.

    /testsuite
    2013-06-12  Paolo Carlini  <paolo.carlini@oracle.com>

        PR c++/38958
        * g++.dg/warn/Wunused-var-20.C: New.


    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200042
138bc75d-0d04-0410-961f-82ee72b054a4

[Bug other/61391] [5 Regression] ICE in execute_one_pass at -O3 and above

[ysrumyan at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

--- Comment #6 from Yuri Rumyantsev <ysrumyan at gmail dot com> ---
Arseny, I am not able to close this bug but you can do it.

[Bug other/61391] [5 Regression] ICE in execute_one_pass at -O3 and above

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

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

--- Comment #7 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Yuri Rumyantsev from comment #6)
> Arseny, I am not able to close this bug but you can do it.

You need to login with your gcc.gnu.org account to have more powers in
bugzilla.
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61319

--- Comment #18 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Author: manu
Revision: 211263
Modified property: svn:log

Modified: svn:log at Fri Nov  7 16:15:52 2014
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Fri Nov  7 16:15:52 2014
@@ -1,8 +1,10 @@
+2014-06-05  Yuri Rumyantsev  <ysrumyan@gmail.com>
+
 gcc/
-    PR tree-optimization/61319
+    PR tree-optimization/61391
     * tree-if-conv.c (is_cond_scalar_reduction): Add missed check that
     stmt belongs to loop.

 gcc/testsuite/
-    * gcc.dg/torture/pr61319.c: New test.
+    * gcc.dg/torture/pr61391.c: New test.
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Subject: [Bug other/61391] [5 Regression] ICE in execute_one_pass at -O3 and above
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

--- Comment #8 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Author: manu
Revision: 211263
Modified property: svn:log

Modified: svn:log at Fri Nov  7 16:15:52 2014
------------------------------------------------------------------------------
--- svn:log (original)
+++ svn:log Fri Nov  7 16:15:52 2014
@@ -1,8 +1,10 @@
+2014-06-05  Yuri Rumyantsev  <ysrumyan@gmail.com>
+
 gcc/
-    PR tree-optimization/61319
+    PR tree-optimization/61391
     * tree-if-conv.c (is_cond_scalar_reduction): Add missed check that
     stmt belongs to loop.

 gcc/testsuite/
-    * gcc.dg/torture/pr61319.c: New test.
+    * gcc.dg/torture/pr61391.c: New test.
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--- Comment #1 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Fri Nov  7 16:21:15 2014
New Revision: 217229

URL: https://gcc.gnu.org/viewcvs?rev!7229&root=gcc&view=rev
Log:
    PR c++/63366
    * decl.c (grokdeclarator): Fix __complex meaning __complex double.

Added:
    trunk/gcc/testsuite/g++.dg/torture/pr63366.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c

[Bug other/61391] [5 Regression] ICE in execute_one_pass at -O3 and above

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

--- Comment #9 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Yuri Rumyantsev from comment #4)
> It turned out that wrong PR number was used in ChangeLog. In fact this bug
> was fixed:

You can also edit the svn:log with:

svn propedit 'svn:log' --revprop -r 211263 svn+ssh://gcc.gnu.org/svn/gcc/trunk

Unfortunately, it seems ViewVC does not update the logs.
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--- Comment #5 from Thomas Bernard <thomas at famillebernardgouriou dot fr> ---
I think I found the root of the problem. I'm preparing a patch.

[Bug other/61391] [5 Regression] ICE in execute_one_pass at -O3 and above

[asolokha at gmx dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61391

Arseny Solokha <asolokha at gmx dot com> changed:

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

--- Comment #10 from Arseny Solokha <asolokha at gmx dot com> ---
Closing, then.