[Bug tree-optimization/64563] New: ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[Bug tree-optimization/64563] New: ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[su at cs dot ucdavis.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

            Bug ID: 64563
           Summary: ICE with "-Wall -Wextra" at -Os and above on
                    x86_64-linux-gnu
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: su at cs dot ucdavis.edu

The following code causes an ICE when compiled using the current gcc trunk with
"-Wall -Wextra" at -Os and above on x86_64-linux-gnu in both 32-bit and 64-bit
modes. 

It is a regression from 4.9.x.

$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/usr/local/gcc-trunk/libexec/gcc/x86_64-unknown-linux-gnu/5.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-trunk/configure --prefix=/usr/local/gcc-trunk
--enable-languages=c,c++ --disable-werror --enable-multilib
Thread model: posix
gcc version 5.0.0 20150111 (experimental) [trunk revision 219429] (GCC) 

$ 
$ gcc-trunk -Os -c small.c
$ gcc-4.9 -Wall -Wextra -Os -c small.c
small.c: In function ‘fn1’:
small.c:7:14: warning: comparison between signed and unsigned integer
expressions [-Wsign-compare]
   d = b = (a != (e | 4294967288UL));
              ^
$ 
$ gcc-trunk -Wall -Wextra -Os -c small.c
small.c: In function ‘fn1’:
small.c:7:14: warning: comparison between signed and unsigned integer
expressions [-Wsign-compare]
   d = b = (a != (e | 4294967288UL));
              ^
small.c:5:1: internal compiler error: Segmentation fault
 fn1 ()
 ^
0xa9896f crash_signal
    ../../gcc-trunk/gcc/toplev.c:372
0xce9a44 contains_struct_check(tree_node const*, tree_node_structure_enum, char
const*, int, char const*)
    ../../gcc-trunk/gcc/tree.h:3128
0xce9a44 vrp_val_is_min
    ../../gcc-trunk/gcc/tree-vrp.c:241
0xcf0094 vrp_evaluate_conditional
    ../../gcc-trunk/gcc/tree-vrp.c:7550
0xd06454 fold_predicate_in
    ../../gcc-trunk/gcc/tree-vrp.c:9958
0xd06454 vrp_fold_stmt
    ../../gcc-trunk/gcc/tree-vrp.c:10001
0xc2c3d3 substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
    ../../gcc-trunk/gcc/tree-ssa-propagate.c:1148
0x10ad7e7 dom_walker::walk(basic_block_def*)
    ../../gcc-trunk/gcc/domwalk.c:188
0xc2bcf0 substitute_and_fold(tree_node* (*)(tree_node*), bool
(*)(gimple_stmt_iterator*), bool)
    ../../gcc-trunk/gcc/tree-ssa-propagate.c:1236
0xd033f4 vrp_finalize
    ../../gcc-trunk/gcc/tree-vrp.c:10189
0xd033f4 execute_vrp
    ../../gcc-trunk/gcc/tree-vrp.c:10305
0xd033f4 execute
    ../../gcc-trunk/gcc/tree-vrp.c:10384
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
$ 


--------------------------------


int a, b, c, d, f;
unsigned int e;

void
fn1 ()
{
  d = b = (a != (e | 4294967288UL));
  if (!d)
    c = f || b;
}
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Subject: [Bug ipa/63470] [5 Regression] internal compiler error: in estimate_edge_growth, at ipa-inline.h:308
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc470

--- Comment #8 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
Possibly fixed by (?) :

https://gcc.gnu.org/ml/gcc-patches/2015-01/msg00640.html

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-01-12
                 CC|                            |mpolacek at gcc dot gnu.org
   Target Milestone|---                         |5.0
            Summary|ICE with "-Wall -Wextra" at |[5 Regression] ICE with
                   |-Os and above on            |"-Wall -Wextra" at -Os and
                   |x86_64-linux-gnu            |above on x86_64-linux-gnu
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Confirmed.  Bisection in progress.

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r217638, it seems.

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

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

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

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ppalka at gcc dot gnu.org,
                   |                            |trippels at gcc dot gnu.org

--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
==7793== Invalid read of size 2
==7793==    at 0xCD3BC4: contains_struct_check (tree.h:3137)
==7793==    by 0xCD3BC4: vrp_val_is_min(tree_node const*) (tree-vrp.c:235)
==7793==    by 0xCDB8CA: vrp_evaluate_conditional(tree_code, tree_node*,
tree_node*, gimple_statement_base*) (tree-vrp.c:7544)
==7793==    by 0xCF1116: fold_predicate_in (tree-vrp.c:9952)
==7793==    by 0xCF1116: vrp_fold_stmt(gimple_stmt_iterator*) (tree-vrp.c:9995)
==7793==    by 0xC1EB43:
substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
(tree-ssa-propagate.c:1142)
==7793==    by 0x104D767: dom_walker::walk(basic_block_def*) (domwalk.c:188)
==7793==    by 0xC1E450: substitute_and_fold(tree_node* (*)(tree_node*), bool
(*)(gimple_stmt_iterator*), bool) (tree-ssa-propagate.c:1230)
==7793==    by 0xCEDB8F: vrp_finalize (tree-vrp.c:10183)
==7793==    by 0xCEDB8F: execute_vrp (tree-vrp.c:10299)
==7793==    by 0xCEDB8F: (anonymous namespace)::pass_vrp::execute(function*)
(tree-vrp.c:10378)
==7793==    by 0x9E70E2: execute_one_pass(opt_pass*) (passes.c:2311)
==7793==    by 0x9E7545: execute_pass_list_1(opt_pass*) (passes.c:2363)
==7793==    by 0x9E7557: execute_pass_list_1(opt_pass*) (passes.c:2364)
==7793==    by 0x9E7598: execute_pass_list(function*, opt_pass*)
(passes.c:2374)
==7793==    by 0x700CDB: cgraph_node::expand() (cgraphunit.c:1797)
==7793==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==7793== 
small.c:5

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The != VR_VARYING is obviously bogus.  Need to find out if what
Diego meant to write was == VR_RANGE or == VR_RANGE || == VR_ANTI_RANGE.
VR_UNDEFINED certainly doesn't have vr0->min/vr0->max set.

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Mon Jan 12 20:48:09 2015
New Revision: 219493

URL: https://gcc.gnu.org/viewcvs?rev=219493&root=gcc&view=rev
Log:
    PR tree-optimization/64563
    * tree-vrp.c (vrp_evaluate_conditional): Check for VR_RANGE
    instead of != VR_VARYING.

    * gcc.dg/pr64563.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr64563.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

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

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jan 14 20:21:49 2015
New Revision: 219612

URL: https://gcc.gnu.org/viewcvs?rev=219612&root=gcc&view=rev
Log:
    Backported from mainline
    2015-01-12  Jakub Jelinek  <jakub@redhat.com>

    PR tree-optimization/64563
    * tree-vrp.c (vrp_evaluate_conditional): Check for VR_RANGE
    instead of != VR_VARYING.

    * gcc.dg/pr64563.c: New test.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr64563.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-vrp.c

[Bug tree-optimization/64563] [5 Regression] ICE with "-Wall -Wextra" at -Os and above on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64563

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Feb  1 21:50:53 2015
New Revision: 220332

URL: https://gcc.gnu.org/viewcvs?rev=220332&root=gcc&view=rev
Log:
    Backported from mainline
    2015-01-12  Jakub Jelinek  <jakub@redhat.com>

    PR tree-optimization/64563
    * tree-vrp.c (vrp_evaluate_conditional): Check for VR_RANGE
    instead of != VR_VARYING.

    * gcc.dg/pr64563.c: New test.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/pr64563.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-vrp.c