[Bug middle-end/67821] New: [gcc 5 regression] ICE in duplicate_ssa_name_range_info

[Bug middle-end/67821] New: [gcc 5 regression] ICE in duplicate_ssa_name_range_info

[sss@li-snyder.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

            Bug ID: 67821
           Summary: [gcc 5 regression] ICE in
                    duplicate_ssa_name_range_info
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: sss@li-snyder.org
  Target Milestone: ---

Created attachment 36438
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36438&action=edit
test case

hi -

I'm testing gcc from the gcc-5-branch svn branch.
Using the version as of 2 oct 2015 (svn rev 228385), i get an ICE compiling
the attached if -O2 is used.  (Reduced from core/clib/src/Demangle.c
in root 6.02.08, which appears itself to have been copied from libiberty.)

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/gcc/libexec/gcc/x86_64-unknown-linux-gnu/5.2.1/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/sss/gcc/gcc/configure --prefix=/usr/local/gcc
--enable-threads=posix --enable-long-long --enable-languages=c,c++,fortran
Thread model: posix
gcc version 5.2.1 20151002 (GCC) 
$ gcc -c -O2 x.c
x.c: In function ‘demangle_qualified’:
x.c:6:9: warning: implicit declaration of function ‘isdigit’
[-Wimplicit-function-declaration]
    if (!isdigit (*p))
         ^
x.c:1:5: internal compiler error: in duplicate_ssa_name_range_info, at
tree-ssanames.c:506
 int demangle_qualified (const char* mangled)
     ^
0xb29f14 duplicate_ssa_name_range_info(tree_node*, value_range_type,
range_info_def*)
        /home/sss/gcc/gcc/gcc/tree-ssanames.c:506
0xacdff3 eliminate_dom_walker::before_dom_children(basic_block_def*)
        /home/sss/gcc/gcc/gcc/tree-ssa-pre.c:4151
0xe9d5e1 dom_walker::walk(basic_block_def*)
        /home/sss/gcc/gcc/gcc/domwalk.c:188
0xacc23b eliminate
        /home/sss/gcc/gcc/gcc/tree-ssa-pre.c:4540
0xad405e execute
        /home/sss/gcc/gcc/gcc/tree-ssa-pre.c:4894
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.
$ 


tree-ssanames.c:506 is this line:

  gcc_assert (!SSA_NAME_ANTI_RANGE_P (name));

The last update i did from gcc-5-branch was about a month ago,
and i did not see this crash with that version.

thanks,
sss
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To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/67818] [5 Regression] FAIL: libgomp.fortran/alloc-comp-[23].f90
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg818

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
Program received signal SIGSEGV: Segmentation fault - invalid memory reference.

Backtrace for this error:
#0  0xF769EB7E
#1  0xF769DC7E
#2  0xF7798BDF
#3  0x8053299 in foo.3532._omp_fn.2 at alloc-comp-2.f90:?
#4  0xF760186E
#5  0xF75DD34F
#6  0xF7502A4D
#7  0xFFFFFFFF
FAIL: libgomp.fortran/alloc-comp-2.f90   -O0  execution test

[Bug middle-end/67821] [gcc 5 regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-10-02
                 CC|                            |mpolacek at gcc dot gnu.org
   Target Milestone|---                         |5.3
     Ever confirmed|0                           |1

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r228341.

[Bug middle-end/67821] [5/6 Regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot gnu.org
            Summary|[gcc 5 regression] ICE in   |[5/6 Regression] ICE in
                   |duplicate_ssa_name_range_in |duplicate_ssa_name_range_in
                   |fo                          |fo

--- Comment #2 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
...so mine.

[Bug middle-end/67821] [5/6 Regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |su at cs dot ucdavis.edu

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
*** Bug 67827 has been marked as a duplicate of this bug. ***

[Bug middle-end/67821] [5/6 Regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

--- Comment #4 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I think this should be just

diff --git a/gcc/tree-ssanames.c b/gcc/tree-ssanames.c
index 64e2379..c3484fe 100644
--- a/gcc/tree-ssanames.c
+++ b/gcc/tree-ssanames.c
@@ -561,7 +561,10 @@ reset_flow_sensitive_info (tree name)
    mark_ptr_info_alignment_unknown (SSA_NAME_PTR_INFO (name));
     }
   else
-    SSA_NAME_RANGE_INFO (name) = NULL;
+    {
+      SSA_NAME_RANGE_INFO (name) = NULL;
+      SSA_NAME_ANTI_RANGE_P (name) = 0;
+    }
 }

 /* Clear all flow sensitive data from all statements and PHI definitions

[Bug middle-end/67821] [5/6 Regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Oct  5 15:28:06 2015
New Revision: 228490

URL: https://gcc.gnu.org/viewcvs?rev=228490&root=gcc&view=rev
Log:
        PR tree-optimization/67821
        * tree-ssanames.c (duplicate_ssa_name_range_info): Remove an assert.

        * gcc.dg/torture/pr67821-2.c: New test.
        * gcc.dg/torture/pr67821.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr67821-2.c
    trunk/gcc/testsuite/gcc.dg/torture/pr67821.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssanames.c

[Bug middle-end/67821] [5 Regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Mon Oct  5 18:39:16 2015
New Revision: 228499

URL: https://gcc.gnu.org/viewcvs?rev=228499&root=gcc&view=rev
Log:
        PR tree-optimization/67821
        * tree-ssanames.c (duplicate_ssa_name_range_info): Remove an assert.

        * gcc.dg/torture/pr67821-2.c: New test.
        * gcc.dg/torture/pr67821.c: New test.

Added:
    branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr67821-2.c
    branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr67821.c
Modified:
    branches/gcc-5-branch/gcc/ChangeLog
    branches/gcc-5-branch/gcc/testsuite/ChangeLog
    branches/gcc-5-branch/gcc/tree-ssanames.c

[Bug middle-end/67821] [5 Regression] ICE in duplicate_ssa_name_range_info

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67821

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

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

--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.