[Bug target/71655] New: GCC trunk ICE on westmere target

["anton.mitrokhin at phystech dot edu" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71655

            Bug ID: 71655
           Summary: GCC trunk ICE on westmere target
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: anton.mitrokhin at phystech dot edu
  Target Milestone: ---

Created attachment 38766
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38766&action=edit
Reproducer

Reproducer:
> g++ -std=c++11 -Ofast -march=westmere -o out -c crash.cpp


Output:
crash.cpp: In function 'void fn1()':
crash.cpp:11:6: internal compiler error: in vect_get_vec_def_for_stmt_copy, at
tree-vect-stmts.c:1527
 void fn1() {
      ^~~
0xf302ef vect_get_vec_def_for_stmt_copy(vect_def_type, tree_node*)
        /export/users/gnutester/stability/svn/trunk/gcc/tree-vect-stmts.c:1527
0xf3ee02 vectorizable_comparison
        /export/users/gnutester/stability/svn/trunk/gcc/tree-vect-stmts.c:7938
0xf4ceab vect_transform_stmt(gimple*, gimple_stmt_iterator*, bool*, _slp_tree*,
_slp_instance*)
        /export/users/gnutester/stability/svn/trunk/gcc/tree-vect-stmts.c:8337
0xf53db5 vect_transform_loop(_loop_vec_info*)
        /export/users/gnutester/stability/svn/trunk/gcc/tree-vect-loop.c:6893
0xf70cfe vectorize_loops()
        /export/users/gnutester/stability/svn/trunk/gcc/tree-vectorizer.c:554
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.




> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/export/users/amitrokh/gcc_trunk/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /export/users/gnutester/stability/svn/trunk/configure
--with-arch=corei7 --with-cpu=corei7 --enable-clocale=gnu --with-system-zlib
--enable-shared --with-demangler-in-ld --enable-cloog-backend=isl
--with-fh-pkgversion=Revision=237716/svn-rev:237719/
--prefix=/export/users/gnutester/stability/work/trunk/64/install
--enable-languages=c,c++,fortran,java,lto
Thread model: posix
gcc version 7.0.0 20160622 (experimental) (Revision=237716/svn-rev:237719/)