https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64769

            Bug ID: 64769
           Summary: ICE: tree check: expected integer_cst, have parm_decl
                    in simd_clone_clauses_extract, at omp-low.c:12503 with
                    -fopenmp-simd
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz

Created attachment 34564
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34564&action=edit
reduced testcase

Crashes only when compiled as C++.
Identical C code doesn't crash (or when '-x c' is passed).

Compiler output:
$ gcc -fopenmp-simd testcase.C         
testcase.C:5:1: internal compiler error: tree check: expected integer_cst, have
parm_decl in simd_clone_clauses_extract, at omp-low.c:12503
 }
 ^
0x104e20c tree_check_failed(tree_node const*, char const*, int, char const*,
...)
        /mnt/svn/gcc-trunk/gcc/tree.c:9290
0x5b4284 tree_int_cst_elt_check(tree_node*, int, char const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/tree.h:3046
0xcdcd4e tree_int_cst_elt_check(tree_node*, int, char const*, int, char const*)
        /mnt/svn/gcc-trunk/gcc/tree.h:3049
0xcdcd4e simd_clone_clauses_extract
        /mnt/svn/gcc-trunk/gcc/omp-low.c:12503
0xcdcd4e expand_simd_clones
        /mnt/svn/gcc-trunk/gcc/omp-low.c:13488
0xcdcd4e ipa_omp_simd_clone
        /mnt/svn/gcc-trunk/gcc/omp-low.c:13579
0xcdcd4e execute
        /mnt/svn/gcc-trunk/gcc/omp-low.c:13607
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.

Tested revisions:
r219989 - ICE
4_9 r219040 - ICE
4_8 r219093 - unknown agrument "-fopenmp-simd"

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