[Bug ipa/70348] New: [openacc] ICE in visit_ref_for_mod_analysis, at ipa-prop.c

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70348

            Bug ID: 70348
           Summary: [openacc] ICE in visit_ref_for_mod_analysis, at
                    ipa-prop.c
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ipa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

Created attachment 38052
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38052&action=edit
test-case

The testcase ICEs when compiled for openacc:
...
$ gcc -O2 -fopenacc test.c -S
error.c: In function ‘foo._omp_fn.0’:
error.c:33:1: internal compiler error: in visit_ref_for_mod_analysis, at
ipa-prop.c:2148
 }
 ^
0xc03686 visit_ref_for_mod_analysis
        src/gcc/ipa-prop.c:2148
0xb2b323 walk_stmt_load_store_addr_ops(gimple*, void*, bool (*)(gimple*,
tree_node*, tree_node*, void*), bool (*)(gimple*, tree_node*, tree_node*,
void*), bool (*)(gimple*, tree_node*, tree_node*, void*))
        src/gcc/gimple-walk.c:770
0xc03759 ipa_analyze_params_uses_in_bb
        src/gcc/ipa-prop.c:2175
0xc03a2e analysis_dom_walker::before_dom_children(basic_block_def*)
        src/gcc/ipa-prop.c:2255
0x1cb5f46 dom_walker::walk(basic_block_def*)
        src/gcc/domwalk.c:265
0xc03d27 ipa_analyze_node(cgraph_node*)
        src/gcc/ipa-prop.c:2326
0x1d45293 ipcp_generate_summary
        src/gcc/ipa-cp.c:4638
0xd936b0 execute_ipa_summary_passes(ipa_opt_pass_d*)
        src/gcc/passes.c:2162
0x913eef ipa_passes
        src/gcc/cgraphunit.c:2290
0x9142d1 symbol_table::compile()
        src/gcc/cgraphunit.c:2404
0x914675 symbol_table::finalize_compilation_unit()
        src/gcc/cgraphunit.c:2564
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.