[Bug debug/51262] New: [4.7 Regression] ICE: SIGSEGV in primary_template_instantiation_p (pt.c:2874) with -flto -g

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51262

             Bug #: 51262
           Summary: [4.7 Regression] ICE: SIGSEGV in
                    primary_template_instantiation_p (pt.c:2874) with
                    -flto -g
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25875
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25875
reduced testcase

Compiler output:
$ gcc -flto -fcompare-debug testcase.C
==20321== Invalid read of size 2
==20321==    at 0x5C0904: primary_template_instantiation_p(tree_node const*)
(pt.c:2874)
==20321==    by 0x5C118D: get_primary_template_innermost_parameters(tree_node
const*) (pt.c:2902)
==20321==    by 0x899E19: gen_tagged_type_die(tree_node*, die_struct*,
debug_info_usage) (dwarf2out.c:20045)
==20321==    by 0x886C5F: gen_type_die_with_usage(tree_node*, die_struct*,
debug_info_usage) (dwarf2out.c:18952)
==20321==    by 0x89C8A6: gen_decl_die(tree_node*, tree_node*, die_struct*)
(dwarf2out.c:19512)
==20321==    by 0x8A1C2F: decls_for_scope(tree_node*, die_struct*, int)
(dwarf2out.c:19125)
==20321==    by 0x8A2043: gen_block_die(tree_node*, die_struct*, int)
(dwarf2out.c:18111)
==20321==    by 0x8A1CD5: decls_for_scope(tree_node*, die_struct*, int)
(dwarf2out.c:19139)
==20321==    by 0x89DB1E: gen_subprogram_die(tree_node*, die_struct*)
(dwarf2out.c:17555)
==20321==    by 0x89C214: gen_decl_die(tree_node*, tree_node*, die_struct*)
(dwarf2out.c:19489)
==20321==    by 0x8A5818: dwarf2out_function_decl(tree_node*)
(dwarf2out.c:19871)
==20321==    by 0x8FEF14: rest_of_handle_final() (final.c:4349)
==20321==    by 0xA6ED94: execute_one_pass(opt_pass*) (passes.c:2074)
==20321==    by 0xA6F134: execute_pass_list(opt_pass*) (passes.c:2129)
==20321==    by 0xA6F146: execute_pass_list(opt_pass*) (passes.c:2130)
==20321==    by 0xA6F146: execute_pass_list(opt_pass*) (passes.c:2130)
==20321==    by 0xBD0CED: tree_rest_of_compilation(tree_node*)
(tree-optimize.c:420)
==20321==    by 0x8249C9: cgraph_expand_function(cgraph_node*)
(cgraphunit.c:1819)
==20321==    by 0x826B05: cgraph_optimize() (cgraphunit.c:1984)
==20321==    by 0x826ED9: cgraph_finalize_compilation_unit()
(cgraphunit.c:1327)
==20321==    by 0x64880A: cp_write_global_declarations() (decl2.c:4050)
==20321==    by 0xB64033: toplev_main(int, char**) (toplev.c:581)
==20321==    by 0x674ED2C: (below main) (in /lib64/libc-2.12.2.so)
==20321==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==20321== 
testcase.C: In function 'bar<void>(int*)void*':
testcase.C:11:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
gcc: error: during -fcompare-debug recompilation
gcc: error: testcase.C: -fcompare-debug failure (length)

Tested revisions:
r181550 - crash
r181532 - crash
r181508 - crash
r181442 - OK