http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53849
Bug #: 53849 Summary: [4.8 Regression] ICE: in add_referenced_var_1, at tree-dfa.c:567 with -O2 -ftree-parallelize-loops=2 -fno-tree-loop-im Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end AssignedTo: unassig...@gcc.gnu.org ReportedBy: zso...@seznam.cz Created attachment 27740 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27740 reduced testcase Compiler output: $ gcc -O2 -ftree-parallelize-loops=2 -fno-tree-loop-im testcase.c testcase.c: In function 'foo': testcase.c:8:11: internal compiler error: in add_referenced_var_1, at tree-dfa.c:567 while (--d) ^ Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. (gdb) bt #0 fancy_abort (file=0x122de40 "/mnt/svn/gcc-trunk/gcc/tree-dfa.c", line=567, function=0x122e0a0 "add_referenced_var_1") at /mnt/svn/gcc-trunk/gcc/diagnostic.c:1010 #1 0x0000000000a240c7 in add_referenced_var_1 (var=0x7ffff6cf11e0, fn=<optimized out>) at /mnt/svn/gcc-trunk/gcc/tree-dfa.c:565 #2 0x0000000000a083d2 in move_stmt_op (tp=0x7ffff6e22020, walk_subtrees=0x7fffffffccac, data=<optimized out>) at /mnt/svn/gcc-trunk/gcc/tree-cfg.c:6032 #3 0x0000000000be8b5c in walk_tree_1 (tp=0x7ffff6e22020, func=0xa08200 <move_stmt_op(tree*, int*, void*)>, data=0x7fffffffcf20, pset=0x0, lh=0) at /mnt/svn/gcc-trunk/gcc/tree.c:10572 #4 0x0000000000be92f9 in walk_tree_1 (tp=0x7ffff6e0c410, func=0xa08200 <move_stmt_op(tree*, int*, void*)>, data=0x7fffffffcf20, pset=0x0, lh=0) at /mnt/svn/gcc-trunk/gcc/tree.c:10828 #5 0x000000000081fc06 in walk_gimple_op (stmt=0x7ffff6e0c3c0, callback_op=0xa08200 <move_stmt_op(tree*, int*, void*)>, wi=0x7fffffffcf20) at /mnt/svn/gcc-trunk/gcc/gimple.c:1463 #6 0x000000000081ffed in walk_gimple_stmt (gsi=0x7fffffffcf00, callback_stmt=0xa0e730 <move_stmt_r(gimple_stmt_iterator*, bool*, walk_stmt_info*)>, callback_op=0xa08200 <move_stmt_op(tree*, int*, void*)>, wi=0x7fffffffcf20) at /mnt/svn/gcc-trunk/gcc/gimple.c:1757 #7 0x0000000000a18186 in move_block_to_fn (d=0x7fffffffcf60, update_edge_count_p=<optimized out>, after=<optimized out>, bb=<optimized out>, dest_cfun=0x7ffff6e300a0) at /mnt/svn/gcc-trunk/gcc/tree-cfg.c:6263 #8 move_sese_region_to_fn (dest_cfun=0x7ffff6e300a0, entry_bb=<optimized out>, exit_bb=<optimized out>, orig_block=<optimized out>) at /mnt/svn/gcc-trunk/gcc/tree-cfg.c:6551 #9 0x00000000008e4d4b in expand_omp_taskreg (region=0x18dbae0) at /mnt/svn/gcc-trunk/gcc/omp-low.c:3570 #10 0x00000000008e60c8 in expand_omp (region=0x18dbae0) at /mnt/svn/gcc-trunk/gcc/omp-low.c:5598 #11 0x00000000008ef311 in omp_expand_local (head=<optimized out>) at /mnt/svn/gcc-trunk/gcc/omp-low.c:5735 #12 0x0000000000a6f0a6 in gen_parallel_loop (n_threads=<optimized out>, reduction_list=<optimized out>, loop=0x0, niter=<optimized out>) at /mnt/svn/gcc-trunk/gcc/tree-parloops.c:1888 #13 parallelize_loops () at /mnt/svn/gcc-trunk/gcc/tree-parloops.c:2210 #14 0x0000000000afeb07 in tree_parallelize_loops () at /mnt/svn/gcc-trunk/gcc/tree-ssa-loop.c:545 #15 0x000000000090c7d5 in execute_one_pass (pass=0x1759040) at /mnt/svn/gcc-trunk/gcc/passes.c:2165 #16 0x000000000090cb95 in execute_pass_list (pass=0x1759040) at /mnt/svn/gcc-trunk/gcc/passes.c:2220 #17 0x000000000090cba7 in execute_pass_list (pass=0x1759580) at /mnt/svn/gcc-trunk/gcc/passes.c:2221 #18 0x000000000090cba7 in execute_pass_list (pass=0x1756ae0) at /mnt/svn/gcc-trunk/gcc/passes.c:2221 #19 0x00000000006b7f98 in expand_function (node=0x7ffff6cef750) at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1615 #20 0x00000000006b9d74 in expand_all_functions () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1720 #21 compile () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2018 #22 0x00000000006ba335 in finalize_compilation_unit () at /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2095 #23 0x000000000059bb10 in c_write_global_declarations () at /mnt/svn/gcc-trunk/gcc/c/c-decl.c:10116 #24 0x00000000009f6ff5 in compile_file () at /mnt/svn/gcc-trunk/gcc/toplev.c:564 #25 0x00000000009f8b98 in do_compile () at /mnt/svn/gcc-trunk/gcc/toplev.c:1867 #26 toplev_main (argc=16, argv=0x7fffffffd6b8) at /mnt/svn/gcc-trunk/gcc/toplev.c:1943 #27 0x00007ffff6f052ad in __libc_start_main () from /lib64/libc.so.6 #28 0x000000000057ef11 in _start () Tested revisions: r189246 - crash 4.7 r188682 - OK 4.6 r188682 - OK