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363 Commits

Author SHA1 Message Date
Sebastian Huber
994a4cc03d re PR target/56771 (Integer Overflow? Building arm-rtems libgcc2) 
2013-04-03  Sebastian Huber  <sebastian.huber@embedded-brains.de>

	PR target/56771
	* configure.ac: Require 64-bit int for arm*-*-rtems*.
	* configure: Regenerate.

From-SVN: r197417
 2013-04-03 15:11:54 +00:00
Jakub Jelinek
28937f1196 re PR middle-end/56461 (GCC is leaking lots of memory) 
PR middle-end/56461
	* internal.h (struct cpp_buffer): Add to_free field.
	(_cpp_pop_file_buffer): Add third argument.
	* files.c (_cpp_stack_file): Set buffer->to_free.
	(_cpp_pop_file_buffer): Add to_free argument.  Free to_free
	if non-NULL, and if equal to file->buffer_start, also clear
	file->buffer{,_start,_valid}.
	* directives.c (_cpp_pop_buffer): Pass buffer->to_free
	to _cpp_pop_file_buffer.

From-SVN: r196497
 2013-03-06 17:18:40 +01:00
Jakub Jelinek
3b8af25b7a re PR middle-end/56461 (GCC is leaking lots of memory) 
PR middle-end/56461
	* files.c (_cpp_save_file_entries): Free result at the end.
	* pch.c (cpp_string_free): New function.
	(cpp_save_state): Use it in htab_create call.
	(cpp_write_pch_deps): Free ss->defs.  Destroy ss->definedhash.

From-SVN: r196394
 2013-03-01 22:06:04 +01:00
Jakub Jelinek
15fd8332c0 files.c (_cpp_find_file): If returning early... 
* files.c (_cpp_find_file): If returning early, before storing
	something to *hash_slot and *hash_slot is NULL, call htab_clear_slot
	on it.  Access *hash_slot using void * type rather than
	struct file_hash_entry * to avoid aliasing issues.

From-SVN: r196356
 2013-02-28 20:57:56 +01:00
Jakub Jelinek
1a80db971d configure.ac: Don't define ENABLE_CHECKING whenever --enable-checking is seen... 
* configure.ac: Don't define ENABLE_CHECKING whenever
	--enable-checking is seen, instead use similar --enable-checking=yes
	vs. --enable-checking=release default as gcc/ subdir has and
	define ENABLE_CHECKING if ENABLE_CHECKING is defined in gcc/.
	Define ENABLE_VALGRIND_CHECKING if requested.
	* lex.c (new_buff): If ENABLE_VALGRIND_CHECKING, put _cpp_buff
	struct first in the allocated buffer and result->base after it.
	(_cpp_free_buff): If ENABLE_VALGRIND_CHECKING, free buff itself
	instead of buff->base.
	* config.in: Regenerated.
	* configure: Regenerated.

From-SVN: r196333
 2013-02-28 10:58:47 +01:00
Ed Smith-Rowland
561f7fc72c re PR c++/55582 ([C++11] Unable to define string user-defined literal without leading underscore.) 
gcc/libcpp/

2013-02-13  Ed Smith-Rowland  <3dw4rd@verizon.net>

	PR c++/55582
	* libcpp/lex.c (lex_raw_string): Allow string literal with suffix
	beginning with 's' to be parsed as a C++11 user-defined literal.


gcc/testsuite/

2013-02-13  Ed Smith-Rowland  <3dw4rd@verizon.net>

	PR c++/55582
	* g++.dg/cpp0x/udlit-string-literal.h: New.
	* g++.dg/cpp0x/udlit-string-literal.C: New.

From-SVN: r196041
 2013-02-14 02:55:42 +00:00
Richard Sandiford
500f3ed906 Update copyright years in libcpp. 
From-SVN: r195162
 2013-01-14 18:13:59 +00:00
Paolo Carlini
1582c67762 PR c++/54526 (again) 
/libcpp
2013-01-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54526 (again)
	* lex.c (_cpp_lex_direct): In C++11 mode, implement 2.5 p3, bullet 2.

/gcc/cp
2013-01-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54526 (again)
	* parser.c (cp_parser_template_id): Revert core of previous change
	(keep adjusted inform message).

/gcc/testsuite
2013-01-04  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/54526 (again)
	* g++.dg/cpp0x/parse2.C: Extend.
	* g++.old-deja/g++.other/crash28.C: Adjust.

From-SVN: r194909
 2013-01-04 15:30:24 +00:00
Marc Glisse
8ac16127cf re PR bootstrap/50167 (gmp memory functions are extern "C" (graphite)) 
2013-01-03  Marc Glisse  <marc.glisse@inria.fr>

	PR bootstrap/50167
gcc/
	* graphite-interchange.c (pdr_stride_in_loop): Use gmp_fprintf.
	* graphite-poly.c (debug_gmp_value): Likewise.

	PR bootstrap/50177
libcpp/
	* line-map.c (get_combined_adhoc_loc): Cast from extern "C" type.
	(new_linemap): Likewise.
	(linemap_enter_macro): Likewise.

From-SVN: r194868
 2013-01-03 20:06:49 +00:00
Jakub Jelinek
f41e5bd19d re PR bootstrap/55380 (All search_line_fast implementations read beyond buffer) 
PR bootstrap/55380
	PR other/54691
	* files.c (read_file_guts): Allocate extra 16 bytes instead of
	1 byte at the end of buf.  Pass size + 16 instead of size
	to _cpp_convert_input.
	* charset.c (_cpp_convert_input): Reallocate if there aren't
	at least 16 bytes beyond to.len in the buffer.  Clear 16 bytes
	at to.text + to.len.

From-SVN: r194102
 2012-12-03 18:19:47 +01:00
Steve Ellcey
3196203294 re PR pch/55399 (pch tests fail on mips-mti-linux-gnu target) 
2012-11-21  Steve Ellcey  <sellcey@mips.com>

	PR pch/55399
	* files.c (pch_open_file): Fix check for implicit_preinclude.

From-SVN: r193709
 2012-11-21 21:28:30 +00:00
Simon Baldwin
5dc99c4678 cpplib.h (struct cpp_options): Add canonical_system_headers. 
* include/cpplib.h (struct cpp_options): Add canonical_system_headers.
    * files.c (find_file_in_dir): Call maybe_shorter_path() only if
    canonical_system_headers is set.
    * init.c (cpp_create_reader): Initialize canonical_system_headers.
    * configure.ac: Add new --enable-canonical-system-headers.
    * configure: Regenerate.
    * config.in: Regenerate.

    * doc/cppopts.texi: Document -f[no-]canonical-system-headers.
    * doc/install.texi: Document --enable-canonical-system-headers.

    * c.opt: Add f[no-]canonical-system-headers.
    * c-opts.c (c_common_handle_option): Handle
    OPT_fcanonical_system_headers.

From-SVN: r193569
 2012-11-16 17:14:05 +00:00
Ed Smith-Rowland
a4a0016d60 Implement a flag -fext-numeric-literals that allows control of whether GNU... 
Implement a flag -fext-numeric-literals that allows control of whether GNU
numeric suffix extensions are parsed or passed to C++ as user-defined literals.

From-SVN: r193382
 2012-11-10 00:08:49 +00:00
Ian Bolton
04ce690f70 AArch64 [7/10] 
2012-10-23  Ian Bolton  <ian.bolton@arm.com>
	    Jim MacArthur  <jim.macarthur@arm.com>
	    Marcus Shawcroft  <marcus.shawcroft@arm.com>
	    Nigel Stephens  <nigel.stephens@arm.com>
	    Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
	    Richard Earnshaw  <rearnsha@arm.com>
	    Sofiane Naci  <sofiane.naci@arm.com>
	    Stephen Thomas  <stephen.thomas@arm.com>
	    Tejas Belagod  <tejas.belagod@arm.com>
	    Yufeng Zhang  <yufeng.zhang@arm.com>

	* configure.ac: Enable AArch64.
	* configure: Regenerate.


Co-Authored-By: Jim MacArthur <jim.macarthur@arm.com>
Co-Authored-By: Marcus Shawcroft <marcus.shawcroft@arm.com>
Co-Authored-By: Nigel Stephens <nigel.stephens@arm.com>
Co-Authored-By: Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>
Co-Authored-By: Richard Earnshaw <rearnsha@arm.com>
Co-Authored-By: Sofiane Naci <sofiane.naci@arm.com>
Co-Authored-By: Stephen Thomas <stephen.thomas@arm.com>
Co-Authored-By: Tejas Belagod <tejas.belagod@arm.com>
Co-Authored-By: Yufeng Zhang <yufeng.zhang@arm.com>

From-SVN: r192728
 2012-10-23 17:24:58 +00:00
Joseph Myers
1efcb8c6f6 gcc: 
* config.gcc (*-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu |
	*-*-knetbsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu): Use
	glibc-c.o in c_target_objs and cxx_target_objs.  Use t-glibc in
	tmake_file.  Set target_has_targetcm.
	(tilegx-*-linux*, tilepro-*-linux*): Append to c_target_objs and
	cxx_target_objs rather than overriding previous value.
	* config/glibc-c.c, config/t-glibc: New.
	* doc/tm.texi.in (TARGET_C_PREINCLUDE): New @hook.
	* doc/tm.texi: Regenerate.
	* hooks.c (hook_constcharptr_void_null): New.
	* hooks.h (hook_constcharptr_void_null): Declare.

gcc/c-family:
	* c-common.h (pch_cpp_save_state): Declare.
	* c-target.def (c_preinclude): New hook.
	* c-opts.c (done_preinclude): New.
	(push_command_line_include): Handle default preincluded header.
	(cb_file_change): Call pch_cpp_save_state when calling
	push_command_line_include.
	* c-pch.c (pch_ready_to_save_cpp_state, pch_cpp_state_saved)
	(pch_cpp_save_state): New.
	(pch_init): Call pch_cpp_save_state conditionally, instead of
	calling cpp_save_state.

gcc/testsuite:
	* gcc.dg/c99-predef-1.c: New test.
	* gcc.dg/cpp/cmdlne-dU-1.c, gcc.dg/cpp/cmdlne-dU-2.c,
	gcc.dg/cpp/cmdlne-dU-3.c, gcc.dg/cpp/cmdlne-dU-4.c,
	gcc.dg/cpp/cmdlne-dU-5.c, gcc.dg/cpp/cmdlne-dU-6.c,
	gcc.dg/cpp/cmdlne-dU-7.c, gcc.dg/cpp/cmdlne-dU-8.c,
	gcc.dg/cpp/cmdlne-dU-9.c, gcc.dg/cpp/cmdlne-dU-10.c,
	gcc.dg/cpp/cmdlne-dU-11.c, gcc.dg/cpp/cmdlne-dU-12.c,
	gcc.dg/cpp/cmdlne-dU-13.c, gcc.dg/cpp/cmdlne-dU-14.c,
	gcc.dg/cpp/cmdlne-dU-15.c, gcc.dg/cpp/cmdlne-dU-16.c,
	gcc.dg/cpp/cmdlne-dU-17.c, gcc.dg/cpp/cmdlne-dU-18.c,
	gcc.dg/cpp/cmdlne-dU-19.c, gcc.dg/cpp/cmdlne-dU-20.c,
	gcc.dg/cpp/cmdlne-dU-21.c, gcc.dg/cpp/cmdlne-dU-22.c,
	gcc.dg/cpp/mi5.c, gcc.dg/cpp/multiline.c: Add -nostdinc to
	dg-options.

libcpp:
	* files.c (struct _cpp_file): Add implicit_preinclude.
	(pch_open_file): Allow a previously opened implicitly included
	file.
	(_cpp_find_file): Add implicit_preinclude argument.  Free file and
	do not call open_file_failed if implicit_preinclude.  Store
	implicit_preinclude value.
	(_cpp_stack_include, _cpp_fake_include, _cpp_compare_file_date):
	Update calls to _cpp_find_file.
	(_cpp_stack_include): Handle IT_DEFAULT.
	(cpp_push_default_include): New.
	* include/cpplib.h (cpp_push_default_include): Declare.
	* init.c (cpp_read_main_file): Update call to _cpp_find_file.
	* internal.h (enum include_type): Add IT_DEFAULT.
	(_cpp_find_file): Update prototype.

From-SVN: r192715
 2012-10-23 15:55:55 +01:00
Tobias Burnus
55e7f90769 files.c (read_file_guts, [...]): Free memory before returning. 
2012-10-15  Tobias Burnus  <burnus@net-b.de>

        * files.c (read_file_guts, _cpp_save_file_entries): Free memory
        before returning.
        * lex.c (warn_about_normalization): Ditto.
        * mkdeps.c (deps_save): Ditto.
        * pch.c (cpp_valid_state): Ditto.

From-SVN: r192474
 2012-10-15 22:08:57 +02:00
Florian Weimer
f591bd8f50 Implement #pragma GCC warning/error 
2012-10-04  Florian Weimer  <fweimer@redhat.com>

	* doc/cpp.texi (Pragmas): Document #pragma GCC warning, #pragma
	GCC error.

2012-10-04  Florian Weimer  <fweimer@redhat.com>

	* c-c++-common/cpp/diagnostic-pragma-1.c: New testcase.

2012-10-04  Florian Weimer  <fweimer@redhat.com>

	* directives.c (do_pragma_warning_or_error): New.
	(do_pragma_warning): New.
	(do_pragma_error): New.
	(_cpp_init_internal_pragmas): Register new pragmas.

From-SVN: r192084
 2012-10-04 17:33:11 +02:00
Dehao Chen
ec6e039992 re PR middle-end/54704 (three-fold increase in compile-time between r191483 and r191569) 
libcpp:
	2012-09-25  Dehao Chen  <dehao@google.com>

	PR middle-end/54704
	* line-map.c (location_adhoc_data_hash): Fix the hash function.

From-SVN: r191747
 2012-09-25 21:32:29 +00:00
Dehao Chen
5218700874 re PR middle-end/54645 (Many testsuite failures) 
gcc:
	2012-09-25  Dehao Chen  <dehao@google.com>

	PR middle-end/54645
	* c-family/c-pch.c (c_common_read_pch): Rebuild the location_adhoc_data
	map when read in the pch.

libcpp:
	2012-09-25  Dehao Chen  <dehao@google.com>

	PR middle-end/54645
	* include/line-map.h (location_adhoc_data): Move location_adhoc_data
	into GC.
	(location_adhoc_data_map): Likewise.
	(line_maps): Likewise.
	(rebuild_location_adhoc_htab): New Function.
	* line-map.c (+rebuild_location_adhoc_htab): new Funcion.
	(get_combined_adhoc_loc): Move location_adhoc_data into GC.
	(location_adhoc_data_fini): Likewise.
	(linemap_init): Likewise.
	(location_adhoc_data_init): Remove Function.

From-SVN: r191706
 2012-09-25 13:19:33 +00:00
Dehao Chen
5368224f42 Integrate lexical block into source_location. 
gcc:
	2012-09-19  Dehao Chen  <dehao@google.com>

	* toplev.c (general_init): Init block_locations.
	* tree.c (tree_set_block): New.
	(tree_block): Change to use LOCATION_BLOCK.
	* tree.h (TREE_SET_BLOCK): New.
	* final.c (reemit_insn_block_notes): Change to use LOCATION_BLOCK.
	(final_start_function): Likewise.
	* input.c (expand_location_1): Likewise.
	* input.h (LOCATION_LOCUS): New.
	(LOCATION_BLOCK): New.
	(IS_UNKNOWN_LOCATION): New.
	* fold-const.c (expr_location_or): Change to use new location.
	* reorg.c (emit_delay_sequence): Likewise.
	(try_merge_delay_insns): Likewise.
	* modulo-sched.c (dump_insn_location): Likewise.
	* lto-streamer-out.c (lto_output_location_bitpack): Likewise.
	* lto-cgraph.c (output_node_opt_summary): Likewise.
	* jump.c (rtx_renumbered_equal_p): Likewise.
	* ifcvt.c (noce_try_move): Likewise.
	(noce_try_store_flag): Likewise.
	(noce_try_store_flag_constants): Likewise.
	(noce_try_addcc): Likewise.
	(noce_try_store_flag_mask): Likewise.
	(noce_try_cmove): Likewise.
	(noce_try_cmove_arith): Likewise.
	(noce_try_minmax): Likewise.
	(noce_try_abs): Likewise.
	(noce_try_sign_mask): Likewise.
	(noce_try_bitop): Likewise.
	(noce_process_if_block): Likewise.
	(cond_move_process_if_block): Likewise.
	(find_cond_trap): Likewise.
	* ipa-prop.c (ipa_set_jf_constant): Likewise.
	(ipa_write_jump_function): Likewise.
	* dwarf2out.c (add_src_coords_attributes): Likewise.
	* expr.c (expand_expr_real): Likewise.
	* tree-parloops.c (create_loop_fn): Likewise.
	* recog.c (peep2_attempt): Likewise.
	* function.c (free_after_compilation): Likewise.
	(expand_function_end): Likewise.
	(set_insn_locations): Likewise.
	(thread_prologue_and_epilogue_insns): Likewise.
	* print-rtl.c (print_rtx): Likewise.
	* profile.c (branch_prob): Likewise.
	* trans-mem.c (ipa_tm_scan_irr_block): Likewise.
	* gimplify.c (gimplify_call_expr): Likewise.
	* except.c (duplicate_eh_regions_1): Likewise.
	* emit-rtl.c (try_split): Likewise.
	(make_insn_raw): Likewise.
	(make_debug_insn_raw): Likewise.
	(make_jump_insn_raw): Likewise.
	(make_call_insn_raw): Likewise.
	(emit_pattern_after_setloc): Likewise.
	(emit_pattern_after): Likewise.
	(emit_debug_insn_after): Likewise.
	(emit_pattern_before): Likewise.
	(emit_insn_before_setloc): Likewise.
	(emit_jump_insn_before): Likewise.
	(emit_call_insn_before_setloc): Likewise.
	(emit_call_insn_before): Likeise.
	(emit_debug_insn_before_setloc): Likewise.
	(emit_copy_of_insn_after): Likewise.
	(insn_locators_alloc): Remove.
	(insn_locators_finalize): Remove.
	(insn_locators_free): Remove.
	(set_curr_insn_source_location): Remove.
	(get_curr_insn_source_location): Remove.
	(set_curr_insn_block): Remove.
	(get_curr_insn_block): Remove.
	(locator_scope): Remove.
	(insn_scope): Change to use new location.
	(locator_location): Remove.
	(insn_line): Change to use new location.
	(locator_file): Remove.
	(insn_file): Change to use new location.
	(locator_eq): Remove.
	(insn_locations_init): New.
	(insn_locations_finalize): New.
	(set_curr_insn_location): New.
	(curr_insn_location): New.
	* cfgexpand.c (gimple_assign_rhs_to_tree): Change to use new location.
	(expand_gimple_cond): Likewise.
	(expand_call_stmt): Likewise.
	(expand_gimple_stmt_1): Likewise.
	(expand_gimple_basic_block): Likewise.
	(construct_exit_block): Likewise.
	(gimple_expand_cfg): Likewise.
	* cfgcleanup.c (try_forward_edges): Likewise.
	* tree-ssa-live.c (remove_unused_scope_block_p): Likewise.
	(dump_scope_block): Likewise.
	(remove_unused_locals): Likewise.
	* rtl.c (rtx_equal_p_cb): Likewise.
	(rtx_equal_p): Likewise.
	* rtl.h (XUINT): New.
	(INSN_LOCATOR): Remove.
	(CURR_INSN_LOCATION): Remove.
	(INSN_LOCATION): New.
	(INSN_HAS_LOCATION): New.
	* tree-inline.c (remap_gimple_op_r): Change to use new location.
	(copy_tree_body_r): Likewise.
	(copy_phis_for_bb): Likewise.
	(expand_call_inline): Likewise.
	* tree-streamer-in.c (lto_input_ts_exp_tree_pointers): Likewise.
	* tree-streamer-out.c (write_ts_decl_minimal_tree_pointers): Likewise.
	* gimple-streamer-out.c (output_gimple_stmt): Likewise.
	* combine.c (try_combine): Likewise.
	* tree-outof-ssa.c (set_location_for_edge): Likewise.
	(insert_partition_copy_on_edge): Likewise.
	(insert_value_copy_on_edge): Likewise.
	(insert_rtx_to_part_on_edge): Likewise.
	(insert_part_to_rtx_on_edge): Likewise.
	* basic-block.h (edge_def): Remove field.
	* gimple.h (gimple_statement_base): Remove field.
	(gimple_bb): Change to use new location.
	(gimple_set_block): Likewise.
	(gimple_has_location): Likewise.
	* tree-cfg.c (make_cond_expr_edges): Likewise.
	(make_goto_expr_edges): Likewise.
	(gimple_can_merge_blocks_p): Likewise.
	(move_stmt_op): Likewise.
	(move_block_to_fn): Likewise.
	* config/alpha/alpha.c (alpha_output_mi_thunk_osf): Likewise.
	* config/sparc/sparc.c (sparc_output_mi_thunk): Likewise.
	* config/i386/i386.c (x86_output_mi_thunk): Likewise.
	* config/tilegx/tilegx.c (tilegx_output_mi_thunk): Likewise.
	* config/sh/sh.c (sh_output_mi_thunk): Likewise.
	* config/ia64/ia64.c (ia64_output_mi_thunk): Likewise.
	* config/rs6000/rs6000.c (rs6000_output_mi_thunk): Likewise.
	* config/score/score.c (score_output_mi_thunk): Likewise.
	* config/tilepro/tilepro.c (tilepro_asm_output_mi_thunk): Likewise.
	* config/mips/mips.c (mips_output_mi_thunk): Likewise.
	* cfgrtl.c (unique_locus_on_edge_between_p): Likewise.
	(unique_locus_on_edge_between_p): Likewise.
	(emit_nop_for_unique_locus_between): Likewise.
	(force_nonfallthru_and_redirect): Likewise.
	(fixup_reorder_chain): Likewise.
	(cfg_layout_merge_blocks): Likewise.
	* stmt.c (emit_case_nodes): Likewise.

gcc/lto:
	2012-09-19  Dehao Chen  <dehao@google.com>

	* lto/lto.c (lto_fixup_prevailing_decls): Remove tree.exp.block field.

libcpp:
	2012-09-19  Dehao Chen  <dehao@google.com>

	* include/line-map.h (MAX_SOURCE_LOCATION): New value.
	(location_adhoc_data_fini): New.
	(get_combined_adhoc_loc): New.
	(get_data_from_adhoc_loc): New.
	(get_location_from_adhoc_loc): New.
	(location_adhoc_data_map): New.
	(COMBINE_LOCATION_DATA): New.
	(IS_ADHOC_LOC): New.
	(expanded_location): New field.
	(line_maps): New field.
	* line-map.c (location_adhoc_data): New.
	(location_adhoc_data_hash): New.
	(location_adhoc_data_eq): New.
	(location_adhoc_data_update): New.
	(get_combined_adhoc_loc): New.
	(get_data_from_adhoc_loc): New.
	(get_location_from_adhoc_loc): New.
	(location_adhoc_data_init): New.
	(location_adhoc_data_fini): New.
	(linemap_init): Initialize location_adhoc_data.
	(linemap_lookup): Change to use new location.
	(linemap_ordinary_map_lookup): Likewise.
	(linemap_macro_map_lookup): Likewise.
	(linemap_macro_map_loc_to_def_point): Likewise.
	(linemap_macro_map_loc_unwind_toward_spel): Likewise.
	(linemap_get_expansion_line): Likewise.
	(linemap_get_expansion_filename): Likewise.
	(linemap_location_in_system_header_p): Likewise.
	(linemap_location_from_macro_expansion_p): Likewise.
	(linemap_macro_loc_to_spelling_point): Likewise.
	(linemap_macro_loc_to_def_point): Likewise.
	(linemap_macro_loc_to_exp_point): Likewise.
	(linemap_resolve_location): Likewise.
	(linemap_unwind_toward_expansion): Likewise.
	(linemap_unwind_to_first_non_reserved_loc): Likewise.
	(linemap_expand_location): Likewise.
	(linemap_dump_location): Likewise.
	(linemap_line_start): Likewise.

From-SVN: r191494
 2012-09-19 19:56:42 +00:00
Dodji Seketeli
f3d25c6570 PR preprocessor/53469 - argument tokens of _Pragma miss virtual location 
Consider this short test snippet:

-------------------------8-------------------
    #define STRINGIFY(x) #x
    #define TEST(x) \
      _Pragma(STRINGIFY(GCC diagnostic ignored "-Wunused-local-typedefs")) \
      typedef int myint;

    void bar ()
    {
      TEST(myint)
    }
-------------------------8-------------------

The _Pragma is effectively ignored, and compiling with
-Wunused-local-typedefs warns on the local typedef, even though the
pragma should have prevented the warning to be emitted.

This is because when the preprocessor sees the _Pragma operator and
then goes to handle the first token ('GCC' here) that makes up its
operands, it retains the spelling location of that token, not its
virtual location.

Later when diagnostic_report_diagnostic is called to emit the warning
(or ignore it because of the pragma), it compares the location of the
first operand of the pragma with the location of the unused location,
(by calling linemap_location_before_p) and that comparison fails
because in this case, both locations should be virtual.

This patch fixes the issue by teaching the pragma handling to use
virtual locations.

Bootstrapped and tested on x86_64-unknown-linux-gnu against trunk.

libcpp/

	PR preprocessor/53469
	* directives.c (do_pragma): Use the virtual location for the
	pragma token, instead of its spelling location.

gcc/testsuite/

	PR preprocessor/53469
	* gcc.dg/cpp/_Pragma7.c: New test case.

From-SVN: r190714
 2012-08-27 17:41:38 +02:00
Diego Novillo
0823efedd0 backport: As described in http://gcc.gnu.org/ml/gcc/2012-08/msg00015.html... 
Merge from cxx-conversion branch (http://gcc.gnu.org/wiki/cxx-conversion).

As described in http://gcc.gnu.org/ml/gcc/2012-08/msg00015.html, this patch
changes the default bootstrap process so that stage 1 always builds with a C++
compiler.

Other than the bootstrap change, the patch makes no functional changes to the
compiler.  Everything should build as it does now in trunk.  The main
changes in this patch are:

1- Configuration changes.
2- Re-write of VEC.
3- Re-write of gengtype to support C++ templates and
   user-provided marking functions.
4- New hash table class.
5- Re-write double_int.
6- Implement tree macros as inline functions so they can be
   called from gdb.

As discussed before, several of these changes do not fully change
the call sites to use the new APIs.

The bootstrap changes have already been tested on a wide range of
targets (http://gcc.gnu.org/wiki/CppBuildStatus).  Additionally,
I have tested the merged trunk on: x86_64-unknown-linux-gnu,
mips64el-unknown-linux-gnu, powerpc64-unknown-linux-gnu,
i686-pc-linux-gnu, and ia64-unknown-linux-gnu.

ChangeLog
2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.

	* Makefile.tpl (STAGE[+id+]_CXXFLAGS): Remove
	POSTSTAGE1_CONFIGURE_FLAGS.
	* Makefile.in: Regenerate.
	* configure.ac (ENABLE_BUILD_WITH_CXX): Remove.  Update all users.
	Force C++ when bootstrapping.
	* configure: Regenerate.


libcpp/ChangeLog
2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.  Configury.

	* Makefile.in: Remove all handlers of ENABLE_BUILD_WITH_CXX.
	* configure.ac: Likewise.
	* configure: Regenerate.

2012-08-14   Lawrence Crowl  <crowl@google.com>

	Merge from cxx-conversion branch.  New C++ hash table.

	* include/symtab.h (typedef struct ht hash_table): Change the typedef
	name to cpp_hash_table.  Update all users of the typedef.

gcc/ChangeLog
2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.  Configury.

	* configure.ac (CXX_FOR_BUILD): Define and substitute.
	(BUILD_CXXFLAGS): Define.
	Remove all handlers of ENABLE_BUILD_WITH_CXX.
	Force all build to be with C++.
	* Makefile.in (BUILD_CXXFLAGS): Use it.
	Remove all handlers of ENABLE_BUILD_WITH_CXX.
	* configure: Regenerate.
	* config.in: Regenerate.
	* doc/install.texi: Remove documentation for --enable-build-with-cxx
	and --enable-build-poststage1-with-cxx.

2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.  Re-implement VEC in C++.

	* vec.c (vec_heap_free): Convert into a template function.
	(vec_gc_o_reserve_1): Make extern.
	(vec_gc_p_reserve): Remove.
	(vec_gc_p_reserve_exact): Remove.
	(vec_gc_o_reserve): Remove.
	(vec_gc_o_reserve_exact): Remove.
	(vec_heap_o_reserve_1): Make extern.
	(vec_heap_p_reserve): Remove.
	(vec_heap_p_reserve_exact): Remove.
	(vec_heap_o_reserve): Remove.
	(vec_heap_o_reserve_exact): Remove.
	(vec_stack_p_reserve): Remove.
	(vec_stack_p_reserve_exact): Remove.
	* vec.h (VEC_CHECK_INFO, VEC_CHECK_DECL, VEC_CHECK_PASS,
	VEC_ASSERT, VEC_ASSERT_FAIL, vec_assert_fail): Move earlier
	in the file.
	(VEC): Define to vec_t<T>.
	(vec_allocation_t): Define.
	(struct vec_prefix): Move earlier in the file.
	(vec_t<T>): New template.
	(DEF_VEC_I, DEF_VECL_ALLOC_I, DEF_VEC_P, DEF_VEC_ALLOC_P,
	DEF_VEC_O, DEF_VEC_ALLOC_P, DEF_VEC_O, DEF_VEC_ALLOC_O,
	DEF_VEC_ALLOC_P_STACK, DEF_VEC_ALLOC_O_STACK,
	DEF_VEC_ALLOC_I_STACK): Expand to 'struct vec_swallow_trailing_semi'.
	(DEF_VEC_A): Provide template instantiations for
	GC/PCH markers that do not traverse the vector.
	(vec_stack_p_reserve): Remove.
	(vec_stack_p_reserve_exact): Remove.
	(vec_stack_p_reserve_exact_1): Remove.
	(vec_stack_o_reserve): Remove.
	(vec_stack_o_reserve_exact): Remove.
	(vec_stack_free): Re-write as a template function.
	(vec_reserve): New template function.
	(vec_reserve_exact): New template function.
	(vec_heap_free): New template function if GATHER_STATISTICS is
	defined.  Otherwise, macro that expands to free().
	(VEC_length_1): New template function.
	(VEC_length): Call it.
	(VEC_empty_1): New template function.
	(VEC_empty): Call it.
	(VEC_address_1): New template function.
	(VEC_address): Call it.
	(VEC_last_1): New template function.
	(VEC_last): Call it.  Change return type to T&.
	Change all users that used VEC_Os.
	(VEC_index_1): New template function.
	(VEC_index): Call it.  Return a T& instead of a T*.
	Update all callers that were using VEC_O before.
	(VEC_iterate_1): New template function.
	(VEC_iterate): Call it.
	(VEC_embedded_size_1): New template function.
	(VEC_embedded_size): Call it.
	(VEC_embedded_init_1): New template function.
	(VEC_embedded_init): Call it.
	(VEC_alloc_1): New template function.
	(VEC_alloc): Call it.  If A is 'stack', call XALLOCAVAR to
	do the allocation.
	(VEC_free_1): New template function.
	(VEC_free): Call it.
	(VEC_copy_1): New template function.
	(VEC_copy): Call it.
	(VEC_space_1): New template function
	(VEC_space): Call it.
	(VEC_reserve_1): New template function.
	(VEC_reserve): Call it.
	(VEC_reserve_exact_1): New template function.
	(VEC_reserve_exact): Call it.
	(VEC_splice_1): New template function.
	(VEC_splice): Call it.
	(VEC_safe_splice_1): New template function.
	(VEC_safe_splice): Call it.
	(VEC_quick_push_1): New template function.  Create two overloads, one
	accepting T, the other accepting T *.  Update all callers
	where T and T * are ambiguous.
	(VEC_quick_push): Call it.
	(VEC_safe_push_1): New template function. Create two overloads, one
	accepting T, the other accepting T *.  Update all callers
	where T and T * are ambiguous.
	(VEC_safe_push): Call it.
	(VEC_pop_1): New template function.
	(VEC_pop): Call it.
	(VEC_truncate_1): New template function.
	(VEC_truncate): Call it.
	(VEC_safe_grow_1): New template function.
	(VEC_safe_grow): Call it.
	(VEC_safe_grow_cleared_1): New template function.
	(VEC_safe_grow_cleared): Call it.
	(VEC_replace_1): New template function.
	(VEC_replace): Call it.  Always accept T instead of T*.
	Update all callers that used VEC_Os.
	(VEC_quick_insert_1): New template function.
	(VEC_quick_insert): Call it.
	(VEC_safe_insert_1): New template function.
	(VEC_safe_insert): Call it.
	(VEC_ordered_remove_1): New template function.
	(VEC_ordered_remove): Call it.
	(VEC_unordered_remove_1): New template function.
	(VEC_unordered_remove): Call it.
	(VEC_block_remove_1): New template function.
	(VEC_block_remove): Call it.
	(VEC_lower_bound_1): New template function.
	(VEC_lower_bound): Call it.
	(VEC_OP): Remove.
	(DEF_VEC_FUNC_P): Remove.
	(DEF_VEC_ALLOC_FUNC_P): Remove.
	(DEF_VEC_NONALLOC_FUNCS_P): Remove.
	(DEF_VEC_FUNC_O): Remove.
	(DEF_VEC_ALLOC_FUNC_O): Remove.
	(DEF_VEC_NONALLOC_FUNCS_O): Remove.
	(DEF_VEC_ALLOC_FUNC_I): Remove.
	(DEF_VEC_NONALLOC_FUNCS_I): Remove.
	(DEF_VEC_ALLOC_FUNC_P_STACK): Remove.
	(DEF_VEC_ALLOC_FUNC_O_STACK): Remove.
	(DEF_VEC_ALLOC_FUNC_I_STACK): Remove.
	(vec_reserve_exact): New template function.

	* gengtype-lex.l (DEF_VEC_ALLOC_[IOP]/{EOID}): Remove.
	* gengtype-parse.c (token_names): Remove DEF_VEC_ALLOC_[IOP].
	(typedef_name): Emit vec_t<C1> instead of VEC_C1_C2.
	(def_vec_alloc): Remove.  Update all callers.
	* gengtype.c (filter_type_name): New.
	(output_mangled_typename): Call it.
	(write_func_for_structure): Likewise.
	(write_types): Likewise.
	(write_root): Likewise.
	(write_typed_alloc_def): Likewise.
	(note_def_vec): Emit vec_t<TYPE_NAME> instead of VEC_TYPE_NAME_base.
	(note_def_vec_alloc): Remove.
	* gengtype.h (note_def_vec_alloc): Remove.
	(DEFVEC_ALLOC): Remove token code.

	* df-scan.c (df_bb_verify): Remove call to df_free_collection_rec
	inside the insn traversal loop.
	* gimplify.c (gimplify_compound_lval): Rename STACK to EXPR_STACK.
	* ipa-inline.c (inline_small_functions): Rename HEAP to EDGE_HEAP.
	* reg-stack.c (stack): Rename to STACK_PTR.  Update all users.
	* tree-vrp.c (stack): Rename to EQUIV_STACK.  Update all users.

	* config/bfin/bfin.c (hwloop_optimize): Update some calls to
	VEC_* for vectors of non-pointers.
	* config/c6x/c6x.c (try_rename_operands): Likewise.
	(reshuffle_units): Likewise.
	* config/mips/mips.c (mips_multi_start): Likewise.
	(mips_multi_add): Likewise.
	(mips_multi_copy_insn): Likewise.
	(mips_multi_set_operand): Likewise.
	* hw-doloop.c (discover_loop): Likewise.
	(discover_loops): Likewise.
	(reorg_loops): Likewise.

2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.  C++ support in gengtype.

	* coretypes.h (gt_pointer_operator): Move from ...
	* ggc.h: ... here.
	* doc/gty.texi: Document support for C++ templates and
	user-provided markers.
	* gcc/gengtype-lex.l: Update copyright year.
	Remove support for recognizing DEF_VEC_O, DEF_VEC_P and
	DEFVEC_I.
	* gengtype-parse.c: Update copyright year.
	(token_names): Remove DEF_VEC_O, DEF_VEC_P and DEF_VEC_I.
	(require_template_declaration): New.
	(typedef_name): Call it.
	(type): Replace IS_UNION with KIND. Replace all users.
	(def_vec): Remove.  Update all users.
	* gengtype-state.c (type_lineloc): Handle TYPE_USER_STRUCT.
	(write_state_user_struct_type): New.
	(write_state_type): Call it.
	(read_state_user_struct_type): New.
	(read_state_type): Call it.
	* gengtype.c: Update copyright year.
	(dump_pair): Move declaration to the top.
	(dump_type): Likewise.
	(dump_type_list): Likewise.
	(dbgprint_count_type_at): Handle TYPE_USER_STRUCT.
	(create_user_defined_type): New.
	(resolve_typedef): Call it.
	(new_structure): Replace argument ISUNION with KIND.
	Change users to refer to KIND directly.
	Update all callers.
	(find_structure): Likewise.
	(set_gc_used_type): Handle TYPE_USER_STRUCT.
	(create_file): Update HDR to include new copyright year.
	(struct walk_type_data): Add field IN_PTR_FIELD.
	(output_mangled_typename): Handle TYPE_USER_STRUCT.
	(walk_type): Set D->IN_PTR_FIELD when walking a TYPE_POINTER.
	Clear it afterwards.
	Handle TYPE_USER_STRUCT.
	(write_types_process_field): Handle TYPE_USER_STRUCT.
	(get_type_specifier): Move earlier in the file.
	(write_type_decl): New.
	(write_marker_function_name): New.
	(write_user_func_for_structure_ptr): New.
	(write_user_func_for_structure_body): New.
	(write_user_marking_functions): New.
	(write_func_for_structure): Call write_marker_function_name
	and write_type_decl.
	Do not call walk_type for TYPE_USER_STRUCT. Emit a call to the user
	function directly.
	Call write_user_marking_functions on TYPE_USER_STRUCTs.
	(write_types_local_user_process_field): New.
	(write_pch_user_walking_for_structure_body): New.
	(write_pch_user_walking_functions): New.
	(write_types_local_process_field): Handle TYPE_USER_STRUCT.
	(write_local_func_for_structure): Do not call walk_type for
	TYPE_USER_STRUCT. Instead, emit the call to gt_pch_nx directly.
	Call write_pch_user_walking_functions for TYPE_USER_STRUCTs.
	(write_root): Handle TYPE_USER_STRUCT.
	(vec_prefix_type): Remove.  Update all users.
	(note_def_vec): Remove.  Update all users.
	(dump_typekind): Handle TYPE_USER_STRUCT.
	(dump_type): Initialize SEEN_TYPES, if needed.
	Handle TYPE_USER_STRUCT.
	(dump_everything): Do not initialize SEEN_TYPES.
	* gengtype.h: Update copyright year.
	(enum typekind): Add TYPE_USER_STRUCT.
	(union_or_struct_p): Rename from UNION_OR_STRUCT_P.
	Convert into function.
	Add an overload taking const_type_p.
	Update all callers.
	(new_structure): Change second field to type enum typekind.
	Update all users.
	(find_structure): Likewise.
	(note_def_vec): Remove.
	(DEFVEC_OP): Remove.
	(DEFVEC_I): Remove.
	* ggc-page.c (gt_ggc_mx): Add entry points for marking
	'const char *&', 'unsigned char *&' and 'unsigned char&'.
	* ggc-zone.c (gt_ggc_mx): Add entry points for marking
	'const char *&' and 'unsigned char *&'.
	* stringpool.c (gt_pch_nx): Add entry points for marking
	'const char *&', 'unsigned char *&' and 'unsigned char&'.
	Add an entry point for the overload taking arguments 'unsigned char
	*', 'gt_pointer_operator' and 'void *'.
	* vec.h (struct vec_prefix): Remove GTY marker.
	(struct vec_t): Remove GTY((length)) attribute from field 'vec'.
	(gt_ggc_mx (vec_t<T> *)): New template function.
	(gt_pch_nx (vec_t<T> *)): New template function.
	(gt_pch_nx (vec_t<T *> *, gt_pointer_operator, void *)): New template
	function.
	(gt_pch_nx (vec_t<T> *, gt_pointer_operator, void *)): New template
	function.

	* basic-block.h (struct edge_def): Mark GTY((user)).
	Remove all GTY markers from fields.
	(gt_ggc_mx): Declare.
	(gt_pch_nx): Declare.
	* tree-cfg.c (gt_ggc_mx): New.
	(gt_pch_nx): New.

	* gengtype-lex.l (USER_GTY): Add pattern for "user".
	* gengtype-parse.c (option): Handle USER_GTY.
	(opts_have): New.
	(type): Call it.
	If the keyword 'user' is used, do not walk the fields
	of the structure.
	* gengtype.h (USER_GTY): Add.
	* doc/gty.texi: Update.

2012-08-14   Lawrence Crowl  <crowl@google.com>

	Merge cxx-conversion branch.  Implement C++ hash table.

	* hash-table.h: New. Implementation borrowed from libiberty/hashtab.c.
	* hash-table.c: Likewise.
	* tree-ssa-tail-merge.c: Include hash-table.h instead of hashtab.h.
	(static htab_t same_succ_htab): Change type to hash_table;
	move specification of helper functions from create call to declaration.
	Change users to invoke member functions.
	(same_succ_print_traverse): Make extern ssa_.... Change callers.
	Remove void* casting.
	(same_succ_hash): Likewise.
	(same_succ_equal): Likewise.
	(same_succ_delete): Likewise.
	* tree-ssa-threadupdate.c: Include hash-table.h.
	(struct local_info): Rename to ssa_local_info_t to avoid overloading
	the type name local_info with the variable name local_info.
	(static htab_t redirection_data): Change type to hash_table.
	Move specification of helper functions from create call to declaration.
	Change users to invoke member functions.
	(redirection_data_hash): Make extern ssa_.... Change callers.
	Remove void* casting.
	(redirection_data_eq): Likewise.
	(fix_duplicate_block_edges): Likewise.
	(create_duplicates): Likewise.
	(fixup_template_block): Likewise.
	(redirect_edges): Likewise.
	(lookup_redirection_data): Change types associated with the hash table
	from void* to their actual type. Remove unnecessary casts.
	* tree-ssa-ccp.c: Include hash-table.h.
	(typedef gimple_htab): New.  Uses hash_table.  Replace specific uses
	of htab_t with gimple_htab.  Change users to invoke member functions.
	Move specification of helper functions from create call to declaration.
	* tree-ssa-coalesce.c: Include hash-table.h instead of hashtab.h.
	(hash_ssa_name_by_var): Make extern. Remove void* casting.
	(eq_ssa_name_by_var): Likewise.
	(coalesce_ssa_name): Change type of local static htab_t ssa_name_hash
	to hash_table. Change users to invoke member functions.
	Move specification of helper functions from create call to declaration.
	* coverage.c: Include hash-table.h instead of hashtab.h.
	(static htab_t counts_hash): Change type to hash_table;
	move specification of helper functions from create call to declaration.
	Change users to invoke member functions.
	(htab_counts_entry_hash): Make extern. Rename with coverage_... instead
	of htab_... Remove void* casting.
	(htab_counts_entry_eq): Likewise.
	(htab_counts_entry_del): Likewise.
	* tree-ssa-pre.c: Include hash-table.h instead of hashtab.h.
	(static htab_t expression_to_id): Change type to hash_table.
	Move specification of helper functions from create call to declaration.
	Change users to invoke member functions.
	(static htab_t phi_translate_table): Likewise.
	(pre_expr_eq): Make extern ssa_.... Change callers.
	Remove void* casting.
	(pre_expr_hash): Likewise.
	(expr_pred_trans_hash): Likewise.
	(expr_pred_trans_eq): Likewise.
	(alloc_expression_id): Change types associated with the hash table
	from void* to their actual type. Remove unnecessary casts.
	(lookup_expression_id): Likewise.
	(phi_trans_lookup): Likewise.
	(phi_trans_add): Likewise.
	* stringpool.c: Rename uses of libcpp typedef hash_table to
	cpp_hash_table.
	* Makefile.in: Add hash-table.o to OBJS-libcommon-target.
	Add $(HASH_TABLE_H). Add new dependences on $(HASH_TABLE_H).

2012-08-14   Lawrence Crowl  <crowl@google.com>

	Merge from cxx-conversion branch.  Re-write double_int in C++.

	* hash-table.h
	(typedef double_int): Change to struct (POD).
	(double_int::make): New overloads for int to double-int conversion.
	(double_int::mask): New.
	(double_int::max_value): New.
	(double_int::min_value): New.
	(double_int::operator ++): New.
	(double_int::operator --): New.
	(double_int::operator *=): New.
	(double_int::operator +=): New.
	(double_int::operator -=): New.
	(double_int::to_signed): New.
	(double_int::to_unsigned): New.
	(double_int::fits_unsigned): New.
	(double_int::fits_signed): New.
	(double_int::fits): New.
	(double_int::trailing_zeros): New.
	(double_int::popcount): New.
	(double_int::multiple_of): New.
	(double_int::set_bit): New.
	(double_int::mul_with_sign): New.
	(double_int::operator * (binary)): New.
	(double_int::operator + (binary)): New.
	(double_int::operator - (binary)): New.
	(double_int::operator - (unary)): New.
	(double_int::operator ~ (unary)): New.
	(double_int::operator & (binary)): New.
	(double_int::operator | (binary)): New.
	(double_int::operator ^ (binary)): New.
	(double_int::and_not): New.
	(double_int::lshift): New.
	(double_int::rshift): New.
	(double_int::alshift): New.
	(double_int::arshift): New.
	(double_int::llshift): New.
	(double_int::lrshift): New.
	(double_int::lrotate): New.
	(double_int::rrotate): New.
	(double_int::div): New.
	(double_int::sdiv): New.
	(double_int::udiv): New.
	(double_int::mod): New.
	(double_int::smod): New.
	(double_int::umod): New.
	(double_int::divmod): New.
	(double_int::sdivmod): New.
	(double_int::udivmod): New.
	(double_int::ext): New.
	(double_int::zext): New.
	(double_int::sext): New.
	(double_int::is_zero): New.
	(double_int::is_one): New.
	(double_int::is_minus_one): New.
	(double_int::is_negative): New.
	(double_int::cmp): New.
	(double_int::ucmp): New.
	(double_int::scmp): New.
	(double_int::ult): New.
	(double_int::ugt): New.
	(double_int::slt): New.
	(double_int::sgt): New.
	(double_int::max): New.
	(double_int::smax): New.
	(double_int::umax): New.
	(double_int::min): New.
	(double_int::smin): New.
	(double_int::umin): New.
	(double_int::operator ==): New.
	(double_int::operator !=): New.
	(shwi_to_double_int): Change implementation to use member function.
	(double_int_minus_one): Likewise.
	(double_int_zero): Likewise.
	(double_int_one): Likewise.
	(double_int_two): Likewise.
	(double_int_ten): Likewise.
	(uhwi_to_double_int): Likewise.
	(double_int_to_shwi): Likewise.
	(double_int_to_uhwi): Likewise.
	(double_int_fits_in_uhwi_p): Likewise.
	(double_int_fits_in_shwi_p): Likewise.
	(double_int_fits_in_hwi_p): Likewise.
	(double_int_mul): Likewise.
	(double_int_mul_with_sign): Likewise.
	(double_int_add): Likewise.
	(double_int_sub): Likewise.
	(double_int_neg): Likewise.
	(double_int_div): Likewise.
	(double_int_sdiv): Likewise.
	(double_int_udiv): Likewise.
	(double_int_mod): Likewise.
	(double_int_smod): Likewise.
	(double_int_umod): Likewise.
	(double_int_divmod): Likewise.
	(double_int_sdivmod): Likewise.
	(double_int_udivmod): Likewise.
	(double_int_multiple_of): Likewise.
	(double_int_setbit): Likewise.
	(double_int_ctz): Likewise.
	(double_int_not): Likewise.
	(double_int_ior): Likewise.
	(double_int_and): Likewise.
	(double_int_and_not): Likewise.
	(double_int_xor): Likewise.
	(double_int_lshift): Likewise.
	(double_int_rshift): Likewise.
	(double_int_lrotate): Likewise.
	(double_int_rrotate): Likewise.
	(double_int_cmp): Likewise.
	(double_int_scmp): Likewise.
	(double_int_ucmp): Likewise.
	(double_int_max): Likewise.
	(double_int_smax): Likewise.
	(double_int_umax): Likewise.
	(double_int_min): Likewise.
	(double_int_smin): Likewise.
	(double_int_umin): Likewise.
	(double_int_ext): Likewise.
	(double_int_sext): Likewise.
	(double_int_zext): Likewise.
	(double_int_mask): Likewise.
	(double_int_max_value): Likewise.
	(double_int_min_value): Likewise.
	(double_int_zero_p): Likewise.
	(double_int_one_p): Likewise.
	(double_int_minus_one_p): Likewise.
	(double_int_equal_p): Likewise.
	(double_int_popcount): Likewise.
	* hash-table.c
	(double_int_mask): Reuse implementation for double_int::mask.
	(double_int_max_value): Likewise.
	(double_int_min_value): Likewise.
	(double_int_ext): Likewise.
	(double_int_zext): Likewise.
	(double_int_sext): Likewise.
	(double_int_mul_with_sign): Likewise.
	(double_int_divmod): Likewise.
	(double_int_sdivmod): Likewise.
	(double_int_udivmod): Likewise.
	(double_int_div): Likewise.
	(double_int_sdiv): Likewise.
	(double_int_udiv): Likewise.
	(double_int_mod): Likewise.
	(double_int_smod): Likewise.
	(double_int_umod): Likewise.
	(double_int_multiple_of): Likewise.
	(double_int_lshift): Likewise.
	(double_int_rshift): Likewise.
	(double_int_lrotate): Likewise.
	(double_int_rrotate): Likewise.
	(double_int_cmp): Likewise.
	(double_int_ucmp): Likewise.
	(double_int_scmp): Likewise.
	(double_int_max): Likewise.
	(double_int_smax): Likewise.
	(double_int_umax): Likewise.
	(double_int_min): Likewise.
	(double_int_smin): Likewise.
	(double_int_umin): Likewise.
	(double_int_min): Likewise.
	(double_int_min): Likewise.
	(double_int_min): Likewise.
	(double_int_min): Likewise.
	(double_int_min): Likewise.
	(double_int_min): Likewise.
	(double_int::alshift): New.
	(double_int::arshift): New.
	(double_int::llshift): New.
	(double_int::lrshift): New.
	(double_int::ult): New.
	(double_int::ugt): New.
	(double_int::slt): New.
	(double_int::sgt): New.
	(double_int_setbit): Reuse implementation for double_int::set_bit,
	which avoids a name conflict with a macro.
	(double_int_double_int_ctz): Reuse implementation for
	double_int::trailing_zeros.
	(double_int_fits_in_shwi_p): Reuse implementation for
	double_int::fits_signed.
	(double_int_fits_in_hwi_p): Reuse implementation for double_int::fits.
	(double_int_mul): Reuse implementation for binary
	double_int::operator *.
	(double_int_add): Likewise.
	(double_int_sub): Likewise.
	(double_int_neg): Reuse implementation for unary
	double_int::operator -.
	(double_int_max_value): Likewise.
	* fixed-value.c: Change to use member functions introduced above.

2012-08-14   Lawrence Crowl  <crowl@google.com>

	Merge cxx-conversion branch.  Support tree macro calling
	from gdb.

	* tree.h (tree_check): New.
	(TREE_CHECK): Use inline function above instead of __extension__.
	(tree_not_check): New.
	(TREE_NOT_CHECK): Use inline function above instead of __extension__.
	(tree_check2): New.
	(TREE_CHECK2): Use inline function above instead of __extension__.
	(tree_not_check2): New.
	(TREE_NOT_CHECK2): Use inline function above instead of __extension__.
	(tree_check3): New.
	(TREE_CHECK3): Use inline function above instead of __extension__.
	(tree_not_check3): New.
	(TREE_NOT_CHECK3): Use inline function above instead of __extension__.
	(tree_check4): New.
	(TREE_CHECK4): Use inline function above instead of __extension__.
	(tree_not_check4): New.
	(TREE_NOT_CHECK4): Use inline function above instead of __extension__.
	(tree_check5): New.
	(TREE_CHECK5): Use inline function above instead of __extension__.
	(tree_not_check5): New.
	(TREE_NOT_CHECK5): Use inline function above instead of __extension__.
	(contains_struct_check): New.
	(CONTAINS_STRUCT_CHECK): Use inline function above instead of
	__extension__.
	(tree_class_check): New.
	(TREE_CLASS_CHECK): Use inline function above instead of __extension__.
	(tree_range_check): New.
	(TREE_RANGE_CHECK): Use inline function above instead of __extension__.
	(omp_clause_subcode_check): New.
	(OMP_CLAUSE_SUBCODE_CHECK): Use inline function above instead of
	__extension__.
	(omp_clause_range_check): New.
	(OMP_CLAUSE_RANGE_CHECK): Use inline function above instead of
	__extension__.
	(expr_check): New.
	(EXPR_CHECK): Use inline function above instead of __extension__.
	(non_type_check): New.
	(NON_TYPE_CHECK): Use inline function above instead of __extension__.
	(tree_vec_elt_check): New.
	(TREE_VEC_ELT_CHECK): Use inline function above instead of
	__extension__.
	(omp_clause_elt_check): New.
	(OMP_CLAUSE_ELT_CHECK): Use inline function above instead of
	__extension__.
	(tree_operand_check): New.
	(TREE_OPERAND_CHECK): Use inline function above instead of
	__extension__.
	(tree_operand_check_code): New.
	(TREE_OPERAND_CHECK_CODE): Use inline function above instead of
	__extension__.
	(TREE_CHAIN): Simplify implementation.
	(TREE_TYPE): Simplify implementation.
	(tree_operand_length): Move for compilation dependences.
	* gdbinit.in: (macro define __FILE__): New.
	(macro define __LINE__): New.
	(skip "tree.h"): New.

gcc/cp/ChangeLog
2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.  Re-write VEC in C++.

	* call.c (add_function_candidate): Remove const qualifier
	from call to VEC_index.

2012-08-14   Diego Novillo  <dnovillo@google.com>

	Merge from cxx-conversion branch.  Configury.

	* go-c.h: Remove all handlers of ENABLE_BUILD_WITH_CXX.
	* go-gcc.cc: Likewise.
	* go-system.h: Likewise.

From-SVN: r190402
 2012-08-14 21:56:07 -04:00
Laurynas Biveinis
c0fd34971d gengtype.c (adjust_field_type): Diagnose duplicate "length" option applications and option being applied to... 
gcc:
2012-07-27  Laurynas Biveinis  <laurynas.biveinis@gmail.com>
	    Steven Bosscher  <steven@gcc.gnu.org>

	* gengtype.c (adjust_field_type): Diagnose duplicate "length"
	option applications and option being applied to arrays of atomic
	types.
	(walk_type): Allow "atomic" option on strings too.
	* dwarf2out.h (struct dw_vec_struct): Use the "atomic" GTY option
	for the array field.
	* vec.h: Describe the atomic object "A" type of the macros in
	the header comment.
	(VEC_T_GTY_ATOMIC, DEF_VEC_A, DEF_VEC_ALLOC_A): Define.
	* emit-rtl.c (locations_locators_vals): use the atomic object
	vector.
	* doc/gty.texi: Clarify that GTY option "length" is only for
	arrays of non-atomic objects.  Fix typo in the description of the
	"atomic" option.

gcc/java:
2012-07-24  Laurynas Biveinis  <laurynas.biveinis@gmail.com>

	* jcf.h (CPool): Use the "atomic" GTY option for the tags field.
	(bootstrap_method): Likewise for the bootstrap_arguments field.

libcpp:
2012-07-24  Laurynas Biveinis  <laurynas.biveinis@gmail.com>

	* include/line-map.h (line_map_macro): Use the "atomic" GTY option
	for the macro_locations field.

Co-Authored-By: Steven Bosscher <steven@gcc.gnu.org>

From-SVN: r189951
 2012-07-30 02:30:52 +00:00
Uros Bizjak
d35d1c0fee lex.c (search_line_sse42): Use __builtin_ia32_loaddqu and __builtin_ia32_pcmpestri128 instead of asm. 
* lex.c (search_line_sse42): Use __builtin_ia32_loaddqu and
	__builtin_ia32_pcmpestri128 instead of asm.

From-SVN: r188782
 2012-06-19 18:28:50 +02:00
Dimitrios Apostolou
d86d21192b line-map.c (linemap_enter_macro): Don't zero max_column_hint in every macro. 
* line-map.c (linemap_enter_macro): Don't zero max_column_hint in
 	every macro. This improves performance by reducing the number of
 	reallocations when track-macro-expansion is on.

From-SVN: r188242
 2012-06-05 10:25:46 -04:00
Dodji Seketeli
7ca643e17e PR preprocessor/53463 - Fix system header detection for built-in macro tokens 
The location for a built-in macro token is BUILTIN_LOCATION.  When we
see that location value, we cannot know if that token was used in a
system header or not.  And that can trigger some unwanted warnings on
e.g, the use of __LONG_LONG_MAX__ built-in macro in system headers
when we compile with -pedantic, like in the test case accompanying
this patch.

In that case, I think we ought to step-up to see where the built-in
macro has been expanded, until we see a location that is not for a
built-in macro.  Then we can check if the resulting location is in a
system header or not.

Now that we step up to the location of first non-built-in-macro token,
it appeared that for
testsuite/c-c++-common/dfp/convert-int-saturate.c, G++ then fails to
emit the warning in:

    volatile unsigned int usi;
    int
    main ()
    {
      usi = DEC32_MAX;  /* { dg-warning "overflow in implicit constant conversion" } */
     ...
    }

Because DEC32_MAX is defined in the system header float.h as a
built-in macro:

    #define DEC32_MAX	__DEC32_MAX__

And during the parsing of the assignment expression that should have
led to the warning above, input_location is set to the location for
the DEC32_MAX, which is actually the location for the built-in
__DECL32_MAX_EXP.

A possible fix is to use the location of the "=" operator as the
default location for assignment expressions.  This is what the patch
does.

I had to adjust a couple of tests to arrange for this.

Bootstrapped and tested on x86_64-unknown-linux-gnu against trunk.

libcpp/

	PR preprocessor/53463
	* line-map.c (linemap_location_in_system_header_p): For built-in
	macro tokens, check the first expansion point location for that is
	not for a token coming from a built-in macro.

gcc/cp/

	PR preprocessor/53463
	* parser.c (cp_parser_assignment_expression): Use the location
	for the LHS as the default location for the expression.

gcc/testsuite/

	PR preprocessor/53463
	* g++.dg/cpp/limits.C: New test.
	* g++.dg/parse/error19.C: Adjust.
	* g++.dg/warn/Wconversion-real-integer2.C: Likewise.
	* g++.dg/warn/pr35635.C: Likewise.
	* g++.old-deja/g++.pt/assign1.C: Likewise.

From-SVN: r188203
 2012-06-04 21:19:58 +02:00
Joseph Myers
7d9641ccfa directives.c: Fix typos. 
* directives.c: Fix typos.
	* include/line-map.h: Fix typos.
	* line-map.c: Fix typos.
	* macro.c: Fix typos.

From-SVN: r187966
 2012-05-29 15:53:50 +01:00
Dodji Seketeli
53a103d304 PR bootstrap/53459 - unused local typedef when building on altivec 
PR bootstrap/53459
	* lex.c (search_line_fast): Avoid unused local typedefs to simulate
	a static assertion.

From-SVN: r187947
 2012-05-29 11:42:39 +02:00
Dodji Seketeli
6de6b1ec5f Revert "PR bootstrap/53459 - unused local typedef when building on altivec" 
This reverts commit r187853

From-SVN: r187946
 2012-05-29 11:42:28 +02:00
Dodji Seketeli
828a7f76c7 PR preprocessor/53229 - Fix diagnostics location when pasting tokens 
As stated in the audit trail of this problem report, consider this
test case:

    $ cat test.c
	 1	struct x {
	 2	  int i;
	 3	};
	 4	struct x x;
	 5
	 6	#define TEST(X) x.##X
	 7
	 8	void foo (void)
	 9	{
	10	  TEST(i) = 0;
	11	}
    $

    $ cc1 -quiet test.c
    test.c: In function 'foo':
    test.c:10:1: error: pasting "." and "i" does not give a valid preprocessing token
       TEST(i) = 0;
     ^
    $

So, when pasting tokens, the error diagnostic uses the global and
imprecise input_location variable, leading to an imprecise output.

To properly fix this, I think libcpp should keep the token of the
pasting operator '##', instead of representing it with flag on the LHS
operand's token.  That way, it could use its location.  Doing that
would be quite intrusive though.  So this patch just uses the location
of the LHS of the pasting operator, for now.  It's IMHO better than
the current situation.

The patch makes paste_tokens take a location parameter that is used in
the diagnostics.  This change can still be useful later when we can
use the location of the pasting operator, because paste_tokens will
just be passed the new, more precise location.

Incidentally, it appeared that when getting tokens from within
preprocessor directives (like what is done in gcc.dg/cpp/paste12.c),
with -ftrack-macro-expansion disabled, the location of the expansion
point of macros was being lost because
cpp_reader::set_invocation_location wasn't being properly set.  It's
because when cpp_get_token_1 calls enter_macro_context, there is a
little period of time between the beginning of that later function and
when the macro is really pushed (and thus when the macro is really
expanded) where we wrongly consider that we are not expanding the
macro because macro_of_context is still NULL.  In that period of time,
in the occurrences of indirect recursive calls to cpp_get_token_1,
this later function wrongly sets cpp_reader::invocation_location
because cpp_reader::set_invocation_location is not being properly set.

To avoid that confusion the patch does away with
cpp_reader::set_invocation_location and introduces a new flag
cpp_reader::about_to_expand_macro_p that is set in the small time
interval exposed earlier.  A new in_macro_expansion_p is introduced as
well, so that cpp_get_token_1 can now accurately detect when we are in
the process of expanding a macro, and thus correctly collect the
location of the expansion point.

People seem to like screenshots.

Thus, after the patch, we now have:

    $ cc1 -quiet test.c
    test.c: In function 'foo':
    test.c:6:18: error: pasting "." and "i" does not give a valid preprocessing token
     #define TEST(X) x.##X
		      ^
    test.c:10:3: note: in expansion of macro 'TEST'
       TEST(i) = 0;
       ^
    $

Bootstrapped and tested on x86_64-unknown-linux-gnu against trunk.

libcpp/

	PR preprocessor/53229
	* internal.h (cpp_reader::set_invocation_location): Remove.
	(cpp_reader::about_to_expand_macro_p): New member flag.
	* directives.c (do_pragma):  Remove Kludge as
	pfile->set_invocation_location is no more.
	* macro.c (cpp_get_token_1): Do away with the use of
	cpp_reader::set_invocation_location.  Just collect the macro
	expansion point when we are about to expand the top-most macro.
	Do not override cpp_reader::about_to_expand_macro_p.
	This fixes gcc.dg/cpp/paste12.c by making get_token_no_padding
	properly handle locations of expansion points.
	(cpp_get_token_with_location): Adjust, as
	cpp_reader::set_invocation_location is no more.
	(paste_tokens): Take a virtual location parameter for
	the LHS of the pasting operator.  Use it in diagnostics.  Update
	comments.
	(paste_all_tokens): Tighten the assert.  Propagate the location of
	the expansion point when no virtual locations are available.
	Pass the virtual location to paste_tokens.
	(in_macro_expansion_p): New static function.
	(enter_macro_context): Set the cpp_reader::about_to_expand_macro_p
	flag until we really start expanding the macro.

gcc/testsuite/

	PR preprocessor/53229
	* gcc.dg/cpp/paste6.c: Force to run without
	-ftrack-macro-expansion.
	* gcc.dg/cpp/paste8.c: Likewise.
	* gcc.dg/cpp/paste8-2.c: New test, like paste8.c but run with
	-ftrack-macro-expansion.
	* gcc.dg/cpp/paste12.c: Force to run without
	-ftrack-macro-expansion.
	* gcc.dg/cpp/paste12-2.c: New test, like paste12.c but run with
	-ftrack-macro-expansion.
	* gcc.dg/cpp/paste13.c: Likewise.
	* gcc.dg/cpp/paste14.c: Likewise.
	* gcc.dg/cpp/paste14-2.c: New test, like paste14.c but run with
	-ftrack-macro-expansion.
	* gcc.dg/cpp/paste18.c: New test.

From-SVN: r187945
 2012-05-29 11:36:29 +02:00
Dodji Seketeli
27c53c0cce PR bootstrap/53459 - unused local typedef when building on altivec 
libcpp/

	PR bootstrap/53459
	* lex.c (search_line_fast): Remove unused typedef check_count.

From-SVN: r187853
 2012-05-24 23:05:49 +02:00
Dodji Seketeli
0b2c4be5fd PR preprocessor/7263 - Avoid pedantic warnings on system headers macro tokens 
Now that we track token locations accross macro expansions, it would
be cool to be able to fix PR preprocessor/7263 for real.  That is,
consider this example where we have a system header named header.h
like this:

	#define _Complex __complex__ #define _Complex_I 1.0iF

and then a normal C file like this:

    #include "header.h"

    static _Complex float c = _Complex_I;

If we compile the file with -pedantic, the usages of _Complex or
_Complex_I should not trigger any warning, even though __complex__ and
the complex literal are extensions to the standard C.

They shouldn't trigger any warning because _Complex and _Complex_I are
defined in a system header (and expanded in normal user code).

To be able to handle this, we must address two separate concerns.

First, warnings about non-standard usage of numerical literals are emitted
directly from within libcpp.  So we must teach libcpp's parser for numerical
literals to use virtual locations, instead of the spelling
location it uses today.  Once we have that, as the diagnostics machinery
already knows how to avoid emitting errors happening on tokens that come from
system headers, we win.

Second, there is the issue of tracking locations for declaration
specifiers, like the "_Complex" in the declaration:

	static _Complex float c;

For that, we need to arrange for each possible declaration specifier
to have its own location, because otherwise, we'd warn on e.g, on:

    _Complex float c;

but not on:

    static _Complex float c;

So this patch addresses the two concerns above.  It's actually a
follow-up on an earlier patch[1] I wrote as part of my initial work on
virtual locations.  We then agreed[2] that the second concern was
important to address before the patch could get a chance to go in.

[1]: http://gcc.gnu.org/ml/gcc-patches/2011-09/msg00957.html
[2]: http://gcc.gnu.org/ml/gcc-patches/2011-10/msg00264.html

Bootstrapped and tested on x86_64-unknown-linux-gnu against trunk.

libcpp/

	PR preprocessor/7263
	* include/cpplib.h (cpp_classify_number): Take a location
	parameter.
	* expr.c (SYNTAX_ERROR_AT, SYNTAX_ERROR2_AT): New diagnostic
	macros that take a location parameter.
	(cpp_classify_number): Take a (virtual) location parameter.  Use
	it for diagnostics.  Adjust comments.
	(eval_token): Take a location parameter.  Pass it to
	cpp_classify_number and to diagnostic routines.
	(_cpp_parse_expr): Use virtual locations of tokens when parsing
	expressions.  Pass a virtual location to eval_token and to
	diagnostic routines.

gcc/c-family/

	PR preprocessor/7263
	* c-lex.c (c_lex_with_flags):  Pass a virtual location to the call
	to cpp_classify_number.  For diagnostics, use the precise location
	instead of the global input_location.

gcc/
	PR preprocessor/7263
	* c-tree.h (enum c_declspec_word): Declare new enum.
	(struct c_declspecs::locations): New member.
	(declspecs_add_qual, declspecs_add_scspec)
	(declspecs_add_addrspace, declspecs_add_alignas): Take a new
	location parameter.
	* c-decl.c (build_null_declspecs): Initialize the new struct
	c_declspecs::locations member.
	(declspecs_add_addrspace): Take a location parameter for the
	address space.  Store it onto declaration specifiers.
	(declspecs_add_qual): Likewise, take a location parameter for the
	qualifier.
	(declspecs_add_type): Likewise, take a location parameter for the
	type specifier.
	(declspecs_add_scspec): Likewise, take a location parameter for
	the storage class specifier.
	(declspecs_add_attrs): Likewise, take a location parameter for the
	first attribute.
	(declspecs_add_alignas): Likewise, take a location parameter for
	the alignas token.
	(finish_declspecs): For diagnostics, use the location of the
	relevant declspec, instead of the global input_location.
	* c-parser.c (c_parser_parameter_declaration): Pass the precise
	virtual location of the declspec to the declspecs-setters.
	(c_parser_declspecs): Likewise.  Avoid calling c_parser_peek_token
	repeatedly.

gcc/cp/

	PR preprocessor/7263
	* cp-tree.h (enum cp_decl_spec): Add new enumerators to cover all
	the possible declarator specifiers so far.
	(struct cp_decl_specifier_seq::locations): Declare new member.
	(cp_decl_specifier_seq::{specs, type_location}): Remove.
	(decl_spec_seq_has_spec_p): Declare new function.
	* parser.c (cp_parser_check_decl_spec): Remove.
	(set_and_check_decl_spec_loc): Define new static function.
	(decl_spec_seq_has_spec_p): Define new public function.
	(cp_parser_decl_specifier_seq, cp_parser_function_specifier_opt)
	(cp_parser_type_specifier, cp_parser_simple_type_specifier)
	(cp_parser_set_storage_class, cp_parser_set_decl_spec_type)
	(cp_parser_alias_declaration): Set the locations for each
	declspec, using set_and_check_decl_spec_loc.
	(cp_parser_explicit_instantiation, cp_parser_init_declarator)
	(cp_parser_member_declaration, cp_parser_init_declarator): Use the
	new declspec location for specifiers.  Use the new
	decl_spec_seq_has_spec_p.
	(cp_parser_type_specifier_seq): Use the new
	set_and_check_decl_spec_loc.  Stop using
	cp_parser_check_decl_spec.  Use the new decl_spec_seq_has_spec_p.
	(, cp_parser_init_declarator): Use the new
	set_and_check_decl_spec_loc.
	(cp_parser_single_declaration, cp_parser_friend_p)
	(cp_parser_objc_class_ivars, cp_parser_objc_struct_declaration):
	Use the new decl_spec_seq_has_spec_p.
	* decl.c (check_tag_decl): Use new decl_spec_seq_has_spec_p.  Use
	the more precise ds_redefined_builtin_type_spec location for
	diagnostics about re-declaring C++ built-in types.
	(start_decl, grokvardecl, grokdeclarator): Use the new
	decl_spec_seq_has_spec_p.

gcc/testsuite/

	PR preprocessor/7263
	* gcc.dg/binary-constants-2.c: Run without tracking locations
	accross macro expansion.
	* gcc.dg/binary-constants-3.c: Likewise.
	* gcc.dg/cpp/sysmac2.c: Likewise.
	* testsuite/gcc.dg/nofixed-point-2.c: Adjust for more precise
	location.
	* gcc.dg/cpp/syshdr3.c: New test.
	* gcc.dg/cpp/syshdr3.h: New header for the new test above.
	* gcc.dg/system-binary-constants-1.c: New test.
	* gcc.dg/system-binary-constants-1.h: New header for the new test
	above.
	* g++.dg/cpp/syshdr3.C: New test.
	* g++.dg/cpp/syshdr3.h: New header the new test above.
	* g++.dg/system-binary-constants-1.C: New test.
	* g++.dg/system-binary-constants-1.h: New header the new test
	above.

From-SVN: r187587
 2012-05-16 12:51:15 +02:00
Tristan Gingold
638d20652b expr.c (interpret_float_suffix): Add a guard. 
2012-05-10  Tristan Gingold  <gingold@adacore.com>

	* expr.c (interpret_float_suffix): Add a guard.

From-SVN: r187364
 2012-05-10 08:04:18 +00:00
Dodji Seketeli
3ad64f53da Properly initialize cpp_context in destringize_and_run 
destringize_and_run forgets to initialize all the fields of the
cpp_context that it pushes.  Later _cpp_pop_context then gets confused
when it accesses context->tokens_kind via the call to macro_of_context
on context->prev.

The first hunk of this patch is the real obvious fix.  The second hunk
is just an assert that I am adding to err on the safe side.

Tested by on x86_64-unknown-linux-gnu against trunk by running the
test gcc.dg/gomp/macro-4.c under Valgrind, and bootstrapped.

libcpp/

	* directives.c (destringize_and_run): Properly initialize the new
	context.
	* macro.c (_cpp_pop_context): Assert that we shouldn't try to pop
	the initial base context, which has the same life time as the
	current instance of cpp_file.

From-SVN: r187054
 2012-05-02 18:55:19 +02:00
Manuel López-Ibáñez
3efc29598a * libcpp/ChangeLog: Fix PR number. 
From-SVN: r186992
 2012-04-30 17:03:02 +00:00
Manuel López-Ibáñez
b193dfa899 re PR c++/52974 (Canonicalize include paths in diagnostics) 
2012-04-30  Manuel López-Ibáñez  <manu@gcc.gnu.org>
	    Dodji Seketeli  <dodji@seketeli.org>

	PR c++/52974
	* libcpp/files.c (maybe_shorter_path): New.
	(find_file_in_dir): Use it.

Co-Authored-By: Dodji Seketeli <dodji@seketeli.org>

From-SVN: r186991
 2012-04-30 16:57:22 +00:00
Dodji Seketeli
51fce2d396 Switch -ftrack-macro-expansion=2 on by default. 
This switches the compiler to -ftrack-macro-expansion=2 by default.

Tested and bootstrapped on x86_64-unknown-linux-gnu against trunk.

libcpp/

	* init.c (cpp_create_reader): Switch -ftrack-macro-expansion=2 on
	by default.  Add comments.

gcc/docs/

	* cppopts.texi: Adjust for enabling -ftrack-macro-expansion=2 by
	default.

From-SVN: r186977
 2012-04-30 13:43:43 +02:00
Dodji Seketeli
c4ca1a0961 Strip "<built-in>" loc from displayed expansion context 
Now that diagnostics for tokens coming from macro expansions point to
the spelling location of the relevant token (and then displays the
context of the expansion), some ugly (not so seldom) corner cases can
happen.

When the relevant token is a built-in token (which means the location
of that token is BUILTINS_LOCATION) the location prefix displayed to
the user in the diagnostic line is the "<built-in>:0:0" string.  For
instance:

    <built-in>:0:0: warning: conversion to 'float' alters 'int' constant value

For the user, I think this is surprising and useless.

A more user-friendly approach would be to refer to the first location
that (in the reported macro expansion context) is for a location in
real source code, like what is shown in the new test case
gcc/testsuite/g++.dg/warn/Wconversion-real-integer2.C accompanying
this patch.

To do this, I am making the line-map module provide a new
linemap_unwind_to_first_non_reserved_loc function that resolves a
virtual location to the first spelling location that is in real source
code.

I am then using that facility in the diagnostics printing module and
in the macro unwinder to avoid printing diagnostics lines that refer
to the locations for built-ins or more generally for reserved
locations.  Note that when I start the dance of skipping a built-in
location I also skip locations that are in system headers, because it
turned out that a lot of those built-ins are actually used in system
headers (e.g, "#define INT_MAX __INT_MAX__" where __INT_MAX__ is a
built-in).

Besides the user-friendliness gain, this patch allows a number of
regression tests to PASS unchanged with and without
-ftrack-macro-expansion.

Tested and bootstrapped on x86_64-unknown-linux-gnu against trunk.

Note that the bootstrap with -ftrack-macro-expansion exhibits other
separate issues that are addressed in subsequent patches.  This patch
just fixes one class of problems.

The patch does pass bootstrap with -ftrack-macro-expansion turned off,
though.

libcpp/

	* include/line-map.h (linemap_unwind_toward_expansion): Fix typo
	in comment.
	(linemap_unwind_to_first_non_reserved_loc): Declare new function.
	* line-map.c (linemap_unwind_to_first_non_reserved_loc): Define
	new function.

gcc/

	* input.c (expand_location_1): When expanding to spelling location
	in a context of a macro expansion, skip reserved system header
	locations.  Update comments.  * tree-diagnostic.c
	(maybe_unwind_expanded_macro_loc): Likewise.

gcc/testsuite/

	* g++.dg/warn/Wconversion-real-integer2.C: New test.
	* g++.dg/warn/Wconversion-real-integer-3.C: Likewise.
	* g++.dg/warn/conversion-real-integer-3.h: New header used by the
	new test above.

From-SVN: r186970
 2012-04-30 13:42:12 +02:00
Dodji Seketeli
3600218c8b Fix expansion point loc for macro-like tokens 
Consider the test case gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c.
Its interesting part is:

    #define A(x) vari x /* line 7.  */
    #define vari(x)
    #define B , varj
    int A(B) ;  /* line 10.  */

In its initial version, this test was being pre-processed as:

    # 1 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
    # 1 "build/gcc//"
    # 1 "<command-line>"
    # 1 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
    # 10 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
    int
    # 7 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
		 vari

	, varj ;

Note how "int" and "vari" are on separate lines, whereas "int" and
", varj" are on the same line.

This looks like a bug to me, even independantly from the macro
location tracking work.

With macro location tracking turned on, the preprocessed output
becomes:

    # 1 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
    # 1 "<command-line>"
    # 1 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
    # 10 "gcc/testsuite/gcc.dg/debug/dwarf2/pr41445-5.c"
    int vari , varj ;

Which, IMO, is what we'd expect.

This is due to an unexpected side effect of enter_macro_context when
passed a token that might look like a function-like macro at first
sight, but that it eventually considers to not be a macro after all.

This is the case for the "vari" token which looks like a macro when it
is first lexed, but is eventually considered to be a normal token by
enter_macro_context because it's not used as a function-like macro
invocation.

In that case, besides returning NULL, enter_macro_context sets
pfile->context->c.macro to NULL, making cpp_get_token_1 forget to set
the location of the "vari" to the expansion point of A.

enter_macro_context sets pfile->context->c.macro to NULL in that case
because funlike_invocation_p reads one token pass "foo", sees that
there is no '(' token, so we are not invoking the function-like
parameter.  It then puts the tokens (which it has read after "foo")
back into the tokens stream by calling _cpp_push_token_context on it,
which sets pfile->context->c.macro to NULL, saying in essence that the
current macro expansion context is "stopped".

The fix here is to teach _cpp_push_token and
push_extended_tokens_context to continue the current macro context
when passed a NULL macro.  But then, now that there can be several
continguous contexts associated with the same macro, we need to teach
_cpp_pop_context to re-enable the expansion of the current macro only
when we are really out of expanding the current macro.  Otherwise we
can run in cases where we have recursive expansions of the same macro.

Tested on x86_64-unknown-linux-gnu against trunk.  Now this test has
the same output with and without tracking locations accross macro
expansions.

Note that the bootstrap with -ftrack-macro-expansion exhibits other
separate issues that are addressed in subsequent patches.  This patch
just fixes one class of problems.

The patch does pass bootstrap with -ftrack-macro-expansion turned off,
though.

libcpp/
	* macro.c (macro_of_context): New static function.
	(_cpp_push_token_context, push_extended_tokens_context): If the
	macro argument is NULL, it means we are continuing the expansion
	of the current macro, if any.  Update comments.
	(_cpp_pop_context): Re-enable expansion of the macro only when we
	are really out of the context of the current expansion.

gcc/testsuite/

	* gcc.dg/debug/dwarf2/pr41445-5.c: Adjust.
	* gcc.dg/debug/dwarf2/pr41445-6.c: Likewise.

From-SVN: r186968
 2012-04-30 13:41:46 +02:00
Dodji Seketeli
0ff2b8a022 Fix token pasting with -ftrack-macro-expansion 
This patch makes token pasting work with -ftrack-macro-expansion
turned on.  It improves some pasting related tests of the gcc.dg/cpp
subdirectory.

Tested and bootstrapped on x86_64-unknown-linux-gnu against trunk.

Note that the bootstrap with -ftrack-macro-expansion exhibits other
separate issues that are addressed in subsequent patches.  This patch
just fixes one class of problems.

The patch does pass bootstrap with -ftrack-macro-expansion turned off,
though.

libcpp/

	* macro.c (paste_all_tokens): Put the token resulting from pasting
	into an extended token context with -ftrack-macro-location is in
	effect.

gcc/testsuite/

	* gcc.dg/cpp/paste17.c: New test case for
	-ftrack-macro-expansion=2 mode only.
	* gcc.dg/cpp/macro-exp-tracking-5.c: Likewise.

From-SVN: r186966
 2012-04-30 13:41:21 +02:00
Dodji Seketeli
4e65a47055 Fix cpp_sys_macro_p with -ftrack-macro-expansion 
cpp_sys_macro_p crashes when -ftrack-macro-expansion is on.  The issue
can be reproduced by running the tests:

    runtest --tool gcc --tool_opts="-ftrack-macro-expansion" cpp.exp=sysmac1.c
    runtest --tool gcc --tool_opts="-ftrack-macro-expansion" cpp.exp=sysmac2.c

This is because it just doesn't support that mode.  Fixed thus.
Tested and bootstrapped on x86_64-unknown-linux-gnu against trunk.

Note that the bootstrap with -ftrack-macro-expansion turned on
exhibits other separate issues that are addressed in subsequent
patches.  This patch just fixes one class of problems.

The patch does pass bootstrap with -ftrack-macro-expansion turned off,
though.

libcpp/

	* macro.c (cpp_sys_macro_p):  Support -ftrack-macro-expansion.

From-SVN: r186965
 2012-04-30 13:41:08 +02:00
Dodji Seketeli
112448b448 Don't use C++ style comments in libcpp 
I noticed that the file lex.c had C++ style comments, which I believe
is against the coding standards of the project.

Fixed, tested and applied to master as per the obvious rule.

libcpp/

	* lex.c (lex_raw_string): Change C++ style comments into C
	style comments.
	(lex_string): Likewise.

From-SVN: r186946
 2012-04-29 18:27:08 +02:00
Ollie Wild
7f5f5f98c5 Add new option, -Wliteral-suffix. 
This option, which is enabled by default, causes the preprocessor to warn
when a string or character literal is followed by a ud-suffix which does
not begin with an underscore.  According to [lex.ext]p10, this is
ill-formed.

Also modifies the preprocessor to treat such ill-formed suffixes as separate
preprocessing tokens.  This is consistent with the Clang front end (see
http://llvm.org/viewvc/llvm-project?view=rev&revision=152287), and enables
backwards compatibility with code that uses formatting macros from
<inttypes.h>, as in the following code block:

  int main() {
    int64_t i64 = 123;
    printf("My int64: %"PRId64"\n", i64);
  }

Google ref b/6377711.

2012-04-27   Ollie Wild  <aaw@google.com>

	PR c++/52538
	* gcc/c-family/c-common.c: Add CPP_W_LITERAL_SUFFIX mapping.
	* gcc/c-family/c-opts.c (c_common_handle_option): Handle
	OPT_Wliteral_suffix.
	* gcc/c-family/c.opt: Add Wliteral-suffix.
	* gcc/doc/invoke.texi (Wliteral-suffix): Document new option.
	* gcc/testsuite/g++.dg/cpp0x/Wliteral-suffix.c: New test.
	* libcpp/include/cpplib.h (struct cpp_options): Add new field,
	warn_literal_suffix.
	(CPP_W_LITERAL_SUFFIX): New enum.
	* libcpp/init.c (cpp_create_reader): Default initialization of
	warn_literal_suffix.
	* libcpp/lex.c (lex_raw_string): Treat user-defined literals which
	don't begin with '_' as separate tokens and produce a warning.
	(lex_string): Ditto.

From-SVN: r186909
 2012-04-27 14:29:32 +00:00
Manuel López-Ibáñez
1d72e96f53 tree-diagnostic.c (maybe_unwind_expanded_macro_loc): Fix comment. 
2012-04-26  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	* tree-diagnostic.c (maybe_unwind_expanded_macro_loc): Fix
	comment. Delete unused parameter first_exp_point_map.
	(virt_loc_aware_diagnostic_finalizer): Update call.
libcpp/
	* line-map.c (linemap_resolve_location): Synchronize comments with
	those in line-map.h.
	* include/line-map.h (linemap_resolve_location): Fix spelling in
	comment.

From-SVN: r186860
 2012-04-26 07:14:01 +00:00
Richard Earnshaw
e75b54a2d9 * lex.c (search_line_fast): Provide Neon-optimized version for ARM. 
From-SVN: r185702
 2012-03-22 17:54:55 +00:00
Rainer Orth
7888f2660e Remove obsolete Solaris 8 support 
libstdc++-v3:
	* config/os/solaris/solaris2.8: Rename to ...
	* config/os/solaris/solaris2.9: ... this.
	* config/abi/post/solaris2.8: Rename to ...
	* config/abi/post/solaris2.9: ... this.
	* configure.host (os_include_dir): Remove solaris2.8.
	Reflect renaming.
	(abi_baseline_pair): Remove *-*-solaris2.8.
	Reflect renaming.

	* configure.ac (GLIBCXX_CHECK_MATH_PROTO): Remove
	(GLIBCXX_CHECK_STDLIB_PROTO): Remove.
	* acinclude.m4 (GLIBCXX_CHECK_MATH_PROTO): Remove
	(GLIBCXX_CHECK_STDLIB_PROTO): Remove.
	(GLIBCXX_CHECK_GTHREADS): Remove Solaris 8 handling.
	* crossconfig.m4 (GLIBCXX_CROSSCONFIG): Remove *-solaris2.8
	handling.
	* configure: Regenerate.
	* config.h.in: Regenerate.

	* config/os/solaris/solaris2.9/os_defines.h
	(__CORRECT_ISO_CPP_MATH_H_PROTO): Define.
	(__CORRECT_ISO_CPP_STDLIB_H_PROTO): Define.
	* include/c_global/cmath: Rename __CORRECT_ISO_CPP_MATH_H_PROTO1
	to __CORRECT_ISO_CPP_MATH_H_PROTO.
	[!__CORRECT_ISO_CPP_MATH_H_PROTO2]: Remove.
	* include/tr1/cmath: Rename __CORRECT_ISO_CPP_MATH_H_PROTO1 to
	__CORRECT_ISO_CPP_MATH_H_PROTO.

	* doc/xml/manual/configure.xml (Configure, --enable-libstdcxx-threads):
	Remove Solaris 8 reference.

	* testsuite/27_io/basic_istream/extractors_arithmetic/char/12.cc:
	Don't xfail on *-*-solaris2.8.
	* testsuite/27_io/basic_istream/extractors_arithmetic/wchar_t/12.cc:
	Likewise.
	* testsuite/ext/enc_filebuf/char/13598.cc: Don't xfail on
	*-*-solaris2.8.

	libjava:
	* configure.ac (THREADLIBS): Remove *-*-solaris2.8 handling.
	* configure: Regenerate.

	libgcc:
	* config/i386/sol2-unwind.h (x86_fallback_frame_state): Remove
	Solaris 8 handling.
	* config/sparc/sol2-unwind.h (sparc64_is_sighandler): Remove
	Solaris 8 handling.
	(sparc_is_sighandler): Likewise.

	libcpp:
	* lex.c: Remove Solaris 8 reference.

	gcc/testsuite:
	* g++.dg/warn/miss-format-1.C: Remove *-*-solaris2.8 handling.
	* gcc.dg/c99-stdint-6.c: Likewise.
	* gcc.dg/lto/20090210_0.c: Likewise.
	* gcc.dg/pr28796-2.c: Don't skip on sparc*-sun-solaris2.8.
	* gcc.dg/pragma-init-fini.c: Don't skip on i?86-*-solaris2.8.
	* gcc.dg/pragma-init-fini-2.c: Likewise.
	* gcc.dg/torture/pr47917.c: Remove *-*-solaris2.8 handling.
	* gcc.target/i386/pr22076.c: Remove i?86-*-solaris2.8 handling.
	* gcc.target/i386/pr22152.c: Likewise.
	* gcc.target/i386/vect8-ret.c: Likewise.
	* lib/target-supports.exp (add_options_for_tls): Remove Solaris 8
	handling.

	gcc:
	* config.gcc (enable_obsolete): Remove *-*-solaris2.8*.
	(*-*-solaris2.[0-8], *-*-solaris2.[0-8].*): Mark unsupported.
	(i[34567]86-*-solaris2*, x86_64-*-solaris2.1[0-9]*): Remove
	Solaris 8 support.
	* configure.ac (gcc_cv_ld_hidden): Remove *-*-solaris2.8*.
	(ld_tls_support): Remove Solaris 8 references.
	(lwp_dir, lwp_spec): Remove support for alternate thread library.
	* acinclude.m4 (gcc_cv_initfini_array): Remove *-*-solaris2.*
	tests.
	* configure: Regenerate.
	* config.in: Regenerate.

	* config/sol2.h (LINK_SPEC): Remove LIB_THREAD_LDFLAGS_SPEC.
	* config/i386/sol2.h: Remove Solaris 8 references.

	* doc/install.texi (Specific, i?86-*-solaris2.[89]): Rename to ...
	(i?86-*-solaris2.9): ... this.
	Remove Solaris 8 references.
	(Specific, *-*-solaris2*): Document Solaris 8 removal.
	Remove Solaris 8 references.

	fixincludes:
	* inclhack.def (math_exception): Remove duplicate.
	(solaris_cond_init): Remove.
	(solaris_sys_va_list): Remove Solaris 8 support.
	* fixincl.x: Regenerate.
	* tests/base/pthread.h [SOLARIS_COND_INIT_CHECK]: Remove.

From-SVN: r185392
 2012-03-14 17:08:03 +00:00
Walter Lee
dd552284fd Add ports for TILE-Gx and TILEPro. 
.
	* MAINTAINERS (tilegx port): Add myself.
	(tilepro port): Add myself.

contrib
	* config-list.mk (LIST): Add tilegx-linux-gnu and
	tilepro-linux-gnu.
	* gcc_update (gcc/config/tilegx/mul-tables.c): New dependencies.
	(gcc/config/tilepro/mul-tables.c): New dependencies.

gcc
	* config.gcc: Handle tilegx and tilepro.
	* configure.ac (gcc_cv_as_dwarf2_debug_line): Enable test for
	tilegx and tilepro.
	Add HAVE_AS_TLS check for tilegx and tilepro.
	* configure: Regenerate.
	* doc/contrib.texi: Add Mat Hostetter and self.
	* doc/extend.texi (TILE-Gx Built-in Functions): New node.
	Document instruction intrinsics and network accessing intrinsics.
	(TILEPro Built-in Functions): New node.	 Document instruction
	intrinsics and network accessing intrinsics.
	* doc/install.texi (Specific, tilegx-*-linux*): Document it.
	(Specific, tilepro-*-linux*): Likewise.
	* doc/invoke.texi (TILE-Gx Options): New section.
	(TILEPro Options): New section.
	* doc/md.texi (TILE-Gx): New section.
	(TILEPro): New section.
	* common/config/tilegx: New directory for tilegx.
	* common/config/tilepro: New directory for tilepro.
	* config/tilegx: New directory for tilegx.
	* config/tilepro: New directory for tilepro.

gcc/testsuite
	* g++.dg/other/PR23205.C: Disable test on tile.
	* g++.dg/other/pr23205-2.C: Disable test on tile.
	* gcc.dg/20020312-2.c: Add a condition for __tile__.
	* gcc.dg/20040813-1.c: Disable test on tile.
	* gcc.dg/lower-subreg-1.c: Disable test on tilegx.
	* gcc.misc-tests/linkage.exp: Handle tilegx.

libcpp
	* configure.ac: Require 64-bit hwint for tilegx and tilepro.
	* configure: Regenerate.

libgcc
	* config.host: Handle tilegx and tilepro.
	* config/tilegx: New directory for tilegx.
	* config/tilepro: New directory for tilepro.

libgomp
	* configure.tgt: Handle tilegx and tilepro.
	* config/linux/tile: New directory for tilegx and tilepro.

Added:
     trunk/gcc/common/config/tilegx/tilegx-common.c
     trunk/gcc/common/config/tilepro/tilepro-common.c
     trunk/gcc/config/tilegx/constraints.md
     trunk/gcc/config/tilegx/linux.h
     trunk/gcc/config/tilegx/mul-tables.c
     trunk/gcc/config/tilegx/predicates.md
     trunk/gcc/config/tilegx/sync.md
     trunk/gcc/config/tilegx/t-tilegx
     trunk/gcc/config/tilegx/tilegx-builtins.h
     trunk/gcc/config/tilegx/tilegx-c.c
     trunk/gcc/config/tilegx/tilegx-generic.md
     trunk/gcc/config/tilegx/tilegx-modes.def
     trunk/gcc/config/tilegx/tilegx-multiply.h
     trunk/gcc/config/tilegx/tilegx-protos.h
     trunk/gcc/config/tilegx/tilegx.c
     trunk/gcc/config/tilegx/tilegx.h
     trunk/gcc/config/tilegx/tilegx.md
     trunk/gcc/config/tilegx/tilegx.opt
     trunk/gcc/config/tilepro/constraints.md
     trunk/gcc/config/tilepro/gen-mul-tables.cc
     trunk/gcc/config/tilepro/linux.h
     trunk/gcc/config/tilepro/mul-tables.c
     trunk/gcc/config/tilepro/predicates.md
     trunk/gcc/config/tilepro/t-tilepro
     trunk/gcc/config/tilepro/tilepro-builtins.h
     trunk/gcc/config/tilepro/tilepro-c.c
     trunk/gcc/config/tilepro/tilepro-generic.md
     trunk/gcc/config/tilepro/tilepro-modes.def
     trunk/gcc/config/tilepro/tilepro-multiply.h
     trunk/gcc/config/tilepro/tilepro-protos.h
     trunk/gcc/config/tilepro/tilepro.c
     trunk/gcc/config/tilepro/tilepro.h
     trunk/gcc/config/tilepro/tilepro.md
     trunk/gcc/config/tilepro/tilepro.opt
     trunk/libgcc/config/tilegx/sfp-machine.h
     trunk/libgcc/config/tilegx/sfp-machine32.h
     trunk/libgcc/config/tilegx/sfp-machine64.h
     trunk/libgcc/config/tilegx/t-crtstuff
     trunk/libgcc/config/tilegx/t-softfp
     trunk/libgcc/config/tilegx/t-tilegx
     trunk/libgcc/config/tilepro/atomic.c
     trunk/libgcc/config/tilepro/atomic.h
     trunk/libgcc/config/tilepro/linux-unwind.h
     trunk/libgcc/config/tilepro/sfp-machine.h
     trunk/libgcc/config/tilepro/softdivide.c
     trunk/libgcc/config/tilepro/softmpy.S
     trunk/libgcc/config/tilepro/t-crtstuff
     trunk/libgcc/config/tilepro/t-tilepro
     trunk/libgomp/config/linux/tile/futex.h
Modified:
     trunk/MAINTAINERS
     trunk/contrib/config-list.mk
     trunk/contrib/gcc_update
     trunk/gcc/config.gcc
     trunk/gcc/configure
     trunk/gcc/configure.ac
     trunk/gcc/doc/contrib.texi
     trunk/gcc/doc/extend.texi
     trunk/gcc/doc/install.texi
     trunk/gcc/doc/invoke.texi
     trunk/gcc/doc/md.texi
     trunk/gcc/testsuite/g++.dg/other/PR23205.C
     trunk/gcc/testsuite/g++.dg/other/pr23205-2.C
     trunk/gcc/testsuite/gcc.dg/20020312-2.c
     trunk/gcc/testsuite/gcc.dg/20040813-1.c
     trunk/gcc/testsuite/gcc.dg/lower-subreg-1.c
     trunk/gcc/testsuite/gcc.misc-tests/linkage.exp
     trunk/libcpp/configure
     trunk/libcpp/configure.ac
     trunk/libgcc/config.host
     trunk/libgomp/configure.tgt

From-SVN: r184203
 2012-02-14 10:02:21 +00:00
Richard Guenther
2c5cbc315f macro.c (_cpp_builtin_macro_text): Remove unused variable map. 
2012-01-09  Richard Guenther  <rguenther@suse.de>

	* macro.c (_cpp_builtin_macro_text): Remove unused variable map.

From-SVN: r183013
 2012-01-09 14:15:25 +00:00
Gary Funck
b492b6862e re PR preprocessor/33919 (__BASE_FILE__ does not expand correctly when included from the command line) 
libcpp/
	PR preprocessor/33919
	* files.c (_cpp_get_file_name): New. Implement file name
	access function.
	* internal.h (_cpp_get_file_name): New prototype.
	* macro.c (_cpp_builtin_macro_text): Call _cpp_get_file_name()
	to use pfile->main_file in lieu of traversing INCLUDED_FROM chain.

gcc/testsuite/
	PR preprocessor/33919
	* gcc.dg/pr33919.c: New test.
	* gcc.dg/pr33919-0.h: New test header file.
	* gcc.dg/pr33919-1.h: Ditto.
	* gcc.dg/pr33919-2.h: Ditto.

From-SVN: r183003
 2012-01-09 08:48:43 +00:00
Olivier Hainque
75291c57b9 system.h: Prior to #define, #undef fopen and freopen unconditionally. 
gcc/
        * system.h: Prior to #define, #undef fopen and freopen unconditionally.

libcpp/
        * system.h: Likewise.

From-SVN: r182837
 2012-01-03 11:44:34 +00:00