* lang.opt: Add -fgo-check-divide-zero and
	-fgo-check-divide-overflow.
	* gccgo.texi (Invoking gccgo): Document new options.

From-SVN: r186637

Avoids bug in strace 4.5.20 on powerpc-unknown-linux-gnu.

From-SVN: r186635

This fixes the lookup when, e.g., discriminators force adding
new line arrays.

From-SVN: r186633

From-SVN: r186631

	* gcc.target/x86_64/abi/avx/test_passing_unions.c: Avoid undefined
	array access.
	* gcc.target/x86_64/abi/avx/test_passing_structs.c: Likewise.

From-SVN: r186629

* genmodes.c (make_complex_modes): Don't truncate a mode name of
length 7 or more when prepending a "C".  Suggested by Richard Guenther.

From-SVN: r186628

	PR target/53042
	* decl2.c (maybe_emit_vtables): Do not initialize same_comdat_group
	list when target has no support for it.

From-SVN: r186627

	* error.c (pedwarn_cxx98): Move va_end call after user
	of the va_list.

From-SVN: r186626

re PR rtl-optimization/44214 (Compiler does not optimize vector divide with -freciprocal-math (or -ffast-math))

gcc:

2012-04-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR rtl-optimization/44214
	* fold-const.c (exact_inverse): New function.
	(fold_binary_loc): Fold vector and complex division by constant into
	multiply by recripocal with flag_reciprocal_math; fold vector division
	by constant into multiply by reciprocal with exact inverse.

gcc/testsuite:

2012-04-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR rtl-optimization/44214
	* gcc.dg/pr44214-1.c: New test.
	* gcc.dg/pr44214-2.c: Likewise.
	* gcc.dg/pr44214-3.c: Likewise.

From-SVN: r186625

	* lto-symtab.c (lto_cgraph_replace_node): Merge needed instead of force flags.
	* cgraph.c (cgraph_add_thunk): Use mark_reachable_node.
	(cgraph_remove_node): Update.
	(cgraph_mark_needed_node): Remove.
	(cgraph_mark_force_output_node): New.
	(dump_cgraph_node): Do not dump needed flag.
	(cgraph_node_cannot_be_local_p_1): Update.
	(cgraph_can_remove_if_no_direct_calls_and_refs): Update.
	* cgraph.h (symtab_node_base): Add force_output flag.
	(cgraph_node): Remove needed flag.
	(varpool_node): Remove force_output flag.
	(cgraph_mark_needed_node): Remove.
	(cgraph_mark_force_output_node): New.
	(cgraph_only_called_directly_or_aliased_p,
	varpool_can_remove_if_no_refs, varpool_all_refs_explicit_p): Update.
	* ipa-cp.c (ipcp_generate_summary): Remove out of date assert.
	* cgraphunit.c (cgraph_decide_is_function_needed): rewrite.
	(cgraph_add_new_function); Update.
	(cgraph_mark_if_needed); Update.
	(verify_cgraph_node): Update.
	(cgraph_analyze_function): Alias target is reachable.
	(process_function_and_variable_attributes): Update: externally_visible
	flag makes function reachable.
	(cgraph_analyze_functions): Update dumping.
	* lto-cgraph.c (lto_output_node, lto_output_varpool_node,
	input_overwrite_node, input_varpool_node): Update streaming.
	* lto-streamer-out.c (produce_symtab): Use force_output.
	* ipa.c (process_references): Weakrefs must be processed.
	(cgraph_remove_unreachable_nodes): Likewise; update for new
	force_output flag.
	(varpool_externally_visible_p); Weakrefs are externally visible
	even if they are not.
	(function_and_variable_visibility): Update; when processing alias
	pair force the targets to be output.
	(whole_program_function_and_variable_visility): Use mark_reachable_node.
	* trans-mem.c (ipa_tm_mark_needed_node): Remove
	(ipa_tm_mark_force_output_node): New function.
	(ipa_tm_create_version_alias, ipa_tm_create_version): Update.
	* gimple-fold.c (can_refer_decl_in_current_unit_p): Be lax about aliases.
	* varasm.c (mark_decl_referenced): Update.
	(find_decl_and_mark_needed): Remove.
	(find_decl): New function.
	(weak_finish, finish_aliases_1, assemble_alias): Update; do not mark
	alias targets as needed.
	(dump_tm_clone_pairs): Update.
	* tree-inline.c (copy_bb): Update check.
	* symtab.c (dump_symtab_base): Dump force_output.
	* tree-ssa-structalias.c (ipa_pta_execute): Use force_output.
	* passes.c (execute_todo): Fix dumping.
	* varpool.c (decide_is_variable_needed, varpool_finalize_decl): Update.
	(varpool_analyze_pending_decls): Alias target is reachable.
	(varpool_create_variable_alias): Finalize weakrefs.

	* class.c (make_local_function_alias): Do not mark symbol referenced.

	* objc-acct.c (mark_referenced_methods); Use
	cgraph_mark_force_output_node.

	* gcc-interface/utils.c (gnat_write_global_declarations): Update for new
	force_output placement.

	* lto/lto-partition.c (partition_cgraph_node_p): Use force_output.

From-SVN: r186624

	PR bootstrap/53021
	* alias.h (UNIQUE_BASE_VALUE_SP, UNIQUE_BASE_VALUE_ARGP,
	UNIQUE_BASE_VALUE_FP, UNIQUE_BASE_VALUE_HFP): Define.
	* alias.c (init_alias_targets): Use UNIQUE_BASE_VALUE_*
	macros instead of constants.
	* dse.c (record_store): Check for SP ADDRESS by comparing
	XWINT to UNIQUE_BASE_VALUE_SP instead of expecting
	XEXP to be stack_pointer_rtx.

From-SVN: r186623

tree-ssa-copy.c (propagate_tree_value_into_stmt): Use update_call_from_tree when propagating into a call.

2012-04-20  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-copy.c (propagate_tree_value_into_stmt): Use
	update_call_from_tree when propagating into a call.

	* g++.dg/torture/20120420-1.C: New testcase.

From-SVN: r186622

	* config/rs6000/rs6000.c (rs6000_emit_savres_rtx): Formatting.
	(rs6000_emit_prologue, rs6000_emit_epilogue): Likewise.  Rename
	sp_offset to frame_off.  Move world save code earlier.

From-SVN: r186621

2012-04-20  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/53050
	* tree-ssa-forwprop.c (ssa_forward_propagate_and_combine):
	Do only one transform on COND_EXPRs at the same time.

From-SVN: r186620

From-SVN: r186619

2012-04-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/53052
	* include/std/type_traits (is_explicitly_convertible): Remove.
	* testsuite/20_util/is_explicitly_convertible: Likewise.
	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc:
	Adjust dg-error line numbers.
	* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
	Likewise.
	* testsuite/20_util/declval/requirements/1_neg.cc: Likewise.

From-SVN: r186618

2012-04-20  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/53052
	* include/std/type_traits (is_explicitly_convertible): Remove.
	* testsuite/20_util/is_explicitly_convertible: Likewise.
	* testsuite/20_util/make_signed/requirements/typedefs_neg.cc:
	Adjust dg-error line numbers.
	* testsuite/20_util/make_unsigned/requirements/typedefs_neg.cc:
	Likewise.
	* testsuite/20_util/declval/requirements/1_neg.cc: Likewise.

From-SVN: r186617

	PR target/53040
	* config/rs6000/rs6000.c (rs6000_savres_strategy): When using
	static chain, set REST_INLINE_FPRS too.

From-SVN: r186616

gcc/
	* tree-dump.c (dequeue_and_dump) <BIT_FIELD_REF>: Dump the three child
	nodes.

From-SVN: r186615

tree-vect-loop.c (vect_analyze_loop_operations): Do not vectorize loops that can never run more often than the vectorization factor.

2012-04-20  Richard Guenther  <rguenther@suse.de>

	* tree-vect-loop.c (vect_analyze_loop_operations): Do not
	vectorize loops that can never run more often than the
	vectorization factor.

From-SVN: r186614

libgcc/
	* config/alpha/linux-unwind.h (alpha_fallback_frame_state): Use
	siginfo_t instead of struct siginfo.
	* config/bfin/linux-unwind.h (bfin_fallback_frame_state): Likewise.
	* config/i386/linux-unwind.h (x86_fallback_frame_state): Likewise.
	* config/ia64/linux-unwind.h (ia64_fallback_frame_state)
	(ia64_handle_unwabi): Likewise.
	* config/mips/linux-unwind.h (mips_fallback_frame_state): Likewise.
	* config/pa/linux-unwind.h (pa32_fallback_frame_state): Likewise.
	* config/sh/linux-unwind.h (shmedia_fallback_frame_state)
	(sh_fallback_frame_state): Likewise.
	* config/tilepro/linux-unwind.h (tile_fallback_frame_state): Likewise.
	* config/xtensa/linux-unwind.h (xtensa_fallback_frame_state): Likewise.

From-SVN: r186610

From-SVN: r186609

Also allocate heap bitmaps bit in page size units and clear
context when putting G structures on free list.

From-SVN: r186607

From-SVN: r186605

From-SVN: r186604

From-SVN: r186600

From-SVN: r186599

From-SVN: r186597

* genmodes.c (make_complex_modes): Avoid unnecessary use of strncpy.
We verified above that the string(including trailing NUL) fits in buf,
so just use memcpy.

From-SVN: r186596

2012-04-19  Richard Guenther  <rguenther@suse.de>

	* symtab.c (dump_symtab_base): Use TREE_STRING_POINTER
	for dumping DECL_SECTION_NAME.

From-SVN: r186594

re PR c/52977 (internal compiler error: Segmentation fault with `-x c-header' or `-x cxx-header' option)

	PR middle-end/52977
	* tree.h (VECTOR_CST_NELTS): Use part number of types again.
	(struct tree_vector): Adjust GTY length.
	* tree.c (make_vector_stat): Don't set VECTOR_CST_NELTS.

	* gengtype.c (struct walk_type_data): Add in_record_p and loopcounter
	members.
	(walk_type, <TYPE_POINTER, TYPE_ARRAY>): Handle case where our
	caller emitted the length calulation already.
	(walk_type, <TYPE_UNION, TYPE_STRUCT>): Emit length calculations

From-SVN: r186593

2012-04-19  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/53031
	* tree-vrp.c (adjust_range_with_scev): Revert back to
	using max_loop_iterations.

From-SVN: r186592

	* diagnostic.c (emit_diagnostic): Move va_end call after user
	of the va_list.
	(warning, warning_at, pedwarn, permerror): Ditto.

From-SVN: r186591

2012-04-19  Richard Guenther  <rguenther@suse.de>

	* ira-int.h (ira_allocno_object_iter_cond): Avoid out-of-bound
	array access.

From-SVN: r186590

	PR target/53033
	* config/avr/avr.c (avr_out_load_psi): Fix assembler template for
	the case *(X+const).

From-SVN: r186588

2012-04-19  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>

	* config/arm/sync.md (sync_optab): Change ior attribute to "or".

From-SVN: r186587

From-SVN: r186586

2012-04-19  Richard Guenther  <rguenther@suse.de>

	PR rtl-optimization/44688
	* loop-iv.c (determine_max_iter): Only return max_iter.
	(iv_number_of_iterations): Also use the recorded loop bound
	on the maximum number of iterations.
	* loop-unroll.c (decide_unroll_runtime_iterations): Use
	max_iter to avoid unrolling loops that do not roll.
	(decide_unroll_stupid): Likewise.

	* gcc.dg/var-expand1.c: Increase array size to make unrolling
	possibly profitable.

From-SVN: r186585

From-SVN: r186584

From-SVN: r186580