* configure.ac: Determine Sun ld version numbers.
	(comdat_group): Restrict GNU ld version checks to gld.
	(comdat_group, *-*-solaris2.1[1-9]*): Enable for Sun ld > 1.1688.
	(enable_comdat): Support --enable-comdat.
	* configure: Regenerate.
	* doc/install.texi (Configuration): Document --enable-comdat.

From-SVN: r158172

	* config/sparc/sol2-gld.h: Remove SPARC reference.
	Rename ...
	* config/sol2-gld.h: ... here.
	* config.gcc (sparc*-*-solaris2*): Reflect this.
	(i[34567]86-*-solaris2*): Use it.

From-SVN: r158171

2010-04-09  Steve Ellcey  <sje@cup.hp.com>

	* config/ia64/ia64.c (ia64_dfa_new_cycle): Remove unused variable
	setup_clocks_p.
	(final_emit_insn_group_barriers): Remove unused variable prev_insn.

From-SVN: r158170

2010-04-09  Manuel López-Ibáñez <manu@gcc.gnu.org>

	PR cpp/43195
libcpp/
	* files.c (report_missing_guard): Test for #pragma once.
testsuite/
	* gcc.dg/cpp/pr43195.c: New.
	* gcc.dg/cpp/pr43195.h: New.

From-SVN: r158169

2010-04-09  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR 42965
	* diagnostic.c (diagnostic_initialize): Initialize
	some_warnings_are_errors.
	(diagnostic_finish): New.
	(diagnostic_action_after_output): Call it before exiting.
	(diagnostic_report_diagnostic): Do not print message here. Set
	some_warnings_are_errors.
	* diagnostic.h (diagnostic_context): Delete
	issue_warnings_are_errors_message. Add some_warnings_are_errors.
	(diagnostic_finish): Declare.
	* toplev.c (toplev_main): Call it before exit.
testsuite/
	* gcc.dg/Werror-6.c: Adjust.
	* gcc.dg/Werror-implicit-function-declaration.c: Likewise.
	* gcc.dg/Werror-4.c: Likewise.
	* gcc.dg/Wdeclaration-after-statement-3.c: Likewise.
	* gcc.dg/Wswitch-enum-error.c: Likewise.
	* gcc.dg/Wpointer-arith.c: Likewise.
	* gcc.dg/Wfatal.c: Likewise.
	* gcc.dg/Wswitch-error.c: Likewise.
	* g++.dg/warn/unused-result1-Werror.c: Likewise.
	* gcc.dg/Werror-9.c: Delete. Duplicate of Werror-4.c.
	* gcc.dg/cpp/warn-undef-2.c: Likewise.
	* gcc.dg/cpp/warn-traditional-2.c: Likewise.
	* gcc.dg/cpp/warn-comments-2.c: Likewise.
	* gcc.dg/cpp/warn-variadic-2.c: Likewise.
	* gcc.dg/cpp/warning-directive-2.c: Likewise.
	* gcc.dg/cpp/warn-long-long-2.c: Likewise.
	* gcc.dg/cpp/warn-deprecated-2.c: Likewise.
	* gcc.dg/cpp/warn-multichar-2.c: Likewise.
	* gcc.dg/cpp/warn-normalized-3.c: Likewise.
	* gcc.dg/cpp/warn-cxx-compat-2.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-3.c: Likewise.
	* gcc.dg/cpp/warn-unused-macros-2.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-4.c: Likewise.
	* gcc.dg/cpp/warn-redefined-2.c: Likewise.
	* g++.dg/cpp/warning-directive-2.C: Likewise.
	* gfortran.dg/warning-directive-2.F90: Likewise.

From-SVN: r158168

	PR c++/42623
	* c-common.c (c_sizeof_or_alignof_type): Return error_mark_node
	for incomplete type.

From-SVN: r158167

	PR c++/41788
	* stor-layout.c (finalize_record_size): Don't change TYPE_PACKED
	based on a warning flag.

From-SVN: r158166

2010-04-09  Richard Guenther  <rguenther@suse.de>

	* tree-pretty-print.c (dump_generic_node): Dump
	TYPE_VECTOR_SUBPARTS.

From-SVN: r158165

gcc/
2010-04-09  Iain Sandoe  <iains@gcc.gnu.org>

	PR bootstrap/43684
	* varasm.c (default_assemble_visibility): Wrap vars that are 
	set, but unused, by targets without GAS.
	* config/rs6000/rs6000.c: (paired_emit_vector_compare): 
	Remove set, but unused, vars.
	(rs6000_legitimize_tls_address): Likewise.
	(altivec_expand_dst_builtin): Likewise.
	* config/darwin.c (machopic_classify_symbol): Likewise.
	(machopic_indirection_name): Likewise.

gcc/fortran/
2010-04-09  Iain Sandoe  <iains@gcc.gnu.org>

	PR bootstrap/43684
	* gfortranspec.c (lang_specific_driver): Do not expose vars 
	only used by HAVE_LD_STATIC_DYNAMIC targets unless compiling
	for such.

From-SVN: r158164

	* config/i386/i386.md (DWI): New mode iterator.
	(S): New mode attribute.
	(shift_operand): Ditto.
	(shift_immediate_operand): Ditto.
	(ashl_input_operand): Ditto.
	(ashl<mode>3): Macroize expander from ashl{qi,hi,si,di,ti}3_1
	using SDWIM mode iterator.
	(*ashl<mode>3_doubleword): New insn_and_split_pattern.  Macroize
	pattern from *ashl{di,ti}3_1 and corresponding splitters using
	DWI mode iterator.
	(*ashl<mode>3_doubleword peephole2): Macroize peephole2 pattern
	from corresponding peephole2 patterns.
	(x86_shift<mode>_adj_1): Macroize expander from x86_shift_adj_1
	and x86_64_shift_adj_1 using SWI48 mode iterator.
	(x86_shift<mode>_adj_2): Ditto.
	(*ashldi3_1_rex64): Split TYPE_LEA pattern.
	(*ashl<mode>3_1): Macroize insn from *ashlsi3_1 and *ashldi3_1_rex64
	using SWI48 mode iterator.
	(*ashl<mode>3_cmp): Macroize insn from *ashl{qi,hi,si}3_cmp and
	*ashldi3_cmp_rex64 using SWI mode iterator.
	(*ashl<mode>3_cconly): Macroize insn from *ashl{qi,hi,si}3_cconly and
	*ashldi3_cconly_rex64 using SWI mode iterator.
	* config/i386/i386.c (ix86_split_ashl): Update for renamed
	x86_shift<mode>_adj_{1,2}.
	(ix86_split_ashr): Ditto.
	(ix86_split_lshr): Ditto.

From-SVN: r158163

2010-04-09  Richard Guenther  <rguenther@suse.de>

	* target.h (builtin_conversion): Pass in input and output types.
	* targhooks.c (default_builtin_vectorized_conversion): Adjust.
	* targhooks.h (default_builtin_vectorized_conversion): Likewise.
	* tree-vect-stmts.c (vectorizable_conversion): Adjust.
	* doc/tm.texi (TARGET_VECTORIZE_BUILTIN_CONVERSION): Adjust.

	* config/i386/i386.c (ix86_vectorize_builtin_conversion): Adjust.
	Handle AVX modes.
	* config/rs6000/rs6000.c (rs6000_builtin_conversion): Adjust.

From-SVN: r158162

	* gcc-interface/gigi.h (maybe_variable): Delete.
	(protect_multiple_eval): Likewise.
	(maybe_stabilize_reference): Likewise.
	(gnat_save_expr): Declare.
	(gnat_protect_expr): Likewise.
	(gnat_stabilize_reference): Likewise.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <object>: Use
	gnat_stabilize_reference.
	(maybe_variable): Delete.
	(elaborate_expression_1): Use gnat_save_expr.
	* gcc-interface/trans.c (Attribute_to_gnu): Use gnat_protect_expr.
	(call_to_gnu): Pass NULL to gnat_stabilize_reference.
	(gnat_to_gnu) <N_Object_Declaration>: Use gnat_save_expr.
	<N_Slice>: Use gnat_protect_exp.
	<N_Selected_Component>: Pass NULL to gnat_stabilize_reference.
	<N_In>: Use gnat_protect_expr.
	Pass NULL to gnat_stabilize_reference.
	(build_unary_op_trapv): Use gnat_protect_expr.
	(build_binary_op_trapv): Likewise.
	(emit_range_check): Likewise.
	(emit_index_check): Likewise.
	(convert_with_check): Likewise.
	(protect_multiple_eval): Move to utils2.c file.
	(maybe_stabilize_reference): Merge into...
	(gnat_stabilize_reference): ...this.  Move to utils2.c file.
	(gnat_stabilize_reference_1): Likewise.
	* gcc-interface/utils.c (convert_to_fat_pointer): Use gnat_protect_expr
	instead of protect_multiple_eval.
	* gcc-interface/utils2.c (compare_arrays): Likewise.
	(nonbinary_modular_operation): Likewise.
	(maybe_wrap_malloc): Likewise.
	(build_allocator): Likewise.
	(gnat_save_expr): New function.
	(gnat_protect_expr): Rename from protect_multiple_eval.  Early return
	in common cases.  Propagate TREE_READONLY onto dereferences.
	(gnat_stabilize_reference_1): Move from trans.c file.
	(gnat_stabilize_reference): Likewise.

From-SVN: r158159

2010-04-09  Richard Guenther  <rguenther@suse.de>

	PR target/43152
	* config/i386/sse.md (vcond<mode>): Handle AVX modes as well.

From-SVN: r158158

2010-04-09  Richard Guenther  <rguenther@suse.de>

	* tree-vectorizer.h (struct _stmt_vec_info): Document
	that vectype is the type of the LHS.
	(supportable_widening_operation, supportable_narrowing_operation): 
	Get both input and output vector types as arguments.
	(vect_is_simple_use_1): Declare.
	(get_same_sized_vectype): Likewise.
	* tree-vect-loop.c (vect_determine_vectorization_factor):
	Set STMT_VINFO_VECTYPE to the vector type of the def.
	(vectorizable_reduction): Adjust.
	* tree-vect-patterns.c (vect_recog_widen_mult_pattern):
	Adjust.  Specify the output vector type.
	(vect_pattern_recog_1): Adjust.
	* tree-vect-stmts.c (get_same_sized_vectype): New function.
	(vectorizable_call): Adjust.
	(vectorizable_conversion): Likewise.
	(vectorizable_operation): Likewise.
	(vectorizable_type_demotion): Likewise.
	(vectorizable_type_promotion): Likewise.
	(vect_analyze_stmt): Set STMT_VINFO_VECTYPE to the vector type of
	the def.
	(vect_is_simple_use_1): New function.
	(supportable_widening_operation): Get both input and output
	vector types.
	(supportable_narrowing_operation): Likewise.
	* tree-vect-slp.c (vect_schedule_slp_instance): Adjust.

From-SVN: r158157

	* gcc-interface/gigi.h (gnat_mark_addressable): Rename parameter.
	* gcc-interface/decl.c (maybe_variable): Do not set TREE_STATIC on _REF
	node.  Use the type of the operand to set TREE_READONLY.
	* gcc-interface/trans.c (Identifier_to_gnu): Do not set TREE_STATIC on
	_REF node.  Do not overwrite TREE_READONLY.
	(call_to_gnu): Rename local variable and fix various nits.  In the
	copy-in/copy-out case, build the SAVE_EXPR manually.
	(convert_with_check): Call protect_multiple_eval in lieu of save_expr
	and fold the computations.
	(protect_multiple_eval): Always save entire fat pointers.
	(maybe_stabilize_reference): Minor tweaks.
	(gnat_stabilize_reference_1): Likewise.  Do not deal with tcc_constant,
	tcc_type and tcc_statement.
	* gcc-interface/utils.c (convert_to_fat_pointer): Call
	protect_multiple_eval in lieu of save_expr.
	(convert): Minor tweaks.
	(maybe_unconstrained_array): Do not set TREE_STATIC on _REF node.
	(builtin_type_for_size): Call gnat_type_for_size directly.
	* gcc-interface/utils2.c (contains_save_expr_p): Delete.
	(contains_null_expr): Likewise
	(gnat_build_constructor): Do not call it.
	(compare_arrays): Deal with all side-effects, use protect_multiple_eval
	instead of gnat_stabilize_reference to protect the operands.
	(nonbinary_modular_operation): Call protect_multiple_eval in lieu of
	save_expr.
	(maybe_wrap_malloc): Likewise.
	(build_allocator): Likewise.
	(build_unary_op) <INDIRECT_REF>: Do not set TREE_STATIC on _REF node.
	(gnat_mark_addressable): Rename parameter.

From-SVN: r158156

2010-04-09  Kai Tietz  <kai.tietz@onevision.com>

        * config/i386/cygming.h (TARGET_OS_CPP_BUILTINS): Add
        __thiscall and _thiscall as predefined macros.
        * config/i386/i386.c (ix86_handle_cconv_attribute): Add
        thiscall attribute handling.
        (ix86_comp_type_attributes): Likewise.
        (ix86_function_regparm): Likewise.
        (ix86_return_pops_args): Likewise.
        (init_cumulative_args): Likewise.
        (find_drap_reg): Likewise.
        (ix86_static_chain): Likewise.
        (x86_this_parameter): Likewise.
        (x86_output_mi_thunk): Likewise.
        (ix86_attribute_table): Add description for thiscall attribute.
        * config/i386/i386.h (ix86_args): Adjust comment for member
        fastcall.
        * doc/extend.texi: Add documentation for thiscall.

From-SVN: r158155

2010-04-09  Kai Tietz  <kai.tietz@onevision.com>

        * g++.dg/other/pr35504.C: Add check for thiscall.
        * g++.dg/torture/stackalign/eh-thiscall-1.C: New.
        * gcc.dg/torture/stackalign/thiscall-1.c: New.

From-SVN: r158153

2010-04-09  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR c++/28584
	* c.opt (Wint-to-pointer-cast): Available in C++.
	* doc/invoke.texi (Wint-to-pointer-cast): Available in C++.
cp/
	* typeck.c (cp_build_c_cast): Warn for casting integer to larger
	pointer type.
testsuite/
	* gcc.dg/Wint-to-pointer-cast-1.c: Move to...
	* c-c++-common/Wint-to-pointer-cast-1.c: ...  here.
	* gcc.dg/Wint-to-pointer-cast-2.c: Move to...	
	* c-c++-common/Wint-to-pointer-cast-2.c: ...  here.
	* gcc.dg/Wint-to-pointer-cast-3.c: Move to...	
	* c-c++-common/Wint-to-pointer-cast-3.c: ...  here. Update.
	* g++.old-deja/g++.mike/warn1.C: Add -Wno-int-to-pointer-cast.
	* g++.dg/other/increment1.C: Likewise.

From-SVN: r158150

2010-04-09  Tobias Burnus  <burnus@net-b.de>

        PR fortran/18918
        * decl.c (variable_decl, match_attr_spec): Fix setting the array
        spec.
        * array.c (match_subscript,gfc_match_array_ref): Add coarray
        * support.
        * data.c (gfc_assign_data_value): Ditto.
        * expr.c (gfc_check_pointer_assign): Add check for coarray
        * constraint.
        (gfc_traverse_expr): Traverse also through codimension expressions.
        (gfc_is_coindexed, gfc_has_ultimate_allocatable,
        gfc_has_ultimate_pointer): New functions.
        * gfortran.h (gfc_array_ref_dimen_type): Add DIMEN_STAR for
        * coarrays.
        (gfc_array_ref): Add codimen.
        (gfc_array_ref): Add in_allocate.
        (gfc_is_coindexed, gfc_has_ultimate_allocatable,
        gfc_has_ultimate_pointer): Add prototypes.
        * interface.c (compare_parameter, compare_actual_formal,
        check_intents): Add coarray constraints.
        * match.c (gfc_match_iterator): Add coarray constraint.
        * match.h (gfc_match_array_ref): Update interface.
        * primary.c (gfc_match_varspec): Handle codimensions.
        * resolve.c (coarray_alloc, inquiry_argument): New static
        * variables.
        (check_class_members): Return gfc_try instead for error recovery.
        (resolve_typebound_function,resolve_typebound_subroutine,
        check_members): Handle return value of check_class_members.
        (resolve_structure_cons, resolve_actual_arglist, resolve_function,
        check_dimension, compare_spec_to_ref, resolve_array_ref,
        resolve_ref, resolve_variable, gfc_resolve_expr, conformable_arrays,
        resolve_allocate_expr, resolve_ordinary_assign): Add coarray
        support.
        * trans-array.c (gfc_conv_array_ref, gfc_walk_variable_expr):
        Skip over coarray refs.
        (gfc_array_allocate) Add support for references containing coindexes.
        * trans-expr.c (gfc_add_interface_mapping): Copy coarray
        * attribute.
        (gfc_map_intrinsic_function): Ignore codimensions.

2010-04-09  Tobias Burnus  <burnus@net-b.de>

        PR fortran/18918
        * gfortran.dg/coarray_7.f90: New test.
        * gfortran.dg/coarray_8.f90: New test.

From-SVN: r158149

2010-04-08  Bud Davis  <bdavis9659@sbcglobal.net>

	PR fortran/28039
	* gfortran.dg/fmt_with_extra.f: Remove xfail and update test.

From-SVN: r158148

2010-04-08  Bud Davis  <bdavis9659@sbcglobal.net>

	PR fortran/28039
	* io.c (check_format_string):  Added check for additional non 
	blank characters after the format string was successfully 
	parsed.
	* io.c (check_format): Changed the error messages for positive
	int required and period required to drop through the error logic
	and report with gfc_error instead of gfc_error_now.  Corrected
	format postion for hollerith strings.

From-SVN: r158147

From-SVN: r158143

	* tree.h (TREE_ADDRESSABLE): Document its effect for function types.
	* calls.c (expand_call): Pass the function type to aggregate_value_p.
	* function.c (aggregate_value_p): Do not honor DECL_BY_REFERENCE on
	the target function of a CALL_EXPR.  Honor TREE_ADDRESSABLE on the
	function type instead.  Reorder and simplify checks.

	* gimplify.c (gimplify_modify_expr_rhs) <WITH_SIZE_EXPR>: New case.
ada/
	* gcc-interface/ada-tree.h (TYPE_RETURNS_UNCONSTRAINED_P): Rename into.
	(TYPE_RETURN_UNCONSTRAINED_P): ...this.
	(TYPE_RETURNS_BY_REF_P): Rename into.
	(TYPE_RETURN_BY_DIRECT_REF_P): ...this.
	(TYPE_RETURNS_BY_TARGET_PTR_P): Delete.
	* gcc-interface/gigi.h (create_subprog_type): Adjust parameter names.
	(build_return_expr): Likewise.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Subprogram_Type>:
	Rename local variables.  If the return Mechanism is By_Reference, pass
	return_by_invisible_ref_p to create_subprog_type instead of toggling
	TREE_ADDRESSABLE.  Test return_by_invisible_ref_p in order to annotate
	the mechanism.  Use regular return for contrained types with non-static
	size and return by invisible reference for unconstrained return types
	with default discriminants.  Update comment.
	* gcc-interface/trans.c (Subprogram_Body_to_gnu): If the function
	returns by invisible reference, turn the RESULT_DECL into a pointer.
	Do not handle DECL_BY_REF_P in the CICO case here.
	(call_to_gnu): Remove code handling return by target pointer.  For a
	function call, if the return type has non-constant size, generate the
	assignment with an INIT_EXPR.
	(gnat_to_gnu) <N_Return_Statement>: Remove dead code in the CICO case.
	If the function returns by invisible reference, build the copy return
	operation manually.
	(add_decl_expr): Initialize the variable with an INIT_EXPR.
	* gcc-interface/utils.c (create_subprog_type): Adjust parameter names.
	Adjust for renaming of macros.  Copy the node only when necessary.
	(create_subprog_decl): Do not toggle TREE_ADDRESSABLE on the return
	type, only change DECL_BY_REFERENCE on the RETURN_DECL.
	(convert_from_reference): Delete.
	(is_byref_result): Likewise.
	(gnat_genericize_r): Likewise.
	(gnat_genericize): Likewise.
	(end_subprog_body): Do not call gnat_genericize.
	* gcc-interface/utils2.c (build_binary_op) <INIT_EXPR>: New case.
	(build_return_expr): Adjust parameter names, logic and comment.

From-SVN: r158139

2010-04-07  Jing Yu  <jingyu@google.com>
            Zdenek Dvorak  <ook@ucw.cz>

	PR tree-optimization/42720
	* tree-ssa-loop-unswitch.c (tree_ssa_unswitch_loops): Move one-time
	loop unswitch conditions here from
	(tree_unswitch_single_loop).

Co-Authored-By: Zdenek Dvorak <ook@ucw.cz>

From-SVN: r158138

2010-04-08  Sebastian Pop  <sebastian.pop@amd.com>

	* tree-if-conv.c: Fix comments and simplify logic.

From-SVN: r158136

2010-04-08  Sebastian Pop  <sebastian.pop@amd.com>

	* tree-if-conv.c (if_convertible_loop_p): Remove unused parameter.
	(tree_if_conversion): Same.  Update call to if_convertible_loop_p.
	(main_tree_if_conversion): Update call to tree_if_conversion.

From-SVN: r158135

2010-04-08  Manuel López-Ibáñez  <manu@gcc.gnu.org>

	PR 42485
	* doc/invoke.texi (-b,-V): Delete.
	* doc/tm.texi: Do not mention -b.
	* gcc.c (display_help): Delete -b and -V.
	(process_command): Delete -b and -V.
	* gcc.h (DEFAULT_SWITCH_TAKES_ARG): Delete -b and -V.

From-SVN: r158134

2010-04-08  Christian Borntraeger  <borntraeger@de.ibm.com>
            Wolfgang Gellerich  <gellerich@de.ibm.com>

        Implement target hook for loop unrolling
        * target.h (loop_unroll_adjust): Add a new target hook function.
        * target-def.h (TARGET_LOOP_UNROLL_ADJUST): Likewise.
        * doc/tm.texi (TARGET_LOOP_UNROLL_ADJUST): Document it.
        * config/s390/s390.c (TARGET_LOOP_UNROLL_ADJUST): Define it.
        (s390_loop_unroll_adjust): Implement the new target hook for s390.
        * loop-unroll.c (decide_unroll_runtime_iterations): Call loop unroll target hook
        (decide_unroll_stupid): Likewise.


Co-Authored-By: Wolfgang Gellerich <gellerich@de.ibm.com>

From-SVN: r158132

	gcc:
	PR target/43643
	* config/i386/gmon-sol2.c [__x86_64__]: Properly restore %rcx.

	gcc/testsuite:
	PR target/43643
	* gcc.dg/pr43643.c: New test.

From-SVN: r158130

2010-04-08  Tobias Burnus  <burnus@net-b.de>

        * module.c (use_iso_fortran_env_module): Fix standard check.

2010-04-08  Tobias Burnus  <burnus@net-b.de>

        * gfortran.dg/iso_fortran_env_6.f90: Add more checks.

From-SVN: r158129

	* doc/install.texi (Specific, i?86-*-solaris2.10): Fix grammar.
	(Specific, *-*-solaris2*): Likewise.
	Don't prefer Sun as over GNU as.

From-SVN: r158127

2010-04-08  Wolfgang Gellerich  <gellerich@de.ibm.com>

	* config/s390/s390.c (override_options): Adjust the z10
          defaults for max-unroll-times, max-completely-peeled-insns
          and max-completely-peel-times.

From-SVN: r158122

2010-04-08  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>

	* config/s390/s390.c (s390_expand_movmem): Issue prefetch
	instructions for z10.
	(s390_expand_setmem): Likewise.
	(s390_expand_cmpmem): Likewise.

From-SVN: r158116

2010-04-08  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/43679
	* tree-ssa-pre.c (eliminate): Only propagate copies.

	* gcc.c-torture/compile/pr43679.c: New testcase.

From-SVN: r158112

	PR bootstrap/43681
	* expr.c (block_move_libcall_safe_for_call_parm): Avoid
	set but not used variable warning.

From-SVN: r158111

        PR target/41653
        * config/arm/arm.c (thumb1_size_rtx_costs): New function.
        (arm_size_rtx_costs): Call the new function when optimized for size.

From-SVN: r158110

	PR debug/43670
	* cfgexpand.c (expand_debug_expr): If for non-NULL offset
	op0 is not a MEM, just return NULL instead of assertion
	failure.
	(discover_nonconstant_array_refs): Don't walk debug stmts.

	* gcc.dg/pr43670.c: New test.

From-SVN: r158108

2010-04-07  Doug Kwan  <dougkwan@google.com>

	* configure.ac: Recognize gold and do not use its version number
	to test ld features.
	* configure: Regenerate.

From-SVN: r158106

	PR middle-end/40815
	* tree-ssa-reassoc.c (broken_up_substracts): Rename to plus_negates.
	(negate_value): Move code to push elements to broken_up_substracts ...
	(eliminate_plus_minus_pair): ... here.  Push operands that have no
	negative pair to plus_negates.
	(repropagate_negates, init_reassoc, fini_reassoc): Update.

	PR middle-end/40815
	* gcc.dg/tree-ssa/reassoc-19.c: New.

From-SVN: r158105

From-SVN: r158103