objc/
* objc-act.c (objc_build_string_object): Pass location to
build_unary_op.
(init_def_list): Same.
(init_objc_symtab): Same.
(init_module_descriptor): Same.
(build_module_initializer_routine): Same.
(generate_static_references): Same.
(build_typed_selector_reference): Same.
(add_objc_string): Same.
(objc_substitute_decl): Same.
(objc_build_ivar_assignment): Same.
(objc_build_global_assignment): Same.
(objc_build_strong_cast_assignment): Same.
(generate_protocols): Same.
(build_protocol_initializer): Same.
(build_dispatch_table_initializer): Same.
(generate_protocol_list): Same.
(build_category_initializer): Same.
(build_shared_structure_initializer): Same.
(generate_shared_structures): Same.
(objc_build_protocol_expr): Same.
(build_ivar_reference): Same.
(get_super_receiver): Same.
build_modify_expr.
gcc/
* c-decl.c (finish_decl): Pass input_location to build_unary_op.
* c-typeck.c (array_to_pointer_conversion): Pass location to
build_unary_op.
(function_to_pointer_conversion): Use error_at and warning_at.
(build_indirect_ref): Same.
(build_array_ref): Pass location to build_binary_op.
(parser_build_unary_op): Do not set location after calling
build_unary_op.
(build_unary_op): Add location argument. Use it throughout. Set
EXPR_LOCATION before returning new tree.
(build_modify_expr): Same.
(build_binary_op): Use location throughout. Set EXPR_LOCATION before
returning node.
* c-omp.c (c_finish_omp_atomic): Pass location to build_unary_op,
build_indirect_ref, build_modify_expr.
(c_finish_omp_for): Same. Use error_at instead of error.
* c-common.c (c_common_truthvalue_conversion): Pass location to
build_unary_op.
(warn_for_div_by_zero): Add location argument.
* c-common.h: Add argument to build_modify_expr, build_indirect_ref,
build_unary_op, warn_for_div_by_zero.
* c-parser.c (c_parser_typeof_specifier): Use
protected_set_expr_location.
(c_parser_statement_after_labels): Same.
(c_parser_condition): Same.
(c_parser_expr_no_commas): Pass correct location to build_modify_expr.
(c_parser_conditional_expression): Use protected_set_expr_location.
(c_parser_unary_expression): Pass location to build_indirect_ref.
(c_parser_postfix_expression_after_primary): Pass location to
build_indirect_ref, build_unary_op.
(c_parser_omp_for_loop): Set the increment expression's EXPR_LOCATION.
testsuite/
* gcc.dg/gomp/for-1.c: Test column.
* gcc.dg/misc-column.c: Add column tests for unary arguments.
cp/
* typeck.c (build_x_indirect_ref): Add location argument.
(cp_build_binary_op): Pass location to warn_for_div_by_zero.
(cp_build_unary_op): Add location argument.
(cp_build_modify_expr): Same.
* class.c (build_base_path): Pass location to build_indirect_ref.
* semantics.c (handle_omp_for_class_iterator): Pass elocus to
build_modify_expr.