middle-end: add support for per-location warning groups.

gcc/ChangeLog:

	* builtins.c (warn_string_no_nul): Replace uses of TREE_NO_WARNING,
	gimple_no_warning_p and gimple_set_no_warning with
	warning_suppressed_p, and suppress_warning.
	(c_strlen): Same.
	(maybe_warn_for_bound): Same.
	(warn_for_access): Same.
	(check_access): Same.
	(expand_builtin_strncmp): Same.
	(fold_builtin_varargs): Same.
	* calls.c (maybe_warn_nonstring_arg): Same.
	(maybe_warn_rdwr_sizes): Same.
	* cfgexpand.c (expand_call_stmt): Same.
	* cgraphunit.c (check_global_declaration): Same.
	* fold-const.c (fold_undefer_overflow_warnings): Same.
	(fold_truth_not_expr): Same.
	(fold_unary_loc): Same.
	(fold_checksum_tree): Same.
	* gimple-array-bounds.cc (array_bounds_checker::check_array_ref): Same.
	(array_bounds_checker::check_mem_ref): Same.
	(array_bounds_checker::check_addr_expr): Same.
	(array_bounds_checker::check_array_bounds): Same.
	* gimple-expr.c (copy_var_decl): Same.
	* gimple-fold.c (gimple_fold_builtin_strcpy): Same.
	(gimple_fold_builtin_strncat): Same.
	(gimple_fold_builtin_stxcpy_chk): Same.
	(gimple_fold_builtin_stpcpy): Same.
	(gimple_fold_builtin_sprintf): Same.
	(fold_stmt_1): Same.
	* gimple-ssa-isolate-paths.c (diag_returned_locals): Same.
	* gimple-ssa-nonnull-compare.c (do_warn_nonnull_compare): Same.
	* gimple-ssa-sprintf.c (handle_printf_call): Same.
	* gimple-ssa-store-merging.c (imm_store_chain_info::output_merged_store): Same.
	* gimple-ssa-warn-restrict.c (maybe_diag_overlap): Same.
	* gimple-ssa-warn-restrict.h: Adjust declarations.
	(maybe_diag_access_bounds): Replace uses of TREE_NO_WARNING,
	gimple_no_warning_p and gimple_set_no_warning with
	warning_suppressed_p, and suppress_warning.
	(check_call): Same.
	(check_bounds_or_overlap): Same.
	* gimple.c (gimple_build_call_from_tree): Same.
	* gimplify.c (gimplify_return_expr): Same.
	(gimplify_cond_expr): Same.
	(gimplify_modify_expr_complex_part): Same.
	(gimplify_modify_expr): Same.
	(gimple_push_cleanup): Same.
	(gimplify_expr): Same.
	* omp-expand.c (expand_omp_for_generic): Same.
	(expand_omp_taskloop_for_outer): Same.
	* omp-low.c (lower_rec_input_clauses): Same.
	(lower_lastprivate_clauses): Same.
	(lower_send_clauses): Same.
	(lower_omp_target): Same.
	* tree-cfg.c (pass_warn_function_return::execute): Same.
	* tree-complex.c (create_one_component_var): Same.
	* tree-inline.c (remap_gimple_op_r): Same.
	(copy_tree_body_r): Same.
	(declare_return_variable): Same.
	(expand_call_inline): Same.
	* tree-nested.c (lookup_field_for_decl): Same.
	* tree-sra.c (create_access_replacement): Same.
	(generate_subtree_copies): Same.
	* tree-ssa-ccp.c (pass_post_ipa_warn::execute): Same.
	* tree-ssa-forwprop.c (combine_cond_expr_cond): Same.
	* tree-ssa-loop-ch.c (ch_base::copy_headers): Same.
	* tree-ssa-loop-im.c (execute_sm): Same.
	* tree-ssa-phiopt.c (cond_store_replacement): Same.
	* tree-ssa-strlen.c (maybe_warn_overflow): Same.
	(handle_builtin_strcpy): Same.
	(maybe_diag_stxncpy_trunc): Same.
	(handle_builtin_stxncpy_strncat): Same.
	(handle_builtin_strcat): Same.
	* tree-ssa-uninit.c (get_no_uninit_warning): Same.
	(set_no_uninit_warning): Same.
	(uninit_undefined_value_p): Same.
	(warn_uninit): Same.
	(maybe_warn_operand): Same.
	* tree-vrp.c (compare_values_warnv): Same.
	* vr-values.c (vr_values::extract_range_for_var_from_comparison_expr): Same.
	(test_for_singularity): Same.

	* gimple.h (warning_suppressed_p): New function.
	(suppress_warning): Same.
	(copy_no_warning): Same.
	(gimple_set_block): Call gimple_set_location.
	(gimple_set_location): Call copy_warning.

1 files changed, 5 insertions, 5 deletions

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index f126d2a..c73e1cb 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -9445,7 +9445,7 @@ pass_warn_function_return::execute (function *fun)
   /* If we see "return;" in some basic block, then we do reach the end
      without returning a value.  */
   else if (warn_return_type > 0
-	   && !TREE_NO_WARNING (fun->decl)
+	   && !warning_suppressed_p (fun->decl, OPT_Wreturn_type)
 	   && !VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fun->decl))))
     {
       FOR_EACH_EDGE (e, ei, EXIT_BLOCK_PTR_FOR_FN (fun)->preds)
@@ -9454,14 +9454,14 @@ pass_warn_function_return::execute (function *fun)
 	  greturn *return_stmt = dyn_cast <greturn *> (last);
 	  if (return_stmt
 	      && gimple_return_retval (return_stmt) == NULL
-	      && !gimple_no_warning_p (last))
+	      && !warning_suppressed_p (last, OPT_Wreturn_type))
 	    {
 	      location = gimple_location (last);
 	      if (LOCATION_LOCUS (location) == UNKNOWN_LOCATION)
 		location = fun->function_end_locus;
 	      if (warning_at (location, OPT_Wreturn_type,
 			      "control reaches end of non-void function"))
-		TREE_NO_WARNING (fun->decl) = 1;
+		suppress_warning (fun->decl, OPT_Wreturn_type);
 	      break;
 	    }
 	}
@@ -9469,7 +9469,7 @@ pass_warn_function_return::execute (function *fun)
 	 into __builtin_unreachable () call with BUILTINS_LOCATION.
 	 Recognize those too.  */
       basic_block bb;
-      if (!TREE_NO_WARNING (fun->decl))
+      if (!warning_suppressed_p (fun->decl, OPT_Wreturn_type))
 	FOR_EACH_BB_FN (bb, fun)
 	  if (EDGE_COUNT (bb->succs) == 0)
 	    {
@@ -9493,7 +9493,7 @@ pass_warn_function_return::execute (function *fun)
 		    location = fun->function_end_locus;
 		  if (warning_at (location, OPT_Wreturn_type,
 				  "control reaches end of non-void function"))
-		    TREE_NO_WARNING (fun->decl) = 1;
+		    suppress_warning (fun->decl, OPT_Wreturn_type);
 		  break;
 		}
 	    }