tree, v2: Add 3 argument fndecl_built_in_p

  On Wed, Feb 22, 2023 at 12:35:24PM +0000, Jonathan Wakely wrote:
> Yes, I was right, it doesn't work in gcc 4.8. This does though (with
> typos above fixed too, and actually tested on GCC 4.8.5):

I think we don't need the DECL_FUNCTION_CODE (node) in every recursive call,
we can just pass DECL_FUNCTION_CODE (node) down instead.

The following patch does that, tested again also with gcc 4.8:

2023-02-22  Jakub Jelinek  <jakub@redhat.com>
	    Jonathan Wakely  <jwakely@redhat.com>

	* tree.h (built_in_function_equal_p): New helper function.
	(fndecl_built_in_p): Turn into variadic template to support
	1 or more built_in_function arguments.
	* builtins.cc (fold_builtin_expect): Use 3 argument fndecl_built_in_p.
	* gimplify.cc (goa_stabilize_expr): Likewise.
	* cgraphclones.cc (cgraph_node::create_clone): Likewise.
	* ipa-fnsummary.cc (compute_fn_summary): Likewise.
	* omp-low.cc (setjmp_or_longjmp_p): Likewise.
	* cgraph.cc (cgraph_edge::redirect_call_stmt_to_callee,
	cgraph_update_edges_for_call_stmt_node,
	cgraph_edge::verify_corresponds_to_fndecl,
	cgraph_node::verify_node): Likewise.
	* tree-stdarg.cc (optimize_va_list_gpr_fpr_size): Likewise.
	* gimple-ssa-warn-access.cc (matching_alloc_calls_p): Likewise.
	* ipa-prop.cc (try_make_edge_direct_virtual_call): Handle
	BUILT_IN_UNREACHABLE_TRAP like BUILT_IN_UNREACHABLE.



	Jakub
  

> Am 22.02.2023 um 19:34 schrieb Jakub Jelinek <jakub@redhat.com>:
> 
> On Wed, Feb 22, 2023 at 12:35:24PM +0000, Jonathan Wakely wrote:
>> Yes, I was right, it doesn't work in gcc 4.8. This does though (with
>> typos above fixed too, and actually tested on GCC 4.8.5):
> 
> I think we don't need the DECL_FUNCTION_CODE (node) in every recursive call,
> we can just pass DECL_FUNCTION_CODE (node) down instead.
> 
> The following patch does that, tested again also with gcc 4.8:

Ok for stage1

Thanks,
Richard 

> 2023-02-22  Jakub Jelinek  <jakub@redhat.com>
>        Jonathan Wakely  <jwakely@redhat.com>
> 
>    * tree.h (built_in_function_equal_p): New helper function.
>    (fndecl_built_in_p): Turn into variadic template to support
>    1 or more built_in_function arguments.
>    * builtins.cc (fold_builtin_expect): Use 3 argument fndecl_built_in_p.
>    * gimplify.cc (goa_stabilize_expr): Likewise.
>    * cgraphclones.cc (cgraph_node::create_clone): Likewise.
>    * ipa-fnsummary.cc (compute_fn_summary): Likewise.
>    * omp-low.cc (setjmp_or_longjmp_p): Likewise.
>    * cgraph.cc (cgraph_edge::redirect_call_stmt_to_callee,
>    cgraph_update_edges_for_call_stmt_node,
>    cgraph_edge::verify_corresponds_to_fndecl,
>    cgraph_node::verify_node): Likewise.
>    * tree-stdarg.cc (optimize_va_list_gpr_fpr_size): Likewise.
>    * gimple-ssa-warn-access.cc (matching_alloc_calls_p): Likewise.
>    * ipa-prop.cc (try_make_edge_direct_virtual_call): Handle
>    BUILT_IN_UNREACHABLE_TRAP like BUILT_IN_UNREACHABLE.
> 
> --- gcc/tree.h.jj    2023-02-17 12:45:08.223636043 +0100
> +++ gcc/tree.h    2023-02-22 17:10:57.410410020 +0100
> @@ -6575,6 +6575,24 @@ type_has_mode_precision_p (const_tree t)
>   return known_eq (TYPE_PRECISION (t), GET_MODE_PRECISION (TYPE_MODE (t)));
> }
> 
> +/* Helper functions for fndecl_built_in_p.  */
> +
> +inline bool
> +built_in_function_equal_p (built_in_function name0, built_in_function name1)
> +{
> + return name0 == name1;
> +}
> +
> +/* Recursive case for two or more names.  */
> +
> +template <typename... F>
> +inline bool
> +built_in_function_equal_p (built_in_function name0, built_in_function name1,
> +               built_in_function name2, F... names)
> +{
> + return name0 == name1 || built_in_function_equal_p (name0, name2, names...);
> +}
> +
> /* Return true if a FUNCTION_DECL NODE is a GCC built-in function.
> 
>    Note that it is different from the DECL_IS_UNDECLARED_BUILTIN
> @@ -6606,13 +6624,16 @@ fndecl_built_in_p (const_tree node, unsi
> }
> 
> /* Return true if a FUNCTION_DECL NODE is a GCC built-in function
> -   of BUILT_IN_NORMAL class with name equal to NAME.  */
> +   of BUILT_IN_NORMAL class with name equal to NAME1 (or other mentioned
> +   NAMES).  */
> 
> +template <typename... F>
> inline bool
> -fndecl_built_in_p (const_tree node, built_in_function name)
> +fndecl_built_in_p (const_tree node, built_in_function name1, F... names)
> {
>   return (fndecl_built_in_p (node, BUILT_IN_NORMAL)
> -      && DECL_FUNCTION_CODE (node) == name);
> +      && built_in_function_equal_p (DECL_FUNCTION_CODE (node),
> +                    name1, names...));
> }
> 
> /* A struct for encapsulating location information about an operator
> --- gcc/builtins.cc.jj    2023-02-14 12:09:57.163647987 +0100
> +++ gcc/builtins.cc    2023-02-22 11:29:43.800179949 +0100
> @@ -8625,8 +8625,8 @@ fold_builtin_expect (location_t loc, tre
> 
>   if (TREE_CODE (inner) == CALL_EXPR
>       && (fndecl = get_callee_fndecl (inner))
> -      && (fndecl_built_in_p (fndecl, BUILT_IN_EXPECT)
> -      || fndecl_built_in_p (fndecl, BUILT_IN_EXPECT_WITH_PROBABILITY)))
> +      && fndecl_built_in_p (fndecl, BUILT_IN_EXPECT,
> +                BUILT_IN_EXPECT_WITH_PROBABILITY))
>     return arg0;
> 
>   inner = inner_arg0;
> --- gcc/gimplify.cc.jj    2023-02-15 09:23:27.807390189 +0100
> +++ gcc/gimplify.cc    2023-02-22 11:32:38.446655528 +0100
> @@ -15815,8 +15815,8 @@ goa_stabilize_expr (tree *expr_p, gimple
>       if (TREE_CODE (expr) == CALL_EXPR)
>    {
>      if (tree fndecl = get_callee_fndecl (expr))
> -        if (fndecl_built_in_p (fndecl, BUILT_IN_CLEAR_PADDING)
> -        || fndecl_built_in_p (fndecl, BUILT_IN_MEMCMP))
> +        if (fndecl_built_in_p (fndecl, BUILT_IN_CLEAR_PADDING,
> +                       BUILT_IN_MEMCMP))
>          {
>        int nargs = call_expr_nargs (expr);
>        for (int i = 0; i < nargs; i++)
> --- gcc/cgraphclones.cc.jj    2023-02-22 11:21:56.467934980 +0100
> +++ gcc/cgraphclones.cc    2023-02-22 11:28:30.272242754 +0100
> @@ -425,9 +425,8 @@ cgraph_node::create_clone (tree new_decl
>     version.  The only exception is when the edge was proved to
>     be unreachable during the cloning procedure.  */
>       if (!e->callee
> -      || !(fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
> -           || fndecl_built_in_p (e->callee->decl,
> -                     BUILT_IN_UNREACHABLE_TRAP)))
> +      || !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE,
> +                          BUILT_IN_UNREACHABLE_TRAP))
>         e->redirect_callee_duplicating_thunks (new_node);
>     }
>   new_node->expand_all_artificial_thunks ();
> --- gcc/ipa-fnsummary.cc.jj    2023-01-02 09:32:45.510951148 +0100
> +++ gcc/ipa-fnsummary.cc    2023-02-22 11:33:07.922229473 +0100
> @@ -3180,8 +3180,8 @@ compute_fn_summary (struct cgraph_node *
>           for (e = node->callees; e; e = e->next_callee)
>         {
>           tree cdecl = e->callee->decl;
> -           if (fndecl_built_in_p (cdecl, BUILT_IN_APPLY_ARGS)
> -               || fndecl_built_in_p (cdecl, BUILT_IN_VA_START))
> +           if (fndecl_built_in_p (cdecl, BUILT_IN_APPLY_ARGS,
> +                         BUILT_IN_VA_START))
>             break;
>         }
>           node->can_change_signature = !e;
> --- gcc/omp-low.cc.jj    2023-01-02 09:32:25.281243440 +0100
> +++ gcc/omp-low.cc    2023-02-22 11:35:06.418516664 +0100
> @@ -3992,8 +3992,7 @@ scan_omp_1_op (tree *tp, int *walk_subtr
> static bool
> setjmp_or_longjmp_p (const_tree fndecl)
> {
> -  if (fndecl_built_in_p (fndecl, BUILT_IN_SETJMP)
> -      || fndecl_built_in_p (fndecl, BUILT_IN_LONGJMP))
> +  if (fndecl_built_in_p (fndecl, BUILT_IN_SETJMP, BUILT_IN_LONGJMP))
>     return true;
> 
>   tree declname = DECL_NAME (fndecl);
> --- gcc/cgraph.cc.jj    2023-02-22 11:21:56.466934995 +0100
> +++ gcc/cgraph.cc    2023-02-22 11:27:29.907115300 +0100
> @@ -1548,8 +1548,8 @@ cgraph_edge::redirect_call_stmt_to_calle
>   else
>     {
>       if (flag_checking
> -      && !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
> -      && !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE_TRAP))
> +      && !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE,
> +                          BUILT_IN_UNREACHABLE_TRAP))
>    ipa_verify_edge_has_no_modifications (e);
>       new_stmt = e->call_stmt;
>       gimple_call_set_fndecl (new_stmt, e->callee->decl);
> @@ -1635,9 +1635,8 @@ cgraph_update_edges_for_call_stmt_node (
>    {
>      /* Keep calls marked as dead dead.  */
>      if (new_stmt && is_gimple_call (new_stmt) && e->callee
> -          && (fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
> -          || fndecl_built_in_p (e->callee->decl,
> -                    BUILT_IN_UNREACHABLE_TRAP)))
> +          && fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE,
> +                    BUILT_IN_UNREACHABLE_TRAP))
>        {
>          cgraph_edge::set_call_stmt (node->get_edge (old_stmt),
>                      as_a <gcall *> (new_stmt));
> @@ -3259,9 +3258,8 @@ cgraph_edge::verify_corresponds_to_fndec
>   /* Optimizers can redirect unreachable calls or calls triggering undefined
>      behavior to __builtin_unreachable or __builtin_unreachable trap.  */
> 
> -  if (fndecl_built_in_p (callee->decl, BUILT_IN_NORMAL)
> -      && (DECL_FUNCTION_CODE (callee->decl) == BUILT_IN_UNREACHABLE
> -      || DECL_FUNCTION_CODE (callee->decl) == BUILT_IN_UNREACHABLE_TRAP))
> +  if (fndecl_built_in_p (callee->decl, BUILT_IN_UNREACHABLE,
> +                       BUILT_IN_UNREACHABLE_TRAP))
>     return false;
> 
>   if (callee->former_clone_of != node->decl
> @@ -3601,9 +3599,8 @@ cgraph_node::verify_node (void)
>      /* Optimized out calls are redirected to __builtin_unreachable.  */
>      && (e->count.nonzero_p ()
>          || ! e->callee->decl
> -          || !(fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE)
> -           || fndecl_built_in_p (e->callee->decl,
> -                     BUILT_IN_UNREACHABLE_TRAP)))
> +          || !fndecl_built_in_p (e->callee->decl, BUILT_IN_UNREACHABLE,
> +                     BUILT_IN_UNREACHABLE_TRAP))
>      && count
>          == ENTRY_BLOCK_PTR_FOR_FN (DECL_STRUCT_FUNCTION (decl))->count
>      && (!e->count.ipa_p ()
> --- gcc/tree-stdarg.cc.jj    2023-01-02 09:32:24.970247934 +0100
> +++ gcc/tree-stdarg.cc    2023-02-22 11:38:22.383684097 +0100
> @@ -867,8 +867,8 @@ optimize_va_list_gpr_fpr_size (function
>          tree callee = gimple_call_fndecl (stmt);
> 
>          if (callee
> -          && (fndecl_built_in_p (callee, BUILT_IN_VA_START)
> -              || fndecl_built_in_p (callee, BUILT_IN_VA_END)))
> +          && fndecl_built_in_p (callee, BUILT_IN_VA_START,
> +                        BUILT_IN_VA_END))
>        continue;
>        }
> 
> --- gcc/gimple-ssa-warn-access.cc.jj    2023-02-16 10:13:23.822208868 +0100
> +++ gcc/gimple-ssa-warn-access.cc    2023-02-22 11:31:36.168555726 +0100
> @@ -1780,8 +1780,7 @@ matching_alloc_calls_p (tree alloc_decl,
> 
>       /* Return false for deallocation functions that are known not
>     to match.  */
> -      if (fndecl_built_in_p (dealloc_decl, BUILT_IN_FREE)
> -      || fndecl_built_in_p (dealloc_decl, BUILT_IN_REALLOC))
> +      if (fndecl_built_in_p (dealloc_decl, BUILT_IN_FREE, BUILT_IN_REALLOC))
>    return false;
>       /* Otherwise proceed below to check the deallocation function's
>     "*dealloc" attributes to look for one that mentions this operator
> @@ -1805,8 +1804,8 @@ matching_alloc_calls_p (tree alloc_decl,
>      if (DECL_IS_OPERATOR_DELETE_P (dealloc_decl))
>        return false;
> 
> -      if (fndecl_built_in_p (dealloc_decl, BUILT_IN_FREE)
> -          || fndecl_built_in_p (dealloc_decl, BUILT_IN_REALLOC))
> +      if (fndecl_built_in_p (dealloc_decl, BUILT_IN_FREE,
> +                           BUILT_IN_REALLOC))
>        return true;
> 
>      alloc_dealloc_kind = alloc_kind_t::builtin;
> --- gcc/ipa-prop.cc.jj    2023-01-02 09:32:46.077942956 +0100
> +++ gcc/ipa-prop.cc    2023-02-22 11:34:15.572251634 +0100
> @@ -3849,7 +3849,8 @@ try_make_edge_direct_virtual_call (struc
>      if (can_refer)
>        {
>          if (!t
> -          || fndecl_built_in_p (t, BUILT_IN_UNREACHABLE)
> +          || fndecl_built_in_p (t, BUILT_IN_UNREACHABLE,
> +                       BUILT_IN_UNREACHABLE_TRAP)
>          || !possible_polymorphic_call_target_p
>               (ie, cgraph_node::get (t)))
>        {
> 
> 
>    Jakub
>