Index: gcc/target.def
===================================================================
--- gcc/target.def	2019-08-19 15:58:28.450077433 +0100
+++ gcc/target.def	2019-08-19 15:58:34.850031127 +0100
@@ -4486,8 +4486,8 @@ pass all their arguments on the stack.\n
 \n\
 The argument @var{args_so_far} points to the @code{CUMULATIVE_ARGS} data\n\
 structure, containing the values that are obtained after processing the\n\
-named arguments.  The arguments @var{mode} and @var{type} describe the\n\
-last named argument---its machine mode and its data type as a tree node.\n\
+named arguments.  The argument @var{arg} describes the last of these named\n\
+arguments.\n\
 \n\
 The target hook should do two things: first, push onto the stack all the\n\
 argument registers @emph{not} used for the named arguments, and second,\n\
@@ -4507,7 +4507,7 @@ arguments of the function are being anal
 happens for an inline function, which is not actually compiled until the\n\
 end of the source file.  The hook @code{TARGET_SETUP_INCOMING_VARARGS} should\n\
 not generate any instructions in this case.",
- void, (cumulative_args_t args_so_far, machine_mode mode, tree type,
+ void, (cumulative_args_t args_so_far, const function_arg_info &arg,
 	int *pretend_args_size, int second_time),
  default_setup_incoming_varargs)
 
Index: gcc/doc/tm.texi
===================================================================
--- gcc/doc/tm.texi	2019-08-19 15:58:28.450077433 +0100
+++ gcc/doc/tm.texi	2019-08-19 15:58:34.850031127 +0100
@@ -5202,7 +5202,7 @@ return value of this function should be
 to use as the return of @code{__builtin_saveregs}.
 @end deftypefn
 
-@deftypefn {Target Hook} void TARGET_SETUP_INCOMING_VARARGS (cumulative_args_t @var{args_so_far}, machine_mode @var{mode}, tree @var{type}, int *@var{pretend_args_size}, int @var{second_time})
+@deftypefn {Target Hook} void TARGET_SETUP_INCOMING_VARARGS (cumulative_args_t @var{args_so_far}, const function_arg_info @var{&arg}, int *@var{pretend_args_size}, int @var{second_time})
 This target hook offers an alternative to using
 @code{__builtin_saveregs} and defining the hook
 @code{TARGET_EXPAND_BUILTIN_SAVEREGS}.  Use it to store the anonymous
@@ -5213,8 +5213,8 @@ pass all their arguments on the stack.
 
 The argument @var{args_so_far} points to the @code{CUMULATIVE_ARGS} data
 structure, containing the values that are obtained after processing the
-named arguments.  The arguments @var{mode} and @var{type} describe the
-last named argument---its machine mode and its data type as a tree node.
+named arguments.  The argument @var{arg} describes the last of these named
+arguments.
 
 The target hook should do two things: first, push onto the stack all the
 argument registers @emph{not} used for the named arguments, and second,
Index: gcc/targhooks.h
===================================================================
--- gcc/targhooks.h	2019-08-19 15:58:28.450077433 +0100
+++ gcc/targhooks.h	2019-08-19 15:58:34.850031127 +0100
@@ -40,7 +40,9 @@ extern machine_mode default_cc_modes_com
 extern bool default_return_in_memory (const_tree, const_tree);
 
 extern rtx default_expand_builtin_saveregs (void);
-extern void default_setup_incoming_varargs (cumulative_args_t, machine_mode, tree, int *, int);
+extern void default_setup_incoming_varargs (cumulative_args_t,
+					    const function_arg_info &,
+					    int *, int);
 extern rtx default_builtin_setjmp_frame_value (void);
 extern bool default_pretend_outgoing_varargs_named (cumulative_args_t);
 
Index: gcc/targhooks.c
===================================================================
--- gcc/targhooks.c	2019-08-19 15:58:28.450077433 +0100
+++ gcc/targhooks.c	2019-08-19 15:58:34.850031127 +0100
@@ -193,11 +193,8 @@ default_expand_builtin_saveregs (void)
 }
 
 void
-default_setup_incoming_varargs (cumulative_args_t ca ATTRIBUTE_UNUSED,
-				machine_mode mode ATTRIBUTE_UNUSED,
-				tree type ATTRIBUTE_UNUSED,
-				int *pretend_arg_size ATTRIBUTE_UNUSED,
-				int second_time ATTRIBUTE_UNUSED)
+default_setup_incoming_varargs (cumulative_args_t,
+				const function_arg_info &, int *, int)
 {
 }
 
Index: gcc/config/aarch64/aarch64.c
===================================================================
--- gcc/config/aarch64/aarch64.c	2019-08-19 15:58:28.422077636 +0100
+++ gcc/config/aarch64/aarch64.c	2019-08-19 15:58:34.822031327 +0100
@@ -14511,9 +14511,9 @@ aarch64_gimplify_va_arg_expr (tree valis
 /* Implement TARGET_SETUP_INCOMING_VARARGS.  */
 
 static void
-aarch64_setup_incoming_varargs (cumulative_args_t cum_v, machine_mode mode,
-				tree type, int *pretend_size ATTRIBUTE_UNUSED,
-				int no_rtl)
+aarch64_setup_incoming_varargs (cumulative_args_t cum_v,
+				const function_arg_info &arg,
+				int *pretend_size ATTRIBUTE_UNUSED, int no_rtl)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   CUMULATIVE_ARGS local_cum;
@@ -14524,7 +14524,8 @@ aarch64_setup_incoming_varargs (cumulati
      argument.  Advance a local copy of CUM past the last "real" named
      argument, to find out how many registers are left over.  */
   local_cum = *cum;
-  aarch64_function_arg_advance (pack_cumulative_args(&local_cum), mode, type, true);
+  aarch64_function_arg_advance (pack_cumulative_args(&local_cum),
+				arg.mode, arg.type, arg.named);
 
   /* Found out how many registers we need to save.
      Honor tree-stdvar analysis results.  */
Index: gcc/config/alpha/alpha.c
===================================================================
--- gcc/config/alpha/alpha.c	2019-08-19 15:58:28.422077636 +0100
+++ gcc/config/alpha/alpha.c	2019-08-19 15:58:34.822031327 +0100
@@ -6090,14 +6090,15 @@ alpha_stdarg_optimize_hook (struct stdar
    variable number of arguments.  */
 
 static void
-alpha_setup_incoming_varargs (cumulative_args_t pcum, machine_mode mode,
-			      tree type, int *pretend_size, int no_rtl)
+alpha_setup_incoming_varargs (cumulative_args_t pcum,
+			      const function_arg_info &arg,
+			      int *pretend_size, int no_rtl)
 {
   CUMULATIVE_ARGS cum = *get_cumulative_args (pcum);
 
   /* Skip the current argument.  */
-  targetm.calls.function_arg_advance (pack_cumulative_args (&cum), mode, type,
-				      true);
+  targetm.calls.function_arg_advance (pack_cumulative_args (&cum),
+				      arg.mode, arg.type, arg.named);
 
 #if TARGET_ABI_OPEN_VMS
   /* For VMS, we allocate space for all 6 arg registers plus a count.
Index: gcc/config/arc/arc.c
===================================================================
--- gcc/config/arc/arc.c	2019-08-19 15:58:28.426077609 +0100
+++ gcc/config/arc/arc.c	2019-08-19 15:58:34.826031299 +0100
@@ -2415,12 +2415,12 @@ arc_double_limm_p (rtx value)
    create a register parameter block, and then copy any anonymous arguments
    in registers to memory.
 
-   CUM has not been updated for the last named argument which has type TYPE
-   and mode MODE, and we rely on this fact.  */
+   CUM has not been updated for the last named argument (which is given
+   by ARG), and we rely on this fact.  */
 
 static void
 arc_setup_incoming_varargs (cumulative_args_t args_so_far,
-			    machine_mode mode, tree type,
+			    const function_arg_info &arg,
 			    int *pretend_size, int no_rtl)
 {
   int first_anon_arg;
@@ -2430,7 +2430,7 @@ arc_setup_incoming_varargs (cumulative_a
 
   next_cum = *get_cumulative_args (args_so_far);
   arc_function_arg_advance (pack_cumulative_args (&next_cum),
-			    mode, type, true);
+			    arg.mode, arg.type, arg.named);
   first_anon_arg = next_cum;
 
   if (FUNCTION_ARG_REGNO_P (first_anon_arg))
Index: gcc/config/arm/arm.c
===================================================================
--- gcc/config/arm/arm.c	2019-08-19 15:58:28.430077578 +0100
+++ gcc/config/arm/arm.c	2019-08-19 15:58:34.830031272 +0100
@@ -212,8 +212,8 @@ static void arm_file_end (void);
 static void arm_file_start (void);
 static void arm_insert_attributes (tree, tree *);
 
-static void arm_setup_incoming_varargs (cumulative_args_t, machine_mode,
-					tree, int *, int);
+static void arm_setup_incoming_varargs (cumulative_args_t,
+					const function_arg_info &, int *, int);
 static bool arm_pass_by_reference (cumulative_args_t,
 				   const function_arg_info &);
 static bool arm_promote_prototypes (const_tree);
@@ -27054,8 +27054,7 @@ arm_output_load_gr (rtx *operands)
 
 static void
 arm_setup_incoming_varargs (cumulative_args_t pcum_v,
-			    machine_mode mode,
-			    tree type,
+			    const function_arg_info &arg,
 			    int *pretend_size,
 			    int second_time ATTRIBUTE_UNUSED)
 {
@@ -27068,17 +27067,17 @@ arm_setup_incoming_varargs (cumulative_a
       nregs = pcum->aapcs_ncrn;
       if (nregs & 1)
 	{
-	  int res = arm_needs_doubleword_align (mode, type);
+	  int res = arm_needs_doubleword_align (arg.mode, arg.type);
 	  if (res < 0 && warn_psabi)
 	    inform (input_location, "parameter passing for argument of "
-		    "type %qT changed in GCC 7.1", type);
+		    "type %qT changed in GCC 7.1", arg.type);
 	  else if (res > 0)
 	    {
 	      nregs++;
 	      if (res > 1 && warn_psabi)
 		inform (input_location,
 			"parameter passing for argument of type "
-			"%qT changed in GCC 9.1", type);
+			"%qT changed in GCC 9.1", arg.type);
 	    }
 	}
     }
Index: gcc/config/bfin/bfin.c
===================================================================
--- gcc/config/bfin/bfin.c	2019-08-19 15:58:28.430077578 +0100
+++ gcc/config/bfin/bfin.c	2019-08-19 15:58:34.830031272 +0100
@@ -540,7 +540,7 @@ expand_epilogue_reg_restore (rtx spreg,
 
    CUM is as above.
 
-   MODE and TYPE are the mode and type of the current parameter.
+   ARG is the last named argument.
 
    PRETEND_SIZE is a variable that should be set to the amount of stack
    that must be pushed by the prolog to pretend that our caller pushed
@@ -559,8 +559,7 @@ expand_epilogue_reg_restore (rtx spreg,
 
 static void
 setup_incoming_varargs (cumulative_args_t cum,
-			machine_mode mode ATTRIBUTE_UNUSED,
-			tree type ATTRIBUTE_UNUSED, int *pretend_size,
+			const function_arg_info &, int *pretend_size,
 			int no_rtl)
 {
   rtx mem;
Index: gcc/config/cris/cris.c
===================================================================
--- gcc/config/cris/cris.c	2019-08-19 15:58:28.430077578 +0100
+++ gcc/config/cris/cris.c	2019-08-19 15:58:34.834031241 +0100
@@ -108,8 +108,9 @@ static struct machine_function * cris_in
 
 static rtx cris_struct_value_rtx (tree, int);
 
-static void cris_setup_incoming_varargs (cumulative_args_t, machine_mode,
-					 tree type, int *, int);
+static void cris_setup_incoming_varargs (cumulative_args_t,
+					 const function_arg_info &,
+					 int *, int);
 
 static int cris_initial_frame_pointer_offset (void);
 
@@ -4021,8 +4022,7 @@ cris_struct_value_rtx (tree fntype ATTRI
 
 static void
 cris_setup_incoming_varargs (cumulative_args_t ca_v,
-			     machine_mode mode ATTRIBUTE_UNUSED,
-			     tree type ATTRIBUTE_UNUSED,
+			     const function_arg_info &,
 			     int *pretend_arg_size,
 			     int second_time)
 {
Index: gcc/config/csky/csky.c
===================================================================
--- gcc/config/csky/csky.c	2019-08-19 15:58:21.726126086 +0100
+++ gcc/config/csky/csky.c	2019-08-19 15:58:34.834031241 +0100
@@ -1937,8 +1937,7 @@ csky_arg_partial_bytes (cumulative_args_
 
 static void
 csky_setup_incoming_varargs (cumulative_args_t pcum_v,
-			     machine_mode mode,
-			     tree type,
+			     const function_arg_info &arg,
 			     int *pretend_size,
 			     int second_time ATTRIBUTE_UNUSED)
 {
@@ -1949,7 +1948,7 @@ csky_setup_incoming_varargs (cumulative_
 
   cfun->machine->uses_anonymous_args = 1;
   local_cum = *pcum;
-  csky_function_arg_advance (local_cum_v, mode, type, true);
+  csky_function_arg_advance (local_cum_v, arg.mode, arg.type, arg.named);
   regs_to_push = CSKY_NPARM_REGS - local_cum;
   if (regs_to_push)
     *pretend_size  = regs_to_push * UNITS_PER_WORD;
Index: gcc/config/epiphany/epiphany.c
===================================================================
--- gcc/config/epiphany/epiphany.c	2019-08-19 15:58:28.434077550 +0100
+++ gcc/config/epiphany/epiphany.c	2019-08-19 15:58:34.834031241 +0100
@@ -711,24 +711,25 @@ epiphany_function_arg_boundary (machine_
 /* Do any needed setup for a variadic function.  For the EPIPHANY, we
    actually emit the code in epiphany_expand_prologue.
 
-   CUM has not been updated for the last named argument which has type TYPE
-   and mode MODE, and we rely on this fact.  */
+   CUM has not been updated for the last named argument (which is given
+   by ARG), and we rely on this fact.  */
 
 
 static void
-epiphany_setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-				 tree type, int *pretend_size, int no_rtl)
+epiphany_setup_incoming_varargs (cumulative_args_t cum,
+				 const function_arg_info &arg,
+				 int *pretend_size, int no_rtl)
 {
   int first_anon_arg;
   CUMULATIVE_ARGS next_cum;
   machine_function_t *mf = MACHINE_FUNCTION (cfun);
 
   /* All BLKmode values are passed by reference.  */
-  gcc_assert (mode != BLKmode);
+  gcc_assert (arg.mode != BLKmode);
 
   next_cum = *get_cumulative_args (cum);
-  next_cum
-    = ROUND_ADVANCE_CUM (next_cum, mode, type) + ROUND_ADVANCE_ARG (mode, type);
+  next_cum = (ROUND_ADVANCE_CUM (next_cum, arg.mode, arg.type)
+	      + ROUND_ADVANCE_ARG (arg.mode, arg.type));
   first_anon_arg = next_cum;
 
   if (first_anon_arg < MAX_EPIPHANY_PARM_REGS && !no_rtl)
Index: gcc/config/fr30/fr30.c
===================================================================
--- gcc/config/fr30/fr30.c	2019-08-19 15:58:21.730126059 +0100
+++ gcc/config/fr30/fr30.c	2019-08-19 15:58:34.834031241 +0100
@@ -113,8 +113,9 @@ struct fr30_frame_info
 /* Zero structure to initialize current_frame_info.  */
 static struct fr30_frame_info 	zero_frame_info;
 
-static void fr30_setup_incoming_varargs (cumulative_args_t, machine_mode,
-					 tree, int *, int);
+static void fr30_setup_incoming_varargs (cumulative_args_t,
+					 const function_arg_info &,
+					 int *, int);
 static bool fr30_must_pass_in_stack (machine_mode, const_tree);
 static int fr30_arg_partial_bytes (cumulative_args_t,
 				   const function_arg_info &);
@@ -459,12 +460,11 @@ fr30_expand_epilogue (void)
    named argument, from registers into memory.  * copying actually done in
    fr30_expand_prologue().
 
-   ARG_REGS_USED_SO_FAR has *not* been updated for the last named argument
-   which has type TYPE and mode MODE, and we rely on this fact.  */
+   CUM has not been updated for the last named argument which has type TYPE
+   and mode MODE, and we rely on this fact.  */
 void
 fr30_setup_incoming_varargs (cumulative_args_t arg_regs_used_so_far_v,
-			     machine_mode mode,
-			     tree type ATTRIBUTE_UNUSED,
+			     const function_arg_info &arg,
 			     int *pretend_size,
 			     int second_time ATTRIBUTE_UNUSED)
 {
@@ -473,7 +473,7 @@ fr30_setup_incoming_varargs (cumulative_
   int size;
 
   /* All BLKmode values are passed by reference.  */
-  gcc_assert (mode != BLKmode);
+  gcc_assert (arg.mode != BLKmode);
 
   /* ??? This run-time test as well as the code inside the if
      statement is probably unnecessary.  */
@@ -481,7 +481,7 @@ fr30_setup_incoming_varargs (cumulative_
     /* If TARGET_STRICT_ARGUMENT_NAMING returns true, then the last named
        arg must not be treated as an anonymous arg.  */
     /* ??? This is a pointer increment, which makes no sense.  */
-    arg_regs_used_so_far += fr30_num_arg_regs (mode, type);
+    arg_regs_used_so_far += fr30_num_arg_regs (arg.mode, arg.type);
 
   size = FR30_NUM_ARG_REGS - (* arg_regs_used_so_far);
 
Index: gcc/config/frv/frv.c
===================================================================
--- gcc/config/frv/frv.c	2019-08-19 15:58:21.730126059 +0100
+++ gcc/config/frv/frv.c	2019-08-19 15:58:34.834031241 +0100
@@ -359,8 +359,8 @@ static bool frv_in_small_data_p			(const
 static void frv_asm_output_mi_thunk
   (FILE *, tree, HOST_WIDE_INT, HOST_WIDE_INT, tree);
 static void frv_setup_incoming_varargs		(cumulative_args_t,
-						 machine_mode,
-						 tree, int *, int);
+						 const function_arg_info &,
+						 int *, int);
 static rtx frv_expand_builtin_saveregs		(void);
 static void frv_expand_builtin_va_start		(tree, rtx);
 static bool frv_rtx_costs			(rtx, machine_mode, int, int,
@@ -2109,17 +2109,16 @@ frv_initial_elimination_offset (int from
 
 static void
 frv_setup_incoming_varargs (cumulative_args_t cum_v,
-                            machine_mode mode,
-                            tree type ATTRIBUTE_UNUSED,
-                            int *pretend_size,
-                            int second_time)
+			    const function_arg_info &arg,
+			    int *pretend_size,
+			    int second_time)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
 
   if (TARGET_DEBUG_ARG)
     fprintf (stderr,
 	     "setup_vararg: words = %2d, mode = %4s, pretend_size = %d, second_time = %d\n",
-	     *cum, GET_MODE_NAME (mode), *pretend_size, second_time);
+	     *cum, GET_MODE_NAME (arg.mode), *pretend_size, second_time);
 }
 
 
Index: gcc/config/ft32/ft32.c
===================================================================
--- gcc/config/ft32/ft32.c	2019-08-19 15:58:28.434077550 +0100
+++ gcc/config/ft32/ft32.c	2019-08-19 15:58:34.834031241 +0100
@@ -630,13 +630,12 @@ ft32_initial_elimination_offset (int fro
 
 static void
 ft32_setup_incoming_varargs (cumulative_args_t cum_v,
-			     machine_mode mode,
-			     tree type ATTRIBUTE_UNUSED,
+			     const function_arg_info &arg,
 			     int *pretend_size, int no_rtl ATTRIBUTE_UNUSED)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   int named_size =
-    GET_MODE_SIZE (SImode) * (*cum - FT32_R0) + GET_MODE_SIZE (mode);
+    GET_MODE_SIZE (SImode) * (*cum - FT32_R0) + GET_MODE_SIZE (arg.mode);
 
   if (named_size < 24)
     *pretend_size = 24 - named_size;
Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c	2019-08-19 15:58:28.434077550 +0100
+++ gcc/config/i386/i386.c	2019-08-19 15:58:34.838031214 +0100
@@ -4096,8 +4096,9 @@ setup_incoming_varargs_ms_64 (CUMULATIVE
 }
 
 static void
-ix86_setup_incoming_varargs (cumulative_args_t cum_v, machine_mode mode,
-			     tree type, int *, int no_rtl)
+ix86_setup_incoming_varargs (cumulative_args_t cum_v,
+			     const function_arg_info &arg,
+			     int *, int no_rtl)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   CUMULATIVE_ARGS next_cum;
@@ -4116,8 +4117,8 @@ ix86_setup_incoming_varargs (cumulative_
      For stdargs, we do want to skip the last named argument.  */
   next_cum = *cum;
   if (stdarg_p (fntype))
-    ix86_function_arg_advance (pack_cumulative_args (&next_cum), mode, type,
-			       true);
+    ix86_function_arg_advance (pack_cumulative_args (&next_cum),
+			       arg.mode, arg.type, arg.named);
 
   if (cum->call_abi == MS_ABI)
     setup_incoming_varargs_ms_64 (&next_cum);
Index: gcc/config/ia64/ia64.c
===================================================================
--- gcc/config/ia64/ia64.c	2019-08-19 15:58:21.734126028 +0100
+++ gcc/config/ia64/ia64.c	2019-08-19 15:58:34.838031214 +0100
@@ -199,8 +199,9 @@ static rtx gen_fr_restore_x (rtx, rtx, r
 static void ia64_option_override (void);
 static bool ia64_can_eliminate (const int, const int);
 static machine_mode hfa_element_mode (const_tree, bool);
-static void ia64_setup_incoming_varargs (cumulative_args_t, machine_mode,
-					 tree, int *, int);
+static void ia64_setup_incoming_varargs (cumulative_args_t,
+					 const function_arg_info &,
+					 int *, int);
 static int ia64_arg_partial_bytes (cumulative_args_t,
 				   const function_arg_info &);
 static rtx ia64_function_arg_1 (cumulative_args_t, machine_mode,
@@ -4585,19 +4586,21 @@ ia64_trampoline_init (rtx m_tramp, tree
 }
 
 /* Do any needed setup for a variadic function.  CUM has not been updated
-   for the last named argument which has type TYPE and mode MODE.
+   for the last named argument, which is given by ARG.
 
    We generate the actual spill instructions during prologue generation.  */
 
 static void
-ia64_setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-			     tree type, int * pretend_size,
+ia64_setup_incoming_varargs (cumulative_args_t cum,
+			     const function_arg_info &arg,
+			     int *pretend_size,
 			     int second_time ATTRIBUTE_UNUSED)
 {
   CUMULATIVE_ARGS next_cum = *get_cumulative_args (cum);
 
   /* Skip the current argument.  */
-  ia64_function_arg_advance (pack_cumulative_args (&next_cum), mode, type, 1);
+  ia64_function_arg_advance (pack_cumulative_args (&next_cum),
+			     arg.mode, arg.type, arg.named);
 
   if (next_cum.words < MAX_ARGUMENT_SLOTS)
     {
Index: gcc/config/iq2000/iq2000.c
===================================================================
--- gcc/config/iq2000/iq2000.c	2019-08-19 15:58:28.434077550 +0100
+++ gcc/config/iq2000/iq2000.c	2019-08-19 15:58:34.842031183 +0100
@@ -152,8 +152,8 @@ static void iq2000_init_builtins      (v
 static rtx  iq2000_expand_builtin     (tree, rtx, rtx, machine_mode, int);
 static bool iq2000_return_in_memory   (const_tree, const_tree);
 static void iq2000_setup_incoming_varargs (cumulative_args_t,
-					   machine_mode, tree, int *,
-					   int);
+					   const function_arg_info &,
+					   int *, int);
 static bool iq2000_rtx_costs          (rtx, machine_mode, int, int, int *, bool);
 static int  iq2000_address_cost       (rtx, machine_mode, addr_space_t,
 				       bool);
@@ -2894,9 +2894,8 @@ iq2000_return_in_memory (const_tree type
 
 static void
 iq2000_setup_incoming_varargs (cumulative_args_t cum_v,
-			       machine_mode mode ATTRIBUTE_UNUSED,
-			       tree type ATTRIBUTE_UNUSED, int * pretend_size,
-			       int no_rtl)
+			       const function_arg_info &,
+			       int *pretend_size, int no_rtl)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   unsigned int iq2000_off = ! cum->last_arg_fp; 
Index: gcc/config/lm32/lm32.c
===================================================================
--- gcc/config/lm32/lm32.c	2019-03-08 18:15:37.796736185 +0000
+++ gcc/config/lm32/lm32.c	2019-08-19 15:58:34.842031183 +0100
@@ -64,7 +64,7 @@ static void expand_save_restore (struct
 static void stack_adjust (HOST_WIDE_INT amount);
 static bool lm32_in_small_data_p (const_tree);
 static void lm32_setup_incoming_varargs (cumulative_args_t cum,
-					 machine_mode mode, tree type,
+					 const function_arg_info &,
 					 int *pretend_size, int no_rtl);
 static bool lm32_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno,
 			    int *total, bool speed);
@@ -684,8 +684,9 @@ lm32_compute_initial_elimination_offset
 }
 
 static void
-lm32_setup_incoming_varargs (cumulative_args_t cum_v, machine_mode mode,
-			     tree type, int *pretend_size, int no_rtl)
+lm32_setup_incoming_varargs (cumulative_args_t cum_v,
+			     const function_arg_info &arg,
+			     int *pretend_size, int no_rtl)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
   int first_anon_arg;
@@ -702,12 +703,7 @@ lm32_setup_incoming_varargs (cumulative_
          registers, if any used in passing this named paramter in
          order to determine which is the first registers used to pass
          anonymous arguments.  */
-      int size;
-
-      if (mode == BLKmode)
-	size = int_size_in_bytes (type);
-      else
-	size = GET_MODE_SIZE (mode);
+      int size = arg.promoted_size_in_bytes ();
 
       first_anon_arg =
 	*cum + LM32_FIRST_ARG_REG +
Index: gcc/config/m32r/m32r.c
===================================================================
--- gcc/config/m32r/m32r.c	2019-08-19 15:58:28.434077550 +0100
+++ gcc/config/m32r/m32r.c	2019-08-19 15:58:34.842031183 +0100
@@ -86,8 +86,9 @@ static bool m32r_return_in_memory (const
 static rtx m32r_function_value (const_tree, const_tree, bool);
 static rtx m32r_libcall_value (machine_mode, const_rtx);
 static bool m32r_function_value_regno_p (const unsigned int);
-static void m32r_setup_incoming_varargs (cumulative_args_t, machine_mode,
-					 tree, int *, int);
+static void m32r_setup_incoming_varargs (cumulative_args_t,
+					 const function_arg_info &,
+					 int *, int);
 static void init_idents (void);
 static bool m32r_rtx_costs (rtx, machine_mode, int, int, int *, bool speed);
 static int m32r_memory_move_cost (machine_mode, reg_class_t, bool);
@@ -1280,12 +1281,13 @@ m32r_function_value_regno_p (const unsig
    create a register parameter block, and then copy any anonymous arguments
    in registers to memory.
 
-   CUM has not been updated for the last named argument which has type TYPE
-   and mode MODE, and we rely on this fact.  */
+   CUM has not been updated for the last named argument (which is given
+   by ARG), and we rely on this fact.  */
 
 static void
-m32r_setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-			     tree type, int *pretend_size, int no_rtl)
+m32r_setup_incoming_varargs (cumulative_args_t cum,
+			     const function_arg_info &arg,
+			     int *pretend_size, int no_rtl)
 {
   int first_anon_arg;
 
@@ -1293,10 +1295,11 @@ m32r_setup_incoming_varargs (cumulative_
     return;
 
   /* All BLKmode values are passed by reference.  */
-  gcc_assert (mode != BLKmode);
+  gcc_assert (arg.mode != BLKmode);
 
-  first_anon_arg = (ROUND_ADVANCE_CUM (*get_cumulative_args (cum), mode, type)
-		    + ROUND_ADVANCE_ARG (mode, type));
+  first_anon_arg = (ROUND_ADVANCE_CUM (*get_cumulative_args (cum),
+				       arg.mode, arg.type)
+		    + ROUND_ADVANCE_ARG (arg.mode, arg.type));
 
   if (first_anon_arg < M32R_MAX_PARM_REGS)
     {
Index: gcc/config/mcore/mcore.c
===================================================================
--- gcc/config/mcore/mcore.c	2019-08-19 15:58:21.734126028 +0100
+++ gcc/config/mcore/mcore.c	2019-08-19 15:58:34.842031183 +0100
@@ -99,7 +99,9 @@ static int        calc_live_regs
 static int        try_constant_tricks           (HOST_WIDE_INT, HOST_WIDE_INT *, HOST_WIDE_INT *);
 static const char *     output_inline_const     (machine_mode, rtx *);
 static void       layout_mcore_frame            (struct mcore_frame *);
-static void       mcore_setup_incoming_varargs	(cumulative_args_t, machine_mode, tree, int *, int);
+static void       mcore_setup_incoming_varargs	(cumulative_args_t,
+						 const function_arg_info &,
+						 int *, int);
 static cond_type  is_cond_candidate             (rtx);
 static rtx_insn  *emit_new_cond_insn            (rtx_insn *, int);
 static rtx_insn  *conditionalize_block          (rtx_insn *);
@@ -1942,7 +1944,7 @@ mcore_initial_elimination_offset (int fr
 
 static void
 mcore_setup_incoming_varargs (cumulative_args_t args_so_far_v,
-			      machine_mode mode, tree type,
+			      const function_arg_info &arg,
 			      int * ptr_pretend_size ATTRIBUTE_UNUSED,
 			      int second_time ATTRIBUTE_UNUSED)
 {
@@ -1953,7 +1955,8 @@ mcore_setup_incoming_varargs (cumulative
   /* We need to know how many argument registers are used before
      the varargs start, so that we can push the remaining argument
      registers during the prologue.  */
-  number_of_regs_before_varargs = *args_so_far + mcore_num_arg_regs (mode, type);
+  number_of_regs_before_varargs
+    = *args_so_far + mcore_num_arg_regs (arg.mode, arg.type);
   
   /* There is a bug somewhere in the arg handling code.
      Until I can find it this workaround always pushes the
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c	2019-08-19 15:58:28.438077523 +0100
+++ gcc/config/mips/mips.c	2019-08-19 15:58:34.842031183 +0100
@@ -6544,9 +6544,9 @@ mips_return_in_memory (const_tree type,
 /* Implement TARGET_SETUP_INCOMING_VARARGS.  */
 
 static void
-mips_setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-			     tree type, int *pretend_size ATTRIBUTE_UNUSED,
-			     int no_rtl)
+mips_setup_incoming_varargs (cumulative_args_t cum,
+			     const function_arg_info &arg,
+			     int *pretend_size ATTRIBUTE_UNUSED, int no_rtl)
 {
   CUMULATIVE_ARGS local_cum;
   int gp_saved, fp_saved;
@@ -6555,8 +6555,8 @@ mips_setup_incoming_varargs (cumulative_
      argument.  Advance a local copy of CUM past the last "real" named
      argument, to find out how many registers are left over.  */
   local_cum = *get_cumulative_args (cum);
-  mips_function_arg_advance (pack_cumulative_args (&local_cum), mode, type,
-			     true);
+  mips_function_arg_advance (pack_cumulative_args (&local_cum),
+			     arg.mode, arg.type, arg.named);
 
   /* Found out how many registers we need to save.  */
   gp_saved = MAX_ARGS_IN_REGISTERS - local_cum.num_gprs;
Index: gcc/config/mmix/mmix.c
===================================================================
--- gcc/config/mmix/mmix.c	2019-08-19 15:58:28.438077523 +0100
+++ gcc/config/mmix/mmix.c	2019-08-19 15:58:34.842031183 +0100
@@ -138,7 +138,7 @@ static void mmix_reorg (void);
 static void mmix_asm_output_mi_thunk
   (FILE *, tree, HOST_WIDE_INT, HOST_WIDE_INT, tree);
 static void mmix_setup_incoming_varargs
-  (cumulative_args_t, machine_mode, tree, int *, int);
+  (cumulative_args_t, const function_arg_info &, int *, int);
 static void mmix_file_start (void);
 static void mmix_file_end (void);
 static void mmix_init_libfuncs (void);
@@ -960,8 +960,7 @@ mmix_function_profiler (FILE *stream ATT
 
 static void
 mmix_setup_incoming_varargs (cumulative_args_t args_so_farp_v,
-			     machine_mode mode,
-			     tree vartype,
+			     const function_arg_info &arg,
 			     int *pretend_sizep,
 			     int second_time ATTRIBUTE_UNUSED)
 {
@@ -974,7 +973,7 @@ mmix_setup_incoming_varargs (cumulative_
 
   /* We assume that one argument takes up one register here.  That should
      be true until we start messing with multi-reg parameters.  */
-  if ((7 + (MMIX_FUNCTION_ARG_SIZE (mode, vartype))) / 8 != 1)
+  if ((7 + (MMIX_FUNCTION_ARG_SIZE (arg.mode, arg.type))) / 8 != 1)
     internal_error ("MMIX Internal: Last named vararg would not fit in a register");
 }
 
Index: gcc/config/moxie/moxie.c
===================================================================
--- gcc/config/moxie/moxie.c	2019-08-19 15:58:28.438077523 +0100
+++ gcc/config/moxie/moxie.c	2019-08-19 15:58:34.842031183 +0100
@@ -385,8 +385,7 @@ moxie_initial_elimination_offset (int fr
 
 static void
 moxie_setup_incoming_varargs (cumulative_args_t cum_v,
-			      machine_mode mode ATTRIBUTE_UNUSED,
-			      tree type ATTRIBUTE_UNUSED,
+			      const function_arg_info &,
 			      int *pretend_size, int no_rtl)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
Index: gcc/config/nds32/nds32.c
===================================================================
--- gcc/config/nds32/nds32.c	2019-08-19 15:58:21.738126000 +0100
+++ gcc/config/nds32/nds32.c	2019-08-19 15:58:34.846031154 +0100
@@ -2345,8 +2345,7 @@ nds32_warn_func_return (tree decl)
 
 static void
 nds32_setup_incoming_varargs (cumulative_args_t ca,
-			      machine_mode mode,
-			      tree type,
+			      const function_arg_info &arg,
 			      int *pretend_args_size,
 			      int second_time ATTRIBUTE_UNUSED)
 {
@@ -2370,14 +2369,14 @@ nds32_setup_incoming_varargs (cumulative
 
   cum = get_cumulative_args (ca);
 
-  /* The MODE and TYPE describe the last argument.
+  /* ARG describes the last argument.
      We need those information to determine the remaining registers
      for varargs.  */
   total_args_regs
     = NDS32_MAX_GPR_REGS_FOR_ARGS + NDS32_GPR_ARG_FIRST_REGNUM;
   num_of_used_regs
-    = NDS32_AVAILABLE_REGNUM_FOR_GPR_ARG (cum->gpr_offset, mode, type)
-      + NDS32_NEED_N_REGS_FOR_ARG (mode, type);
+    = NDS32_AVAILABLE_REGNUM_FOR_GPR_ARG (cum->gpr_offset, arg.mode, arg.type)
+      + NDS32_NEED_N_REGS_FOR_ARG (arg.mode, arg.type);
 
   remaining_reg_count = total_args_regs - num_of_used_regs;
   *pretend_args_size = remaining_reg_count * UNITS_PER_WORD;
Index: gcc/config/nios2/nios2.c
===================================================================
--- gcc/config/nios2/nios2.c	2019-08-19 15:58:21.738126000 +0100
+++ gcc/config/nios2/nios2.c	2019-08-19 15:58:34.846031154 +0100
@@ -3516,8 +3516,8 @@ nios2_return_in_memory (const_tree type,
    own va_arg type.  */
 static void
 nios2_setup_incoming_varargs (cumulative_args_t cum_v,
-                              machine_mode mode, tree type,
-                              int *pretend_size, int second_time)
+			      const function_arg_info &arg,
+			      int *pretend_size, int second_time)
 {
   CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); 
   CUMULATIVE_ARGS local_cum;
@@ -3527,7 +3527,7 @@ nios2_setup_incoming_varargs (cumulative
 
   cfun->machine->uses_anonymous_args = 1;
   local_cum = *cum;
-  nios2_function_arg_advance (local_cum_v, mode, type, true);
+  nios2_function_arg_advance (local_cum_v, arg.mode, arg.type, arg.named);
 
   regs_to_push = NUM_ARG_REGS - local_cum.regs_used;
 
Index: gcc/config/riscv/riscv.c
===================================================================
--- gcc/config/riscv/riscv.c	2019-08-19 15:58:28.442077491 +0100
+++ gcc/config/riscv/riscv.c	2019-08-19 15:58:34.846031154 +0100
@@ -2854,9 +2854,9 @@ riscv_return_in_memory (const_tree type,
 /* Implement TARGET_SETUP_INCOMING_VARARGS.  */
 
 static void
-riscv_setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-			     tree type, int *pretend_size ATTRIBUTE_UNUSED,
-			     int no_rtl)
+riscv_setup_incoming_varargs (cumulative_args_t cum,
+			      const function_arg_info &arg,
+			      int *pretend_size ATTRIBUTE_UNUSED, int no_rtl)
 {
   CUMULATIVE_ARGS local_cum;
   int gp_saved;
@@ -2865,7 +2865,8 @@ riscv_setup_incoming_varargs (cumulative
      argument.  Advance a local copy of CUM past the last "real" named
      argument, to find out how many registers are left over.  */
   local_cum = *get_cumulative_args (cum);
-  riscv_function_arg_advance (pack_cumulative_args (&local_cum), mode, type, 1);
+  riscv_function_arg_advance (pack_cumulative_args (&local_cum),
+			      arg.mode, arg.type, arg.named);
 
   /* Found out how many registers we need to save.  */
   gp_saved = MAX_ARGS_IN_REGISTERS - local_cum.num_gprs;
Index: gcc/config/rs6000/rs6000-internal.h
===================================================================
--- gcc/config/rs6000/rs6000-internal.h	2019-08-19 15:58:28.442077491 +0100
+++ gcc/config/rs6000/rs6000-internal.h	2019-08-19 15:58:34.846031154 +0100
@@ -152,9 +152,8 @@ extern bool rs6000_return_in_memory (con
 extern bool rs6000_return_in_msb (const_tree valtype);
 extern bool rs6000_pass_by_reference (cumulative_args_t,
 				      const function_arg_info &);
-extern void setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-				    tree type, int *pretend_size ATTRIBUTE_UNUSED,
-				    int no_rtl);
+extern void setup_incoming_varargs (cumulative_args_t,
+				    const function_arg_info &, int *, int);
 extern unsigned int rs6000_function_arg_boundary (machine_mode mode,
 						  const_tree type);
 extern bool rs6000_must_pass_in_stack (machine_mode mode, const_tree type);
Index: gcc/config/rs6000/rs6000-call.c
===================================================================
--- gcc/config/rs6000/rs6000-call.c	2019-08-19 15:58:28.442077491 +0100
+++ gcc/config/rs6000/rs6000-call.c	2019-08-19 15:58:34.846031154 +0100
@@ -2365,7 +2365,7 @@ rs6000_move_block_from_reg (int regno, r
 
    CUM is as above.
 
-   MODE and TYPE are the mode and type of the current parameter.
+   ARG is the last named argument.
 
    PRETEND_SIZE is a variable that should be set to the amount of stack
    that must be pushed by the prolog to pretend that our caller pushed
@@ -2375,9 +2375,9 @@ rs6000_move_block_from_reg (int regno, r
    stack and set PRETEND_SIZE to the length of the registers pushed.  */
 
 void
-setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-			tree type, int *pretend_size ATTRIBUTE_UNUSED,
-			int no_rtl)
+setup_incoming_varargs (cumulative_args_t cum,
+			const function_arg_info &arg,
+			int *pretend_size ATTRIBUTE_UNUSED, int no_rtl)
 {
   CUMULATIVE_ARGS next_cum;
   int reg_size = TARGET_32BIT ? 4 : 8;
@@ -2387,7 +2387,7 @@ setup_incoming_varargs (cumulative_args_
 
   /* Skip the last named argument.  */
   next_cum = *get_cumulative_args (cum);
-  rs6000_function_arg_advance_1 (&next_cum, mode, type, true, 0);
+  rs6000_function_arg_advance_1 (&next_cum, arg.mode, arg.type, arg.named, 0);
 
   if (DEFAULT_ABI == ABI_V4)
     {
@@ -2461,8 +2461,8 @@ setup_incoming_varargs (cumulative_args_
       first_reg_offset = next_cum.words;
       save_area = crtl->args.internal_arg_pointer;
 
-      if (targetm.calls.must_pass_in_stack (mode, type))
-	first_reg_offset += rs6000_arg_size (TYPE_MODE (type), type);
+      if (targetm.calls.must_pass_in_stack (arg.mode, arg.type))
+	first_reg_offset += rs6000_arg_size (TYPE_MODE (arg.type), arg.type);
     }
 
   set = get_varargs_alias_set ();
Index: gcc/config/sh/sh.c
===================================================================
--- gcc/config/sh/sh.c	2019-08-19 15:58:28.446077464 +0100
+++ gcc/config/sh/sh.c	2019-08-19 15:58:34.846031154 +0100
@@ -280,8 +280,8 @@ static bool sh_function_value_regno_p (c
 static rtx sh_libcall_value (machine_mode, const_rtx);
 static bool sh_return_in_memory (const_tree, const_tree);
 static rtx sh_builtin_saveregs (void);
-static void sh_setup_incoming_varargs (cumulative_args_t, machine_mode,
-				       tree, int *, int);
+static void sh_setup_incoming_varargs (cumulative_args_t,
+				       const function_arg_info &, int *, int);
 static bool sh_strict_argument_naming (cumulative_args_t);
 static bool sh_pretend_outgoing_varargs_named (cumulative_args_t);
 static void sh_atomic_assign_expand_fenv (tree *, tree *, tree *);
@@ -8184,8 +8184,7 @@ sh_return_in_memory (const_tree type, co
    function that tell if a function uses varargs or stdarg.  */
 static void
 sh_setup_incoming_varargs (cumulative_args_t ca,
-			   machine_mode mode,
-			   tree type,
+			   const function_arg_info &arg,
 			   int *pretend_arg_size,
 			   int second_time ATTRIBUTE_UNUSED)
 {
@@ -8194,10 +8193,9 @@ sh_setup_incoming_varargs (cumulative_ar
     {
       int named_parm_regs, anon_parm_regs;
 
-      named_parm_regs = (sh_round_reg (*get_cumulative_args (ca), mode)
-			 + (mode == BLKmode
-			    ? CEIL (int_size_in_bytes (type), UNITS_PER_WORD)
-			    : CEIL (GET_MODE_SIZE (mode), UNITS_PER_WORD)));
+      named_parm_regs = (sh_round_reg (*get_cumulative_args (ca), arg.mode)
+			 + CEIL (arg.promoted_size_in_bytes (),
+				 UNITS_PER_WORD));
       anon_parm_regs = NPARM_REGS (SImode) - named_parm_regs;
       if (anon_parm_regs > 0)
 	*pretend_arg_size = anon_parm_regs * 4;
Index: gcc/config/spu/spu.c
===================================================================
--- gcc/config/spu/spu.c	2019-08-19 15:58:28.446077464 +0100
+++ gcc/config/spu/spu.c	2019-08-19 15:58:34.846031154 +0100
@@ -4089,8 +4089,9 @@ spu_gimplify_va_arg_expr (tree valist, t
    in the stack then save no registers.  Set pretend_args_size to the
    amount of space needed to save the registers. */
 static void
-spu_setup_incoming_varargs (cumulative_args_t cum, machine_mode mode,
-			    tree type, int *pretend_size, int no_rtl)
+spu_setup_incoming_varargs (cumulative_args_t cum,
+			    const function_arg_info &arg,
+			    int *pretend_size, int no_rtl)
 {
   if (!no_rtl)
     {
@@ -4101,7 +4102,8 @@ spu_setup_incoming_varargs (cumulative_a
 
       /* cum currently points to the last named argument, we want to
          start at the next argument. */
-      spu_function_arg_advance (pack_cumulative_args (&ncum), mode, type, true);
+      spu_function_arg_advance (pack_cumulative_args (&ncum),
+				arg.mode, arg.type, arg.named);
 
       offset = -STACK_POINTER_OFFSET;
       for (regno = ncum; regno < MAX_REGISTER_ARGS; regno++)
Index: gcc/config/tilegx/tilegx.c
===================================================================
--- gcc/config/tilegx/tilegx.c	2019-08-19 15:58:28.446077464 +0100
+++ gcc/config/tilegx/tilegx.c	2019-08-19 15:58:34.850031127 +0100
@@ -390,8 +390,8 @@ tilegx_va_start (tree valist, rtx nextar
 /* Implement TARGET_SETUP_INCOMING_VARARGS.  */
 static void
 tilegx_setup_incoming_varargs (cumulative_args_t cum,
-			       machine_mode mode,
-			       tree type, int *pretend_args, int no_rtl)
+			       const function_arg_info &arg,
+			       int *pretend_args, int no_rtl)
 {
   CUMULATIVE_ARGS local_cum = *get_cumulative_args (cum);
   int first_reg;
@@ -400,7 +400,7 @@ tilegx_setup_incoming_varargs (cumulativ
      argument.  Advance a local copy of CUM past the last "real" named
      argument, to find out how many registers are left over.  */
   targetm.calls.function_arg_advance (pack_cumulative_args (&local_cum),
-				      mode, type, true);
+				      arg.mode, arg.type, arg.named);
   first_reg = local_cum;
 
   if (local_cum < TILEGX_NUM_ARG_REGS)
Index: gcc/config/tilepro/tilepro.c
===================================================================
--- gcc/config/tilepro/tilepro.c	2019-08-19 15:58:28.446077464 +0100
+++ gcc/config/tilepro/tilepro.c	2019-08-19 15:58:34.850031127 +0100
@@ -342,8 +342,8 @@ tilepro_va_start (tree valist, rtx nexta
 /* Implement TARGET_SETUP_INCOMING_VARARGS.  */
 static void
 tilepro_setup_incoming_varargs (cumulative_args_t cum,
-				machine_mode mode,
-				tree type, int *pretend_args, int no_rtl)
+				const function_arg_info &arg,
+				int *pretend_args, int no_rtl)
 {
   CUMULATIVE_ARGS local_cum = *get_cumulative_args (cum);
   int first_reg;
@@ -352,7 +352,7 @@ tilepro_setup_incoming_varargs (cumulati
      argument.  Advance a local copy of CUM past the last "real" named
      argument, to find out how many registers are left over.  */
   targetm.calls.function_arg_advance (pack_cumulative_args (&local_cum),
-				      mode, type, true);
+				      arg.mode, arg.type, arg.named);
   first_reg = local_cum;
 
   if (local_cum < TILEPRO_NUM_ARG_REGS)
Index: gcc/config/visium/visium.c
===================================================================
--- gcc/config/visium/visium.c	2019-08-19 15:58:28.446077464 +0100
+++ gcc/config/visium/visium.c	2019-08-19 15:58:34.850031127 +0100
@@ -175,8 +175,8 @@ static rtx visium_function_value (const_
 static rtx visium_libcall_value (machine_mode, const_rtx);
 
 static void visium_setup_incoming_varargs (cumulative_args_t,
-					   machine_mode,
-					   tree, int *, int);
+					   const function_arg_info &,
+					   int *, int);
 
 static void visium_va_start (tree valist, rtx nextarg);
 
@@ -1460,8 +1460,7 @@ visium_libcall_value (machine_mode mode,
 
 static void
 visium_setup_incoming_varargs (cumulative_args_t pcum_v,
-			       machine_mode mode,
-			       tree type,
+			       const function_arg_info &arg,
 			       int *pretend_size ATTRIBUTE_UNUSED,
 			       int no_rtl)
 {
@@ -1487,7 +1486,8 @@ visium_setup_incoming_varargs (cumulativ
   /* The caller has advanced ARGS_SO_FAR up to, but not beyond, the last named
      argument.  Advance a local copy of ARGS_SO_FAR past the last "real" named
      argument, to find out how many registers are left over.  */
-  TARGET_FUNCTION_ARG_ADVANCE (local_args_so_far, mode, type, 1);
+  TARGET_FUNCTION_ARG_ADVANCE (local_args_so_far, arg.mode,
+			       arg.type, arg.named);
 
   /* Find how many registers we need to save.  */
   locargs = get_cumulative_args (local_args_so_far);
Index: gcc/function.c
===================================================================
--- gcc/function.c	2019-08-19 15:58:28.450077433 +0100
+++ gcc/function.c	2019-08-19 15:58:34.850031127 +0100
@@ -2485,9 +2485,9 @@ assign_parms_setup_varargs (struct assig
 {
   int varargs_pretend_bytes = 0;
 
-  targetm.calls.setup_incoming_varargs (all->args_so_far,
-					data->promoted_mode,
-					data->passed_type,
+  function_arg_info last_named_arg (data->passed_type, data->promoted_mode,
+				    /*named=*/true);
+  targetm.calls.setup_incoming_varargs (all->args_so_far, last_named_arg,
 					&varargs_pretend_bytes, no_rtl);
 
   /* If the back-end has requested extra stack space, record how much is
