Use function_arg_info for TARGET_MUST_PASS_IN_STACK

The hook is passed the promoted mode instead of the original type mode.

The expr.h reference in the documentation is no longer correct, but
pointing to calls.h or calls.c doesn't help much either.  I just left
this as-is since it's not related to the point of the series.

After previous changes, most places already pass arg.mode and arg.type.
Only i386 and mcore needed to construct a new one out of nothing.
rs6000 needs to construct one slightly earlier than before.

2019-08-20  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* target.def (must_pass_in_stack): Take a function_arg_info instead
	of a mode and a type.
	* doc/tm.texi: Regenerate.
	* calls.h (must_pass_in_stack_var_size): Take a function_arg_info
	instead of a mode and a type.
	(must_pass_in_stack_var_size_or_pad): Likewise.
	* calls.c (must_pass_in_stack_var_size): Likewise.
	(must_pass_in_stack_var_size_or_pad): Likewise.
	(initialize_argument_information): Update call to
	targetm.calls.must_pass_in_stack.
	(must_pass_va_arg_on_stack): Likewise.
	* function.c (assign_parm_find_entry_rtl): Likewise.
	* targhooks.c (hook_pass_by_reference_must_pass_in_stack): Likewise.
	* config/alpha/alpha.c (alpha_function_arg): Likewise.
	(alpha_function_arg_advance): Likewise.
	* config/cr16/cr16.c (cr16_function_arg): Likewise.
	(cr16_function_arg_advance): Likewise.
	* config/cris/cris.c (cris_pass_by_reference): Likewise.
	(cris_arg_partial_bytes): Likewise.
	* config/iq2000/iq2000.c (iq2000_pass_by_reference): Likewise.
	* config/lm32/lm32.c (lm32_function_arg): Likewise.
	* config/mcore/mcore.c (mcore_num_arg_regs): Likewise.
	(mcore_function_arg, mcore_arg_partial_bytes): Likewise.
	* config/mips/mips.c (mips_pass_by_reference): Likewise.
	* config/mmix/mmix.c (mmix_function_arg_advance): Likewise.
	(mmix_function_arg_1, mmix_pass_by_reference): Likewise.
	* config/sh/sh.c (sh_pass_by_reference): Likewise.
	* config/stormy16/stormy16.c (xstormy16_function_arg): Likewise.
	* config/xtensa/xtensa.c (xtensa_function_arg_advance): Likewise.
	* config/arm/arm.c (arm_must_pass_in_stack): Take a function_arg_info
	instead of a mode and a type.
	* config/fr30/fr30.c (fr30_must_pass_in_stack): Likewise.
	(fr30_num_arg_regs): Likewise.
	(fr30_setup_incoming_varargs): Update calls accordingly.
	(fr30_arg_partial_bytes, fr30_function_arg): Likewise.
	(fr30_function_arg_advance): Likewise.
	* config/frv/frv.c (frv_must_pass_in_stack): Take a function_arg_info
	instead of a mode and a type.
	* config/gcn/gcn.c (num_arg_regs): Likewise.
	(gcn_function_arg, gcn_function_arg_advance): Update calls to
	num_arg_regs and targetm.calls.must_pass_in_stack.
	(gcn_arg_partial_bytes): Likewise.
	* config/i386/i386.c (ix86_must_pass_in_stack): Take a
	function_arg_info instead of a mode and a type.
	(classify_argument): Update call accordingly.
	* config/nds32/nds32.c (nds32_must_pass_in_stack): Take a
	function_arg_info instead of a mode and a type.
	* config/rs6000/rs6000-internal.h (rs6000_must_pass_in_stack):
	Likewise.
	* config/rs6000/rs6000-call.c (rs6000_must_pass_in_stack): Likewise.
	(rs6000_parm_needs_stack): Update call accordingly.
	(setup_incoming_varargs): Likewise.

From-SVN: r274703

1 files changed, 16 insertions, 16 deletions

diff --git a/gcc/calls.c b/gcc/calls.c
index 6be8acd38e3..1f691e84dfe 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -2139,7 +2139,7 @@ initialize_argument_information (int num_actuals ATTRIBUTE_UNUSED,
       if (args[i].reg)
 	args[i].partial = targetm.calls.arg_partial_bytes (args_so_far, arg);
 
-      args[i].pass_on_stack = targetm.calls.must_pass_in_stack (mode, type);
+      args[i].pass_on_stack = targetm.calls.must_pass_in_stack (arg);
 
       /* If FUNCTION_ARG returned a (parallel [(expr_list (nil) ...) ...]),
 	 it means that we are to pass this arg in the register(s) designated
@@ -5839,22 +5839,21 @@ store_one_arg (struct arg_data *arg, rtx argblock, int flags,
   return sibcall_failure;
 }
 
-/* Nonzero if we do not know how to pass TYPE solely in registers.  */
+/* Nonzero if we do not know how to pass ARG solely in registers.  */
 
 bool
-must_pass_in_stack_var_size (machine_mode mode ATTRIBUTE_UNUSED,
-			     const_tree type)
+must_pass_in_stack_var_size (const function_arg_info &arg)
 {
-  if (!type)
+  if (!arg.type)
     return false;
 
   /* If the type has variable size...  */
-  if (TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
+  if (TREE_CODE (TYPE_SIZE (arg.type)) != INTEGER_CST)
     return true;
 
   /* If the type is marked as addressable (it is required
      to be constructed into the stack)...  */
-  if (TREE_ADDRESSABLE (type))
+  if (TREE_ADDRESSABLE (arg.type))
     return true;
 
   return false;
@@ -5865,28 +5864,28 @@ must_pass_in_stack_var_size (machine_mode mode ATTRIBUTE_UNUSED,
 /* ??? Should be able to merge these two by examining BLOCK_REG_PADDING.  */
 
 bool
-must_pass_in_stack_var_size_or_pad (machine_mode mode, const_tree type)
+must_pass_in_stack_var_size_or_pad (const function_arg_info &arg)
 {
-  if (!type)
+  if (!arg.type)
     return false;
 
   /* If the type has variable size...  */
-  if (TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
+  if (TREE_CODE (TYPE_SIZE (arg.type)) != INTEGER_CST)
     return true;
 
   /* If the type is marked as addressable (it is required
      to be constructed into the stack)...  */
-  if (TREE_ADDRESSABLE (type))
+  if (TREE_ADDRESSABLE (arg.type))
     return true;
 
-  if (TYPE_EMPTY_P (type))
+  if (TYPE_EMPTY_P (arg.type))
     return false;
 
   /* If the padding and mode of the type is such that a copy into
      a register would put it into the wrong part of the register.  */
-  if (mode == BLKmode
-      && int_size_in_bytes (type) % (PARM_BOUNDARY / BITS_PER_UNIT)
-      && (targetm.calls.function_arg_padding (mode, type)
+  if (arg.mode == BLKmode
+      && int_size_in_bytes (arg.type) % (PARM_BOUNDARY / BITS_PER_UNIT)
+      && (targetm.calls.function_arg_padding (arg.mode, arg.type)
 	  == (BYTES_BIG_ENDIAN ? PAD_UPWARD : PAD_DOWNWARD)))
     return true;
 
@@ -5899,7 +5898,8 @@ must_pass_in_stack_var_size_or_pad (machine_mode mode, const_tree type)
 bool
 must_pass_va_arg_in_stack (tree type)
 {
-  return targetm.calls.must_pass_in_stack (TYPE_MODE (type), type);
+  function_arg_info arg (type, /*named=*/false);
+  return targetm.calls.must_pass_in_stack (arg);
 }
 
 /* Tell the garbage collector about GTY markers in this source file.  */