[PATCH 02/52] d: Replace use of LONG_DOUBLE_TYPE_SIZE

[Kewen Lin]

Joseph pointed out "floating types should have their mode,
not a poorly defined precision value" in the discussion[1],
as he and Richi suggested, the existing macros
{FLOAT,{,LONG_}DOUBLE}_TYPE_SIZE will be replaced with a
hook mode_for_floating_type.  To be prepared for that, this
patch is to replace use of LONG_DOUBLE_TYPE_SIZE in d with
TYPE_PRECISION of long_double_type_node.

[1] https://gcc.gnu.org/pipermail/gcc-patches/2024-May/651209.html

gcc/d/ChangeLog:

        * d-target.cc (Target::_init): Use TYPE_PRECISION of
        long_double_type_node to replace LONG_DOUBLE_TYPE_SIZE.
---
 gcc/d/d-target.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/d/d-target.cc b/gcc/d/d-target.cc
index 127b9d7ce7c..079731f68ab 100644
--- a/gcc/d/d-target.cc
+++ b/gcc/d/d-target.cc
@@ -163,7 +163,8 @@ Target::_init (const Param &)
   this->c.intsize = (INT_TYPE_SIZE / BITS_PER_UNIT);
   this->c.longsize = (LONG_TYPE_SIZE / BITS_PER_UNIT);
   this->c.long_longsize = (LONG_LONG_TYPE_SIZE / BITS_PER_UNIT);
-  this->c.long_doublesize = (LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT);
+  this->c.long_doublesize
+    = (TYPE_PRECISION (long_double_type_node) / BITS_PER_UNIT);
   this->c.wchar_tsize = (WCHAR_TYPE_SIZE / BITS_PER_UNIT);
 
   this->c.bitFieldStyle = targetm.ms_bitfield_layout_p (unknown_type_node)
-- 
2.43.0