[gcc r13-5135] Sync LTO type_for_mode with c-family/

[Richard Biener <rguenth@gcc.gnu.org>]

https://gcc.gnu.org/g:9b6c624820050cd5e11b2fbd9c997f94b691295a

commit r13-5135-g9b6c624820050cd5e11b2fbd9c997f94b691295a
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Jan 13 08:11:53 2023 +0100

    Sync LTO type_for_mode with c-family/
    
    The following adds _FloatN mode support to the LTO copy of
    c_common_type_for_mode and also implements the fix for PR94072.
    
    gcc/lto/
            * lto-lang.cc (lto_type_for_mode): Sync with
            c_common_type_for_mode.

Diff:
---
 gcc/lto/lto-lang.cc | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/gcc/lto/lto-lang.cc b/gcc/lto/lto-lang.cc
index 7018dfae4a5..1b2a4a632bb 100644
--- a/gcc/lto/lto-lang.cc
+++ b/gcc/lto/lto-lang.cc
@@ -1004,6 +1004,11 @@ lto_type_for_mode (machine_mode mode, int unsigned_p)
   if (mode == TYPE_MODE (long_double_type_node))
     return long_double_type_node;
 
+  for (i = 0; i < NUM_FLOATN_NX_TYPES; i++)
+    if (FLOATN_NX_TYPE_NODE (i) != NULL_TREE
+	&& mode == TYPE_MODE (FLOATN_NX_TYPE_NODE (i)))
+      return FLOATN_NX_TYPE_NODE (i);
+
   if (mode == TYPE_MODE (void_type_node))
     return void_type_node;
 
@@ -1029,6 +1034,11 @@ lto_type_for_mode (machine_mode mode, int unsigned_p)
       if (mode == TYPE_MODE (complex_long_double_type_node))
 	return complex_long_double_type_node;
 
+      for (i = 0; i < NUM_FLOATN_NX_TYPES; i++)
+	if (COMPLEX_FLOATN_NX_TYPE_NODE (i) != NULL_TREE
+	    && mode == TYPE_MODE (COMPLEX_FLOATN_NX_TYPE_NODE (i)))
+	  return COMPLEX_FLOATN_NX_TYPE_NODE (i);
+
       if (mode == TYPE_MODE (complex_integer_type_node) && !unsigned_p)
 	return complex_integer_type_node;
 
@@ -1154,9 +1164,13 @@ lto_type_for_mode (machine_mode mode, int unsigned_p)
     }
 
   for (t = registered_builtin_types; t; t = TREE_CHAIN (t))
-    if (TYPE_MODE (TREE_VALUE (t)) == mode)
-      return TREE_VALUE (t);
-
+    {
+      tree type = TREE_VALUE (t);
+      if (TYPE_MODE (type) == mode
+	  && VECTOR_TYPE_P (type) == VECTOR_MODE_P (mode)
+	  && !!unsigned_p == !!TYPE_UNSIGNED (type))
+	return type;
+    }
   return NULL_TREE;
 }