stor-layout.c (compute_record_type): Don't use mode of single field as mode of…

stor-layout.c (compute_record_type): Don't use mode of single field as mode of record if not integer mode of same type.

	* stor-layout.c (compute_record_type): Don't use mode of single
	field as mode of record if not integer mode of same type.

From-SVN: r35796

gcc/ChangeLog

@@ -6,13 +6,14 @@ Fri Aug 18 16:22:20 2000  Alexandre Oliva  <aoliva@redhat.com>
 	* configure.in: Get them included with `tm_file's.
 	* configure: Rebuilt.
 
-Fri Aug 18 16:01:18 2000  Alexandre Oliva  <aoliva@redhat.com>
-
 	* config/sh/sh.md (fpu_switch0, fpu_switch1): Simplify.
 	* config/sh/sh.c (fpscr_set_from_mem): Use them.
 
 Fri Aug 18 14:23:18 2000  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
+	* stor-layout.c (compute_record_type): Don't use mode of single
+	field as mode of record if not integer mode of same type.
+
 	* regmove.c (perhaps_ends_bb_p): New function.
 	(optimize_reg_copy_1, optimize_reg_copy_2): Call it.
 	(optimize_reg_copy_3, fixup_match_2, regmove_optimize): Likewise.

gcc/stor-layout.c

@@ -1062,8 +1062,11 @@ compute_record_mode (type)
 
       /* If this field is the whole struct, remember its mode so
 	 that, say, we can put a double in a class into a DF
-	 register instead of forcing it to live in the stack.  */
-      if (field == TYPE_FIELDS (type) && TREE_CHAIN (field) == 0)
+	 register instead of forcing it to live in the stack.  However,
+	 we don't support using such a mode if there is no integer mode
+	 of the same size, so don't set it here.  */
+      if (field == TYPE_FIELDS (type) && TREE_CHAIN (field) == 0
+	  && int_mode_for_mode (DECL_MODE (field)) != BLKmode)
 	mode = DECL_MODE (field);
 
 #ifdef STRUCT_FORCE_BLK