i386.md (*truncdfsf2_i387_1): New pattern.

	* config/i386/i386.md (*truncdfsf2_i387_1): New pattern.

	* fold-const.c (maybe_lvalue_p): Delete orphaned comment.

From-SVN: r97594

gcc/ChangeLog

+2005-04-04  Roger Sayle  <roger@eyesopen.com>
+
+	* config/i386/i386.md (*truncdfsf2_i387_1): New pattern.
+
+	* fold-const.c (maybe_lvalue_p): Delete orphaned comment.
+
 2005-04-04  Ian Lance Taylor  <ian@airs.com>
 
 	* c-typeck.c (struct c_switch): Rename switch_stmt field to

gcc/config/i386/i386.md

@@ -3787,6 +3787,22 @@
   [(set_attr "type" "fmov,multi")
    (set_attr "mode" "SF")])
 
+(define_insn "*truncdfsf2_i387_1"
+  [(set (match_operand:SF 0 "memory_operand" "=m")
+	(float_truncate:SF
+	  (match_operand:DF 1 "register_operand" "f")))]
+  "TARGET_80387
+   && !(TARGET_SSE2 && TARGET_SSE_MATH)
+   && !TARGET_MIX_SSE_I387"
+{
+  if (find_regno_note (insn, REG_DEAD, REGNO (operands[1])))
+    return "fstp%z0\t%y0";
+  else
+    return "fst%z0\t%y0";
+}
+  [(set_attr "type" "fmov")
+   (set_attr "mode" "SF")])
+
 (define_split
   [(set (match_operand:SF 0 "register_operand" "")
 	(float_truncate:SF

gcc/fold-const.c

@@ -2005,7 +2005,6 @@ fold_convert (tree type, tree arg)
 
 /* Return false if expr can be assumed not to be an value, true
    otherwise.  */
-/* Return an expr equal to X but certainly not valid as an lvalue.  */
 
 static bool
 maybe_lvalue_p (tree x)