i386: do not use SImode mul-highpart on 64-bit (PR 82418)

	PR target/82418
	* config/i386/i386.md (<s>mul<mode>3_highpart): Use DWIH mode iterator
	instead of SWI48.

testsuite/
	* gcc.target/i386/pr82418.c: New test.

From-SVN: r263467

gcc/ChangeLog

+2018-08-10  Alexander Monakov  <amonakov@ispras.ru>
+
+	PR target/82418
+	* config/i386/i386.md (<s>mul<mode>3_highpart): Use DWIH mode iterator
+	instead of SWI48.
+
 2018-08-10  Martin Liska  <mliska@suse.cz>
 
         PR target/83610

gcc/config/i386/i386.md

@@ -7792,16 +7792,16 @@
    (set_attr "mode" "QI")])
 
 (define_expand "<s>mul<mode>3_highpart"
-  [(parallel [(set (match_operand:SWI48 0 "register_operand")
-		   (truncate:SWI48
+  [(parallel [(set (match_operand:DWIH 0 "register_operand")
+		   (truncate:DWIH
 		     (lshiftrt:<DWI>
 		       (mult:<DWI>
 			 (any_extend:<DWI>
-			   (match_operand:SWI48 1 "nonimmediate_operand"))
+			   (match_operand:DWIH 1 "nonimmediate_operand"))
 			 (any_extend:<DWI>
-			   (match_operand:SWI48 2 "register_operand")))
+			   (match_operand:DWIH 2 "register_operand")))
 		       (match_dup 3))))
-	      (clobber (match_scratch:SWI48 4))
+	      (clobber (match_scratch:DWIH 4))
 	      (clobber (reg:CC FLAGS_REG))])]
   ""
   "operands[3] = GEN_INT (GET_MODE_BITSIZE (<MODE>mode));")

gcc/testsuite/ChangeLog

+2018-08-10  Alexander Monakov  <amonakov@ispras.ru>
+
+	PR target/82418
+	* gcc.target/i386/pr82418.c: New test.
+
 2018-08-10  Martin Liska  <mliska@suse.cz>
 
         PR target/83610

gcc/testsuite/gcc.target/i386/pr82418.c

+/* PR target/82418 */
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler "imul\[^\n\r]*1374389535" } } */
+
+unsigned
+f1(unsigned x)
+{
+  return x / 100;
+}