Fix invalid cc_status after [const_][us]mulsi3_highpart

	* config/m68k/m68k.md (umulsi3_highpart+1, const_umulsi3_highpart)
	(smulsi3_highpart+1, const_smulsi3_highpart): Add CC_STATUS_INIT.

testsuite/:
	* gcc.target/m68k/mulsi_highpart.c: New test.

From-SVN: r262835

gcc/ChangeLog

+2018-07-17  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* config/m68k/m68k.md (umulsi3_highpart+1, const_umulsi3_highpart)
+	(smulsi3_highpart+1, const_smulsi3_highpart): Add CC_STATUS_INIT.
+
 2018-07-17  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* config/arc/arc.c (arc_label_align): Use align_labels instead of

gcc/config/m68k/m68k.md

@@ -3240,7 +3240,10 @@
 	  (const_int 32))))
    (clobber (match_operand:SI 1 "register_operand" "=d"))]
   "TARGET_68020 && !TUNE_68060 && !TARGET_COLDFIRE"
-  "mulu%.l %3,%0:%1")
+{
+  CC_STATUS_INIT;
+  return "mulu%.l %3,%0:%1";
+})
 
 (define_insn "const_umulsi3_highpart"
   [(set (match_operand:SI 0 "register_operand" "=d")
@@ -3251,7 +3254,10 @@
 	  (const_int 32))))
    (clobber (match_operand:SI 1 "register_operand" "=d"))]
   "TARGET_68020 && !TUNE_68060 && !TARGET_COLDFIRE"
-  "mulu%.l %3,%0:%1")
+{
+  CC_STATUS_INIT;
+  return "mulu%.l %3,%0:%1";
+})
 
 (define_expand "smulsi3_highpart"
   [(parallel
@@ -3283,7 +3289,10 @@
 	  (const_int 32))))
    (clobber (match_operand:SI 1 "register_operand" "=d"))]
   "TARGET_68020 && !TUNE_68060 && !TARGET_COLDFIRE"
-  "muls%.l %3,%0:%1")
+{
+  CC_STATUS_INIT;
+  return "muls%.l %3,%0:%1";
+})
 
 (define_insn "const_smulsi3_highpart"
   [(set (match_operand:SI 0 "register_operand" "=d")
@@ -3294,7 +3303,10 @@
 	  (const_int 32))))
    (clobber (match_operand:SI 1 "register_operand" "=d"))]
   "TARGET_68020 && !TUNE_68060 && !TARGET_COLDFIRE"
-  "muls%.l %3,%0:%1")
+{
+  CC_STATUS_INIT;
+  return "muls%.l %3,%0:%1";
+})
 
 (define_expand "mul<mode>3"
   [(set (match_operand:FP 0 "nonimmediate_operand" "")

gcc/testsuite/ChangeLog

+2018-07-17  Andreas Schwab  <schwab@linux-m68k.org>
+
+	* gcc.target/m68k/mulsi_highpart.c: New test.
+
 2018-07-17  Jakub Jelinek  <jakub@redhat.com>
 
 	* gcc.dg/cpp/pr61854-c90.c (foo): Expect a note, rather than error.

gcc/testsuite/gcc.target/m68k/mulsi_highpart.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -m68020" } */
+/* Don't optimize away a compare after [us]mulsi_highpart.  */
+/* { dg-final { scan-assembler {tst\.?l} } } */
+int cmp (unsigned int a, unsigned int b)
+{
+  return (a > 0xffffffff / b);
+}