Use unspec_volatile on rdrand<mode>_1

gcc/

	PR target/53416
	* config/i386/i386.md (UNSPEC_RDRAND): Renamed to ...
	(UNSPECV_RDRAND): This.
	(rdrand<mode>_1): Updated.

gcc/testsuite/

	PR target/53416
	* gcc.target/i386/pr53416.c: New file.

From-SVN: r187709

gcc/ChangeLog

+2012-05-21  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/53416
+	* config/i386/i386.md (UNSPEC_RDRAND): Renamed to ...
+	(UNSPECV_RDRAND): This.
+	(rdrand<mode>_1): Updated.
+
 2012-05-21  Richard Guenther  <rguenther@suse.de>
 
 	* tree-loop-distribution.c (can_generate_builtin): Reject

gcc/config/i386/i386.md

@@ -176,9 +176,6 @@
   ;; For CRC32 support
   UNSPEC_CRC32
 
-  ;; For RDRAND support
-  UNSPEC_RDRAND
-
   ;; For BMI support
   UNSPEC_BEXTR
 
@@ -208,6 +205,9 @@
   UNSPECV_WRFSBASE
   UNSPECV_WRGSBASE
 
+  ;; For RDRAND support
+  UNSPECV_RDRAND
+
   ;; For RTM support
   UNSPECV_XBEGIN
   UNSPECV_XEND
@@ -18403,9 +18403,9 @@
 
 (define_insn "rdrand<mode>_1"
   [(set (match_operand:SWI248 0 "register_operand" "=r")
-	(unspec:SWI248 [(const_int 0)] UNSPEC_RDRAND))
+	(unspec_volatile:SWI248 [(const_int 0)] UNSPECV_RDRAND))
    (set (reg:CCC FLAGS_REG)
-	(unspec:CCC [(const_int 0)] UNSPEC_RDRAND))]
+	(unspec_volatile:CCC [(const_int 0)] UNSPECV_RDRAND))]
   "TARGET_RDRND"
   "rdrand\t%0"
   [(set_attr "type" "other")

gcc/testsuite/ChangeLog

+2012-05-21  Uros Bizjak  <ubizjak@gmail.com>
+	    H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR target/53416
+	* gcc.target/i386/pr53416.c: New file.
+
 2012-05-21  Richard Guenther  <rguenther@suse.de>
 
 	* gfortran.dg/pr46519-2.f90: Adjust to avoid memset transform.

gcc/testsuite/gcc.target/i386/pr53416.c

+/* PR target/53416 */
+/* { dg-options "-O2 -mrdrnd" } */
+
+int test (void)
+{
+  unsigned int number = 0;
+  int result0, result1, result2, result3;
+
+  result0 = __builtin_ia32_rdrand32_step (&number);
+  result1 = __builtin_ia32_rdrand32_step (&number);
+  result2 = __builtin_ia32_rdrand32_step (&number);
+  result3 = __builtin_ia32_rdrand32_step (&number);
+
+  return result0 + result1 +result2 + result3;
+}
+
+/* { dg-final { scan-assembler-times "rdrand" 4 } } */