Use unspec_volatile on rdrand<mode>_1

gcc/

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

gcc/testsuite/

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

From-SVN: r187712

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a4eb0e6f197d0f222cfb902b0513a0845939485b..89d9a2f44042f4915c718528cf7b21ed87d389f7 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2012-05-21  H.J. Lu  <hongjiu.lu@intel.com>
+
+       Backport from mainline
+       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.
+
 2012-05-20  H.J. Lu  <hongjiu.lu@intel.com>
 
        Backport from mainline

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 42efde0d58e16d40dcbbbf7b5ab5b55464a5427e..c2db9cece5aa699aa8e6e20781e291dfdc8d62a3 100644 (file)
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -233,9 +233,6 @@
 
   ;; For BMI support
   UNSPEC_BEXTR
-
-  ;; For RDRAND support
-  UNSPEC_RDRAND
 ])
 
 (define_c_enum "unspecv" [
@@ -270,6 +267,9 @@
   UNSPECV_WRFSBASE
   UNSPECV_WRGSBASE
   UNSPECV_SPLIT_STACK_RETURN
+
+  ;; For RDRAND support
+  UNSPECV_RDRAND
 ])
 
 ;; Constants to represent pcomtrue/pcomfalse variants
@@ -18358,9 +18358,9 @@
 
 (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")

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 327205980e6abade015ab6da207fef2c238e46f7..bf146b83e52ff00c6df1893bb5c15008c94c88fe 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2012-05-21  H.J. Lu  <hongjiu.lu@intel.com>
+
+       Backport from mainline
+       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.
+
 2012-05-14  Uros Bizjak  <ubizjak@gmail.com>
 
        * gcc.target/i386/avx256-unaligned-load-[1234].c: Update scan strings.

diff --git a/gcc/testsuite/gcc.target/i386/pr53416.c b/gcc/testsuite/gcc.target/i386/pr53416.c
new file mode 100644 (file)
index 0000000..68abe8b
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr53416.c
@@ -0,0 +1,17 @@
+/* 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 } } */