[Patch AArch64] Add rcpc extension

gcc/

	* config/aarch64/aarch64-option-extensions.def (rcpc): New.
	* config/aarch64/aarch64.h (AARCH64_FL_RCPC): New.

From-SVN: r249414

gcc/ChangeLog

 2017-06-20  James Greenhalgh  <james.greenhalgh@arm.com>
 
+	* config/aarch64/aarch64-option-extensions.def (rcpc): New.
+	* config/aarch64/aarch64.h (AARCH64_FL_RCPC): New.
+
+2017-06-20  James Greenhalgh  <james.greenhalgh@arm.com>
+
 	* config/aarch64/aarch64-option-extensions.def (fp16): Fix expected
 	feature string.
 

gcc/config/aarch64/aarch64-option-extensions.def

@@ -60,4 +60,7 @@ AARCH64_OPT_EXTENSION("lse", AARCH64_FL_LSE, 0, 0, "atomics")
    Disabling "fp16" just disables "fp16".  */
 AARCH64_OPT_EXTENSION("fp16", AARCH64_FL_F16, AARCH64_FL_FP, 0, "fphp asimdhp")
 
+/* Enabling or disabling "rcpc" only changes "rcpc".  */
+AARCH64_OPT_EXTENSION("rcpc", AARCH64_FL_RCPC, 0, 0, "lrcpc")
+
 #undef AARCH64_OPT_EXTENSION

gcc/config/aarch64/aarch64.h

@@ -140,6 +140,7 @@ extern unsigned aarch64_architecture_version;
 #define AARCH64_FL_F16	      (1 << 9)  /* Has ARMv8.2-A FP16 extensions.  */
 /* ARMv8.3-A architecture extensions.  */
 #define AARCH64_FL_V8_3	      (1 << 10)  /* Has ARMv8.3-A features.  */
+#define AARCH64_FL_RCPC	      (1 << 11)  /* Has support for RCpc model.  */
 
 /* Has FP and SIMD.  */
 #define AARCH64_FL_FPSIMD     (AARCH64_FL_FP | AARCH64_FL_SIMD)