[AArch64 2/3 big.LITTLE] Allow tuning parameters without unique tuning targets.

gcc/

	* config/aarch64/aarch64-cores.def: Add new column for
	SCHEDULER_IDENT.
	* config/aarch64/aarch64-opts.h (AARCH64_CORE): Handle
	SCHEDULER_IDENT.
	* config/aarch64/aarch64.c (AARCH64_CORE): Handle
	SCHEDULER_IDENT.
	(aarch64_parse_cpu): mcpu implies a default value for mtune.
	* config/aarch64/aarch64.h (AARCH64_CORE): Handle
	SCHEDULER_IDENT.

From-SVN: r206099

gcc/ChangeLog

 2013-12-18  James Greenhalgh  <james.greenhalgh@arm.com>
 
+	* config/aarch64/aarch64-cores.def: Add new column for
+	SCHEDULER_IDENT.
+	* config/aarch64/aarch64-opts.h (AARCH64_CORE): Handle
+	SCHEDULER_IDENT.
+	* config/aarch64/aarch64.c (AARCH64_CORE): Handle
+	SCHEDULER_IDENT.
+	(aarch64_parse_cpu): mcpu implies a default value for mtune.
+	* config/aarch64/aarch64.h (AARCH64_CORE): Handle
+	SCHEDULER_IDENT.
+
+2013-12-18  James Greenhalgh  <james.greenhalgh@arm.com>
+
 	* common/config/aarch64/aarch64-common.c
 	(aarch64_rewrite_selected_cpu): New.
 	(aarch64_rewrite_mcpu): New.

gcc/config/aarch64/aarch64-cores.def

@@ -21,18 +21,18 @@
 
    Before using #include to read this file, define a macro:
 
-      AARCH64_CORE(CORE_NAME, CORE_IDENT, ARCH, FLAGS, COSTS)
+      AARCH64_CORE(CORE_NAME, CORE_IDENT, SCHEDULER_IDENT, ARCH, FLAGS, COSTS)
 
    The CORE_NAME is the name of the core, represented as a string constant.
    The CORE_IDENT is the name of the core, represented as an identifier.
+   The SCHEDULER_IDENT is the name of the core for which scheduling decisions
+   will be made, represented as an identifier.
    ARCH is the architecture revision implemented by the chip.
    FLAGS are the bitwise-or of the traits that apply to that core.
    This need not include flags implied by the architecture.
    COSTS is the name of the rtx_costs routine to use.  */
 
-/* V8 Architecture Processors.
-   This list currently contains example CPUs that implement AArch64, and
-   therefore serves as a template for adding more CPUs in the future.  */
+/* V8 Architecture Processors.  */
 
-AARCH64_CORE("cortex-a53",	  cortexa53,	     8,  AARCH64_FL_FPSIMD,    cortexa53)
-AARCH64_CORE("cortex-a57",	  cortexa15,	     8,  AARCH64_FL_FPSIMD,    generic)
+AARCH64_CORE("cortex-a53",  cortexa53, cortexa53, 8,  AARCH64_FL_FPSIMD, cortexa53)
+AARCH64_CORE("cortex-a57",  cortexa15, cortexa15, 8,  AARCH64_FL_FPSIMD, generic)

gcc/config/aarch64/aarch64-opts.h

@@ -25,8 +25,8 @@
 /* The various cores that implement AArch64.  */
 enum aarch64_processor
 {
-#define AARCH64_CORE(NAME, IDENT, ARCH, FLAGS, COSTS) \
-  IDENT,
+#define AARCH64_CORE(NAME, INTERNAL_IDENT, IDENT, ARCH, FLAGS, COSTS) \
+  INTERNAL_IDENT,
 #include "aarch64-cores.def"
 #undef AARCH64_CORE
   /* Used to indicate that no processor has been specified.  */

gcc/config/aarch64/aarch64.c

@@ -246,7 +246,7 @@ struct processor
 /* Processor cores implementing AArch64.  */
 static const struct processor all_cores[] =
 {
-#define AARCH64_CORE(NAME, IDENT, ARCH, FLAGS, COSTS) \
+#define AARCH64_CORE(NAME, X, IDENT, ARCH, FLAGS, COSTS) \
   {NAME, IDENT, #ARCH, FLAGS | AARCH64_FL_FOR_ARCH##ARCH, &COSTS##_tunings},
 #include "aarch64-cores.def"
 #undef AARCH64_CORE
@@ -5119,6 +5119,7 @@ aarch64_parse_cpu (void)
       if (strlen (cpu->name) == len && strncmp (cpu->name, str, len) == 0)
 	{
 	  selected_cpu = cpu;
+	  selected_tune = cpu;
 	  aarch64_isa_flags = selected_cpu->flags;
 
 	  if (ext != NULL)

gcc/config/aarch64/aarch64.h

@@ -461,8 +461,8 @@ enum reg_class
 
 enum target_cpus
 {
-#define AARCH64_CORE(NAME, IDENT, ARCH, FLAGS, COSTS) \
-  TARGET_CPU_##IDENT,
+#define AARCH64_CORE(NAME, INTERNAL_IDENT, IDENT, ARCH, FLAGS, COSTS) \
+  TARGET_CPU_##INTERNAL_IDENT,
 #include "aarch64-cores.def"
 #undef AARCH64_CORE
   TARGET_CPU_generic