[AArch64 3/3 big.LITTLE] Add support for -mcpu=cortex-a57.cortex-a53

gcc/

	* config/aarch64/aarch64-cores.def: Add support for
	-mcpu=cortex-a57.cortex-a53.
	* config/aarch64/aarch64-tune.md: Regenerate.
	* doc/invoke.texi: Document -mcpu=cortex-a57.cortex-a53.

From-SVN: r206100

gcc/ChangeLog

 2013-12-18  James Greenhalgh  <james.greenhalgh@arm.com>
 
+	* config/aarch64/aarch64-cores.def: Add support for
+	-mcpu=cortex-a57.cortex-a53.
+	* config/aarch64/aarch64-tune.md: Regenerate.
+	* doc/invoke.texi: Document -mcpu=cortex-a57.cortex-a53.
+
+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

gcc/config/aarch64/aarch64-cores.def

@@ -36,3 +36,7 @@
 
 AARCH64_CORE("cortex-a53",  cortexa53, cortexa53, 8,  AARCH64_FL_FPSIMD, cortexa53)
 AARCH64_CORE("cortex-a57",  cortexa15, cortexa15, 8,  AARCH64_FL_FPSIMD, generic)
+
+/* V8 big.LITTLE implementations.  */
+
+AARCH64_CORE("cortex-a57.cortex-a53",  cortexa57cortexa53, cortexa53, 8,  AARCH64_FL_FPSIMD, generic)

gcc/config/aarch64/aarch64-tune.md

 ;; -*- buffer-read-only: t -*-
 ;; Generated automatically by gentune.sh from aarch64-cores.def
 (define_attr "tune"
-	"cortexa53,cortexa15"
+	"cortexa53,cortexa15,cortexa57cortexa53"
 	(const (symbol_ref "((enum attr_tune) aarch64_tune)")))

gcc/doc/invoke.texi

@@ -11334,6 +11334,9 @@ possible values for @var{cpu} are @samp{generic}, @samp{cortex-a53},
 @samp{cortex-a57}.  The possible values for @var{feature} are documented
 in the sub-section below.
 
+Additionally, this option can specify that the target is a big.LITTLE system.
+The only possible value is @samp{cortex-a57.cortex-a53}.
+
 Where conflicting feature modifiers are specified, the right-most feature is
 used.