[arm] Add support for Arm Ares

This adds support for the Arm Ares CPU for in the arm port.
It implements the Armv8.2-A architecture with the optional features
of statistical profiling, dot product and FP16 on by default.

Note: Ares is a codename to enable early adopters and in time
we will add the final product name once it's announced. 

	* config/arm/arm-cpus.in (ares): New entry.
	* config/arm/arm-tables.opt: Regenerate.
	* config/arm/arm-tune.md: Likewise.
	* doc/invoke.texi (ARM Options): Document ares.

From-SVN: r265881

gcc/ChangeLog

 2018-11-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
 
+	* config/arm/arm-cpus.in (ares): New entry.
+	* config/arm/arm-tables.opt: Regenerate.
+	* config/arm/arm-tune.md: Likewise.
+	* doc/invoke.texi (ARM Options): Document ares.
+
+2018-11-07  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
 	* config/aarch64/aarch64-cores.def (ares): Define.
 	* config/aarch64/aarch64-tune.md: Regenerate.
 	* doc/invoke.texi (AArch64 Options): Document ares value for mtune.

gcc/config/arm/arm-cpus.in

@@ -1376,6 +1376,17 @@ begin cpu cortex-a76
  part d0b
 end cpu cortex-a76
 
+begin cpu ares
+ cname ares
+ tune for cortex-a57
+ tune flags LDSCHED
+ architecture armv8.2-a+fp16+dotprod+simd
+ option crypto add FP_ARMv8 CRYPTO
+ costs cortex_a57
+ vendor 41
+ part d0c
+end cpu ares
+
 # ARMv8.2 A-profile ARM DynamIQ big.LITTLE implementations
 begin cpu cortex-a75.cortex-a55
  cname cortexa75cortexa55

gcc/config/arm/arm-tables.opt

@@ -283,6 +283,9 @@ EnumValue
 Enum(processor_type) String(cortex-a76) Value( TARGET_CPU_cortexa76)
 
 EnumValue
+Enum(processor_type) String(ares) Value( TARGET_CPU_ares)
+
+EnumValue
 Enum(processor_type) String(cortex-a75.cortex-a55) Value( TARGET_CPU_cortexa75cortexa55)
 
 EnumValue

gcc/config/arm/arm-tune.md

@@ -49,7 +49,7 @@
 	cortexa72,cortexa73,exynosm1,
 	xgene1,cortexa57cortexa53,cortexa72cortexa53,
 	cortexa73cortexa35,cortexa73cortexa53,cortexa55,
-	cortexa75,cortexa76,cortexa75cortexa55,
-	cortexa76cortexa55,cortexm23,cortexm33,
-	cortexr52"
+	cortexa75,cortexa76,ares,
+	cortexa75cortexa55,cortexa76cortexa55,cortexm23,
+	cortexm33,cortexr52"
 	(const (symbol_ref "((enum attr_tune) arm_tune)")))

gcc/doc/invoke.texi

@@ -16708,8 +16708,8 @@ Permissible names are: @samp{arm2}, @samp{arm250},
 @samp{cortex-a9}, @samp{cortex-a12}, @samp{cortex-a15}, @samp{cortex-a17},
 @samp{cortex-a32}, @samp{cortex-a35}, @samp{cortex-a53}, @samp{cortex-a55},
 @samp{cortex-a57}, @samp{cortex-a72}, @samp{cortex-a73}, @samp{cortex-a75},
-@samp{cortex-a76}, @samp{cortex-r4}, @samp{cortex-r4f}, @samp{cortex-r5},
-@samp{cortex-r7}, @samp{cortex-r8}, @samp{cortex-r52},
+@samp{cortex-a76}, @samp{ares}, @samp{cortex-r4}, @samp{cortex-r4f},
+@samp{cortex-r5}, @samp{cortex-r7}, @samp{cortex-r8}, @samp{cortex-r52},
 @samp{cortex-m33},
 @samp{cortex-m23},
 @samp{cortex-m7},