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[PATCH][AArch64] Add support for -mcpu=cortex-a72


Hello,

The Cortex-A72 is an ARMv8 core with the same architectural features as the Cortex-A57. This patch adds support for the command line option -mcpu=cortex-a72 with the same effect as the -mcpu=cortex-a57 option, only the name being different. It also adds support for the -mcpu=cortex-a72.cortex-a53 big-little variant.

Tested with check-gcc on aarch64-none-linux-gnu with no new failures. Tested the new cpu options from the command line.

Matthew

gcc/
2015-02-04  Matthew Wahab  <matthew.wahab@arm.com>

	* config/aarch64/aarch64-cores.def: Add cortex-a72 and
	cortex-a72.cortex-a53.
	* config/aarch64/aarch64-tune.md: Regenerate.
	* doc/invoke.texi (AArch64 Options/-mtune): Add "cortex-a72".
diff --git a/gcc/config/aarch64/aarch64-cores.def b/gcc/config/aarch64/aarch64-cores.def
index f978eb1..9b2eca2 100644
--- a/gcc/config/aarch64/aarch64-cores.def
+++ b/gcc/config/aarch64/aarch64-cores.def
@@ -36,9 +36,11 @@
 
 AARCH64_CORE("cortex-a53",  cortexa53, cortexa53, 8,  AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa53)
 AARCH64_CORE("cortex-a57",  cortexa57, cortexa57, 8,  AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa57)
+AARCH64_CORE("cortex-a72",  cortexa72, cortexa57, 8,  AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa57)
 AARCH64_CORE("thunderx",    thunderx,  thunderx, 8,  AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC | AARCH64_FL_CRYPTO, thunderx)
 AARCH64_CORE("xgene1",      xgene1,    xgene1,    8,  AARCH64_FL_FOR_ARCH8, xgene1)
 
 /* V8 big.LITTLE implementations.  */
 
 AARCH64_CORE("cortex-a57.cortex-a53",  cortexa57cortexa53, cortexa53, 8,  AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa57)
+AARCH64_CORE("cortex-a72.cortex-a53",  cortexa72cortexa53, cortexa53, 8,  AARCH64_FL_FOR_ARCH8 | AARCH64_FL_CRC, cortexa57)
diff --git a/gcc/config/aarch64/aarch64-tune.md b/gcc/config/aarch64/aarch64-tune.md
index 80f59c8..c3305f9 100644
--- a/gcc/config/aarch64/aarch64-tune.md
+++ b/gcc/config/aarch64/aarch64-tune.md
@@ -1,5 +1,5 @@
 ;; -*- buffer-read-only: t -*-
 ;; Generated automatically by gentune.sh from aarch64-cores.def
 (define_attr "tune"
-	"cortexa53,cortexa57,thunderx,xgene1,cortexa57cortexa53"
+	"cortexa53,cortexa57,cortexa72,thunderx,xgene1,cortexa57cortexa53,cortexa72cortexa53"
 	(const (symbol_ref "((enum attr_tune) aarch64_tune)")))
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 2d3c4f7..2d73006 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -12102,12 +12102,12 @@ architecture.
 @opindex mtune
 Specify the name of the target processor for which GCC should tune the
 performance of the code.  Permissible values for this option are:
-@samp{generic}, @samp{cortex-a53}, @samp{cortex-a57}, @samp{thunderx},
-@samp{xgene1}.
+@samp{generic}, @samp{cortex-a53}, @samp{cortex-a57},
+@samp{cortex-a72}, @samp{thunderx}, @samp{xgene1}.
 
 Additionally, this option can specify that GCC should tune the performance
-of the code for a big.LITTLE system.  The only permissible value is
-@samp{cortex-a57.cortex-a53}.
+of the code for a big.LITTLE system.  Permissible values for this
+option are: @samp{cortex-a57.cortex-a53}, @samp{cortex-a72.cortex-a53}.
 
 Where none of @option{-mtune=}, @option{-mcpu=} or @option{-march=}
 are specified, the code is tuned to perform well across a range

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