[ARM 3/5 big.LITTLE] Add support for -mcpu=cortex-a15.cortex-a7

[James Greenhalgh]

Hi,

This patch wires up -mcpu=cortex-a15.cortex-a7 as an option to
-mcpu.

Bootstrapped in series, with --with-cpu=cortex-a15.cortex-a7.

OK?

Thanks,
James

---
2013-12-17  James Greenhalgh  <james.greenha...@arm.com>

        * config/arm/arm-cores.def (cortex-a15.cortex-a7): New.
        * doc/invoke.texi: Document -mcpu=cortex-a15.cortex-a7.
        * config/arm/arm-tables.opt: Regenerate.
        * config/arm/arm-tune.md: Regenerate.
        * config/arm/bpabi.h
        (BE8_LINK_SPEC): Handle -mcpu=cortex-a5.cortex-a7.

diff --git a/gcc/config/arm/arm-cores.def b/gcc/config/arm/arm-cores.def
index 3264eed..0ea5eef 100644
--- a/gcc/config/arm/arm-cores.def
+++ b/gcc/config/arm/arm-cores.def
@@ -148,5 +148,8 @@ ARM_CORE("cortex-m4",		cortexm4, cortexm4,		7EM, FL_LDSCHED, v7m)
 ARM_CORE("cortex-m3",		cortexm3, cortexm3,		7M,  FL_LDSCHED, v7m)
 ARM_CORE("marvell-pj4",		marvell_pj4, marvell_pj4,	7A,  FL_LDSCHED, 9e)
 
+/* V7 big.LITTLE implementations */
+ARM_CORE("cortex-a15.cortex-a7", cortexa15cortexa7, cortexa7,	7A,  FL_LDSCHED | FL_THUMB_DIV | FL_ARM_DIV, cortex_a15)
+
 /* V8 Architecture Processors */
 ARM_CORE("cortex-a53",	cortexa53, cortexa53,	8A, FL_LDSCHED, cortex_a53)
diff --git a/gcc/config/arm/arm-tables.opt b/gcc/config/arm/arm-tables.opt
index 7da7cc8..d847c10 100644
--- a/gcc/config/arm/arm-tables.opt
+++ b/gcc/config/arm/arm-tables.opt
@@ -283,6 +283,9 @@ EnumValue
 Enum(processor_type) String(marvell-pj4) Value(marvell_pj4)
 
 EnumValue
+Enum(processor_type) String(cortex-a15.cortex-a7) Value(cortexa15cortexa7)
+
+EnumValue
 Enum(processor_type) String(cortex-a53) Value(cortexa53)
 
 Enum
diff --git a/gcc/config/arm/arm-tune.md b/gcc/config/arm/arm-tune.md
index 0386afff7428169ad0e31ae4de4bd677413bc817..beee9af013f6a5a75b7051f3c7077e98fafd45ef 100644
--- a/gcc/config/arm/arm-tune.md
+++ b/gcc/config/arm/arm-tune.md
@@ -29,5 +29,6 @@ (define_attr "tune"
 	cortexa8,cortexa9,cortexa12,
 	cortexa15,cortexr4,cortexr4f,
 	cortexr5,cortexr7,cortexm4,
-	cortexm3,marvell_pj4,cortexa53"
+	cortexm3,marvell_pj4,cortexa15cortexa7,
+	cortexa53"
 	(const (symbol_ref "((enum attr_tune) arm_tune)")))
diff --git a/gcc/config/arm/bpabi.h b/gcc/config/arm/bpabi.h
index b39c4a9..669884d 100644
--- a/gcc/config/arm/bpabi.h
+++ b/gcc/config/arm/bpabi.h
@@ -60,6 +60,7 @@
    |mcpu=cortex-a7                                      \
    |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15       \
    |mcpu=cortex-a12					\
+   |mcpu=cortex-a15.cortex-a7				\
    |mcpu=marvell-pj4					\
    |mcpu=cortex-a53					\
    |mcpu=generic-armv7-a                                \
@@ -74,6 +75,7 @@
    |mcpu=cortex-a7                                      \
    |mcpu=cortex-a8|mcpu=cortex-a9|mcpu=cortex-a15       \
    |mcpu=cortex-a12					\
+   |mcpu=cortex-a15.cortex-a7				\
    |mcpu=cortex-a53					\
    |mcpu=marvell-pj4					\
    |mcpu=generic-armv7-a                                \
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b655a64..e069305 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -12168,6 +12168,9 @@ assembly code.  Permissible names are: @samp{arm2}, @samp{arm250},
 @samp{fa526}, @samp{fa626},
 @samp{fa606te}, @samp{fa626te}, @samp{fmp626}, @samp{fa726te}.
 
+Additionally, this option can specify that GCC should tune the performance
+of the code for a big.LITTLE system.  The only permissible name is:
+@samp{cortex-a15.cortex-a7}.
 
 @option{-mcpu=generic-@var{arch}} is also permissible, and is
 equivalent to @option{-march=@var{arch} -mtune=generic-@var{arch}}.