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[PING][PATCH][AARCH64]Add ACLE 2.0 predefined macros: __ARM_ALIGN_MAX_PWR and __ARM_ALIGN_MAX_STACK_PWR

From: Renlin Li <renlin dot li at arm dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Cc: Marcus Shawcroft <Marcus dot Shawcroft at arm dot com>, Ramana Radhakrishnan <Ramana dot Radhakrishnan at arm dot com>
Date: Tue, 28 Apr 2015 16:51:08 +0100
Subject: [PING][PATCH][AARCH64]Add ACLE 2.0 predefined macros: __ARM_ALIGN_MAX_PWR and __ARM_ALIGN_MAX_STACK_PWR
Authentication-results: sourceware.org; auth=none
References: <54900732 dot 4010604 at arm dot com>

Ping~

Regards,
Renlin Li

On 16/12/14 10:19, Renlin Li wrote:

Hi all,

This is a simple patch to add another two ACLE 2.0 predefined macros
into aarch64 backend.
They are __ARM_ALIGN_MAX_PWR and __ARM_ALIGN_MAX_STACK_PWR. Currently,
those two values are hard-wired to 16.

The following clauses from ACLE 2.0 documentation indicate the meaning
of those two macros:

The macro __ARM_ALIGN_MAX_STACK_PWR indicates (as the exponent of a
power of 2) the maximum available stack alignment.
The macro __ARM_ALIGN_MAX_PWR indicates (as the exponent of a power of
2) the maximum available alignment of static data.

aarch64-none-elf target is tested on on the model. No new regression.

Is it Okay for trunk?

Regards,
Renlin Li

gcc/ChangeLog

2014-12-16  Renlin Li  <renlin.li@arm.com>

          * config/aarch64/aarch64.h(TARGET_CPU_CPP_BUILTINS): Define
__ARM_ALIGN_MAX_PWR
          and __ARM_ALIGN_MAX_STACK_PWR.

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