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[GCC, ARM] Backport trunk fix to 4.8 branch to properly handle rtx of ARM PLD instruction

From: "Terry Guo" <terry dot guo at arm dot com>
To: <gcc-patches at gcc dot gnu dot org>
Cc: "Richard Earnshaw" <Richard dot Earnshaw at arm dot com>
Date: Wed, 15 Jan 2014 17:23:22 +0800
Subject: [GCC, ARM] Backport trunk fix to 4.8 branch to properly handle rtx of ARM PLD instruction
Authentication-results: sourceware.org; auth=none

Hi there,

With trunk enhancement at
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg00533.html, gcc can properly
handle PLD rtx. Otherwise the PLD rtx will be treated as SET rtx and gcc
will end up with ICE. The attached patch intends to back port this
enhancement to 4.8 branch. Tested with gcc regression test, no new
regressions. Is it ok to back port?

BR,
Terry

2014-01-15  Terry Guo  <terry.guo@arm.com>

	Backported from mainline r204575 and applied to file arm.c.
	2013-11-08  James Greenhalgh  <james.greenhalgh@arm.com>

	* config/arm/aarch-common.c
	(search_term): New typedef.
	(shift_rtx_costs): New array.
	(arm_rtx_shift_left_p): New.
	(arm_find_sub_rtx_with_search_term): Likewise.
	(arm_find_sub_rtx_with_code): Likewise.
	(arm_early_load_addr_dep): Add sanity checking.
	(arm_no_early_alu_shift_dep): Likewise.
	(arm_no_early_alu_shift_value_dep): Likewise.
	(arm_no_early_mul_dep): Likewise.
	(arm_no_early_store_addr_dep): Likewise.

Attachment: backport-204575.txt
Description: Text document

Follow-Ups:
- Re: [GCC, ARM] Backport trunk fix to 4.8 branch to properly handle rtx of ARM PLD instruction
  - From: Richard Earnshaw

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