r216077 - in /branches/gcc-4_9-branch/gcc: Chan...

[ktkachov@gcc.gnu.org]

Author: ktkachov
Date: Fri Oct 10 12:42:41 2014
New Revision: 216077

URL: https://gcc.gnu.org/viewcvs?rev=216077&root=gcc&view=rev
Log:
[AArch64] Implement workaround for ARM Cortex-A53 erratum 835769

	Backport from mainline
	2014-10-10  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
	            Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	* config/aarch64/aarch64.h (FINAL_PRESCAN_INSN): Define.
	(ADJUST_INSN_LENGTH): Define.
	* config/aarch64/aarch64.opt (mfix-cortex-a53-835769): New option.
	* config/aarch64/aarch64.c (is_mem_p): New function.
	(is_memory_op): Likewise.
	(aarch64_prev_real_insn): Likewise.
	(is_madd_op): Likewise.
	(dep_between_memop_and_curr): Likewise.
	(aarch64_madd_needs_nop): Likewise.
	(aarch64_final_prescan_insn): Likewise.
	* doc/invoke.texi (AArch64 Options): Document -mfix-cortex-a53-835769
	and -mno-fix-cortex-a53-835769 options.

Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/config/aarch64/aarch64-protos.h
    branches/gcc-4_9-branch/gcc/config/aarch64/aarch64.c
    branches/gcc-4_9-branch/gcc/config/aarch64/aarch64.h
    branches/gcc-4_9-branch/gcc/config/aarch64/aarch64.opt
    branches/gcc-4_9-branch/gcc/doc/invoke.texi