[PATCH 1/12] arm: Make mbranch-protection opts parsing common to AArch32/64

Richard Earnshaw Richard.Earnshaw@foss.arm.com
Fri Jul 1 10:49:50 GMT 2022

On 28/04/2022 10:08, Andrea Corallo via Gcc-patches wrote:
> Hi all,
> This change refactors all the mbranch-protection option parsing code and
> types to make it common to both AArch32 and AArch64 backends.
> This change also pulls in some supporting types from AArch64 to make
> it common (aarch_parse_opt_result).
> The significant changes in this patch are the movement of all branch
> protection parsing routines from aarch64.c to aarch-common.c and
> supporting data types and static data structures.
> This patch also pre-declares variables and types required in the
> aarch32 back-end for moved variables for function sign scope and key
> to prepare for the impending series of patches that support parsing
> the feature mbranch-protection in the aarch32 back-end.
> This patch implements the changes requested and was pre-approved here
> <https://gcc.gnu.org/pipermail/gcc-patches/2021-December/586139.html>.
> gcc/ChangeLog:
> 	* common/config/aarch64/aarch64-common.cc: Include aarch-common.h.
> 	(all_architectures): Fix comment.
> 	(aarch64_parse_extension): Rename return type, enum value names.
> 	* config/aarch64/aarch64-c.cc (aarch64_update_cpp_builtins): Rename
> 	factored out aarch_ra_sign_scope and aarch_ra_sign_key variables.
> 	Also rename corresponding enum values.
> 	* config/aarch64/aarch64-opts.h (aarch64_function_type): Factor
> 	out aarch64_function_type and move it to common code as
> 	aarch_function_type in aarch-common.h.
> 	* config/aarch64/aarch64-protos.h: Include common types header,
> 	move out types aarch64_parse_opt_result and aarch64_key_type to
> 	aarch-common.h
> 	* config/aarch64/aarch64.cc: Move mbranch-protection parsing types
> 	and functions out into aarch-common.h and aarch-common.cc.  Fix up
> 	all the name changes resulting from the move.
> 	* config/aarch64/aarch64.md: Fix up aarch64_ra_sign_key type name change
> 	and enum value.
> 	* config/aarch64/aarch64.opt: Include aarch-common.h to import
> 	type move.  Fix up name changes from factoring out common code and
> 	data.
> 	* config/arm/aarch-common-protos.h: Export factored out routines to both
> 	backends.
> 	* config/arm/aarch-common.cc: Include newly factored out types.  Move all
> 	mbranch-protection code and data structures from aarch64.cc.
> 	* config/arm/aarch-common.h: New header that declares types shared
> 	between aarch32 and aarch64 backends.
> 	* config/arm/arm-protos.h: Declare types and variables that are
> 	made common to aarch64 and aarch32 backends - aarch_ra_sign_key,
> 	aarch_ra_sign_scope and aarch_enable_bti.
> Co-Authored-By: Tejas Belagod  <tbelagod@arm.com>

OK, but please wait for the rest of this series to be approved before 


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