Code scheduling for Cortex-A53 isn't as good as it could be.

Code scheduling for Cortex-A53 isn't as good as it could be.

Code scheduling for Cortex-A53 isn't as good as it could be.  It turns out
code runs faster overall if we place loads and stores with a dependency
closer together.  To achieve this effect, this patch adds a bypass between
cortex_a53_load1 and cortex_a53_load*/cortex_a53_store* if the result of an
earlier load is used in an address calculation.  This significantly improved
benchmark scores in a proprietary benchmark suite.

    gcc/
	* config/arm/aarch-common.c (arm_early_load_addr_dep_ptr):
	New function.
	(arm_early_store_addr_dep_ptr): Likewise.
	* config/arm/aarch-common-protos.h
	(arm_early_load_addr_dep_ptr): Add prototype.
	(arm_early_store_addr_dep_ptr): Likewise.
	* config/arm/cortex-a53.md: Add new bypasses.

From-SVN: r247631