On Wed, 2011-06-01 at 16:24 +0100, Julian Brown wrote: > This patch allows the BRANCH_COST macro to be altered for a given > target using the ARM backend's tuning infrastructure. It's not easy > to reduce the cost to e.g. a single integer or a set of integers (cores > may have different branch costing characteristics for ARM vs. Thumb-2 > mode for instance, as in the existing BRANCH_COST definition), so I've > used a function pointer in the tuning structure for maximum flexibility. > > This patch just uses the same hook for all existing cores (i.e. it > should result in unchanged behaviour). Later patches can then override > the default in specific cases. > > Testing is still in progress. OK to apply, pending success with that? > > Thanks, > > Julian > > ChangeLog > > gcc/ > * config/arm/arm-protos.h (tune_params): Add branch_cost hook. > * config/arm/arm.c (arm_default_branch_cost): New. > (arm_slowmul_tune, arm_fastmul_tune, arm_xscale_tune, arm_9e_tune) > (arm_v6t2_tune, arm_cortex_tune, arm_cortex_a9_tune) > (arm_fa726_tune): Set branch_cost field using > arm_default_branch_cost. > * config/arm/arm.h (BRANCH_COST): Use branch_cost hook from > current_tune structure. > * dojump.c (tm_p.h): Include file.
OK. R.
