On 23 June 2015 at 09:49, James Greenhalgh <james.greenha...@arm.com> wrote: > > Hi, > > This final patch adds support for the new command line option > "-moverride". The purpose of this command line is to allow expert-level users > of the compiler, and those comfortable with experimenting with the compiler, > *unsupported* full access to the tuning structures used in the AArch64 > back-end. > > For now, we only enable command-line access to the fusion pairs to > enable and whether or not to use the Cortex-A57 FMA register renaming > pass. Though in future we can expand this further. > > With this patch, you might write something like: > > -moverride=fuse=adrp+add.cmp+branch:tune=rename_fma_regs > > To enable fusion of adrp+add and cmp+branch and to enable the > fma-rename pass. > > I've bootstrapped and tested the patch set on aarch64-none-linux-gnu > with BOOT_CFLAGS set to the example string above, and again in the > standard configuration with no issues. > > OK? > > Thanks, > James > > --- > 2015-06-23 James Greenhalgh <james.greenha...@arm.com> > > * config/aarch64/aarch64.opt: (override): New. > * doc/invoke.texi (override): Document. > * config/aarch64/aarch64.c (aarch64_flag_desc): New > (aarch64_fusible_pairs): Likewise. > (aarch64_tuning_flags): Likewise. > (aarch64_tuning_override_function): Likewise. > (aarch64_tuning_override_functions): Likewise. > (aarch64_parse_one_option_token): Likewise. > (aarch64_parse_boolean_options): Likewise. > (aarch64_parse_fuse_string): Likewise. > (aarch64_parse_tune_string): Likewise. > (aarch64_parse_one_override_token): Likewise. > (aarch64_parse_override_string): Likewise. > (aarch64_override_options): Parse the -override string if it > is present. >
+static const struct aarch64_tuning_override_function + aarch64_tuning_override_functions[] = The indentation looks odd here, but otherwise OK /Marcus
