On Fri, May 09, 2014 at 05:14:45PM -0400, David Malcolm wrote:
> GCC's code is full of references to options like:
>
> static bool
> gate_vrp (void)
> {
> return flag_tree_vrp != 0;
> }
>
> where "flag_tree_vrp" is actually an autogenerated macro to:
>
> global_options.x_flag_tree_vrp
>
> This is deeply confusing to a newbie (and indeed still to me after ~two
> years of working with GCC's internals) e.g. when stepping through code and
> trying to query the value in gdb - what is an actual variable, and what is
> an option? Why isn't tab-completion working? etc
>
> The idea of the following patch series is to replace the above with:
>
> static bool
> gate_vrp (void)
> {
> return GCC_OPTION (flag_tree_vrp) != 0;
> }Well, these functions take a function * now as of my refactor a week or two ago. > thus making it obvious when macro magic is occurring. what exactly does the x_ and macro thing buy us anyway, imo opts.vrp_enabled or opts.vrp_enabled () seems fine. > There are two patches, a hand-written one, and an autogenerated one. > > The latter is 2.2MB in size, so I've uploaded it to: > > http://dmalcolm.fedorapeople.org/gcc/large-patches/6fb783b39f914574a1889aa51d06c08cf55678b4-0002-Autogenerated-part-of-introduction-of-GCC_OPTION-mac.patch > > The autogenerated patch was generated by a script: > > https://github.com/davidmalcolm/gcc-refactoring-scripts/blob/master/refactor_options.py > which has a selftest suite here: > > https://github.com/davidmalcolm/gcc-refactoring-scripts/blob/master/test_refactor_options.py > > From a global-state-removal perspective, it might be nice to associate > options with a gcc::context, rather than have a single instance of options, > though that isn't addressed in these patches. I thought we wanted to hang options off the function to make handling lto / optimization pragmas / attributes easier? If we want to do that, or for that matter the context thing, I'd think the natural ordering would be to pass the argument to the get_opt macro / function, and then just change its implementation to not look at the global. That would have the advantage of less churn ;) Trev > (e.g. perhaps explicitly adding a gcc::context arg to the macro???) > > The patches were successfully bootstrapped®rtested on top > of r208714 (rather old, 2014-03-20) albeit just on x86_64-unknown-linux-gnu > (Fedora 20), with > --enable-languages=c,c++,objc,obj-c++,java,fortran,ada,go,lto > (i.e. every frontend, I think). > > OK for trunk, after 4.9.1 is released? (clearly I need to test on > more targets first, given how much config/* code this touches, but I > wanted to sound the idea out on this list). > > Dave > > David Malcolm (2): > Handwritten part of introduction of GCC_OPTION macro > Autogenerated part of introduction of GCC_OPTION macro > > gcc/ada/gcc-interface/decl.c | 17 +- > gcc/ada/gcc-interface/gigi.h | 6 +- > gcc/ada/gcc-interface/misc.c | 31 +- > gcc/ada/gcc-interface/trans.c | 32 +- > gcc/ada/gcc-interface/utils.c | 6 +- > gcc/ada/gcc-interface/utils2.c | 2 +- > gcc/alias.c | 14 +- > gcc/asan.c | 14 +- > gcc/auto-inc-dec.c | 2 +- > gcc/bb-reorder.c | 14 +- > gcc/bt-load.c | 20 +- > gcc/builtins.c | 112 ++-- > gcc/builtins.def | 16 +- > gcc/c-family/c-ada-spec.c | 8 +- > gcc/c-family/c-common.c | 90 +-- > gcc/c-family/c-cppbuiltin.c | 54 +- > gcc/c-family/c-format.c | 30 +- > gcc/c-family/c-gimplify.c | 4 +- > gcc/c-family/c-lex.c | 18 +- > gcc/c-family/c-opts.c | 158 ++--- > gcc/c-family/c-pch.c | 10 +- > gcc/c-family/c-pragma.c | 32 +- > gcc/c-family/c.opt | 14 +- > gcc/c-family/cilk.c | 2 +- > gcc/c/c-aux-info.c | 2 +- > gcc/c/c-decl.c | 146 ++--- > gcc/c/c-parser.c | 142 ++--- > gcc/c/c-typeck.c | 156 ++--- > gcc/caller-save.c | 4 +- > gcc/calls.c | 22 +- > gcc/cfgbuild.c | 2 +- > gcc/cfgcleanup.c | 10 +- > gcc/cfgexpand.c | 38 +- > gcc/cfgloopanal.c | 4 +- > gcc/cfgrtl.c | 16 +- > gcc/cgraph.c | 12 +- > gcc/cgraphclones.c | 6 +- > gcc/cgraphunit.c | 66 +- > gcc/cilk.h | 2 +- > gcc/combine-stack-adj.c | 2 +- > gcc/combine.c | 22 +- > gcc/common/config/arc/arc-common.c | 2 +- > gcc/compare-elim.c | 2 +- > gcc/config/aarch64/aarch64.c | 48 +- > gcc/config/aarch64/aarch64.h | 6 +- > gcc/config/aarch64/aarch64.md | 2 +- > gcc/config/alpha/alpha.c | 154 ++--- > gcc/config/alpha/alpha.h | 2 +- > gcc/config/alpha/alpha.md | 8 +- > gcc/config/alpha/elf.h | 4 +- > gcc/config/alpha/linux.h | 6 +- > gcc/config/alpha/predicates.md | 4 +- > gcc/config/alpha/vms.h | 16 +- > gcc/config/arc/arc.c | 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+- > gcc/java/typeck.c | 2 +- > gcc/java/verify-glue.c | 2 +- > gcc/langhooks.c | 2 +- > gcc/loop-init.c | 26 +- > gcc/loop-invariant.c | 32 +- > gcc/loop-iv.c | 8 +- > gcc/loop-unroll.c | 24 +- > gcc/lower-subreg.c | 2 +- > gcc/lra-constraints.c | 2 +- > gcc/lra-spills.c | 2 +- > gcc/lra.c | 2 +- > gcc/lto-cgraph.c | 12 +- > gcc/lto-compress.c | 2 +- > gcc/lto-section-in.c | 4 +- > gcc/lto-section-out.c | 2 +- > gcc/lto-streamer-in.c | 4 +- > gcc/lto-streamer-out.c | 18 +- > gcc/lto-streamer.c | 6 +- > gcc/lto/lto-lang.c | 32 +- > gcc/lto/lto-partition.c | 14 +- > gcc/lto/lto-symtab.c | 4 +- > gcc/lto/lto.c | 88 +-- > gcc/mode-switching.c | 2 +- > gcc/modulo-sched.c | 14 +- > gcc/objc/objc-act.c | 82 +-- > gcc/objc/objc-encoding.c | 16 +- > gcc/objc/objc-gnu-runtime-abi-01.c | 20 +- > gcc/objc/objc-next-runtime-abi-01.c | 40 +- > gcc/objc/objc-next-runtime-abi-02.c | 14 +- > gcc/objc/objc-runtime-shared-support.c | 4 +- > gcc/omp-low.c | 42 +- > gcc/optabs.c | 12 +- > gcc/opth-gen.awk | 15 +- > gcc/opts-global.c | 8 +- > gcc/opts.c | 6 +- > gcc/passes.c | 46 +- > gcc/plugin.c | 4 +- > gcc/postreload-gcse.c | 6 +- > gcc/postreload.c | 4 +- > gcc/predict.c | 24 +- > gcc/print-rtl.c | 10 +- > gcc/print-tree.c | 2 +- > gcc/profile.c | 14 +- > gcc/real.h | 10 +- > gcc/recog.c | 16 +- > gcc/ree.c | 2 +- > gcc/reg-stack.c | 6 +- > gcc/regcprop.c | 2 +- > gcc/regrename.c | 2 +- > gcc/regs.h | 4 +- > gcc/reload.c | 10 +- > gcc/reload1.c | 24 +- > gcc/reorg.c | 4 +- > gcc/rtl.h | 2 +- > gcc/rtlanal.c | 10 +- > gcc/sched-ebb.c | 4 +- > gcc/sched-rgn.c | 36 +- > gcc/sdbout.c | 2 +- > gcc/sel-sched-ir.c | 16 +- > gcc/sel-sched-ir.h | 4 +- > gcc/sel-sched.c | 4 +- > gcc/simplify-rtx.c | 28 +- > gcc/stmt.c | 8 +- > gcc/stor-layout.c | 20 +- > gcc/store-motion.c | 2 +- > gcc/symtab.c | 4 +- > gcc/targhooks.c | 30 +- > gcc/toplev.c | 378 +++++------ > gcc/tracer.c | 6 +- > gcc/trans-mem.c | 10 +- > gcc/tree-call-cdce.c | 2 +- > gcc/tree-cfg.c | 10 +- > gcc/tree-cfgcleanup.c | 28 +- > gcc/tree-complex.c | 6 +- > gcc/tree-data-ref.c | 2 +- > gcc/tree-eh.c | 38 +- > gcc/tree-if-conv.c | 34 +- > gcc/tree-inline.c | 22 +- > gcc/tree-loop-distribution.c | 10 +- > gcc/tree-nested.c | 10 +- > gcc/tree-nrv.c | 2 +- > gcc/tree-outof-ssa.c | 4 +- > gcc/tree-parloops.c | 10 +- > gcc/tree-predcom.c | 4 +- > gcc/tree-profile.c | 24 +- > gcc/tree-sra.c | 4 +- > gcc/tree-ssa-alias.c | 14 +- > gcc/tree-ssa-ccp.c | 8 +- > gcc/tree-ssa-coalesce.c | 4 +- > gcc/tree-ssa-copy.c | 2 +- > gcc/tree-ssa-copyrename.c | 8 +- > gcc/tree-ssa-dce.c | 4 +- > gcc/tree-ssa-dom.c | 2 +- > gcc/tree-ssa-dse.c | 2 +- > gcc/tree-ssa-forwprop.c | 2 +- > gcc/tree-ssa-live.c | 8 +- > gcc/tree-ssa-loop-ch.c | 4 +- > gcc/tree-ssa-loop-im.c | 14 +- > gcc/tree-ssa-loop-ivcanon.c | 14 +- > gcc/tree-ssa-loop-niter.c | 20 +- > gcc/tree-ssa-loop-prefetch.c | 2 +- > gcc/tree-ssa-loop-unswitch.c | 2 +- > gcc/tree-ssa-loop.c | 10 +- > gcc/tree-ssa-math-opts.c | 30 +- > gcc/tree-ssa-operands.c | 4 +- > gcc/tree-ssa-phiopt.c | 14 +- > gcc/tree-ssa-phiprop.c | 2 +- > gcc/tree-ssa-pre.c | 8 +- > gcc/tree-ssa-reassoc.c | 8 +- > gcc/tree-ssa-sccvn.c | 4 +- > gcc/tree-ssa-sink.c | 2 +- > gcc/tree-ssa-strlen.c | 2 +- > gcc/tree-ssa-structalias.c | 10 +- > gcc/tree-ssa-tail-merge.c | 2 +- > gcc/tree-ssa-ter.c | 4 +- > gcc/tree-ssa-uncprop.c | 2 +- > gcc/tree-ssa-uninit.c | 4 +- > gcc/tree-streamer-out.c | 2 +- > gcc/tree-switch-conversion.c | 6 +- > gcc/tree-tailcall.c | 4 +- > gcc/tree-vect-data-refs.c | 2 +- > gcc/tree-vect-generic.c | 4 +- > gcc/tree-vect-loop.c | 6 +- > gcc/tree-vectorizer.c | 6 +- > gcc/tree-vectorizer.h | 6 +- > gcc/tree-vrp.c | 22 +- > gcc/tree.c | 30 +- > gcc/tree.h | 10 +- > gcc/tsan.c | 6 +- > gcc/ubsan.c | 12 +- > gcc/value-prof.c | 4 +- > gcc/var-tracking.c | 30 +- > gcc/varasm.c | 94 +-- > gcc/varpool.c | 4 +- > gcc/vmsdbgout.c | 84 +-- > gcc/vtable-verify.c | 4 +- > gcc/web.c | 2 +- > gcc/xcoffout.c | 6 +- > 553 files changed, 7478 insertions(+), 7479 deletions(-) > > -- > 1.8.5.3 >
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