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e3cc0eeb3a
* module/system/vm/assembler.scm (emit-definition): Add representation field. (write-arities): Emit representations into the arities section. * module/system/vm/debug.scm (arity-definitions): Read representations. * module/system/vm/frame.scm (<binding>): Add representation field and binding-representation getter. (available-bindings): Pass representation to make-binding. (frame-binding-set!, frame-binding-ref, frame-call-representation): Pass representation to frame-local-ref / frame-local-set!. * test-suite/tests/rtl.test: Update definition instructions. * module/language/cps/slot-allocation.scm ($allocation): Add representations field. (lookup-representation): New public function. (allocate-slots): Pass representations to make-$allocation. * module/language/cps/compile-bytecode.scm (compile-function): Adapt to emit-definition change. * libguile/frames.h: * libguile/frames.c (scm_frame_local_ref, scm_frame_local_set_x): Take representation argument. (scm_to_stack_item_representation): New internal helper.
516 lines
23 KiB
Scheme
516 lines
23 KiB
Scheme
;;; Continuation-passing style (CPS) intermediate language (IL)
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;; Copyright (C) 2013, 2014, 2015 Free Software Foundation, Inc.
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Commentary:
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;;;
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;;; Compiling CPS to bytecode. The result is in the bytecode language,
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;;; which happens to be an ELF image as a bytecode.
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;;;
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;;; Code:
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(define-module (language cps compile-bytecode)
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#:use-module (ice-9 match)
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#:use-module (srfi srfi-1)
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#:use-module (language cps)
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#:use-module (language cps primitives)
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#:use-module (language cps slot-allocation)
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#:use-module (language cps utils)
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#:use-module (language cps closure-conversion)
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#:use-module (language cps optimize)
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#:use-module (language cps reify-primitives)
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#:use-module (language cps renumber)
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#:use-module (language cps split-rec)
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#:use-module (language cps intmap)
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#:use-module (language cps intset)
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#:use-module (system vm assembler)
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#:export (compile-bytecode))
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(define (kw-arg-ref args kw default)
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(match (memq kw args)
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((_ val . _) val)
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(_ default)))
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(define (intmap-for-each f map)
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(intmap-fold (lambda (k v seed) (f k v) seed) map *unspecified*))
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(define (intmap-select map set)
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(persistent-intmap
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(intset-fold
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(lambda (k out)
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(intmap-add! out k (intmap-ref map k)))
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set
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empty-intmap)))
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;; Any $values expression that continues to a $kargs and causes no
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;; shuffles is a forwarding label.
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(define (compute-forwarding-labels cps allocation)
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(fixpoint
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(lambda (forwarding-map)
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(intmap-fold (lambda (label target forwarding-map)
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(let ((new-target (intmap-ref forwarding-map target
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(lambda (target) target))))
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(if (eqv? target new-target)
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forwarding-map
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(intmap-replace forwarding-map label new-target))))
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forwarding-map forwarding-map))
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(intmap-fold (lambda (label cont forwarding-labels)
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(match cont
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(($ $kargs _ _ ($ $continue k _ ($ $values)))
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(match (lookup-parallel-moves label allocation)
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(()
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(match (intmap-ref cps k)
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(($ $ktail) forwarding-labels)
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(_ (intmap-add forwarding-labels label k))))
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(_ forwarding-labels)))
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(_ forwarding-labels)))
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cps empty-intmap)))
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(define (compile-function cps asm)
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(let* ((allocation (allocate-slots cps))
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(forwarding-labels (compute-forwarding-labels cps allocation))
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(frame-size #f))
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(define (forward-label k)
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(intmap-ref forwarding-labels k (lambda (k) k)))
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(define (elide-cont? label)
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(match (intmap-ref forwarding-labels label (lambda (_) #f))
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(#f #f)
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(target (not (eqv? label target)))))
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(define (maybe-slot sym)
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(lookup-maybe-slot sym allocation))
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(define (slot sym)
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(lookup-slot sym allocation))
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(define (constant sym)
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(lookup-constant-value sym allocation))
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(define (from-sp var)
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(- frame-size 1 var))
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(define (maybe-mov dst src)
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(unless (= dst src)
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(emit-mov asm (from-sp dst) (from-sp src))))
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(define (compile-tail label exp)
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;; There are only three kinds of expressions in tail position:
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;; tail calls, multiple-value returns, and single-value returns.
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(match exp
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(($ $call proc args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm (from-sp dst) (from-sp src))))
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(lookup-parallel-moves label allocation))
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(emit-tail-call asm (1+ (length args))))
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(($ $callk k proc args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm (from-sp dst) (from-sp src))))
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(lookup-parallel-moves label allocation))
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(emit-tail-call-label asm (1+ (length args)) k))
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(($ $values args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm (from-sp dst) (from-sp src))))
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(lookup-parallel-moves label allocation))
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(emit-return-values asm (1+ (length args))))))
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(define (compile-value label exp dst)
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(match exp
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(($ $values (arg))
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(maybe-mov dst (slot arg)))
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(($ $const exp)
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(emit-load-constant asm (from-sp dst) exp))
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(($ $closure k 0)
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(emit-load-static-procedure asm (from-sp dst) k))
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(($ $closure k nfree)
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(emit-make-closure asm (from-sp dst) k nfree))
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(($ $primcall 'current-module)
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(emit-current-module asm (from-sp dst)))
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(($ $primcall 'cached-toplevel-box (scope name bound?))
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(emit-cached-toplevel-box asm (from-sp dst)
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(constant scope) (constant name)
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(constant bound?)))
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(($ $primcall 'cached-module-box (mod name public? bound?))
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(emit-cached-module-box asm (from-sp dst)
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(constant mod) (constant name)
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(constant public?) (constant bound?)))
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(($ $primcall 'resolve (name bound?))
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(emit-resolve asm (from-sp dst) (constant bound?)
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(from-sp (slot name))))
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(($ $primcall 'free-ref (closure idx))
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(emit-free-ref asm (from-sp dst) (from-sp (slot closure))
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(constant idx)))
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(($ $primcall 'vector-ref (vector index))
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(emit-vector-ref asm (from-sp dst) (from-sp (slot vector))
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(from-sp (slot index))))
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(($ $primcall 'make-vector (length init))
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(emit-make-vector asm (from-sp dst) (from-sp (slot length))
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(from-sp (slot init))))
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(($ $primcall 'make-vector/immediate (length init))
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(emit-make-vector/immediate asm (from-sp dst) (constant length)
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(from-sp (slot init))))
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(($ $primcall 'vector-ref/immediate (vector index))
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(emit-vector-ref/immediate asm (from-sp dst) (from-sp (slot vector))
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(constant index)))
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(($ $primcall 'allocate-struct (vtable nfields))
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(emit-allocate-struct asm (from-sp dst) (from-sp (slot vtable))
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(from-sp (slot nfields))))
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(($ $primcall 'allocate-struct/immediate (vtable nfields))
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(emit-allocate-struct/immediate asm (from-sp dst)
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(from-sp (slot vtable))
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(constant nfields)))
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(($ $primcall 'struct-ref (struct n))
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(emit-struct-ref asm (from-sp dst) (from-sp (slot struct))
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(from-sp (slot n))))
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(($ $primcall 'struct-ref/immediate (struct n))
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(emit-struct-ref/immediate asm (from-sp dst) (from-sp (slot struct))
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(constant n)))
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(($ $primcall 'builtin-ref (name))
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(emit-builtin-ref asm (from-sp dst) (constant name)))
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(($ $primcall 'bv-u8-ref (bv idx))
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(emit-bv-u8-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-s8-ref (bv idx))
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(emit-bv-s8-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-u16-ref (bv idx))
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(emit-bv-u16-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-s16-ref (bv idx))
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(emit-bv-s16-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-u32-ref (bv idx val))
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(emit-bv-u32-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-s32-ref (bv idx val))
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(emit-bv-s32-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-u64-ref (bv idx val))
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(emit-bv-u64-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-s64-ref (bv idx val))
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(emit-bv-s64-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-f32-ref (bv idx val))
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(emit-bv-f32-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall 'bv-f64-ref (bv idx val))
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(emit-bv-f64-ref asm (from-sp dst) (from-sp (slot bv))
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(from-sp (slot idx))))
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(($ $primcall name args)
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;; FIXME: Inline all the cases.
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(let ((inst (prim-instruction name)))
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(emit-text asm `((,inst ,(from-sp dst)
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,@(map (compose from-sp slot) args))))))))
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(define (compile-effect label exp k)
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(match exp
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(($ $values ()) #f)
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(($ $prompt escape? tag handler)
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(match (intmap-ref cps handler)
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(($ $kreceive ($ $arity req () rest () #f) khandler-body)
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(let ((receive-args (gensym "handler"))
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(nreq (length req))
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(proc-slot (lookup-call-proc-slot label allocation)))
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(emit-prompt asm (from-sp (slot tag)) escape? proc-slot
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receive-args)
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(emit-br asm k)
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(emit-label asm receive-args)
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(unless (and rest (zero? nreq))
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(emit-receive-values asm proc-slot (->bool rest) nreq))
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(when (and rest
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(match (intmap-ref cps khandler-body)
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(($ $kargs names (_ ... rest))
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(maybe-slot rest))))
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(emit-bind-rest asm (+ proc-slot 1 nreq)))
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(for-each (match-lambda
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((src . dst) (emit-fmov asm dst src)))
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(lookup-parallel-moves handler allocation))
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(emit-reset-frame asm frame-size)
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(emit-br asm (forward-label khandler-body))))))
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(($ $primcall 'cache-current-module! (sym scope))
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(emit-cache-current-module! asm (from-sp (slot sym)) (constant scope)))
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(($ $primcall 'free-set! (closure idx value))
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(emit-free-set! asm (from-sp (slot closure)) (from-sp (slot value))
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(constant idx)))
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(($ $primcall 'box-set! (box value))
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(emit-box-set! asm (from-sp (slot box)) (from-sp (slot value))))
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(($ $primcall 'struct-set! (struct index value))
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(emit-struct-set! asm (from-sp (slot struct)) (from-sp (slot index))
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(from-sp (slot value))))
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(($ $primcall 'struct-set!/immediate (struct index value))
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(emit-struct-set!/immediate asm (from-sp (slot struct))
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(constant index) (from-sp (slot value))))
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(($ $primcall 'vector-set! (vector index value))
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(emit-vector-set! asm (from-sp (slot vector)) (from-sp (slot index))
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(from-sp (slot value))))
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(($ $primcall 'vector-set!/immediate (vector index value))
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(emit-vector-set!/immediate asm (from-sp (slot vector))
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(constant index) (from-sp (slot value))))
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(($ $primcall 'set-car! (pair value))
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(emit-set-car! asm (from-sp (slot pair)) (from-sp (slot value))))
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(($ $primcall 'set-cdr! (pair value))
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(emit-set-cdr! asm (from-sp (slot pair)) (from-sp (slot value))))
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(($ $primcall 'define! (sym value))
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(emit-define! asm (from-sp (slot sym)) (from-sp (slot value))))
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(($ $primcall 'push-fluid (fluid val))
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(emit-push-fluid asm (from-sp (slot fluid)) (from-sp (slot val))))
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(($ $primcall 'pop-fluid ())
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(emit-pop-fluid asm))
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(($ $primcall 'wind (winder unwinder))
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(emit-wind asm (from-sp (slot winder)) (from-sp (slot unwinder))))
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(($ $primcall 'bv-u8-set! (bv idx val))
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(emit-bv-u8-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-s8-set! (bv idx val))
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(emit-bv-s8-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-u16-set! (bv idx val))
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(emit-bv-u16-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-s16-set! (bv idx val))
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(emit-bv-s16-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-u32-set! (bv idx val))
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(emit-bv-u32-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-s32-set! (bv idx val))
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(emit-bv-s32-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-u64-set! (bv idx val))
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(emit-bv-u64-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-s64-set! (bv idx val))
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(emit-bv-s64-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-f32-set! (bv idx val))
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(emit-bv-f32-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'bv-f64-set! (bv idx val))
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(emit-bv-f64-set! asm (from-sp (slot bv)) (from-sp (slot idx))
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(from-sp (slot val))))
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(($ $primcall 'unwind ())
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(emit-unwind asm))))
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(define (compile-values label exp syms)
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(match exp
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(($ $values args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm (from-sp dst) (from-sp src))))
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(lookup-parallel-moves label allocation)))))
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(define (compile-test label exp kt kf next-label)
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(define (prefer-true?)
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(if (< (max kt kf) label)
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;; Two backwards branches. Prefer
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;; the nearest.
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(> kt kf)
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;; Otherwise prefer a backwards
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;; branch or a near jump.
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(< kt kf)))
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(define (unary op sym)
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(cond
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((eq? kt next-label)
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(op asm (from-sp (slot sym)) #t kf))
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((eq? kf next-label)
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(op asm (from-sp (slot sym)) #f kt))
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(else
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(let ((invert? (not (prefer-true?))))
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(op asm (from-sp (slot sym)) invert? (if invert? kf kt))
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(emit-br asm (if invert? kt kf))))))
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(define (binary op a b)
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(cond
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((eq? kt next-label)
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(op asm (from-sp (slot a)) (from-sp (slot b)) #t kf))
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((eq? kf next-label)
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(op asm (from-sp (slot a)) (from-sp (slot b)) #f kt))
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(else
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(let ((invert? (not (prefer-true?))))
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(op asm (from-sp (slot a)) (from-sp (slot b)) invert?
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(if invert? kf kt))
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(emit-br asm (if invert? kt kf))))))
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(match exp
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(($ $values (sym)) (unary emit-br-if-true sym))
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(($ $primcall 'null? (a)) (unary emit-br-if-null a))
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(($ $primcall 'nil? (a)) (unary emit-br-if-nil a))
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(($ $primcall 'pair? (a)) (unary emit-br-if-pair a))
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(($ $primcall 'struct? (a)) (unary emit-br-if-struct a))
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(($ $primcall 'char? (a)) (unary emit-br-if-char a))
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(($ $primcall 'symbol? (a)) (unary emit-br-if-symbol a))
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(($ $primcall 'variable? (a)) (unary emit-br-if-variable a))
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(($ $primcall 'vector? (a)) (unary emit-br-if-vector a))
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(($ $primcall 'string? (a)) (unary emit-br-if-string a))
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(($ $primcall 'bytevector? (a)) (unary emit-br-if-bytevector a))
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(($ $primcall 'bitvector? (a)) (unary emit-br-if-bitvector a))
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(($ $primcall 'keyword? (a)) (unary emit-br-if-keyword a))
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;; Add more TC7 tests here. Keep in sync with
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;; *branching-primcall-arities* in (language cps primitives) and
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;; the set of macro-instructions in assembly.scm.
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(($ $primcall 'eq? (a b)) (binary emit-br-if-eq a b))
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(($ $primcall 'eqv? (a b)) (binary emit-br-if-eqv a b))
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(($ $primcall 'equal? (a b)) (binary emit-br-if-equal a b))
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(($ $primcall '< (a b)) (binary emit-br-if-< a b))
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(($ $primcall '<= (a b)) (binary emit-br-if-<= a b))
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(($ $primcall '= (a b)) (binary emit-br-if-= a b))
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(($ $primcall '>= (a b)) (binary emit-br-if-<= b a))
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(($ $primcall '> (a b)) (binary emit-br-if-< b a))
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(($ $primcall 'logtest (a b)) (binary emit-br-if-logtest a b))))
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(define (compile-trunc label k exp nreq rest-var)
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(define (do-call proc args emit-call)
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(let* ((proc-slot (lookup-call-proc-slot label allocation))
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(nargs (1+ (length args)))
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(arg-slots (map (lambda (x) (+ x proc-slot)) (iota nargs))))
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(for-each (match-lambda
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((src . dst) (emit-mov asm (from-sp dst) (from-sp src))))
|
|
(lookup-parallel-moves label allocation))
|
|
(emit-call asm proc-slot nargs)
|
|
(emit-slot-map asm proc-slot (lookup-slot-map label allocation))
|
|
(cond
|
|
((and (= 1 nreq) (and rest-var) (not (maybe-slot rest-var))
|
|
(match (lookup-parallel-moves k allocation)
|
|
((((? (lambda (src) (= src (1+ proc-slot))) src)
|
|
. dst)) dst)
|
|
(_ #f)))
|
|
;; The usual case: one required live return value, ignoring
|
|
;; any additional values.
|
|
=> (lambda (dst)
|
|
(emit-receive asm dst proc-slot frame-size)))
|
|
(else
|
|
(unless (and (zero? nreq) rest-var)
|
|
(emit-receive-values asm proc-slot (->bool rest-var) nreq))
|
|
(when (and rest-var (maybe-slot rest-var))
|
|
(emit-bind-rest asm (+ proc-slot 1 nreq)))
|
|
(for-each (match-lambda
|
|
((src . dst) (emit-fmov asm dst src)))
|
|
(lookup-parallel-moves k allocation))
|
|
(emit-reset-frame asm frame-size)))))
|
|
(match exp
|
|
(($ $call proc args)
|
|
(do-call proc args
|
|
(lambda (asm proc-slot nargs)
|
|
(emit-call asm proc-slot nargs))))
|
|
(($ $callk k proc args)
|
|
(do-call proc args
|
|
(lambda (asm proc-slot nargs)
|
|
(emit-call-label asm proc-slot nargs k))))))
|
|
|
|
(define (skip-elided-conts label)
|
|
(if (elide-cont? label)
|
|
(skip-elided-conts (1+ label))
|
|
label))
|
|
|
|
(define (compile-expression label k exp)
|
|
(let* ((forwarded-k (forward-label k))
|
|
(fallthrough? (= forwarded-k (skip-elided-conts (1+ label)))))
|
|
(define (maybe-emit-jump)
|
|
(unless fallthrough?
|
|
(emit-br asm forwarded-k)))
|
|
(match (intmap-ref cps k)
|
|
(($ $ktail)
|
|
(compile-tail label exp))
|
|
(($ $kargs (name) (sym))
|
|
(let ((dst (maybe-slot sym)))
|
|
(when dst
|
|
(compile-value label exp dst)))
|
|
(maybe-emit-jump))
|
|
(($ $kargs () ())
|
|
(match exp
|
|
(($ $branch kt exp)
|
|
(compile-test label exp (forward-label kt) forwarded-k
|
|
(skip-elided-conts (1+ label))))
|
|
(_
|
|
(compile-effect label exp k)
|
|
(maybe-emit-jump))))
|
|
(($ $kargs names syms)
|
|
(compile-values label exp syms)
|
|
(maybe-emit-jump))
|
|
(($ $kreceive ($ $arity req () rest () #f) kargs)
|
|
(compile-trunc label k exp (length req)
|
|
(and rest
|
|
(match (intmap-ref cps kargs)
|
|
(($ $kargs names (_ ... rest)) rest))))
|
|
(let* ((kargs (forward-label kargs))
|
|
(fallthrough? (and fallthrough?
|
|
(= kargs (skip-elided-conts (1+ k))))))
|
|
(unless fallthrough?
|
|
(emit-br asm kargs)))))))
|
|
|
|
(define (compile-cont label cont)
|
|
(match cont
|
|
(($ $kfun src meta self tail clause)
|
|
(when src
|
|
(emit-source asm src))
|
|
(emit-begin-program asm label meta))
|
|
(($ $kclause ($ $arity req opt rest kw allow-other-keys?) body alt)
|
|
(let ((first? (match (intmap-ref cps (1- label))
|
|
(($ $kfun) #t)
|
|
(_ #f)))
|
|
(kw-indices (map (match-lambda
|
|
((key name sym)
|
|
(cons key (lookup-slot sym allocation))))
|
|
kw)))
|
|
(unless first?
|
|
(emit-end-arity asm))
|
|
(emit-label asm label)
|
|
(set! frame-size (lookup-nlocals label allocation))
|
|
(emit-begin-kw-arity asm req opt rest kw-indices allow-other-keys?
|
|
frame-size alt)))
|
|
(($ $kargs names vars ($ $continue k src exp))
|
|
(emit-label asm label)
|
|
(for-each (lambda (name var)
|
|
(let ((slot (maybe-slot var)))
|
|
(when slot
|
|
(let ((repr (lookup-representation var allocation)))
|
|
(emit-definition asm name slot repr)))))
|
|
names vars)
|
|
(when src
|
|
(emit-source asm src))
|
|
(unless (elide-cont? label)
|
|
(compile-expression label k exp)))
|
|
(($ $kreceive arity kargs)
|
|
(emit-label asm label))
|
|
(($ $ktail)
|
|
(emit-end-arity asm)
|
|
(emit-end-program asm))))
|
|
|
|
(intmap-for-each compile-cont cps)))
|
|
|
|
(define (emit-bytecode exp env opts)
|
|
(let ((asm (make-assembler)))
|
|
(intmap-for-each (lambda (kfun body)
|
|
(compile-function (intmap-select exp body) asm))
|
|
(compute-reachable-functions exp 0))
|
|
(values (link-assembly asm #:page-aligned? (kw-arg-ref opts #:to-file? #f))
|
|
env
|
|
env)))
|
|
|
|
(define (lower-cps exp opts)
|
|
;; FIXME: For now the closure conversion pass relies on $rec instances
|
|
;; being separated into SCCs. We should fix this to not be the case,
|
|
;; and instead move the split-rec pass back to
|
|
;; optimize-higher-order-cps.
|
|
(set! exp (split-rec exp))
|
|
(set! exp (optimize-higher-order-cps exp opts))
|
|
(set! exp (convert-closures exp))
|
|
(set! exp (optimize-first-order-cps exp opts))
|
|
(set! exp (reify-primitives exp))
|
|
(renumber exp))
|
|
|
|
(define (compile-bytecode exp env opts)
|
|
(set! exp (lower-cps exp opts))
|
|
(emit-bytecode exp env opts))
|