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691697de09
"RTL" didn't make any sense, and now that there's no other bytecode to disambiguate against, just call it bytecode. * module/Makefile.am: * module/ice-9/eval-string.scm: * module/language/bytecode.scm: * module/language/bytecode/spec.scm: * module/language/cps/arities.scm: * module/language/cps/compile-bytecode.scm: * module/language/cps/compile-rtl.scm: * module/language/cps/contification.scm: * module/language/cps/elide-values.scm: * module/language/cps/primitives.scm: * module/language/cps/reify-primitives.scm: * module/language/cps/spec.scm: * module/language/cps/specialize-primcalls.scm: * module/language/rtl.scm: * module/language/rtl/spec.scm: * module/scripts/compile.scm: * module/system/base/compile.scm: * module/system/repl/common.scm: * module/system/vm/assembler.scm: * module/system/vm/debug.scm: * module/system/vm/disassembler.scm: * module/system/vm/dwarf.scm: * test-suite/tests/cross-compilation.test: * test-suite/tests/dwarf.test: * test-suite/tests/rtl-compilation.test: * test-suite/tests/rtl.test: * test-suite/vm/run-vm-tests.scm: Fixups.
492 lines
20 KiB
Scheme
492 lines
20 KiB
Scheme
;;; Continuation-passing style (CPS) intermediate language (IL)
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;; Copyright (C) 2013 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 arities)
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#:use-module (language cps closure-conversion)
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#:use-module (language cps contification)
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#:use-module (language cps constructors)
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#:use-module (language cps dfg)
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#:use-module (language cps elide-values)
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#:use-module (language cps primitives)
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#:use-module (language cps reify-primitives)
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#:use-module (language cps slot-allocation)
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#:use-module (language cps specialize-primcalls)
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#:use-module (system vm assembler)
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#:export (compile-bytecode))
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;; TODO: Local var names.
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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 (optimize exp opts)
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(define (run-pass exp pass kw default)
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(if (kw-arg-ref opts kw default)
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(pass exp)
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exp))
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;; Calls to source-to-source optimization passes go here.
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(let* ((exp (run-pass exp contify #:contify? #t))
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(exp (run-pass exp inline-constructors #:inline-constructors? #t))
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(exp (run-pass exp specialize-primcalls #:specialize-primcalls? #t))
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(exp (run-pass exp elide-values #:elide-values? #t)))
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;; Passes that are needed:
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;;
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;; * Abort contification: turning abort primcalls into continuation
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;; calls, and eliding prompts if possible.
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;;
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;; * Common subexpression elimination. Desperately needed. Requires
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;; effects analysis.
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;;
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;; * Loop peeling. Unrolls the first round through a loop if the
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;; loop has effects that CSE can work on. Requires effects
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;; analysis. When run before CSE, loop peeling is the equivalent
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;; of loop-invariant code motion (LICM).
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;;
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;; * Generic simplification pass, to be run as needed. Used to
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;; "clean up", both on the original raw input and after specific
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;; optimization passes.
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exp))
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(define (collect-conts f cfa)
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(let ((contv (make-vector (cfa-k-count cfa) #f)))
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(fold-local-conts
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(lambda (k cont tail)
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(let ((idx (cfa-k-idx cfa k #:default (lambda (k) #f))))
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(when idx
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(vector-set! contv idx cont))))
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'()
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(match f
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(($ $fun src meta free entry)
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entry)))
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contv))
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(define (compile-fun f asm)
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(let* ((dfg (compute-dfg f #:global? #f))
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(cfa (analyze-control-flow f dfg))
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(allocation (allocate-slots f dfg))
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(contv (collect-conts f cfa)))
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(define (lookup-cont k)
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(vector-ref contv (cfa-k-idx cfa k)))
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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 (maybe-mov dst src)
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(unless (= dst src)
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(emit-mov asm dst src)))
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(define (maybe-load-constant slot src)
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(call-with-values (lambda ()
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(lookup-maybe-constant-value src allocation))
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(lambda (has-const? val)
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(and has-const?
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(begin
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(emit-load-constant asm slot val)
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#t)))))
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(define (compile-entry meta)
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(match (vector-ref contv 0)
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(($ $kentry self tail clauses)
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(emit-begin-program asm (cfa-k-sym cfa 0) meta)
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(let lp ((n 1)
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(ks (map (match-lambda (($ $cont k) k)) clauses)))
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(match ks
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(()
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(unless (= n (vector-length contv))
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(error "unexpected end of clauses"))
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(emit-end-program asm))
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((k . ks)
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(unless (eq? (cfa-k-sym cfa n) k)
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(error "unexpected k" k))
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(lp (compile-clause n (and (pair? ks) (car ks)))
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ks)))))))
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(define (compile-clause n alternate)
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(match (vector-ref contv n)
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(($ $kclause ($ $arity req opt rest kw allow-other-keys?))
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(let* ((kw-indices (map (match-lambda
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((key name sym)
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(cons key (lookup-slot sym allocation))))
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kw))
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(k (cfa-k-sym cfa n))
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(nlocals (lookup-nlocals k allocation)))
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(emit-label asm k)
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(emit-begin-kw-arity asm req opt rest kw-indices
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allow-other-keys? nlocals alternate)
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(let ((next (compile-body (1+ n) nlocals)))
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(emit-end-arity asm)
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next)))))
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(define (compile-body n nlocals)
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(let compile-cont ((n n))
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(if (= n (vector-length contv))
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n
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(match (vector-ref contv n)
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(($ $kclause) n)
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(($ $kargs _ _ term)
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(emit-label asm (cfa-k-sym cfa n))
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(let find-exp ((term term))
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(match term
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(($ $letk conts term)
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(find-exp term))
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(($ $continue k src exp)
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(when src
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(emit-source asm src))
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(compile-expression n k exp nlocals)
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(compile-cont (1+ n))))))
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(_
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(emit-label asm (cfa-k-sym cfa n))
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(compile-cont (1+ n)))))))
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(define (compile-expression n k exp nlocals)
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(let* ((label (cfa-k-sym cfa n))
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(k-idx (cfa-k-idx cfa k))
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(fallthrough? (= k-idx (1+ n))))
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(define (maybe-emit-jump)
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(unless (= k-idx (1+ n))
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(emit-br asm k)))
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(match (vector-ref contv k-idx)
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(($ $ktail)
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(compile-tail label exp))
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(($ $kargs (name) (sym))
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(let ((dst (maybe-slot sym)))
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(when dst
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(compile-value label exp dst nlocals)))
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(maybe-emit-jump))
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(($ $kargs () ())
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(compile-effect label exp k nlocals)
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(maybe-emit-jump))
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(($ $kargs names syms)
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(compile-values label exp syms)
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(maybe-emit-jump))
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(($ $kif kt kf)
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(compile-test label exp kt kf
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(and (= k-idx (1+ n))
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(< (+ n 2) (cfa-k-count cfa))
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(cfa-k-sym cfa (+ n 2)))))
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(($ $ktrunc ($ $arity req () rest () #f) kargs)
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(compile-trunc label k exp (length req) (and rest #t) nlocals)
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(unless (and (= k-idx (1+ n))
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(< (+ n 2) (cfa-k-count cfa))
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(eq? (cfa-k-sym cfa (+ n 2)) kargs))
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(emit-br asm kargs))))))
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(define (compile-tail label exp)
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;; There are only three kinds of expressions in tail position:
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;; tail calls, multiple-value returns, and single-value returns.
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(match exp
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(($ $call proc args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm dst src)))
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(lookup-parallel-moves label allocation))
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(let ((tail-slots (cdr (iota (1+ (length args))))))
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(for-each maybe-load-constant tail-slots args))
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(emit-tail-call asm (1+ (length args))))
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(($ $values ())
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(emit-reset-frame asm 1)
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(emit-return-values asm))
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(($ $values (arg))
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(if (maybe-slot arg)
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(emit-return asm (slot arg))
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(begin
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(emit-load-constant asm 1 (constant arg))
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(emit-return asm 1))))
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(($ $values args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm dst src)))
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(lookup-parallel-moves label allocation))
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(let ((tail-slots (cdr (iota (1+ (length args))))))
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(for-each maybe-load-constant tail-slots args))
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(emit-reset-frame asm (1+ (length args)))
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(emit-return-values asm))
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(($ $primcall 'return (arg))
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(emit-return asm (slot arg)))))
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(define (compile-value label exp dst nlocals)
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(match exp
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(($ $values (arg))
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(or (maybe-load-constant dst arg)
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(maybe-mov dst (slot arg))))
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(($ $void)
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(emit-load-constant asm dst *unspecified*))
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(($ $const exp)
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(emit-load-constant asm dst exp))
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(($ $fun src meta () ($ $cont k))
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(emit-load-static-procedure asm dst k))
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(($ $fun src meta free ($ $cont k))
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(emit-make-closure asm dst k (length free)))
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(($ $call proc args)
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(let* ((proc-slot (lookup-call-proc-slot label allocation))
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(nargs (1+ (length args)))
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(arg-slots (map (lambda (x) (+ x proc-slot)) (iota nargs))))
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(for-each (match-lambda
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((src . dst) (emit-mov asm dst src)))
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(lookup-parallel-moves label allocation))
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(for-each maybe-load-constant arg-slots (cons proc args))
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(emit-call asm proc-slot nargs)
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(emit-receive asm dst proc-slot nlocals)))
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(($ $primcall 'current-module)
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(emit-current-module asm dst))
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(($ $primcall 'cached-toplevel-box (scope name bound?))
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(emit-cached-toplevel-box asm dst (constant scope) (constant name)
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(constant bound?)))
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(($ $primcall 'cached-module-box (mod name public? bound?))
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(emit-cached-module-box asm dst (constant mod) (constant name)
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(constant public?) (constant bound?)))
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(($ $primcall 'resolve (name bound?))
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(emit-resolve asm dst (constant bound?) (slot name)))
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(($ $primcall 'free-ref (closure idx))
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(emit-free-ref asm dst (slot closure) (constant idx)))
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(($ $primcall 'vector-ref (vector index))
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(emit-vector-ref asm dst (slot vector) (slot index)))
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(($ $primcall 'make-vector/immediate (length init))
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(emit-make-vector/immediate asm dst (constant length) (slot init)))
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(($ $primcall 'vector-ref/immediate (vector index))
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(emit-vector-ref/immediate asm dst (slot vector) (constant index)))
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(($ $primcall 'allocate-struct/immediate (vtable nfields))
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(emit-allocate-struct/immediate asm dst (slot vtable) (constant nfields)))
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(($ $primcall 'struct-ref/immediate (struct n))
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(emit-struct-ref/immediate asm dst (slot struct) (constant n)))
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(($ $primcall 'builtin-ref (name))
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(emit-builtin-ref asm dst (constant name)))
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(($ $primcall 'bv-u8-ref (bv idx))
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(emit-bv-u8-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-u16-ref (bv idx))
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(emit-bv-u16-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-s16-ref (bv idx))
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(emit-bv-s16-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-u32-ref (bv idx val))
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(emit-bv-u32-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-s32-ref (bv idx val))
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(emit-bv-s32-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-u64-ref (bv idx val))
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(emit-bv-u64-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-s64-ref (bv idx val))
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(emit-bv-s64-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-f32-ref (bv idx val))
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(emit-bv-f32-ref asm dst (slot bv) (slot idx)))
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(($ $primcall 'bv-f64-ref (bv idx val))
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(emit-bv-f64-ref asm dst (slot bv) (slot idx)))
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(($ $primcall name args)
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;; FIXME: Inline all the cases.
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(let ((inst (prim-instruction name)))
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(emit-text asm `((,inst ,dst ,@(map slot args))))))))
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(define (compile-effect label exp k nlocals)
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(match exp
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(($ $values ()) #f)
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(($ $prompt escape? tag handler pop)
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(match (lookup-cont handler)
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(($ $ktrunc ($ $arity req () rest () #f) khandler-body)
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(let ((receive-args (gensym "handler"))
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(nreq (length req))
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(proc-slot (lookup-call-proc-slot handler allocation)))
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(emit-prompt asm (slot tag) escape? proc-slot receive-args)
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(emit-br asm k)
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(emit-label asm receive-args)
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(emit-receive-values asm proc-slot (->bool rest) nreq)
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(when rest
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(emit-bind-rest asm (+ proc-slot 1 nreq)))
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(for-each (match-lambda
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((src . dst) (emit-mov asm dst src)))
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(lookup-parallel-moves handler allocation))
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(emit-reset-frame asm nlocals)
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(emit-br asm khandler-body)))))
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(($ $primcall 'cache-current-module! (sym scope))
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(emit-cache-current-module! asm (slot sym) (constant scope)))
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(($ $primcall 'free-set! (closure idx value))
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(emit-free-set! asm (slot closure) (slot value) (constant idx)))
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(($ $primcall 'box-set! (box value))
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(emit-box-set! asm (slot box) (slot value)))
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(($ $primcall 'struct-set!/immediate (struct index value))
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(emit-struct-set!/immediate asm (slot struct) (constant index) (slot value)))
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(($ $primcall 'vector-set! (vector index value))
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(emit-vector-set! asm (slot vector) (slot index) (slot value)))
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(($ $primcall 'vector-set!/immediate (vector index value))
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(emit-vector-set!/immediate asm (slot vector) (constant index)
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(slot value)))
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(($ $primcall 'variable-set! (var val))
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(emit-box-set! asm (slot var) (slot val)))
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(($ $primcall 'set-car! (pair value))
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(emit-set-car! asm (slot pair) (slot value)))
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(($ $primcall 'set-cdr! (pair value))
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(emit-set-cdr! asm (slot pair) (slot value)))
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(($ $primcall 'define! (sym value))
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(emit-define! asm (slot sym) (slot value)))
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(($ $primcall 'push-fluid (fluid val))
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(emit-push-fluid asm (slot fluid) (slot val)))
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(($ $primcall 'pop-fluid ())
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(emit-pop-fluid asm))
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(($ $primcall 'wind (winder unwinder))
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(emit-wind asm (slot winder) (slot unwinder)))
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(($ $primcall 'bv-u8-set! (bv idx val))
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(emit-bv-u8-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-u16-set! (bv idx val))
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(emit-bv-u16-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-s16-set! (bv idx val))
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(emit-bv-s16-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-u32-set! (bv idx val))
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(emit-bv-u32-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-s32-set! (bv idx val))
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(emit-bv-s32-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-u64-set! (bv idx val))
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(emit-bv-u64-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-s64-set! (bv idx val))
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(emit-bv-s64-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-f32-set! (bv idx val))
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(emit-bv-f32-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'bv-f64-set! (bv idx val))
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(emit-bv-f64-set! asm (slot bv) (slot idx) (slot val)))
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(($ $primcall 'unwind ())
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(emit-unwind asm))))
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(define (compile-values label exp syms)
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(match exp
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(($ $values args)
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(for-each (match-lambda
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((src . dst) (emit-mov asm dst src)))
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(lookup-parallel-moves label allocation))
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(for-each maybe-load-constant (map slot syms) args))))
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(define (compile-test label exp kt kf next-label)
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(define (unary op sym)
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(cond
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((eq? kt next-label)
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(op asm (slot sym) #t kf))
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(else
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(op asm (slot sym) #f kt)
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(unless (eq? kf next-label)
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(emit-br asm kf)))))
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(define (binary op a b)
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(cond
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((eq? kt next-label)
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(op asm (slot a) (slot b) #t kf))
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(else
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(op asm (slot a) (slot b) #f kt)
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(unless (eq? kf next-label)
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(emit-br asm kf)))))
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(match exp
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(($ $values (sym)) (unary emit-br-if-true sym))
|
|
(($ $primcall 'null? (a)) (unary emit-br-if-null a))
|
|
(($ $primcall 'nil? (a)) (unary emit-br-if-nil a))
|
|
(($ $primcall 'pair? (a)) (unary emit-br-if-pair a))
|
|
(($ $primcall 'struct? (a)) (unary emit-br-if-struct a))
|
|
(($ $primcall 'char? (a)) (unary emit-br-if-char a))
|
|
(($ $primcall 'symbol? (a)) (unary emit-br-if-symbol a))
|
|
(($ $primcall 'variable? (a)) (unary emit-br-if-variable a))
|
|
(($ $primcall 'vector? (a)) (unary emit-br-if-vector a))
|
|
(($ $primcall 'string? (a)) (unary emit-br-if-string a))
|
|
(($ $primcall 'bytevector? (a)) (unary emit-br-if-bytevector a))
|
|
;; Add more TC7 tests here. Keep in sync with
|
|
;; *branching-primcall-arities* in (language cps primitives) and
|
|
;; the set of macro-instructions in assembly.scm.
|
|
(($ $primcall 'eq? (a b)) (binary emit-br-if-eq a b))
|
|
(($ $primcall 'eqv? (a b)) (binary emit-br-if-eqv a b))
|
|
(($ $primcall 'equal? (a b)) (binary emit-br-if-equal a b))
|
|
(($ $primcall '< (a b)) (binary emit-br-if-< a b))
|
|
(($ $primcall '<= (a b)) (binary emit-br-if-<= a b))
|
|
(($ $primcall '= (a b)) (binary emit-br-if-= a b))
|
|
(($ $primcall '>= (a b)) (binary emit-br-if-<= b a))
|
|
(($ $primcall '> (a b)) (binary emit-br-if-< b a))))
|
|
|
|
(define (compile-trunc label k exp nreq rest? nlocals)
|
|
(match exp
|
|
(($ $call proc args)
|
|
(let* ((proc-slot (lookup-call-proc-slot label allocation))
|
|
(nargs (1+ (length args)))
|
|
(arg-slots (map (lambda (x) (+ x proc-slot)) (iota nargs))))
|
|
(for-each (match-lambda
|
|
((src . dst) (emit-mov asm dst src)))
|
|
(lookup-parallel-moves label allocation))
|
|
(for-each maybe-load-constant arg-slots (cons proc args))
|
|
(emit-call asm proc-slot nargs)
|
|
;; FIXME: Only allow more values if there is a rest arg.
|
|
;; Express values truncation by the presence of an
|
|
;; unused rest arg instead of implicitly.
|
|
(emit-receive-values asm proc-slot #t nreq)
|
|
(when rest?
|
|
(emit-bind-rest asm (+ proc-slot 1 nreq)))
|
|
(for-each (match-lambda
|
|
((src . dst) (emit-mov asm dst src)))
|
|
(lookup-parallel-moves k allocation))
|
|
(emit-reset-frame asm nlocals)))))
|
|
|
|
(match f
|
|
(($ $fun src meta free ($ $cont k ($ $kentry self tail clauses)))
|
|
;; FIXME: src on kentry instead?
|
|
(when src
|
|
(emit-source asm src))
|
|
(compile-entry (or meta '()))))))
|
|
|
|
(define (visit-funs proc exp)
|
|
(match exp
|
|
(($ $continue _ _ exp)
|
|
(visit-funs proc exp))
|
|
|
|
(($ $fun src meta free body)
|
|
(proc exp)
|
|
(visit-funs proc body))
|
|
|
|
(($ $letk conts body)
|
|
(visit-funs proc body)
|
|
(for-each (lambda (cont) (visit-funs proc cont)) conts))
|
|
|
|
(($ $cont sym ($ $kargs names syms body))
|
|
(visit-funs proc body))
|
|
|
|
(($ $cont sym ($ $kclause arity body))
|
|
(visit-funs proc body))
|
|
|
|
(($ $cont sym ($ $kentry self tail clauses))
|
|
(for-each (lambda (clause) (visit-funs proc clause)) clauses))
|
|
|
|
(_ (values))))
|
|
|
|
(define (compile-bytecode exp env opts)
|
|
(let* ((exp (fix-arities exp))
|
|
(exp (optimize exp opts))
|
|
(exp (convert-closures exp))
|
|
(exp (reify-primitives exp))
|
|
(asm (make-assembler)))
|
|
(visit-funs (lambda (fun)
|
|
(compile-fun fun asm))
|
|
exp)
|
|
(values (link-assembly asm #:page-aligned? (kw-arg-ref opts #:to-file? #f))
|
|
env
|
|
env)))
|