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mes/module/mescc/compile.scm
Jan Nieuwenhuizen 2611a64b2e
mescc: Add 70-struct-post.c test with fix. 
* lib/tests/scaffold/70-struct-post.c: New file.
* build-aux/check-mescc.sh (TESTS): Add it.
* module/mescc/compile.scm (expr->register): Use type size for rank
0 (WAS: 1).
2019-07-21 22:40:42 +02:00

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;;; GNU Mes --- Maxwell Equations of Software
;;; Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;;
;;; This file is part of GNU Mes.
;;;
;;; GNU Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(define-module (mescc compile)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9 gnu)
#:use-module (srfi srfi-26)
#:use-module (system base pmatch)
#:use-module (ice-9 optargs)
#:use-module (ice-9 pretty-print)
#:use-module (nyacc lang c99 pprint)
#:use-module (mes guile)
#:use-module (mes misc)
#:use-module (mescc preprocess)
#:use-module (mescc info)
#:use-module (mescc as)
#:use-module (mescc i386 as)
#:use-module (mescc M1)
#:export (c99-ast->info
c99-input->info
c99-input->object))
(define mes? (pair? (current-module)))
(define (cc-amd? info) #f) ; use AMD calling convention?
;; (define %reduced-register-count #f) ; use all registers?
(define %reduced-register-count 2) ; use reduced instruction set
(define (max-registers info)
(if %reduced-register-count %reduced-register-count
(length (append (.registers info) (.allocated info)))))
(define* (c99-input->info info #:key (prefix "") (defines '()) (includes '()))
(let ((ast (c99-input->ast #:prefix prefix #:defines defines #:includes includes)))
(c99-ast->info info ast)))
(define* (c99-ast->info info o)
(stderr "compiling: input\n")
(let ((info (ast->info o info)))
(clean-info info)))
(define (clean-info o)
(make <info>
#:functions (filter (compose pair? function:text cdr) (.functions o))
#:globals (.globals o)
#:types (.types o)))
(define (ident->constant name value)
(cons name value))
(define (enum->type-entry name fields)
(cons `(tag ,name) (make-type 'enum 4 fields)))
(define (struct->type-entry info name fields)
(let ((size (apply + (map (compose (cut ->size <> info) cdr) fields))))
(cons `(tag ,name) (make-type 'struct size fields))))
(define (union->type-entry info name fields)
(let ((size (apply max (map (compose (cut ->size <> info) cdr) fields))))
(cons `(tag ,name) (make-type 'union size fields))))
(define (signed? o)
(let ((type (->type o)))
(cond ((type? type) (eq? (type:type type) 'signed))
(else #f))))
(define (unsigned? o)
(let ((type (->type o)))
(cond ((type? type) (eq? (type:type type) 'unsigned))
(else #t))))
(define (->size o info)
(cond ((and (type? o) (eq? (type:type o) 'union))
(apply max (map (compose (cut ->size <> info) cdr) (struct->fields o))))
((type? o) (type:size o))
((pointer? o) (->size (get-type "*" info) info))
((c-array? o) (* (c-array:count o) ((compose (cut ->size <> info) c-array:type) o)))
((local? o) ((compose (cut ->size <> info) local:type) o))
((global? o) ((compose (cut ->size <> info) global:type) o))
((bit-field? o) ((compose (cut ->size <> info) bit-field:type) o))
((and (pair? o) (pair? (car o)) (bit-field? (cdar o))) ((compose (cut ->size <> info) cdar) o))
((string? o) (->size (get-type o info) info))
(else (error "->size>: not a <type>:" o))))
(define (ast->type o info)
(define (type-helper o info)
(if (getenv "MESC_DEBUG")
(stderr "type-helper: ~s\n" o))
(pmatch o
(,t (guard (type? t)) t)
(,p (guard (pointer? p)) p)
(,a (guard (c-array? a)) a)
(,b (guard (bit-field? b)) b)
((char ,value) (get-type "char" info))
((enum-ref . _) (get-type "default" info))
((fixed ,value) (get-type "default" info))
((float ,float) (get-type "float" info))
((void) (get-type "void" info))
((ident ,name) (ident->type info name))
((tag ,name) (or (get-type o info)
o))
(,name (guard (string? name))
(let ((type (get-type name info)))
(ast->type type info)))
((type-name (decl-spec-list ,type) (abs-declr (pointer . ,pointer)))
(let ((rank (pointer->rank `(pointer ,@pointer)))
(type (ast->type type info)))
(rank+= type rank)))
((type-name ,type) (ast->type type info))
((type-spec ,type) (ast->type type info))
((sizeof-expr ,expr) (get-type "default" info))
((sizeof-type ,type) (get-type "default" info))
((string ,string) (make-c-array (get-type "char" info) (1+ (string-length string))))
((decl-spec-list (type-spec ,type)) (ast->type type info))
((fctn-call (p-expr (ident ,name)) . _)
(or (and=> (assoc-ref (.functions info) name) function:type)
(get-type "default" info)))
((fctn-call (de-ref (p-expr (ident ,name))) . _)
(or (and=> (assoc-ref (.functions info) name) function:type)
(get-type "default" info)))
((fixed-type ,type) (ast->type type info))
((float-type ,type) (ast->type type info))
((type-spec ,type) (ast->type type info))
((typename ,type) (ast->type type info))
((array-ref ,index ,array) (rank-- (ast->type array info)))
((de-ref ,expr) (rank-- (ast->type expr info)))
((ref-to ,expr) (rank++ (ast->type expr info)))
((p-expr ,expr) (ast->type expr info))
((pre-inc ,expr) (ast->type expr info))
((post-inc ,expr) (ast->type expr info))
((struct-ref (ident ,type))
(or (get-type type info)
(let ((struct (if (pair? type) type `(tag ,type))))
(ast->type struct info))))
((union-ref (ident ,type))
(or (get-type type info)
(let ((struct (if (pair? type) type `(tag ,type))))
(ast->type struct info))))
((struct-def (ident ,name) . _)
(ast->type `(tag ,name) info))
((union-def (ident ,name) . _)
(ast->type `(tag ,name) info))
((struct-def (field-list . ,fields))
(let ((fields (append-map (struct-field info) fields)))
(make-type 'struct (apply + (map (cut field:size <> info) fields)) fields)))
((union-def (field-list . ,fields))
(let ((fields (append-map (struct-field info) fields)))
(make-type 'union (apply + (map (cut field:size <> info) fields)) fields)))
((enum-def (enum-def-list . ,fields))
(get-type "default" info))
((d-sel (ident ,field) ,struct)
(let ((type0 (ast->type struct info)))
(ast->type (field-type info type0 field) info)))
((i-sel (ident ,field) ,struct)
(let ((type0 (ast->type (rank-- (ast->type struct info)) info)))
(ast->type (field-type info type0 field) info)))
;; arithmetic
((pre-inc ,a) (ast->type a info))
((pre-dec ,a) (ast->type a info))
((post-inc ,a) (ast->type a info))
((post-dec ,a) (ast->type a info))
((add ,a ,b) (ast->type a info))
((sub ,a ,b) (ast->type a info))
((bitwise-and ,a ,b) (ast->type a info))
((bitwise-not ,a) (ast->type a info))
((bitwise-or ,a ,b) (ast->type a info))
((bitwise-xor ,a ,b) (ast->type a info))
((lshift ,a ,b) (ast->type a info))
((rshift ,a ,b) (ast->type a info))
((div ,a ,b) (ast->type a info))
((mod ,a ,b) (ast->type a info))
((mul ,a ,b) (ast->type a info))
((not ,a) (ast->type a info))
((pos ,a) (ast->type a info))
((neg ,a) (ast->type a info))
((eq ,a ,b) (ast->type a info))
((ge ,a ,b) (ast->type a info))
((gt ,a ,b) (ast->type a info))
((ne ,a ,b) (ast->type a info))
((le ,a ,b) (ast->type a info))
((lt ,a ,b) (ast->type a info))
;; logical
((or ,a ,b) (ast->type a info))
((and ,a ,b) (ast->type a info))
((cast (type-name ,type) ,expr) (ast->type type info))
((cast (type-name ,type (abs-declr ,pointer)) ,expr)
(let ((rank (pointer->rank pointer)))
(rank+= (ast->type type info) rank)))
((decl-spec-list (type-spec ,type)) (ast->type type info))
;; ;; `typedef int size; void foo (unsigned size u)
((decl-spec-list (type-spec ,type) (type-spec ,type2))
(ast->type type info))
((assn-expr ,a ,op ,b) (ast->type a info))
((cond-expr _ ,a ,b) (ast->type a info))
(_ (get-type o info))))
(let ((type (type-helper o info)))
(cond ((or (type? type)
(pointer? type) type
(c-array? type)) type)
((and (equal? type o) (pair? type) (eq? (car type) 'tag)) o)
((equal? type o)
(error "ast->type: not supported: " o))
(else (ast->type type info)))))
(define (ast->basic-type o info)
(let ((type (->type (ast->type o info))))
(cond ((type? type) type)
((equal? type o) o)
(else (ast->type type info)))))
(define (get-type o info)
(let ((t (assoc-ref (.types info) o)))
(pmatch t
((typedef ,next) (or (get-type next info) o))
(_ t))))
(define (ast-type->size info o)
(let ((type (->type (ast->type o info))))
(cond ((type? type) (type:size type))
(else (stderr "error: ast-type->size: ~s => ~s\n" o type)
4))))
(define (field:name o)
(pmatch o
((struct (,name ,type ,size ,pointer) . ,rest) name)
((union (,name ,type ,size ,pointer) . ,rest) name)
((,name . ,type) name)
(_ (error "field:name not supported:" o))))
(define (field:pointer o)
(pmatch o
((struct (,name ,type ,size ,pointer) . ,rest) pointer)
((union (,name ,type ,size ,pointer) . ,rest) pointer)
((,name . ,type) (->rank type))
(_ (error "field:pointer not supported:" o))))
(define (field:size o info)
(pmatch o
((struct . ,type) (apply + (map (cut field:size <> info) (struct->fields type))))
((union . ,type) (apply max (map (cut field:size <> info) (struct->fields type))))
((,name . ,type) (->size type info))
(_ (error (format #f "field:size: ~s\n" o)))))
(define (field-field info struct field)
(let ((fields (type:description struct)))
(let loop ((fields fields))
(if (null? fields) (error (format #f "no such field: ~a in ~s" field struct))
(let ((f (car fields)))
(cond ((equal? (car f) field) f)
((and (memq (car f) '(struct union)) (type? (cdr f))
(find (lambda (x) (equal? (car x) field)) (struct->fields (cdr f)))))
((eq? (car f) 'bits) (assoc field (cdr f)))
(else (loop (cdr fields)))))))))
(define (field-offset info struct field)
(if (eq? (type:type struct) 'union) 0
(let ((fields (type:description struct)))
(let loop ((fields fields) (offset 0))
(if (null? fields) (error (format #f "no such field: ~a in ~s" field struct))
(let ((f (car fields)))
(cond ((equal? (car f) field) offset)
((and (eq? (car f) 'struct) (type? (cdr f)))
(let ((fields (type:description (cdr f))))
(find (lambda (x) (equal? (car x) field)) fields)
(apply + (cons offset
(map (cut field:size <> info)
(member field (reverse fields)
(lambda (a b)
(equal? a (car b) field))))))))
((and (eq? (car f) 'union) (type? (cdr f))
(let ((fields (struct->fields (cdr f))))
(and (find (lambda (x) (equal? (car x) field)) fields)
offset))))
((and (eq? (car f) 'bits) (assoc-ref (cdr f) field)) offset)
(else (loop (cdr fields) (+ offset (field:size f info)))))))))))
(define (field-pointer info struct field)
(let ((field (field-field info struct field)))
(field:pointer field)))
(define (field-size info struct field)
(if (eq? (type:type struct) 'union) 0
(let ((field (field-field info struct field)))
(field:size field info))))
(define (field-size info struct field)
(let ((field (field-field info struct field)))
(field:size field info)))
(define (field-type info struct field)
(let ((field (field-field info struct field)))
(ast->type (cdr field) info)))
(define (struct->fields o)
(pmatch o
(_ (guard (and (type? o) (eq? (type:type o) 'struct)))
(append-map struct->fields (type:description o)))
(_ (guard (and (type? o) (eq? (type:type o) 'union)))
(append-map struct->fields (type:description o)))
((struct . ,type) (list (car (type:description type))))
((union . ,type) (list (car (type:description type))))
((bits . ,bits) bits)
(_ (list o))))
(define (struct->init-fields o) ;; FIXME REMOVEME: non-recursive unroll
(pmatch o
(_ (guard (and (type? o) (eq? (type:type o) 'struct)))
(append-map struct->init-fields (type:description o)))
(_ (guard (and (type? o) (eq? (type:type o) 'union)))
(list (car (type:description o))))
((struct . ,type) (struct->init-fields type))
((union . ,type) (list (car (type:description type))))
(_ (list o))))
(define (byte->hex.m1 o)
(string-drop o 2))
(define (asm->m1 o)
(let ((prefix ".byte "))
(if (not (string-prefix? prefix o)) (map (cut string-split <> #\space) (string-split o #\newline))
(let ((s (string-drop o (string-length prefix))))
(list (format #f "'~a'" (string-join (map byte->hex.m1 (cdr (string-split o #\space))) " ")))))))
(define (ident->variable info o)
(or (assoc-ref (.locals info) o)
(assoc-ref (.statics info) o)
(assoc-ref (filter (negate static-global?) (.globals info)) o)
(assoc-ref (.constants info) o)
(assoc-ref (.functions info) o)
(begin
(error "ident->variable: undefined variable:" o))))
(define (static-global? o)
((compose global:function cdr) o))
(define (string-global? o)
(and (pair? (car o))
(eq? (caar o) #:string)))
(define (ident->type info o)
(let ((var (ident->variable info o)))
(cond ((global? var) (global:type var))
((local? var) (local:type var))
((function? var) (function:type var))
((assoc-ref (.constants info) o) (assoc-ref (.types info) "default"))
((pair? var) (car var))
(else (stderr "error: ident->type ~s => ~s\n" o var)
#f))))
(define (local:pointer o)
(->rank o))
(define (ident->rank info o)
(->rank (ident->variable info o)))
(define (ident->size info o)
((compose type:size (cut ident->type info <>)) o))
(define (pointer->rank o)
(pmatch o
((pointer) 1)
((pointer ,pointer) (1+ (pointer->rank pointer)))))
(define (expr->rank info o)
(->rank (ast->type o info)))
(define (ast->size o info)
(->size (ast->type o info) info))
(define (append-text info text)
(clone info #:text (append (.text info) text)))
(define (make-global-entry name type value)
(cons name (make-global name type value #f)))
(define (string->global-entry string)
(let ((value (append (string->list string) (list #\nul))))
(make-global-entry `(#:string ,string) "char" value)))
(define (make-local-entry name type id)
(cons name (make-local name type id)))
(define* (mescc:trace name #:optional (type ""))
(format (current-error-port) " :~a~a\n" name type))
(define (expr->arg o i info)
(pmatch o
((p-expr (string ,string))
(let* ((globals ((globals:add-string (.globals info)) string))
(info (clone info #:globals globals))
(info (allocate-register info))
(info (append-text info (wrap-as (as info 'label->arg `(#:string ,string) i))))
(no-swap? (zero? (.pushed info)))
(info (if (cc-amd? info) info (free-register info)))
(info (if no-swap? info
(append-text info (wrap-as (as info 'swap-r1-stack))))))
info))
(_ (let* ((info (expr->register o info))
(info (append-text info (wrap-as (as info 'r->arg i))))
(no-swap? (zero? (.pushed info)))
(info (if (cc-amd? info) info (free-register info)))
(info (if no-swap? info
(append-text info (wrap-as (as info 'swap-r1-stack))))))
info))))
(define (globals:add-string globals)
(lambda (o)
(let ((string `(#:string ,o)))
(if (assoc-ref globals string) globals
(append globals (list (string->global-entry o)))))))
(define (ident->r info)
(lambda (o)
(cond ((assoc-ref (.locals info) o) => (cut local->r <> info))
((assoc-ref (.statics info) o) => (cut global->r <> info))
((assoc-ref (filter (negate static-global?) (.globals info)) o) => (cut global->r <> info))
((assoc-ref (.constants info) o) => (cut value->r <> info))
(else (wrap-as (as info 'label->r `(#:address ,o)))))))
(define (value->r o info)
(wrap-as (as info 'value->r o)))
(define (local->r o info)
(let* ((type (local:type o)))
(cond ((or (c-array? type)
(structured-type? type))
(wrap-as (as info 'local-ptr->r (local:id o))))
(else (append (wrap-as (as info 'local->r (local:id o)))
(convert-r0 info type))))))
(define (global->r o info)
(let ((type (global:type o)))
(cond ((or (c-array? type)
(structured-type? type)) (wrap-as (as info 'label->r `(#:address ,o))))
(else (append (wrap-as (as info 'label-mem->r `(#:address ,o)))
(convert-r0 info type))))))
(define (ident-address->r info)
(lambda (o)
(cond ((assoc-ref (.locals info) o)
=>
(lambda (local) (wrap-as (as info 'local-ptr->r (local:id local)))))
((assoc-ref (.statics info) o)
=>
(lambda (global) (wrap-as (as info 'label->r `(#:address ,global)))))
((assoc-ref (filter (negate static-global?) (.globals info)) o)
=>
(lambda (global) (wrap-as (as info 'label->r `(#:address ,global)))))
(else (wrap-as (as info 'label->r `(#:address ,o)))))))
(define (r->local+n-text info local n)
(let* ((id (local:id local))
(type (local:type local))
(type* (cond
((pointer? type) type)
((c-array? type) (c-array:type type))
((type? type) type)
(else
(stderr "unexpected type: ~s\n" type)
type)))
(size (->size type* info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size)))
(case size
((0) (wrap-as (as info 'r->local+n id n)))
((1) (wrap-as (as info 'byte-r->local+n id n)))
((2) (wrap-as (as info 'word-r->local+n id n)))
((4) (wrap-as (as info 'long-r->local+n id n)))
(else
(stderr "unexpected size:~s\n" size)
(wrap-as (as info 'r->local+n id n))))))
(define (r->ident info)
(lambda (o)
(cond ((assoc-ref (.locals info) o)
=>
(lambda (local) (let ((size (->size local info))
(r-size (->size "*" info)))
(wrap-as (as info 'r->local (local:id local))))))
((assoc-ref (.statics info) o)
=>
(lambda (global) (let* ((size (->size global info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size)))
(case size
((0) (wrap-as (as info 'r->label global)))
((1) (wrap-as (as info 'r->byte-label global)))
((2) (wrap-as (as info 'r->word-label global)))
((4) (wrap-as (as info 'r->long-label global)))
(else (wrap-as (as info 'r->label global)))))))
((assoc-ref (filter (negate static-global?) (.globals info)) o)
=>
(lambda (global) (let* ((size (->size global info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size)))
(case size
((0) (wrap-as (as info 'r->label global)))
((1) (wrap-as (as info 'r->byte-label global)))
((2) (wrap-as (as info 'r->word-label global)))
((4) (wrap-as (as info 'r->long-label global)))
(else (wrap-as (as info 'r->label global))))))))))
(define (ident-add info)
(lambda (o n)
(cond ((assoc-ref (.locals info) o)
=>
(lambda (local) (wrap-as (as info 'local-add (local:id local) n))))
((assoc-ref (.statics info) o)
=>
(lambda (global)
(let* ((size (->size global info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size)))
(case size
((0) (wrap-as (as info 'label-mem-add `(#:address ,o) n)))
((1) (wrap-as (as info 'byte-label-mem-add `(#:address ,o) n)))
((2) (wrap-as (as info 'word-label-mem-add `(#:address ,o) n)))
((4) (wrap-as (as info 'long-mem-add `(#:address ,o) n)))
(else (as info 'label-mem-add `(#:address ,o) n))))))
((assoc-ref (filter (negate static-global?) (.globals info)) o)
=>
(lambda (global)
(let* ((size (->size global info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size)))
(case size
((0) (wrap-as (as info 'label-mem-add `(#:address ,o) n)))
((1) (wrap-as (as info 'byte-label-mem-add `(#:address ,o) n)))
((2) (wrap-as (as info 'word-label-mem-add `(#:address ,o) n)))
((4) (wrap-as (as info 'long-mem-add `(#:address ,o) n)))
(else (as info 'label-mem-add `(#:address ,o) n)))))))))
(define (make-comment o)
(wrap-as `((#:comment ,o))))
(define (ast->comment o)
(if mes? '()
(let* ((source (with-output-to-string (lambda () (pretty-print-c99 o))))
;; Nyacc fixups
(source (string-substitute source "\\" "\\\\"))
(source (string-substitute source "'\\'" "'\\\\'"))
(source (string-substitute source "'\"'" "'\\\"'"))
(source (string-substitute source "'''" "'\\''"))
(source (string-substitute source "\n" "\\n"))
(source (string-substitute source "\r" "\\r")))
(make-comment source))))
(define (r*n info n)
(case n
((1) info)
((2) (append-text info (wrap-as (as info 'r+r))))
((3) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info)))
info))
((4) (append-text info (wrap-as (as info 'shl-r 2))))
((5) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info)))
info))
((6) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info))
(info (append-text info (wrap-as (append (as info 'shl-r 1))))))
info))
((8) (append-text info (wrap-as (append (as info 'shl-r 3)))))
((10) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info))
(info (append-text info (wrap-as (append (as info 'shl-r 1))))))
info))
((12) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info))
(info (append-text info (wrap-as (append (as info 'shl-r 2))))))
info))
((16) (append-text info (wrap-as (as info 'shl-r 4))))
((20) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info))
(info (append-text info (wrap-as (append (as info 'shl-r 2))))))
info))
((24) (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'r+r)
(as info 'r0+r1)))))
(info (free-register info))
(info (append-text info (wrap-as (append (as info 'shl-r 3))))))
info))
(else (let* ((info (allocate-register info))
(info (append-text info (wrap-as (as info 'value->r n))))
(info (append-text info (wrap-as (as info 'r0*r1))))
(info (free-register info)))
info))))
(define (allocate-register info)
(let ((registers (.registers info))
(allocated (.allocated info)))
(if (< (length allocated) (max-registers info))
(clone info #:allocated (cons (car registers) (.allocated info)) #:registers (cdr registers))
(let* ((info (clone info #:pushed (1+ (.pushed info))))
(info (append-text info (wrap-as (append (as info 'push-r0)
(as info 'r1->r0))))))
info))))
(define (free-register info)
(let ((allocated (.allocated info))
(pushed (.pushed info)))
(if (zero? pushed)
(clone info #:allocated (cdr allocated) #:registers (cons (car allocated) (.registers info)))
(let* ((info (clone info #:pushed (1- pushed)))
(info (append-text info (wrap-as (append (as info 'r0->r1)
(as info 'pop-r0))))))
info))))
(define (push-register r info)
(append-text info (wrap-as (as info 'push-register r))))
(define (pop-register r info)
(append-text info (wrap-as (as info 'pop-register r))))
(define (r0->r1-mem*n- info n size)
(let ((reg-size (->size "*" info)))
(wrap-as
(cond
((= n 1) (as info 'byte-r0->r1-mem))
((= n 2) (cond ((= size 1) (append (as info 'byte-r0->r1-mem)
(as info 'r+value 1)
(as info 'value->r0 0)
(as info 'byte-r0->r1-mem)))
(else (as info 'word-r0->r1-mem))))
((= n 4) (as info 'long-r0->r1-mem))
((and (= n 8) (or (= reg-size 8)
(= size 4)))
(cond ((= size 4) (append (as info 'long-r0->r1-mem)
(as info 'r+value 4)
(as info 'value->r0 0)
(as info 'long-r0->r1-mem)))
((and (= size 8) (= reg-size 8)) (as info 'quad-r0->r1-mem))
(else (error "r0->r1-mem*n-: not supported"))))
(else (let loop ((i 0))
(if (>= i n) '()
(case (- n i)
((1) (as info 'byte-r0-mem->r1-mem))
((2) (as info 'word-r0-mem->r1-mem))
((3) (append (as info 'word-r0-mem->r1-mem)
(as info 'r+value 2)
(as info 'r0+value 2)
(loop (+ i 2))))
((4) (append (as info 'long-r0-mem->r1-mem)))
(else (append (as info 'r0-mem->r1-mem)
(as info 'r+value reg-size)
(as info 'r0+value reg-size)
(loop (+ i reg-size))))))))))))
(define (r0->r1-mem*n info n size)
(append-text info (r0->r1-mem*n- info n size)))
(define (expr->register* o info)
(pmatch o
((p-expr (ident ,name))
(let ((info (allocate-register info)))
(append-text info ((ident-address->r info) name))))
((de-ref ,expr)
(expr->register expr info))
((d-sel (ident ,field) ,struct)
(let* ((type (ast->basic-type struct info))
(offset (field-offset info type field))
(info (expr->register* struct info)))
(append-text info (wrap-as (as info 'r+value offset)))))
((i-sel (ident ,field) (fctn-call (p-expr (ident ,function)) . ,rest))
(let* ((type (ast->basic-type `(fctn-call (p-expr (ident ,function)) ,@rest) info))
(offset (field-offset info type field))
(info (expr->register `(fctn-call (p-expr (ident ,function)) ,@rest) info)))
(append-text info (wrap-as (as info 'r+value offset)))))
((i-sel (ident ,field) ,struct)
(let* ((type (ast->basic-type struct info))
(offset (field-offset info type field))
(info (expr->register* struct info))
(type (ast->type struct info)))
(append-text info (append (if (c-array? type) '()
(wrap-as (as info 'mem->r)))
(wrap-as (as info 'r+value offset))))))
((array-ref ,index ,array)
(let* ((info (expr->register index info))
(size (ast->size o info))
(info (r*n info size))
(info (expr->register array info))
(info (append-text info (wrap-as (as info 'r0+r1))))
(info (free-register info)))
info))
((cast ,type ,expr)
(expr->register `(ref-to ,expr) info))
((add ,a ,b)
(let* ((rank (expr->rank info a))
(rank-b (expr->rank info b))
(type (ast->basic-type a info))
(struct? (structured-type? type))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info a))
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1))))
(if (or (= size 1)) ((binop->r* info) a b 'r0+r1)
(let* ((info (expr->register b info))
(info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0*r1)))))
(info (free-register info))
(info (expr->register* a info))
(info (append-text info (wrap-as (as info 'r0+r1))))
(info (free-register info)))
info))))
((sub ,a ,b)
(let* ((rank (expr->rank info a))
(rank-b (expr->rank info b))
(type (ast->basic-type a info))
(struct? (structured-type? type))
(size (->size type info))
(reg-size (->size "*" info))
(size (cond ((= rank 1) size)
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1))))
(if (or (= size 1) (or (= rank-b 2) (= rank-b 1)))
(let ((info ((binop->r* info) a b 'r0-r1)))
(if (and (not (= rank-b 2)) (not (= rank-b 1))) info
;; FIXME: c&p 1158
(let* ((info (allocate-register info))
(info (append-text info (wrap-as (append
(as info 'value->r size)
(as info 'swap-r0-r1)
(as info 'r0/r1 #f)))))
(info (append-text info (wrap-as (append (as info 'swap-r0-r1)))))
(free-register info))
info)))
(let* ((info (expr->register* b info))
(info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0*r1)))))
(info (free-register info))
(info (expr->register* a info))
(info (append-text info (wrap-as (append (as info 'swap-r0-r1)))))
(info (append-text info (wrap-as (as info 'r0-r1))))
(info (free-register info)))
info))))
((post-dec ,expr)
(let* ((info (expr->register* expr info))
(post (clone info #:text '()))
(post (allocate-register post))
(post (append-text post (wrap-as (as post 'r0->r1))))
(rank (expr->rank post expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size post expr))
((> rank 1) reg-size)
(else 1)))
(post ((expr-add post) expr (- size))))
(clone info #:post (.text post))))
((post-inc ,expr)
(let* ((info (expr->register* expr info))
(post (clone info #:text '()))
(post (allocate-register post))
(post (append-text post (wrap-as (as post 'r0->r1))))
(rank (expr->rank post expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size post expr))
((> rank 1) reg-size)
(else 1)))
(post ((expr-add post) expr size)))
(clone info #:post (.text post))))
((pre-dec ,expr)
(let* ((rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info expr))
((> rank 1) reg-size)
(else 1)))
(info ((expr-add info) expr (- size)))
(info (append (expr->register* expr info))))
info))
((pre-inc ,expr)
(let* ((rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info expr))
((> rank 1) reg-size)
(else 1)))
(info ((expr-add info) expr size))
(info (append (expr->register* expr info))))
info))
(_ (error "expr->register*: not supported: " o))))
(define (expr-add info)
(lambda (o n)
(let* ((info (expr->register* o info))
(size (ast->size o info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size))
(info (append-text info (wrap-as (append (as info
(case size
((0) 'r-mem-add)
((1) 'r-byte-mem-add)
((2) 'r-word-mem-add)
((4) 'r-long-mem-add)) n))))))
(free-register info))))
(define (expr->register o info)
(let* ((locals (.locals info))
(text (.text info))
(globals (.globals info))
(r-size (->size "*" info)))
(define (helper)
(pmatch o
((expr) info)
((comma-expr)
(allocate-register info))
((comma-expr ,a . ,rest)
(let* ((info (expr->register a info))
(info (free-register info)))
(expr->register `(comma-expr ,@rest) info)))
((p-expr (string ,string))
(let* ((globals ((globals:add-string globals) string))
(info (clone info #:globals globals))
(info (allocate-register info)))
(append-text info (wrap-as (as info 'label->r `(#:string ,string))))))
((p-expr (string . ,strings))
(let* ((string (apply string-append strings))
(globals ((globals:add-string globals) string))
(info (clone info #:globals globals))
(info (allocate-register info)))
(append-text info (wrap-as (as info 'label->r `(#:string ,string))))))
((p-expr (fixed ,value))
(let* ((value (cstring->int value))
(reg-size (->size "*" info))
(info (allocate-register info))
(info (append-text info (wrap-as (as info 'value->r value)))))
(if (or #t (> value 0) (= reg-size 4)) info
(append-text info (wrap-as (as info 'long-signed-r))))))
((p-expr (float ,value))
(let ((value (cstring->float value))
(info (allocate-register info)))
(append-text info (wrap-as (as info 'value->r value)))))
((neg (p-expr (fixed ,value)))
(let* ((value (- (cstring->int value)))
(info (allocate-register info))
(info (append-text info (append (wrap-as (as info 'value->r value)))))
(reg-size (->size "*" info)))
(if (or #t (> value 0) (= reg-size 4)) info
(append-text info (wrap-as (as info 'long-signed-r))))))
((p-expr (char ,char))
(let ((char (char->integer (car (string->list char))))
(info (allocate-register info)))
(append-text info (wrap-as (as info 'value->r char)))))
(,char (guard (char? char))
(let ((info (allocate-register info)))
(append-text info (wrap-as (as info 'value->r char)))))
((p-expr (ident ,name))
(let ((info (allocate-register info)))
(append-text info ((ident->r info) name))))
((initzer ,initzer)
(expr->register initzer info))
(((initzer ,initzer))
(expr->register initzer info))
;; offsetoff
((ref-to (i-sel (ident ,field) (cast (type-name (decl-spec-list ,struct) (abs-declr (pointer))) (p-expr (fixed ,base)))))
(let* ((type (ast->basic-type struct info))
(offset (field-offset info type field))
(base (cstring->int base))
(info (allocate-register info)))
(append-text info (wrap-as (as info 'value->r (+ base offset))))))
;; &foo
((ref-to (p-expr (ident ,name)))
(let ((info (allocate-register info)))
(append-text info ((ident-address->r info) name))))
;; &*foo
((ref-to (de-ref ,expr))
(expr->register expr info))
((ref-to ,expr)
(expr->register* expr info))
((sizeof-expr ,expr)
(let ((info (allocate-register info)))
(append-text info (wrap-as (as info 'value->r (ast->size expr info))))))
((sizeof-type ,type)
(let ((info (allocate-register info)))
(append-text info (wrap-as (as info 'value->r (ast->size type info))))))
((array-ref ,index ,array)
(let* ((info (expr->register* o info))
(type (ast->type o info)))
(append-text info (mem->r type info))))
((d-sel ,field ,struct)
(let* ((info (expr->register* o info))
(info (append-text info (ast->comment o)))
(type (ast->type o info))
(size (->size type info))
(array? (c-array? type)))
(if array? info
(append-text info (mem->r type info)))))
((i-sel ,field ,struct)
(let* ((info (expr->register* o info))
(info (append-text info (ast->comment o)))
(type (ast->type o info))
(size (->size type info))
(array? (c-array? type)))
(if array? info
(append-text info (mem->r type info)))))
((de-ref ,expr)
(let* ((info (expr->register expr info))
(type (ast->type o info)))
(append-text info (mem->r type info))))
((fctn-call (p-expr (ident ,name)) (expr-list . ,expr-list))
(if (equal? name "asm") (let ((arg0 (cadr (cadar expr-list))))
(append-text info (wrap-as (asm->m1 arg0))))
(let* ((info (append-text info (ast->comment o)))
(info (allocate-register info))
(allocated (.allocated info))
(pushed (.pushed info))
(registers (.registers info))
(info (fold push-register info (cdr allocated)))
(reg-size (->size "*" info))
(info (if (cc-amd? info) (fold expr->arg info expr-list (iota (length expr-list)))
(fold-right expr->arg info expr-list (reverse (iota (length expr-list))))))
(info (clone info #:allocated '() #:pushed 0 #:registers (append (reverse allocated) registers)))
(n (length expr-list))
(info (if (not (assoc-ref locals name))
(begin
(when (and (not (assoc name (.functions info)))
(not (assoc name globals))
(not (equal? name (.function info))))
(stderr "warning: undeclared function: ~a\n" name))
(append-text info (wrap-as (as info 'call-label name n))))
(let* ((info (expr->register `(p-expr (ident ,name)) info))
(info (append-text info (wrap-as (as info 'call-r n)))))
info)))
(info (clone info #:allocated allocated #:pushed pushed #:registers registers))
(info (if (null? (cdr allocated)) info
(append-text info (wrap-as (as info 'return->r)))))
(info (fold-right pop-register info (cdr allocated))))
info)))
((fctn-call ,function (expr-list . ,expr-list))
(let* ((info (append-text info (ast->comment o)))
(info (allocate-register info))
(allocated (.allocated info))
(pushed (.pushed info))
(registers (.registers info))
(info (fold push-register info (cdr allocated)))
(reg-size (->size "*" info))
(info (if (cc-amd? info) (fold expr->arg info expr-list (iota (length expr-list)))
(fold-right expr->arg info expr-list (reverse (iota (length expr-list))))))
(info (fold (lambda (x info) (free-register info)) info (.allocated info)))
(n (length expr-list))
(function (pmatch function
((de-ref ,function) function)
(_ function)))
(info (expr->register function info))
(info (append-text info (wrap-as (as info 'call-r n))))
(info (free-register info))
(info (clone info #:allocated allocated #:pushed pushed #:registers registers))
(info (if (null? (cdr allocated)) info
(append-text info (wrap-as (as info 'return->r)))))
(info (fold-right pop-register info (cdr allocated))))
info))
((cond-expr ,test ,then ,else)
(let* ((info (append-text info (ast->comment `(cond-expr ,test (ellipsis) (ellipsis)))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(else-label (string-append label "else"))
(break-label (string-append label "break"))
(info ((test-jump-label->info info else-label) test))
(info (expr->register then info))
(info (free-register info))
(info (append-text info (wrap-as (as info 'jump break-label))))
(info (append-text info (wrap-as `((#:label ,else-label)))))
(info (expr->register else info))
(info (free-register info))
(info (append-text info (wrap-as `((#:label ,break-label)))))
(info (allocate-register info)))
info))
((post-inc ,expr)
(let* ((info (append (expr->register expr info)))
(rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info expr))
((> rank 1) reg-size)
(else 1)))
(info ((expr-add info) expr size)))
info))
((post-dec ,expr)
(let* ((info (append (expr->register expr info)))
(rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info expr))
((> rank 1) reg-size)
(else 1)))
(info ((expr-add info) expr (- size))))
info))
((pre-inc ,expr)
(let* ((rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info expr))
((> rank 1) reg-size)
(else 1)))
(info ((expr-add info) expr size))
(info (append (expr->register expr info))))
info))
((pre-dec ,expr)
(let* ((rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info expr))
((> rank 1) reg-size)
(else 1)))
(info ((expr-add info) expr (- size)))
(info (append (expr->register expr info))))
info))
((add ,a (p-expr (fixed ,value)))
(let* ((rank (expr->rank info a))
(type (ast->basic-type a info))
(struct? (structured-type? type))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info a))
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1)))
(info (expr->register a info))
(value (cstring->int value))
(value (* size value)))
(append-text info (wrap-as (as info 'r+value value)))))
((add ,a ,b)
(let* ((rank (expr->rank info a))
(rank-b (expr->rank info b))
(type (ast->basic-type a info))
(struct? (structured-type? type))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info a))
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1))))
(if (or (= size 1)) ((binop->r info) a b 'r0+r1)
(let* ((info (expr->register b info))
(info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0*r1)))))
(info (free-register info))
(info (expr->register a info))
(info (append-text info (wrap-as (as info 'r0+r1))))
(info (free-register info)))
info))))
((sub ,a (p-expr (fixed ,value)))
(let* ((rank (expr->rank info a))
(type (ast->basic-type a info))
(struct? (structured-type? type))
(size (->size type info))
(reg-size (->size "*" info))
(size (cond ((= rank 1) size)
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1)))
(info (expr->register a info))
(value (cstring->int value))
(value (* size value)))
(append-text info (wrap-as (as info 'r+value (- value))))))
((sub ,a ,b)
(let* ((rank (expr->rank info a))
(rank-b (expr->rank info b))
(type (ast->basic-type a info))
(struct? (structured-type? type))
(size (->size type info))
(reg-size (->size "*" info))
(size (cond ((= rank 1) size)
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1))))
(if (or (= size 1) (or (= rank-b 2) (= rank-b 1)))
(let ((info ((binop->r info) a b 'r0-r1)))
(if (and (not (= rank-b 2)) (not (= rank-b 1))) info
;; FIXME: c&p 792
(let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0/r1 #f)))))
(info (free-register info)))
info)))
(let* ((info (expr->register b info))
(info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0*r1)))))
(info (free-register info))
(info (expr->register a info))
(info (append-text info (wrap-as (append (as info 'swap-r0-r1)))))
(info (append-text info (wrap-as (as info 'r0-r1))))
(info (free-register info)))
info))))
((bitwise-and ,a ,b) ((binop->r info) a b 'r0-and-r1))
((bitwise-not ,expr)
(let ((info (expr->register expr info)))
(append-text info (wrap-as (as info 'not-r)))))
((bitwise-or ,a ,b) ((binop->r info) a b 'r0-or-r1))
((bitwise-xor ,a ,b) ((binop->r info) a b 'r0-xor-r1))
((lshift ,a ,b) ((binop->r info) a b 'r0<<r1))
((rshift ,a ,b) ((binop->r info) a b 'r0>>r1))
((div ,a ,b)
((binop->r info) a b 'r0/r1
(or (signed? (ast->type a info)) (signed? (ast->type b info)))))
((mod ,a ,b) ((binop->r info) a b 'r0%r1
(or (signed? (ast->type a info)) (signed? (ast->type b info)))))
((mul ,a ,b) ((binop->r info) a b 'r0*r1))
((not ,expr)
(let* ((info (expr->register expr info))
(info (append-text info (wrap-as (as info 'test-r))))
(info (append-text info (wrap-as (as info 'r-negate)))))
(append-text info (wrap-as (as info 'test-r))))) ;; hmm, use ast->info?
((pos ,expr)
(expr->register expr info))
((neg ,expr)
(let* ((info (expr->register expr info))
(info (allocate-register info))
(info (append-text info (append (wrap-as (as info 'value->r 0))
(wrap-as (as info 'swap-r0-r1))
(wrap-as (as info 'r0-r1)))))
(info (free-register info)))
info))
((eq ,a ,b) (let ((info ((binop->r info) a b 'r0-r1)))
(append-text info (wrap-as (as info 'zf->r)))))
((ge ,a ,b)
(let* ((type-a (ast->type a info))
(type-b (ast->type b info))
(info ((binop->r info) a b 'r0-r1))
(test->r (if (or (unsigned? type-a) (unsigned? type-b)) 'ae?->r 'ge?->r))
(info (append-text info (wrap-as (as info test->r))))
(info (append-text info (wrap-as (as info 'test-r)))))
info))
((gt ,a ,b)
(let* ((type-a (ast->type a info))
(type-b (ast->type b info))
(info ((binop->r info) a b 'r0-r1))
(test->r (if (or (unsigned? type-a) (unsigned? type-b)) 'a?->r 'g?->r))
(info (append-text info (wrap-as (as info test->r))))
(info (append-text info (wrap-as (as info 'test-r)))))
info))
((ne ,a ,b) (let* ((info ((binop->r info) a b 'r0-r1))
(info (append-text info (wrap-as (as info 'test-r))))
(info (append-text info (wrap-as (as info 'xor-zf))))
(info (append-text info (wrap-as (as info 'zf->r)))))
info))
((le ,a ,b)
(let* ((type-a (ast->type a info))
(type-b (ast->type b info))
(info ((binop->r info) a b 'r0-r1))
(test->r (if (or (unsigned? type-a) (unsigned? type-b)) 'be?->r 'le?->r))
(info (append-text info (wrap-as (as info test->r))))
(info (append-text info (wrap-as (as info 'test-r)))))
info))
((lt ,a ,b)
(let* ((type-a (ast->type a info))
(type-b (ast->type b info))
(info ((binop->r info) a b 'r0-r1))
(test->r (if (or (unsigned? type-a) (unsigned? type-b)) 'b?->r 'l?->r))
(info (append-text info (wrap-as (as info test->r))))
(info (append-text info (wrap-as (as info 'test-r)))))
info))
((or ,a ,b)
(let* ((info (expr->register a info))
(here (number->string (length (.text info))))
(skip-b-label (string-append "_" (.function info) "_" here "_or_skip_b"))
(info (append-text info (wrap-as (as info 'test-r))))
(info (append-text info (wrap-as (as info 'jump-nz skip-b-label))))
(info (append-text info (wrap-as (as info 'test-r))))
(info (free-register info))
(info (expr->register b info))
(info (append-text info (wrap-as (as info 'test-r))))
(info (append-text info (wrap-as `((#:label ,skip-b-label))))))
info))
((and ,a ,b)
(let* ((info (expr->register a info))
(here (number->string (length (.text info))))
(skip-b-label (string-append "_" (.function info) "_" here "_and_skip_b"))
(info (append-text info (wrap-as (as info 'test-r))))
(info (append-text info (wrap-as (as info 'jump-z skip-b-label))))
(info (append-text info (wrap-as (as info 'test-r))))
(info (free-register info))
(info (expr->register b info))
(info (append-text info (wrap-as (as info 'test-r))))
(info (append-text info (wrap-as `((#:label ,skip-b-label))))))
info))
((cast ,type ,expr)
(let ((info (expr->register expr info))
(type (ast->type o info)))
(append-text info (convert-r0 info type))))
((assn-expr (de-ref (post-inc (p-expr (ident ,name)))) (op ,op) ,b)
(let* ((info (expr->register `(assn-expr (de-ref (p-expr (ident ,name))) (op ,op) ,b) info))
(type (ident->type info name))
(rank (ident->rank info name))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info `(p-expr (ident ,name))))
((> rank 1) reg-size)
(else 1))))
(append-text info ((ident-add info) name size))))
((assn-expr (de-ref (post-dec (p-expr (ident ,name)))) (op ,op) ,b)
(let* ((info (expr->register `(assn-expr (de-ref (p-expr (ident ,name))) (op ,op) ,b) info))
(type (ident->type info name))
(rank (ident->rank info name))
(reg-size (->size "*" info))
(size (cond ((= rank 1) (ast-type->size info `(p-expr (ident ,name))))
((> rank 1) reg-size)
(else 1))))
(append-text info ((ident-add info) name (- size)))))
((assn-expr ,a (op ,op) ,b)
(let* ((info (append-text info (ast->comment o)))
(type (ast->type a info))
(rank (->rank type))
(type-b (ast->type b info))
(rank-b (->rank type-b))
(reg-size (->size "*" info))
(size (if (zero? rank) (->size type info) reg-size))
(size-b (if (zero? rank-b) (->size type-b info) reg-size))
(info (expr->register b info))
(info (if (equal? op "=") info
(let* ((struct? (structured-type? type))
(size (cond ((= rank 1) (ast-type->size info a))
((> rank 1) reg-size)
((and struct? (= rank 2)) reg-size)
(else 1)))
(info (if (or (= size 1) (= rank-b 1)) info
(let* ((info (allocate-register info))
(info (append-text info (wrap-as (as info 'value->r size))))
(info (append-text info (wrap-as (as info 'r0*r1))))
(info (free-register info)))
info)))
(info (expr->register a info))
(info (append-text info (wrap-as (as info 'swap-r0-r1))))
(signed? (or (signed? type) (signed? type-b)))
(info (append-text info (cond ((equal? op "+=") (wrap-as (as info 'r0+r1)))
((equal? op "-=") (wrap-as (as info 'r0-r1)))
((equal? op "*=") (wrap-as (as info 'r0*r1)))
((equal? op "/=") (wrap-as (as info 'r0/r1 signed?)))
((equal? op "%=") (wrap-as (as info 'r0%r1 signed?)))
((equal? op "&=") (wrap-as (as info 'r0-and-r1)))
((equal? op "|=") (wrap-as (as info 'r0-or-r1)))
((equal? op "^=") (wrap-as (as info 'r0-xor-r1)))
((equal? op ">>=") (wrap-as (as info 'r0>>r1)))
((equal? op "<<=") (wrap-as (as info 'r0<<r1)))
(else (error (format #f "mescc: op ~a not supported: ~a\n" op o))))))
(info (free-register info)))
(cond ((not (and (= rank 1) (= rank-b 1))) info)
((equal? op "-=") (let* ((info (allocate-register info))
(info (append-text info (wrap-as (append (as info 'value->r size)
(as info 'r0/r1 signed?)))))
(info (free-register info)))
info))
(else (error (format #f "invalid operands to binary ~s (have ~s* and ~s*)" op type (ast->basic-type b info)))))))))
(when (and (equal? op "=")
(not (= size size-b))
(not (and (or (= size 1) (= size 2))
(or (= size-b 2) (= size-b 4) (= size-b reg-size))))
(not (and (= size 2)
(= size-b 4)))
(not (and (= size 2)
(= size-b reg-size)))
(not (and (= size reg-size)
(or (= size-b 1) (= size-b 2) (= size-b 4)))))
(stderr "ERROR assign: ~a" (with-output-to-string (lambda () (pretty-print-c99 o))))
(stderr " size[~a]:~a != size[~a]:~a\n" rank size rank-b size-b))
(pmatch a
((p-expr (ident ,name))
(if (or (<= size r-size)
(<= size-b r-size)) (append-text info ((r->ident info) name))
(let* ((info (expr->register* a info))
(info (r0->r1-mem*n info size size-b)))
(free-register info))))
(_ (let* ((info (expr->register* a info))
(reg-size (->size "*" info))
(info (if (not (bit-field? type)) info
(let* ((bit (bit-field:bit type))
(bits (bit-field:bits type))
(set-mask (- (ash bits 1) 1))
(shifted-set-mask (ash set-mask bit))
(clear-mask (logxor shifted-set-mask
(if (= reg-size 4)
#b11111111111111111111111111111111
#b1111111111111111111111111111111111111111111111111111111111111111)))
(info (append-text info (wrap-as (as info 'swap-r0-r1))))
(info (allocate-register info))
(info (append-text info (wrap-as (as info 'r2->r0))))
(info (append-text info (wrap-as (as info 'swap-r0-r1))))
(info (append-text info (wrap-as (as info 'mem->r))))
(info (append-text info (wrap-as (as info 'r-and clear-mask))))
(info (append-text info (wrap-as (as info 'swap-r0-r1))))
(info (append-text info (wrap-as (as info 'r-and set-mask))))
(info (append-text info (wrap-as (as info 'shl-r bit))))
(info (append-text info (wrap-as (as info 'r0-or-r1))))
(info (free-register info))
(info (append-text info (wrap-as (as info 'swap-r0-r1)))))
info)))
(info (r0->r1-mem*n info
(min size (max reg-size size-b))
(min size (max reg-size size-b))))
(info (free-register info)))
info)))))
(_ (error "expr->register: not supported: " o))))
(let ((info (helper)))
(if (null? (.post info)) info
(append-text (clone info #:post '()) (.post info))))))
(define (mem->r type info)
(let* ((size (->size type info))
(reg-size (->size "*" info))
(size (if (= size reg-size) 0 size)))
(case size
((0) (wrap-as (as info 'mem->r)))
((1) (append (wrap-as (as info 'byte-mem->r)) (convert-r0 info type)))
((2) (append (wrap-as (as info 'word-mem->r)) (convert-r0 info type)))
((4) (append (wrap-as (as info 'long-mem->r)) (convert-r0 info type)))
(else '()))))
(define (convert-r0 info type)
(if (not (type? type)) '()
(let ((sign (signed? type))
(size (->size type info))
(reg-size (->size "*" info)))
(cond ((and (= size 1) sign)
(wrap-as (as info 'byte-signed-r)))
((= size 1)
(wrap-as (as info 'byte-r))
;;(wrap-as (as info 'byte-signed-r))
)
((and (= size 2) sign)
(wrap-as (as info 'word-signed-r)))
((= size 2)
(wrap-as (as info 'word-r))
;;(wrap-as (as info 'word-signed-r))
)
((and (> reg-size 4) (= size 4) sign)
(wrap-as (as info 'long-signed-r)))
((and (> reg-size 4) (= size 4))
;; for 17-unsigned-le
(wrap-as (as info 'long-signed-r)) ; huh, why not long-r?
;; for a0-call-trunc-int
;;(wrap-as (as info 'long-r))
)
(else '())))))
(define (binop->r info)
(lambda (a b c . rest)
(let* ((info (expr->register a info))
(info (expr->register b info))
(info (append-text info (wrap-as (apply as info (cons c rest))))))
(free-register info))))
(define (binop->r* info)
(lambda (a b c)
(let* ((info (expr->register* a info))
(info (expr->register b info))
(info (append-text info (wrap-as (as info c)))))
(free-register info))))
(define (wrap-as o . annotation)
`(,@annotation ,o))
(define (comment? o)
(and (pair? o) (pair? (car o)) (eq? (caar o) #:comment)))
(define (test-jump-label->info info label)
(define (jump type . test)
(lambda (o)
(let* ((info (expr->register o info))
(info (append-text info (make-comment "jmp test LABEL")))
(jump-text (wrap-as (as info type label)))
(info (append-text info (append (if (null? test) '() ((car test) info))
jump-text)))
(info (free-register info)))
info)))
(lambda (o)
(pmatch o
((expr) info)
((le ,a ,b) ((jump 'jump-z) o))
((lt ,a ,b) ((jump 'jump-z) o))
((ge ,a ,b) ((jump 'jump-z) o))
((gt ,a ,b) ((jump 'jump-z) o))
((ne ,a ,b) ((jump 'jump-nz) o))
((eq ,a ,b) ((jump 'jump-nz) o))
((not _) ((jump 'jump-z) o))
((and ,a ,b)
(let* ((info ((test-jump-label->info info label) a))
(info ((test-jump-label->info info label) b)))
info))
((or ,a ,b)
(let* ((here (number->string (length (if mes? (.text info)
(filter (negate comment?) (.text info))))))
(skip-b-label (string-append label "_skip_b_" here))
(b-label (string-append label "_b_" here))
(info ((test-jump-label->info info b-label) a))
(info (append-text info (wrap-as (as info 'jump skip-b-label))))
(info (append-text info (wrap-as `((#:label ,b-label)))))
(info ((test-jump-label->info info label) b))
(info (append-text info (wrap-as `((#:label ,skip-b-label))))))
info))
((array-ref ,index ,expr) (let* ((rank (expr->rank info expr))
(reg-size (->size "*" info))
(size (if (= rank 1) (ast-type->size info expr)
reg-size)))
((jump (if (= size 1) 'jump-byte-z
'jump-z)
(lambda (info) (wrap-as (as info 'r-zero?)))) o)))
((de-ref ,expr) (let* ((rank (expr->rank info expr))
(r-size (->size "*" info))
(size (if (= rank 1) (ast-type->size info expr)
r-size)))
((jump (if (= size 1) 'jump-byte-z
'jump-z)
(lambda (info) (wrap-as (as info 'r-zero?)))) o)))
((assn-expr (p-expr (ident ,name)) ,op ,expr)
((jump 'jump-z
(lambda (info)
(append ((ident->r info) name)
(wrap-as (as info 'r-zero?))))) o))
(_ ((jump 'jump-z (lambda (info) (wrap-as (as info 'r-zero?)))) o)))))
(define (cstring->int o)
(let ((o (cond ((string-suffix? "ULL" o) (string-drop-right o 3))
((string-suffix? "UL" o) (string-drop-right o 2))
((string-suffix? "U" o) (string-drop-right o 1))
((string-suffix? "LL" o) (string-drop-right o 2))
((string-suffix? "L" o) (string-drop-right o 1))
(else o))))
(or (cond ((string-prefix? "0x" o) (string->number (string-drop o 2) 16))
((string-prefix? "0b" o) (string->number (string-drop o 2) 2))
((string-prefix? "0" o) (string->number o 8))
(else (string->number o)))
(error "cstring->int: not supported:" o))))
(define (cstring->float o)
(or (string->number o)
(error "cstring->float: not supported:" o)))
(define (try-expr->number info o)
(pmatch o
((fixed ,a) (cstring->int a))
((p-expr ,expr) (expr->number info expr))
((pos ,a)
(expr->number info a))
((neg ,a)
(- (expr->number info a)))
((add ,a ,b)
(+ (expr->number info a) (expr->number info b)))
((bitwise-and ,a ,b)
(logand (expr->number info a) (expr->number info b)))
((bitwise-not ,a)
(lognot (expr->number info a)))
((bitwise-or ,a ,b)
(logior (expr->number info a) (expr->number info b)))
((div ,a ,b)
(quotient (expr->number info a) (expr->number info b)))
((mul ,a ,b)
(* (expr->number info a) (expr->number info b)))
((sub ,a ,b)
(- (expr->number info a) (expr->number info b)))
((sizeof-type ,type)
(->size (ast->type type info) info))
((sizeof-expr ,expr)
(->size (ast->type expr info) info))
((lshift ,x ,y)
(ash (expr->number info x) (expr->number info y)))
((rshift ,x ,y)
(ash (expr->number info x) (- (expr->number info y))))
((p-expr (ident ,name))
(let ((value (assoc-ref (.constants info) name)))
(or value
(error (format #f "expr->number: undeclared identifier: ~s\n" o)))))
((cast ,type ,expr) (expr->number info expr))
((cond-expr ,test ,then ,else)
(if (p-expr->bool info test) (expr->number info then) (expr->number info else)))
(,string (guard (string? string)) (cstring->int string))
((ident ,name) (assoc-ref (.constants info) name))
(_ #f)))
(define (expr->number info o)
(or (try-expr->number info o)
(error (format #f "expr->number: not supported: ~s\n" o))))
(define (p-expr->bool info o)
(pmatch o
((eq ,a ,b) (eq? (expr->number info a) (expr->number info b)))))
(define (struct-field info)
(lambda (o)
(pmatch o
((comp-decl (decl-spec-list (type-spec (enum-def (ident ,name) (enum-def-list . ,fields)))) (comp-declr-list . ,decls))
(append-map (lambda (o)
((struct-field info) `(comp-decl (decl-spec-list (type-spec "int")) (comp-declr-list ,o))))
decls))
((comp-decl (decl-spec-list (type-spec ,type)) (comp-declr-list (comp-declr (ident ,name))))
(list (cons name (ast->type type info))))
((comp-decl (decl-spec-list (type-spec ,type)) (comp-declr-list (comp-declr (ptr-declr ,pointer (ident ,name)))))
(let ((rank (pointer->rank pointer)))
(list (cons name (rank+= (ast->type type info) rank)))))
((comp-decl (decl-spec-list (type-spec ,type)) (comp-declr-list (comp-declr (ftn-declr (scope (ptr-declr ,pointer (ident ,name))) _))))
(let ((rank (pointer->rank pointer)))
(list (cons name (rank+= (ast->type type info) rank)))))
((comp-decl (decl-spec-list (type-spec ,type)) (comp-declr-list (comp-declr (ptr-declr ,pointer (array-of (ident ,name) ,count)))))
(let ((rank (pointer->rank pointer))
(count (expr->number info count)))
(list (cons name (make-c-array (rank+= type rank) count)))))
((comp-decl (decl-spec-list (type-spec ,type)) (comp-declr-list (comp-declr (array-of (ident ,name) ,count))))
(let ((count (expr->number info count)))
(list (cons name (make-c-array (ast->type type info) count)))))
((comp-decl (decl-spec-list (type-spec (struct-def (field-list . ,fields)))))
(let ((fields (append-map (struct-field info) fields)))
(list (cons 'struct (make-type 'struct (apply + (map (cut field:size <> info) fields)) fields)))))
((comp-decl (decl-spec-list (type-spec (union-def (field-list . ,fields)))))
(let ((fields (append-map (struct-field info) fields)))
(list (cons 'union (make-type 'union (apply + (map (cut field:size <> info) fields)) fields)))))
((comp-decl (decl-spec-list (type-spec ,type)) (comp-declr-list (comp-declr (bit-field (ident ,name) (p-expr (fixed ,bits)))) . ,fields))
(let ((type (ast->type type info)))
(list (cons 'bits (let loop ((o `((comp-declr (bit-field (ident ,name) (p-expr (fixed ,bits)))) . ,fields)) (bit 0))
(if (null? o) '()
(let ((field (car o)))
(pmatch field
((comp-declr (bit-field (ident ,name) (p-expr (fixed ,bits))))
(let ((bits (cstring->int bits)))
(cons (cons name (make-bit-field type bit bits))
(loop (cdr o) (+ bit bits)))))
(_ (error "struct-field: not supported:" field o))))))))))
((comp-decl (decl-spec-list ,type) (comp-declr-list . ,decls))
(append-map (lambda (o)
((struct-field info) `(comp-decl (decl-spec-list ,type) (comp-declr-list ,o))))
decls))
(_ (error "struct-field: not supported: " o)))))
(define (local-var? o) ;; formals < 0, locals > 0
(positive? (local:id o)))
(define (ptr-declr->rank o)
(pmatch o
((pointer) 1)
((pointer (pointer)) 2)
((pointer (pointer (pointer))) 3)
(_ (error "ptr-declr->rank not supported: " o))))
(define (ast->info o info)
(let ((functions (.functions info))
(globals (.globals info))
(locals (.locals info))
(constants (.constants info))
(types (.types info))
(text (.text info)))
(pmatch o
(((trans-unit . _) . _) (ast-list->info o info))
((trans-unit . ,_) (ast-list->info _ info))
((fctn-defn . ,_) (fctn-defn->info _ info))
((cpp-stmt (define (name ,name) (repl ,value)))
info)
((cast (type-name (decl-spec-list (type-spec (void)))) _)
info)
((break)
(let ((label (car (.break info))))
(append-text info (wrap-as (as info 'jump label)))))
((continue)
(let ((label (car (.continue info))))
(append-text info (wrap-as (as info 'jump label)))))
;; FIXME: expr-stmt wrapper?
(trans-unit info)
((expr-stmt) info)
((compd-stmt (block-item-list . ,_))
(let* ((locals (.locals info))
(info (ast-list->info _ info)))
(clone info #:locals locals)))
((asm-expr ,gnuc (,null ,arg0 . string))
(append-text info (wrap-as (asm->m1 arg0))))
((expr-stmt (fctn-call (p-expr (ident ,name)) (expr-list . ,expr-list)))
(if (equal? name "asm") (let ((arg0 (cadr (cadar expr-list))))
(append-text info (wrap-as (asm->m1 arg0))))
(let* ((info (expr->register `(fctn-call (p-expr (ident ,name)) (expr-list . ,expr-list)) info))
(info (free-register info))
(info (append-text info (wrap-as (as info 'r-zero?)))))
info)))
((if ,test ,then)
(let* ((info (append-text info (ast->comment `(if ,test (ellipsis)))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(break-label (string-append label "break"))
(else-label (string-append label "else"))
(info ((test-jump-label->info info break-label) test))
(info (ast->info then info))
(info (append-text info (wrap-as (as info 'jump break-label))))
(info (append-text info (wrap-as `((#:label ,break-label))))))
(clone info
#:locals locals)))
((if ,test ,then ,else)
(let* ((info (append-text info (ast->comment `(if ,test (ellipsis) (ellipsis)))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(break-label (string-append label "break"))
(else-label (string-append label "else"))
(info ((test-jump-label->info info else-label) test))
(info (ast->info then info))
(info (append-text info (wrap-as (as info 'jump break-label))))
(info (append-text info (wrap-as `((#:label ,else-label)))))
(info (ast->info else info))
(info (append-text info (wrap-as `((#:label ,break-label))))))
(clone info
#:locals locals)))
;; Hmm?
((expr-stmt (cond-expr ,test ,then ,else))
(let ((info (expr->register `(cond-expr ,test ,then ,else) info)))
(free-register info)))
((switch ,expr (compd-stmt (block-item-list . ,statements)))
(define (clause? o)
(pmatch o
((case . _) 'case)
((default . _) 'default)
((labeled-stmt _ ,statement) (clause? statement))
(_ #f)))
(define clause-number
(let ((i 0))
(lambda (o)
(let ((n i))
(when (clause? (car o))
(set! i (1+ i)))
n))))
(let* ((info (append-text info (ast->comment `(switch ,expr (compd-stmt (block-item-list (ellipsis)))))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(break-label (string-append label "break"))
(info (expr->register expr info))
(info (clone info #:break (cons break-label (.break info))))
(count (length (filter clause? statements)))
(default? (find (cut eq? <> 'default) (map clause? statements)))
(info (fold (cut switch->info #t label (1- count) <> <> <>) info statements
(unfold null? clause-number cdr statements)))
(last-clause-label (string-append label "clause" (number->string count)))
(default-label (string-append label "default"))
(info (if (not default?) info
(append-text info (wrap-as (as info 'jump break-label)))))
(info (append-text info (wrap-as `((#:label ,last-clause-label)))))
(info (if (not default?) info
(append-text info (wrap-as (as info 'jump default-label)))))
(info (append-text info (wrap-as `((#:label ,break-label))))))
(clone info
#:locals locals
#:break (cdr (.break info)))))
((for ,init ,test ,step ,body)
(let* ((info (append-text info (ast->comment `(for ,init ,test ,step (ellipsis)))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(break-label (string-append label "break"))
(loop-label (string-append label "loop"))
(continue-label (string-append label "continue"))
(initial-skip-label (string-append label "initial_skip"))
(info (ast->info init info))
(info (clone info #:break (cons break-label (.break info))))
(info (clone info #:continue (cons continue-label (.continue info))))
(info (append-text info (wrap-as (as info 'jump initial-skip-label))))
(info (append-text info (wrap-as `((#:label ,loop-label)))))
(info (ast->info body info))
(info (append-text info (wrap-as `((#:label ,continue-label)))))
(info (if (equal? step '(expr)) info
(let ((info (expr->register step info)))
(free-register info))))
(info (append-text info (wrap-as `((#:label ,initial-skip-label)))))
(info ((test-jump-label->info info break-label) test))
(info (append-text info (wrap-as (as info 'jump loop-label))))
(info (append-text info (wrap-as `((#:label ,break-label))))))
(clone info
#:locals locals
#:break (cdr (.break info))
#:continue (cdr (.continue info)))))
((while ,test ,body)
(let* ((info (append-text info (ast->comment `(while ,test (ellipsis)))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(break-label (string-append label "break"))
(loop-label (string-append label "loop"))
(continue-label (string-append label "continue"))
(info (append-text info (wrap-as (as info 'jump continue-label))))
(info (clone info #:break (cons break-label (.break info))))
(info (clone info #:continue (cons continue-label (.continue info))))
(info (append-text info (wrap-as `((#:label ,loop-label)))))
(info (ast->info body info))
(info (append-text info (wrap-as `((#:label ,continue-label)))))
(info ((test-jump-label->info info break-label) test))
(info (append-text info (wrap-as (as info 'jump loop-label))))
(info (append-text info (wrap-as `((#:label ,break-label))))))
(clone info
#:locals locals
#:break (cdr (.break info))
#:continue (cdr (.continue info)))))
((do-while ,body ,test)
(let* ((info (append-text info (ast->comment `(do-while ,test (ellipsis)))))
(here (number->string (length text)))
(label (string-append "_" (.function info) "_" here "_"))
(break-label (string-append label "break"))
(loop-label (string-append label "loop"))
(continue-label (string-append label "continue"))
(info (clone info #:break (cons break-label (.break info))))
(info (clone info #:continue (cons continue-label (.continue info))))
(info (append-text info (wrap-as `((#:label ,loop-label)))))
(info (ast->info body info))
(info (append-text info (wrap-as `((#:label ,continue-label)))))
(info ((test-jump-label->info info break-label) test))
(info (append-text info (wrap-as (as info 'jump loop-label))))
(info (append-text info (wrap-as `((#:label ,break-label))))))
(clone info
#:locals locals
#:break (cdr (.break info))
#:continue (cdr (.continue info)))))
((labeled-stmt (ident ,label) ,statement)
(let ((info (append-text info `(((#:label ,(string-append "_" (.function info) "_label_" label)))))))
(ast->info statement info)))
((goto (ident ,label))
(append-text info (wrap-as (as info 'jump (string-append "_" (.function info) "_label_" label)))))
((return (expr))
(let ((info (fold (lambda (x info) (free-register info)) info (.allocated info))))
(append-text info (append (wrap-as (as info 'ret))))))
((return ,expr)
(let* ((info (fold (lambda (x info) (free-register info)) info (.allocated info)))
(info (expr->register expr info))
(info (free-register info)))
(append-text info (append (wrap-as (as info 'ret))))))
((decl . ,decl)
(let ((info (append-text info (ast->comment o))))
(decl->info info decl)))
((gt . _) (free-register (expr->register o info)))
((ge . _) (free-register (expr->register o info)))
((ne . _) (free-register (expr->register o info)))
((eq . _) (free-register (expr->register o info)))
((le . _) (free-register (expr->register o info)))
((lt . _) (free-register (expr->register o info)))
((lshift . _) (free-register (expr->register o info)))
((rshift . _) (free-register (expr->register o info)))
((expr-stmt ,expression)
(let* ((info (expr->register expression info))
(info (append-text info (wrap-as (as info 'r-zero?)))))
(fold (lambda (x info) (free-register info)) info (.allocated info))))
(_ (let* ((info (expr->register o info))
(info (append-text info (wrap-as (as info 'r-zero?)))))
(fold (lambda (x info) (free-register info)) info (.allocated info)))))))
(define (ast-list->info o info)
(fold ast->info info o))
(define (switch->info clause? label count o i info)
(let* ((i-string (number->string i))
(i+1-string (number->string (1+ i)))
(body-label (string-append label "body" i-string))
(next-body-label (string-append label "body" i+1-string))
(clause-label (string-append label "clause" i-string))
(last? (= i count))
(break-label (string-append label "break"))
(next-clause-label (string-append label "clause" i+1-string))
(default-label (string-append label "default")))
(define (jump label)
(wrap-as (as info 'jump label)))
(pmatch o
((case ,test)
(define (jump-nz label)
(wrap-as (as info 'jump-nz label)))
(define (jump-z label)
(wrap-as (as info 'jump-z label)))
(define (test->text test)
(let ((value (pmatch test
(0 0)
((p-expr (char ,value)) (char->integer (car (string->list value))))
((p-expr (ident ,constant)) (assoc-ref (.constants info) constant))
((p-expr (fixed ,value)) (cstring->int value))
((neg (p-expr (fixed ,value))) (- (cstring->int value)))
(_ (error "case test: not supported: " test)))))
(append (wrap-as (as info 'r-cmp-value value))
(jump-z body-label))))
(let ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info)))
(append-text info (test->text test))))
((case ,test (case . ,case1))
(let ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info)))
(fold (cut switch->info #f label count <> i <>) info (cons `(case ,test) `((case ,@case1))))))
((case ,test (default . ,rest))
(let ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info)))
(fold (cut switch->info #f label count <> i <>) info (cons `(case ,test) `(default ,@rest)))))
((case ,test ,statement)
(let* ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info))
(info (switch->info #f label count `(case ,test) i info))
(info (append-text info (jump next-clause-label)))
(info (append-text info (wrap-as `((#:label ,body-label)))))
(info (ast->info statement info))
;; 66-local-char-array -- fallthrough FIXME
;; (info (if last? info
;; (append-text info (jump next-body-label))))
)
info))
((case ,test (case . ,case1) . ,rest)
(let ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info)))
(fold (cut switch->info #f label count <> i <>) info (cons `(case ,test) `((case ,@case1) ,@rest)))))
((default (case . ,case1) . ,rest)
(let* ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info))
(info (if last? info
(append-text info (jump next-clause-label))))
(info (append-text info (wrap-as `((#:label ,default-label)))))
(info (append-text info (jump body-label)))
(info (append-text info (wrap-as `((#:label ,body-label))))))
(fold (cut switch->info #f label count <> i <>) info `((case ,@case1) ,@rest))))
(default
(let* ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info))
(info (if last? info
(append-text info (jump next-clause-label))))
(info (append-text info (wrap-as `((#:label ,default-label)))))
(info (append-text info (jump body-label)))
(info (append-text info (wrap-as `((#:label ,body-label))))))
info))
((default ,statement)
(let* ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info))
(info (if last? info
(append-text info (jump next-clause-label))))
(info (append-text info (wrap-as `((#:label ,default-label)))))
(info (append-text info (wrap-as `((#:label ,body-label))))))
(ast->info statement info)))
((default ,statement ,rest)
(let* ((info (if clause? (append-text info (wrap-as `((#:label ,clause-label))))
info))
(info (if last? info
(append-text info (jump next-clause-label))))
(info (append-text info (wrap-as `((#:label ,default-label)))))
(info (append-text info (wrap-as `((#:label ,body-label))))))
(fold ast->info (ast->info statement info) rest)))
((labeled-stmt (ident ,goto-label) ,statement)
(let ((info (append-text info `(((#:label ,(string-append "_" (.function info) "_label_" goto-label)))))))
(switch->info clause? label count statement i info)))
(_ (ast->info o info)))))
(define (global->static function)
(lambda (o)
(cons (car o) (set-field (cdr o) (global:function) function))))
(define (decl->info info o)
(pmatch o
(((decl-spec-list (type-spec ,type)) (init-declr-list . ,inits))
(let* ((info (type->info type #f info))
(type (ast->type type info)))
(fold (cut init-declr->info type <> <>) info (map cdr inits))))
(((decl-spec-list (type-spec ,type)))
(type->info type #f info))
(((decl-spec-list (stor-spec (typedef)) (type-spec ,type)) (init-declr-list (init-declr (ident ,name))))
(let* ((info (type->info type name info))
(type (ast->type type info)))
(clone info #:types (acons name type (.types info)))))
;; FIXME: recursive types, pointer, array
(((decl-spec-list (stor-spec (typedef)) (type-spec ,type)) (init-declr-list (init-declr (array-of (ident ,name) ,count))))
(let* ((info (type->info type name info))
(type (ast->type type info))
(count (expr->number info count))
(type (make-c-array type count)))
(clone info #:types (acons name type (.types info)))))
(((decl-spec-list (stor-spec (typedef)) (type-spec ,type)) (init-declr-list (init-declr (ptr-declr ,pointer (ident ,name)))))
(let* ((info (type->info type name info))
(type (ast->type type info))
(rank (pointer->rank pointer))
(type (rank+= type rank)))
(clone info #:types (acons name type (.types info)))))
(((decl-spec-list (stor-spec (,store)) (type-spec ,type)) (init-declr-list . ,inits))
(let* ((info (type->info type #f info))
(type (ast->type type info))
(function (.function info)))
(if (not function) (fold (cut init-declr->info type <> <>) info (map cdr inits))
(let* ((tmp (clone info #:function #f #:globals '()))
(tmp (fold (cut init-declr->info type <> <>) tmp (map cdr inits)))
(statics (map (global->static function) (.globals tmp)))
(strings (filter string-global? (.globals tmp))))
(clone info #:globals (append (.globals info) strings)
#:statics (append statics (.statics info)))))))
(((decl-spec-list (stor-spec (,store)) (type-spec ,type)))
(type->info type #f info))
(((@ . _))
(stderr "decl->info: skip: ~s\n" o)
info)
(_ (error "decl->info: not supported:" o))))
(define (ast->name o)
(pmatch o
((ident ,name) name)
((array-of ,array . ,_) (ast->name array))
((ftn-declr (scope (ptr-declr ,pointer (ident ,name))) . _) name)
((ptr-declr ,pointer ,decl . ,_) (ast->name decl))
((ptr-declr ,pointer (ident ,name)) name)
(_ (error "ast->name not supported: " o))))
(define (init-declr->count info o)
(pmatch o
((array-of (ident ,name) ,count) (expr->number info count))
(_ #f)))
(define (init->r o info)
(pmatch o
((initzer-list (initzer ,expr))
(expr->register expr info))
(((#:string ,string))
(expr->register `(p-expr (string ,string)) info))
((,number . _) (guard (number? number))
(expr->register `(p-expr (fixed 0)) info))
((,c . ,_) (guard (char? c))
info)
(_
(expr->register o info))))
(define (init-struct-field local field n init info)
(let* ((offset (field-offset info (local:type local) (car field)))
(size (field:size field info))
(offset (+ offset (* n size)))
(info (expr->register init info))
(info (allocate-register info))
(info (append-text info (local->r local info)))
(info (append-text info (wrap-as (as info 'r+value offset))))
(reg-size (->size "*" info))
(size (min size reg-size))
(info (r0->r1-mem*n info size size))
(info (free-register info))
(info (free-register info)))
info))
(define (init-struct-struct-field local type offset field init info)
(let* ((offset (+ offset (field-offset info type (car field))))
(size (field:size field info))
(info (expr->register init info))
(info (allocate-register info))
(info (append-text info (local->r local info)))
(info (append-text info (wrap-as (as info 'r+value offset))))
(reg-size (->size "*" info))
(size (min size reg-size))
(info (r0->r1-mem*n info size size))
(info (free-register info))
(info (free-register info)))
info))
(define (init-array-entry local index init info)
(let* ((type (local:type local))
(size (cond ((pointer? type) (->size "*" info))
((and (c-array? type) ((compose pointer? c-array:type) type)) (->size "*" info))
((c-array? type) ((compose type:size c-array:type) type))
(else (type:size type))))
(offset (* index size))
(info (expr->register init info))
(info (allocate-register info))
(info (append-text info (local->r local info)))
(info (append-text info (wrap-as (as info 'r+value offset))))
(reg-size (->size "*" info))
(size (min size reg-size))
(info (r0->r1-mem*n info size size))
(info (fold (lambda (x info) (free-register info)) info (.allocated info))))
info))
(define (init-local local o n info)
(pmatch o
(#f info)
((initzer ,init)
(init-local local init n info))
((initzer-list . ,inits)
(let ((local-type (local:type local)))
(cond ((structured-type? local)
(let* ((fields (struct->init-fields local-type))
(field+counts (let loop ((fields fields))
(if (null? fields) '()
(let* ((field (car fields))
(type (cdr field)))
(cond ((c-array? type)
(append (map
(lambda (i)
(let ((field (cons (car field) (c-array:type type))))
(cons field i)))
(iota (c-array:count type)))
(loop (cdr fields))))
(else
(cons (cons field 0) (loop (cdr fields))))))))))
(let loop ((field+counts field+counts) (inits inits) (info info))
(if (null? field+counts) info
(let* ((field (caaar field+counts))
(type (cdaar field+counts)))
(if (and (type? type)
(eq? (type:type type) 'struct))
(let* ((field-fields (type:description type))
(field-inits (list-head inits (max (length inits) (length field-fields))))
(missing (max 0 (- (length field-fields) (length field-inits))))
(field-inits+ (append field-inits (map (const '(p-expr (fixed "0"))) (iota missing))))
(offset (field-offset info local-type field))
;; (info (init-local local `(initzer-list ,field-inits) n info))
;; crap, howto recurse? -- would need new local for TYPE
;; just do two deep for now
(info (fold (cut init-struct-struct-field local type offset <> <> <>) info field-fields field-inits+)))
(loop (list-tail field+counts (min (length field+counts) (length field-fields)))
(list-tail inits (min (length field-inits) (length field-inits))) info))
(let* ((missing (max 0 (- (length field+counts) (length inits))))
(counts (map cdr field+counts))
(fields (map car field+counts))
(info (fold (cut init-struct-field local <> <> <> <>) info fields counts (append inits (map (const '(p-expr (fixed "22"))) (iota missing))))))
;; bah, loopme!
;;(loop (list-tail field+counts (length field-fields)) (list-tail inits (length field-inits)) info)
info)))))))
(else
(let* ((type (local:type local))
(type (if (c-array? type) (c-array:type type) type))
(size (->size type info)))
(fold (cut init-local local <> <> <>) info inits (iota (length inits) 0 size)))))))
(,string (guard (string? string))
(let ((inits (string->list string)))
(fold (cut init-array-entry local <> <> <>) info (iota (length inits)) inits)))
(((initzer (initzer-list . ,inits)))
(init-local local (car o) n info))
(() info)
(_ (let* ((info (init->r o info))
(info (append-text info (r->local+n-text info local n))))
(free-register info)))))
(define (local->info type name o init info)
(let* ((locals (.locals info))
(id (if (or (null? locals) (not (local-var? (cdar locals)))) 1
(1+ (local:id (cdar locals)))))
(local (make-local-entry name type id))
(pointer (->rank (cdr local)))
(array? (or (and (c-array? type) type)
(and (pointer? type)
(c-array? (pointer:type type))
(pointer:type type))
(and (pointer? type)
(pointer? (pointer:type type))
(c-array? (pointer:type (pointer:type type)))
(pointer:type (pointer:type type)))))
(struct? (structured-type? type))
(size (->size type info))
(string (and array? (array-init->string init)))
(init (or string init))
(reg-size (->size "*" info))
(local (if (not array?) local
(let ((size (or (and string (max size (1+ (string-length string))))
size)))
(make-local-entry name type (+ (local:id (cdr local)) -1 (quotient (+ size (1- reg-size)) reg-size))))))
(local (if struct? (make-local-entry name type (+ (local:id (cdr local)) (quotient (+ size (1- reg-size)) reg-size)))
local))
(locals (cons local locals))
(info (clone info #:locals locals))
(local (cdr local)))
(init-local local init 0 info)))
(define (global->info type name o init info)
(let* ((rank (->rank type))
(size (->size type info))
(data (cond ((not init) (string->list (make-string size #\nul)))
((c-array? type)
(let* ((string (array-init->string init))
(size (or (and string (max size (1+ (string-length string))))
size))
(data (or (and=> string string->list)
(array-init->data type size init info))))
(append data (string->list (make-string (max 0 (- size (length data))) #\nul)))))
((structured-type? type)
(let ((data (init->data type init info)))
(append data (string->list (make-string (max 0 (- size (length data))) #\nul)))))
(else
(let ((data (init->data type init info)))
(append data (string->list (make-string (max 0 (- size (length data))) #\nul)))))))
(global (make-global-entry name type data)))
(clone info #:globals (append (.globals info) (list global)))))
(define (array-init-element->data type o info)
(pmatch o
((initzer (p-expr (string ,string)))
(let ((reg-size (->size "*" info)))
(if (= reg-size 8) `((#:string ,string) "%0")
`((#:string ,string)))))
((initzer (p-expr (fixed ,fixed)))
(if (structured-type? type)
(let ((fields (map cdr (struct->init-fields type))))
(int->bv type (expr->number info fixed) info))
(int->bv type (expr->number info fixed) info)))
((initzer (initzer-list . ,inits))
(cond ((structured-type? type)
(let* ((fields (map cdr (struct->init-fields type)))
(missing (max 0 (- (length fields) (length inits))))
(inits (append inits
(map (const '(fixed "0")) (iota missing)))))
(map (cut array-init-element->data <> <> info) fields inits)))
((c-array? type)
(let* ((missing (max 0 (- (c-array:count type) (length inits))))
(inits (append inits
(map (const '(fixed "0")) (iota missing)))))
(map (cut array-init-element->data (c-array:type type) <> info) inits)))
(else
(stderr "array-init-element->data: oops:~s\n" o)
(stderr "type:~s\n" type)
(error "array-init-element->data: not supported: " o))))
(_ (init->data type o info))
(_ (error "array-init-element->data: not supported: " o))))
(define (array-init->data type size o info)
(pmatch o
((initzer (initzer-list . ,inits))
(let ((type (c-array:type type)))
(if (structured-type? type)
(let* ((init-fields (struct->init-fields type)) ;; FIXME
(count (length init-fields)))
(let loop ((inits inits))
(if (null? inits) '()
(let ((init (car inits)))
(pmatch init
((initzer (initzer-list . ,car-inits))
(append (array-init-element->data type init info)
(loop (cdr inits))))
(_
(let* ((count (min (length inits) (length init-fields)))
(field-inits (list-head inits count)))
(append (array-init-element->data type `(initzer-list ,@field-inits) info)
(loop (list-tail inits count))))))))))
(map (cut array-init-element->data type <> info) inits))))
(((initzer (initzer-list . ,inits)))
(array-init->data type size (car o) info))
((initzer (p-expr (string ,string)))
(let ((data (string->list string)))
(if (not size) data
(append data (string->list (make-string (max 0 (- size (length data))) #\nul))))))
(((initzer (p-expr (string ,string))))
(array-init->data type size (car o) info))
((initzer (p-expr (string . ,strings)))
(let ((data (string->list (apply string-append strings))))
(if (not size) data
(append data (string->list (make-string (max 0 (- size (length data))) #\nul))))))
(((initzer (p-expr (string . ,strings))))
(array-init->data type size (car o) info))
((initzer (p-expr (fixed ,fixed)))
(int->bv type (expr->number info fixed) info))
(() (string->list (make-string size #\nul)))
(_ (error "array-init->data: not supported: " o))))
(define (array-init->string o)
(pmatch o
((p-expr (string ,string)) string)
((p-expr (string . ,strings)) (apply string-append strings))
((initzer ,init) (array-init->string init))
(((initzer ,init)) (array-init->string init))
((initzer-list (initzer (p-expr (char ,c))) . ,inits)
(list->string (map (lambda (i) (pmatch i
((initzer (p-expr (char ,c))) ((compose car string->list) c))
((initzer (p-expr (fixed ,fixed)))
(let ((value (cstring->int fixed)))
(if (and (>= value 0) (<= value 255))
(integer->char value)
(error "array-init->string: not supported:" i o))))
(_ (error "array-init->string: not supported:" i o))))
(cdr o))))
(_ #f)))
(define (init-declr->info type o info)
(pmatch o
(((ident ,name))
(if (.function info) (local->info type name o #f info)
(global->info type name o #f info)))
(((ident ,name) (initzer ,init))
(let* ((strings (init->strings init info))
(info (if (null? strings) info
(clone info #:globals (append (.globals info) strings)))))
(if (.function info) (local->info type name o init info)
(global->info type name o init info))))
(((ftn-declr (ident ,name) . ,_))
(let ((functions (.functions info)))
(if (member name functions) info
(let* ((type (ftn-declr:get-type info `(ftn-declr (ident ,name) ,@_)))
(function (make-function name type #f)))
(clone info #:functions (cons (cons name function) functions))))))
(((ftn-declr (scope (ptr-declr ,pointer (ident ,name))) ,param-list) ,init)
(let* ((rank (pointer->rank pointer))
(type (rank+= type rank)))
(if (.function info) (local->info type name o init info)
(global->info type name o init info))))
(((ftn-declr (scope (ptr-declr ,pointer (ident ,name))) ,param-list))
(let* ((rank (pointer->rank pointer))
(type (rank+= type rank)))
(if (.function info) (local->info type name o '() info)
(global->info type name o '() info))))
(((ptr-declr ,pointer . ,_) . ,init)
(let* ((rank (pointer->rank pointer))
(type (rank+= type rank)))
(init-declr->info type (append _ init) info)))
(((array-of (ident ,name) ,count) . ,init)
(let* ((strings (init->strings init info))
(info (if (null? strings) info
(clone info #:globals (append (.globals info) strings))))
(count (expr->number info count))
(type (make-c-array type count)))
(if (.function info) (local->info type name o init info)
(global->info type name o init info))))
(((array-of (ident ,name)) . ,init)
(let* ((strings (init->strings init info))
(info (if (null? strings) info
(clone info #:globals (append (.globals info) strings))))
(count (length (cadar init)))
(type (make-c-array type count)))
(if (.function info) (local->info type name o init info)
(global->info type name o init info))))
;; FIXME: recursion
(((array-of (array-of (ident ,name) ,count1) ,count) . ,init)
(let* ((strings (init->strings init info))
(info (if (null? strings) info
(clone info #:globals (append (.globals info) strings))))
(count (expr->number info count))
(count1 (expr->number info count1))
(type (make-c-array (make-c-array type count1) count)))
(if (.function info) (local->info type name o init info)
(global->info type name o init info))))
(_ (error "init-declr->info: not supported: " o))))
(define (enum-def-list->constants constants fields)
(let loop ((fields fields) (i 0) (constants constants))
(if (pair? fields)
(let ((field (car fields)))
(mescc:trace (cadr (cadr field)) " <e>")))
(if (null? fields) constants
(let* ((field (car fields))
(name (pmatch field
((enum-defn (ident ,name) . _) name)))
(i (pmatch field
((enum-defn ,name) i)
((enum-defn ,name ,exp) (expr->number #f exp))
(_ (error "not supported enum field=~s\n" field)))))
(loop (cdr fields)
(1+ i)
(append constants (list (ident->constant name i))))))))
(define (init->data type o info)
(pmatch o
((p-expr ,expr) (init->data type expr info))
((fixed ,fixed) (int->bv type (expr->number info o) info))
((char ,char) (int->bv type (char->integer (string-ref char 0)) info))
((string ,string)
(let ((reg-size (->size "*" info)))
(if (= reg-size 8) `((#:string ,string) "%0")
`((#:string ,string)))))
((string . ,strings)
(let ((reg-size (->size "*" info)))
(if (= reg-size 8) `((#:string ,(string-join strings "")) "%0")
`((#:string ,(string-join strings ""))))))
((ident ,name) (let ((var (ident->variable info name)))
(if (number? var) (int->bv type var info)
`((#:address ,var)))))
((initzer-list . ,inits)
(cond ((structured-type? type)
(map (cut init->data <> <> info) (map cdr (struct->init-fields type)) inits))
((c-array? type)
(let ((size (->size type info)))
(array-init->data type size `(initzer ,o) info)))
(else
(append-map (cut init->data type <> info) inits))))
(((initzer (initzer-list . ,inits)))
(init->data type `(initzer-list . ,inits) info))
((ref-to (p-expr (ident ,name)))
(let ((var (ident->variable info name))
(reg-size (->size "*" info)))
`((#:address ,var)
,@(if (= reg-size 8) '((#:address 0))
'()))))
((ref-to (i-sel (ident ,field) (cast (type-name (decl-spec-list ,struct) (abs-declr (pointer))) (p-expr (fixed ,base)))))
(let* ((type (ast->type struct info))
(offset (field-offset info type field))
(base (cstring->int base)))
(int->bv type (+ base offset) info)))
((,char . _) (guard (char? char)) o)
((,number . _) (guard (number? number))
(append (map (cut int->bv <> <> info) type o)))
((initzer ,init) (init->data type init info))
(((initzer ,init)) (init->data type init info))
((cast _ ,expr) (init->data type expr info))
(() '())
(_ (let ((number (try-expr->number info o)))
(cond (number (int->bv type number info))
(else (error "init->data: not supported: " o)))))))
(define (int->bv type o info)
(let ((size (->size type info)))
(case size
((1) (int->bv8 o))
((2) (int->bv16 o))
((4) (int->bv32 o))
((8) (int->bv64 o))
(else (int->bv64 o)))))
(define (init->strings o info)
(let ((globals (.globals info)))
(pmatch o
((p-expr (string ,string))
(let ((g `(#:string ,string)))
(if (assoc g globals) '()
(list (string->global-entry string)))))
((p-expr (string . ,strings))
(let* ((string (string-join strings ""))
(g `(#:string ,string)))
(if (assoc g globals) '()
(list (string->global-entry string)))))
(((initzer (initzer-list . ,init)))
(append-map (cut init->strings <> info) init))
((initzer ,init)
(init->strings init info))
(((initzer ,init))
(init->strings init info))
((initzer-list . ,init)
(append-map (cut init->strings <> info) init))
(_ '()))))
(define (type->info o name info)
(pmatch o
((enum-def (ident ,name) (enum-def-list . ,fields))
(mescc:trace name " <t>")
(let* ((type-entry (enum->type-entry name fields))
(constants (enum-def-list->constants (.constants info) fields)))
(clone info
#:types (cons type-entry (.types info))
#:constants (append constants (.constants info)))))
((enum-def (enum-def-list . ,fields))
(mescc:trace name " <t>")
(let* ((type-entry (enum->type-entry name fields))
(constants (enum-def-list->constants (.constants info) fields)))
(clone info
#:types (cons type-entry (.types info))
#:constants (append constants (.constants info)))))
((struct-def (field-list . ,fields))
(mescc:trace name " <t>")
(let* ((info (fold field->info info fields))
(type-entry (struct->type-entry info name (append-map (struct-field info) fields))))
(clone info #:types (cons type-entry (.types info)))))
((struct-def (ident ,name) (field-list . ,fields))
(mescc:trace name " <t>")
(let* ((info (fold field->info info fields))
(type-entry (struct->type-entry info name (append-map (struct-field info) fields))))
(clone info #:types (cons type-entry (.types info)))))
((union-def (ident ,name) (field-list . ,fields))
(mescc:trace name " <t>")
(let ((type-entry (union->type-entry info name (append-map (struct-field info) fields))))
(clone info #:types (cons type-entry (.types info)))))
((union-def (field-list . ,fields))
(mescc:trace name " <t>")
(let ((type-entry (union->type-entry info name (append-map (struct-field info) fields))))
(clone info #:types (cons type-entry (.types info)))))
((enum-ref . _) info)
((struct-ref . _) info)
((typename ,name) info)
((union-ref . _) info)
((fixed-type . _) info)
((float-type . _) info)
((void) info)
(_ ;;(error "type->info: not supported:" o)
info
)))
(define (field->info o info)
(pmatch o
((comp-decl (decl-spec-list (type-spec (struct-def (ident ,name) (field-list . ,fields)))) . _)
(let* ((fields (append-map (struct-field info) fields))
(struct (make-type 'struct (apply + (map (cut field:size <> info) fields)) fields)))
(clone info #:types (acons `(tag ,name) struct (.types info)))))
((comp-decl (decl-spec-list (type-spec (union-def (ident ,name) (field-list . ,fields)))) . _)
(let* ((fields (append-map (struct-field info) fields))
(union (make-type 'union (apply + (map (cut field:size <> info) fields)) fields)))
(clone info #:types (acons `(tag ,name) union (.types info))) ))
((comp-decl (decl-spec-list (type-spec (enum-def (enum-def-list . ,fields)))) . _)
(let ((constants (enum-def-list->constants (.constants info) fields)))
(clone info
#:constants (append constants (.constants info)))))
((comp-decl (decl-spec-list (type-spec (enum-def (ident ,name) (enum-def-list . ,fields)))) . _)
(let ((constants (enum-def-list->constants (.constants info) fields))
(type-entry (enum->type-entry name fields)))
(clone info
#:types (cons type-entry (.types info))
#:constants (append constants (.constants info)))))
(_ info)))
;;; fctn-defn
(define (param-decl:get-name o)
(pmatch o
((ellipsis) #f)
((param-decl (decl-spec-list (type-spec (void)))) #f)
((param-decl _ (param-declr ,ast)) (ast->name ast))
(_ (error "param-decl:get-name not supported:" o))))
(define (fctn-defn:get-name o)
(pmatch o
((_ (ftn-declr (ident ,name) _) _) name)
((_ (ftn-declr (scope (ident ,name)) _) _) name)
((_ (ptr-declr (pointer . _) (ftn-declr (ident ,name) _)) _) name)
(_ (error "fctn-defn:get-name not supported:" o))))
(define (param-decl:get-type o info)
(pmatch o
((ellipsis) #f)
((param-decl (decl-spec-list ,type)) (ast->type type info))
((param-decl (decl-spec-list (type-spec ,type)) (param-declr (ptr-declr ,pointer (ident ,name))))
(let ((rank (pointer->rank pointer)))
(rank+= (ast->type type info) rank)))
((param-decl (decl-spec-list ,type) (param-declr (ptr-declr ,pointer (array-of _))))
(let ((rank (pointer->rank pointer)))
(rank+= (ast->type type info) (1+ rank))))
((param-decl ,type _) (ast->type type info))
(_ (error "param-decl:get-type not supported:" o))))
(define (fctn-defn:get-formals o)
(pmatch o
((_ (ftn-declr _ ,formals) _) formals)
((_ (ptr-declr (pointer . _) (ftn-declr _ ,formals)) _) formals)
(_ (error "fctn-defn->formals: not supported:" o))))
(define (formal->text n)
(lambda (o i)
;;(i386:formal i n)
'()
))
(define (param-list->text o info)
(pmatch o
((param-list . ,formals)
(let ((n (length formals)))
(wrap-as (append (as info 'function-preamble formals)
(append-map (formal->text n) formals (iota n))
(as info 'function-locals)))))
(_ (error "param-list->text: not supported: " o))))
(define (param-list->locals o info)
(pmatch o
((param-list . ,formals)
(let ((n (length formals)))
(map make-local-entry
(map param-decl:get-name formals)
(map (cut param-decl:get-type <> info) formals)
(iota n -2 -1))))
(_ (error "param-list->locals: not supported:" o))))
(define (fctn-defn:get-type info o)
(pmatch o
(((decl-spec-list (type-spec ,type)) (ptr-declr ,pointer . _) ,statement)
(let* ((type (ast->type type info))
(rank (ptr-declr->rank pointer)))
(if (zero? rank) type
(make-pointer type rank))))
(((decl-spec-list (stor-spec ,store) (type-spec ,type)) (ptr-declr ,pointer . _) ,statement)
(let* ((type (ast->type type info))
(rank (ptr-declr->rank pointer)))
(if (zero? rank) type
(make-pointer type rank))))
(((decl-spec-list (type-spec ,type)) . _)
(ast->type type info))
(((decl-spec-list (stor-spec ,store) (type-spec ,type)) . _)
(ast->type type info))
(_ (error "fctn-defn:get-type: not supported:" o))))
(define (ftn-declr:get-type info o)
(pmatch o
((ftn-declr (ident _) . _) #f)
(_ (error "fctn-decrl:get-type: not supported:" o))))
(define (fctn-defn:get-statement o)
(pmatch o
((_ (ftn-declr (ident _) _) ,statement) statement)
((_ (ftn-declr (scope (ident _)) _) ,statement) statement)
((_ (ptr-declr (pointer . _) (ftn-declr (ident _) . _)) ,statement) statement)
(_ (error "fctn-defn:get-statement: not supported: " o))))
(define (fctn-defn->info o info)
(define (assert-return text)
(let ((return (wrap-as (as info 'ret))))
(if (equal? (list-tail text (- (length text) (length return))) return) text
(append text return))))
(let ((name (fctn-defn:get-name o)))
(mescc:trace name)
(let* ((type (fctn-defn:get-type info o))
(formals (fctn-defn:get-formals o))
(text (param-list->text formals info))
(locals (param-list->locals formals info))
(statement (fctn-defn:get-statement o))
(function (cons name (make-function name type '())))
(functions (cons function (.functions info)))
(info (clone info #:locals locals #:function name #:text text #:functions functions #:statics '()))
(info (ast->info statement info))
(locals (.locals info))
(local (and (pair? locals) (car locals)))
(count (and=> local (compose local:id cdr)))
(reg-size (->size "*" info))
(stack (and count (* count reg-size))))
(if (and stack (getenv "MESC_DEBUG")) (stderr " stack: ~a\n" stack))
(clone info
#:function #f
#:globals (append (.statics info) (.globals info))
#:statics '()
#:functions (append (.functions info) (list (cons name (make-function name type (assert-return (.text info))))))))))
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