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Full vector compilation

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This commit is contained in:
Justin Ethier 2015-06-04 21:19:00 -04:00
parent bc01c9dd19
commit 30619d8709
1 changed files with 41 additions and 7 deletions
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48
cgen.scm
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@ -317,13 +317,47 @@
num-args)))
(define (c-compile-vector exp)
;; TODO: this is just a stub, does not allocate vector contents
(let ((cvar-name (mangle (gensym 'c))))
(c-code/vars
(string-append "&" cvar-name) ; Code is just the variable name
(list ; Allocate integer on the C stack
(string-append
"make_empty_vector(" cvar-name ");")))))
(letrec ((cvar-name (mangle (gensym 'vec)))
(len (vector-length exp))
;; Generate code for each member of the vector
(loop
(lambda (i code)
(if (= i len)
code
(let ((idx-code (c-compile-const (vector-ref exp i))))
(loop
(+ i 1)
(c-code/vars
;; The vector's C variable
(c:body code)
;; Allocations
(append
(c:allocs code) ;; Vector alloc
(c:allocs idx-code) ;; Member alloc at index i
(list ;; Assign this member to vector
(string-append
cvar-name ".elts[" (number->string i) "] = "
(c:body idx-code)
";")))))))))
)
(cond
((zero? len)
(c-code/vars
(string-append "&" cvar-name) ; Code is just the variable name
(list ; Allocate empty vector
(string-append
"make_empty_vector(" cvar-name ");"))))
(else
(let ((code
(c-code/vars
(string-append "&" cvar-name) ; Code body is just var name
(list ; Allocate the vector
(string-append
"make_empty_vector(" cvar-name ");"
cvar-name ".num_elt = " (number->string len) ";"
cvar-name ".elts = (object *)alloca(sizeof(object) * "
(number->string len) ");")))))
(loop 0 code))))))
;; c-compile-const : const-exp -> c-pair
;;