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Do not use (string-append) when emitting code

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Justin Ethier 2015-05-21 01:30:54 -04:00
parent 28f7085c37
commit 753c2a9b3b
2 changed files with 25 additions and 31 deletions
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4
TODO
View file

@ -4,10 +4,6 @@ Working TODO list:
- seems to be working! next step is to get parser, eval, and icyc (in that order) to work with libs
- In cgen, start using (emit*) instead of (string-append).
There is no reason to allocate a bunch of strings if they are
just going to be deallocated after printing
- Reduction in size of generated code
is there anything we can do?
are closures being packed/unpacked unnecessarily?

52
cgen.scm
View file

@ -17,6 +17,9 @@
(define (emits str)
(display str))
(define (emits* . strs)
(for-each emits strs))
(define (emit-newline)
(newline))
@ -946,20 +949,19 @@
;; Emit symbols
(for-each
(lambda (sym)
(emit
(string-append
"defsymbol(" (mangle sym) ", " (symbol->string sym) ");")))
(emit*
"defsymbol(" (mangle sym) ", " (symbol->string sym) ");"))
*symbols*)
;; Emit lambdas:
; Print the prototypes:
(for-each
(lambda (l)
(emit (string-append
"static void __lambda_"
(number->string (car l)) "(int argc, "
(cdadr l)
") ;")))
(emit*
"static void __lambda_"
(number->string (car l)) "(int argc, "
(cdadr l)
") ;"))
lambdas)
(emit "")
@ -976,11 +978,11 @@
(emit "static void c_entry_pt_first_lambda();")
(for-each
(lambda (lib-name)
(emit (string-append "extern void c_" (lib:name->string lib-name) "_entry_pt(int argc, closure cont, object value);")))
(emit* "extern void c_" (lib:name->string lib-name) "_entry_pt(int argc, closure cont, object value);"))
required-libs)
(emit "static void c_entry_pt(argc, env,cont) int argc; closure env,cont; { "))
(else
(emit (string-append "void c_" (lib:name->string lib-name) "_entry_pt(argc, cont,value) int argc; closure cont; object value;{ "))
(emit* "void c_" (lib:name->string lib-name) "_entry_pt(argc, cont,value) int argc; closure cont; object value;{ ")
; DEBUG (emit (string-append "printf(\"init " (lib:name->string lib-name) "\\n\");"))
))
@ -996,7 +998,7 @@
;; Initialize symbol table
(for-each
(lambda (sym)
(emit (string-append " add_symbol(quote_" (mangle sym) ");")))
(emit* " add_symbol(quote_" (mangle sym) ");"))
*symbols*)
;; Initialize globals
@ -1021,14 +1023,12 @@
(lambda (g)
(let ((cvar-sym (mangle (gensym 'cvar)))
(pair-sym (mangle (gensym 'pair))))
(emits
(string-append
(emits*
" make_cvar(" cvar-sym
", (object *)&" (mangle-global (car g)) ");"))
(emits
(string-append
", (object *)&" (mangle-global (car g)) ");")
(emits*
"make_cons(" pair-sym ", find_or_add_symbol(\"" (symbol->string (car g))
"\"), &" cvar-sym ");\n"))
"\"), &" cvar-sym ");\n")
(set! pairs (cons pair-sym pairs))
))
*globals*)
@ -1054,32 +1054,30 @@
(cdr ps)
(cdr cs)))))
(if head-pair
(emit
(string-append "Cyc_global_variables = &" head-pair ";"))))
(emit*
"Cyc_global_variables = &" head-pair ";")))
(cond
(program?
;; Emit code to initialize each module (compiled Scheme library)
(let ((this-clo "c_done")
(prev-clo "c_done"))
(emit
(string-append
(emit*
"mclosure1(" this-clo
", c_entry_pt_first_lambda, &" prev-clo ");"))
", c_entry_pt_first_lambda, &" prev-clo ");")
(for-each
(lambda (lib-name)
(set! prev-clo this-clo)
(set! this-clo (mangle (gensym "c")))
(emit
(string-append
(emit*
"mclosure1(" this-clo
", c_" (lib:name->string lib-name) "_entry_pt"
", &" prev-clo ");"))
", &" prev-clo ");")
)
required-libs)
(emit
(emit*
;; Start cont chain, but do not assume funcall1 macro was defined
(string-append "(" this-clo ".fn)(0, &" this-clo ", &" this-clo ");"))
"(" this-clo ".fn)(0, &" this-clo ", &" this-clo ");")
(emit "}")
(emit "static void c_entry_pt_first_lambda(int argc, closure cont, object value) {")
; DEBUG (emit (string-append "printf(\"init first lambda\\n\");"))