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Compiler is coming along. Work on Slot system and general compiler strategy.

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bakpakin 2017-12-16 01:17:53 -05:00
parent 1293d2e301
commit 2d781ef21b
8 changed files with 789 additions and 280 deletions
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@ -0,0 +1,230 @@
/*
* Copyright (c) 2017 Calvin Rose
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef DST_COMPILE_H
#define DST_COMPILE_H
#include <dst/dst.h>
#include <setjmp.h>
/* Compiler typedefs */
typedef struct DstCompiler DstCompiler;
typedef struct FormOptions FormOptions;
typedef struct SlotTracker SlotTracker;
typedef struct DstScope DstScope;
typedef struct DstCFunctionOptimizer DstCFunctionOptimizer;
#define DST_SLOT_CONSTANT 0x10000
#define DST_SLOT_NAMED 0x20000
#define DST_SLOT_RETURNED 0x40000
#define DST_SLOT_NIL 0x80000
#define DST_SLOT_MUTABLE 0x100000
#define DST_SLOTTYPE_ANY 0xFFFF
/* A stack slot */
struct DstSlot {
int32_t index;
int32_t envindex; /* 0 is local, positive number is an upvalue */
uint32_t flags;
DstValue constant; /* If the slot has a constant value */
}
/* Most forms that return a constant will not generate any bytecode */
/* Special forms that need support */
/* cond
* while (continue, break)
* quote
* fn
* def
* var
* varset
* do
*/
#define DST_OPTIMIZER_CONSTANTS 0x10000
#define DST_OPTIMIZER_BYTECODE 0x20000
#define DST_OPTIMIZER_PARTIAL_CONSTANTS 0x40000
#define DST_OPTIMIZER_SYSCALL 0x80000
/* A grouping of optimization on a cfunction given certain conditions
* on the arguments (such as all constants, or some known types). The appropriate
* optimizations should be tried before compiling a normal function call. */
struct DstCFunctionOptimizer {
uint32_t flags; /* Indicate what kind of optimizations can be performed. */
/*Also what kind of types can be returned*/
int32_t syscall;
}
#define DST_SCOPE_FUNCTION 1
#define DST_SCOPE_LASTSLOT 2
#define DST_SCOPE_FIRSTSLOT 4
#define DST_SCOPE_ENV
/* A lexical scope during compilation */
struct DstScope {
DstArray constants; /* Constants for the funcdef */
DstTable symbols; /* Map symbols -> Slot inidices */
/* Hold all slots in use. Data structures that store
* slots should link them to this datatstructure */
DstSlot *slots;
int32_t slotcount;
int32_t slotcap;
/* A vector of freed slots. */
int32_t *freeslots;
int32_t freeslotcount;
int32_t freeslotcap;
int32_t lastslot;
int32_t nextslot;
/* Referenced closure environemts. The values at each index correspond
* to which index to get the environment from in the parent. The enironment
* that corresponds to the direct parent's stack will always have value 0. */
int32_t *envs;
int32_t envcount;
int32_t envcap;
int32_t buffer_offset; /* Where the bytecode for this scope begins */
uint32_t flags;
}
/* Compilation state */
struct DstCompiler {
jump_buf on_error;
int32_t scopecount;
int32_t scopecap;
DstScope *scopes;
DstBuffer buffer;
DstBuffer mapbuffer;
int32_t error_start;
int32_t error_end;
DstValue error;
int recursion_guard;
};
#define DST_FOPTS_TAIL 0x10000
#define DST_FOPTS_FORCESLOT 0x20000
/* Compiler state */
struct DstFormOptions {
DstCompiler *compiler;
DstValue x;
const DstValue *sourcemap;
uint32_t flags; /* bit set of accepted primitive types */
};
typedef enum DstCompileStatus {
DST_COMPILE_OK,
DST_COMPILE_ERROR
} DstCompileStatus;
/* Results of compilation */
typedef struct DstCompileResults {
DstCompileStatus status;
DstFuncDef *funcdef;
const uint8_t *error;
} DstCompileResults;
typedef struct DstCompileOptions {
uint32_t flags;
const DstValue *sourcemap;
DstValue src;
int32_t target;
};
/* Compiler handlers. Used to compile different kinds of expressions. */
typedef DstSlot (*DstFormCompiler)(DstFormOptions opts);
/* Dispatch to correct form compiler */
DstSlot dst_compile_value(DstFormOptions opts);
/* Compile basic types */
DstSlot dst_compile_constant(DstFormOptions opts);
DstSlot dst_compile_symbol(DstFormOptions opts);
DstSlot dst_copmile_array(DstFormOptions opts);
DstSlot dst_copmile_struct(DstFormOptions opts);
DstSlot dst_copmile_table(DstFormOptions opts);
/* Tuple compiliation will handle much of the work */
DstSlot dst_compile_tuple(DstFormOptions opts);
/* Compile special forms */
DstSlot dst_compile_do(DstFormOptions opts);
DstSlot dst_compile_fn(DstFormOptions opts);
DstSlot dst_compile_cond(DstFormOptions opts);
DstSlot dst_compile_while(DstFormOptions opts);
DstSlot dst_compile_quote(DstFormOptions opts);
DstSlot dst_compile_def(DstFormOptions opts);
DstSlot dst_compile_var(DstFormOptions opts);
DstSlot dst_compile_varset(DstFormOptions opts);
/* Compile source code into FuncDef. */
DstCompileResults dst_compile(DstCompileOptions opts);
/****************************************************/
DstSlot dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m);
DstSlot dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m);
/* Use these to get sub options. They will traverse the source map so
* compiler errors make sense. Then modify the returned options. */
DstFormOptions dst_compile_getopts_index(DstFormOptions opts, int32_t index);
DstFormOptions dst_compile_getopts_key(DstFormOptions opts, DstValue key);
DstFormOptions dst_compile_getopts_value(DstFormOptions opts, DstValue key);
void dst_compile_scope(DstCompiler *c, int newfn);
DstSlot dst_compile_popscope(DstCompiler *c);
int dst_compile_slotmatch(DstFormOptions opts, DstSlot slot);
DstSlot dst_compile_normalslot(DstCompiler *c, uint32_t types);
DstSlot dst_compile_constantslot(DstCompiler *c, DstValue x);
void dst_compile_freeslot(DstCompiler *c, DstSlot slot);
void dst_compile_freeslotarray(DstCompiler *c, DstArray *slots);
/* Search for a symbol */
DstSlot dst_compile_resolve(DstCompiler *c, const DstValue *sourcemap, const uint8_t *sym);
/* Get a local slot that can be used as the desination for whatever is compiling. */
DstSlot dst_compile_targetslot(DstFormOptions opts, DstSlot s);
/* Coerce any slot into the target slot. If no target is specified, return
* the slot unaltered. Otherwise, move and load upvalues as necesarry to set the slot. */
DstSlot dst_compile_coercetargetslot(DstFormOptions opts, DstSlot s);
DstSlot dst_compile_realizeslot(DstCompiler *c, DstSlot s);
DstSlot dst_compile_returnslot(DstCompiler *c, DstSlot s);
/* Emit instructions. */
DstSlot dst_compile_emit_movenear(DstCompiler *c, DstSlot slot);
void dst_compile_emit_movefar(DstCompiler *c, DstSlot near, DstSlot orig);
void dst_compile_emit_ss(DstCompiler *c, DstOpCode op, DstSlot dest, DstSlot src);
void dst_compile_emit_sss(DstCompiler *c, DstOpCode op, DstSlot dest, DstSlot s1, DstSlot s2);
void dst_compile_emit_sss_src(DstCompiler *c, DstOpCode op, DstSlot s1, DstSlot s2, DstSlot s3);
#endif

4
Makefile
View File

@ -26,7 +26,7 @@ PREFIX?=/usr/local
BINDIR=$(PREFIX)/bin
VERSION=\"0.0.0-beta\"
CFLAGS=-std=c99 -Wall -Wextra -I./include -I./libs -g -DDST_VERSION=$(VERSION)
CFLAGS=-std=c99 -Wall -Wextra -Wfatal-errors -I./include -I./libs -g -DDST_VERSION=$(VERSION)
PREFIX=/usr/local
DST_TARGET=dst
DST_XXD=xxd
@ -59,7 +59,7 @@ $(DST_XXD): libs/xxd.c
###################################
DST_CORE_SOURCES=$(addprefix core/,\
array.c asm.c buffer.c fiber.c func.c gc.c parse.c string.c strtod.c\
array.c asm.c buffer.c compile.c fiber.c func.c gc.c parse.c string.c strtod.c\
struct.c symcache.c syscalls.c table.c tuple.c userdata.c util.c\
value.c vm.c wrap.c)
DST_CORE_OBJECTS=$(patsubst %.c,%.o,$(DST_CORE_SOURCES))

7
core/asm.c
View File

@ -133,13 +133,16 @@ static const DstInstructionDef dst_ops[] = {
{"jump-if", DIT_SL, DOP_JUMP_IF},
{"jump-if-not", DIT_SL, DOP_JUMP_IF_NOT},
{"less-than", DIT_SSS, DOP_LESS_THAN},
{"load-boolean", DIT_S, DOP_LOAD_BOOLEAN},
{"load-constant", DIT_SC, DOP_LOAD_CONSTANT},
{"load-false", DIT_S, DOP_LOAD_FALSE},
{"load-integer", DIT_SI, DOP_LOAD_INTEGER},
{"load-nil", DIT_S, DOP_LOAD_NIL},
{"load-self", DIT_S, DOP_LOAD_SELF},
{"load-syscall", DIT_SU, DOP_LOAD_SYSCALL},
{"load-true", DIT_S, DOP_LOAD_TRUE},
{"load-upvalue", DIT_SES, DOP_LOAD_UPVALUE},
{"move", DIT_SS, DOP_MOVE},
{"move-far", DIT_SS, DOP_MOVE_FAR},
{"move-near", DIT_SS, DOP_MOVE_NEAR},
{"multiply", DIT_SSS, DOP_MULTIPLY},
{"multiply-immediate", DIT_SSI, DOP_MULTIPLY_IMMEDIATE},
{"multiply-integer", DIT_SSS, DOP_MULTIPLY_INTEGER},

551
core/compile.c
View File

@ -23,46 +23,54 @@
#include <dst/dst.h>
#include "compile.h"
static void dst_compile_cleanup(DstCompiler *c) {
/* Lazily sort the optimizers */
static int optimizers_sorted = 0;
/* Lookups for specials and optimizable c functions. */
DstCFunctionOptimizer dst_compiler_optimizers[255];
DstSpecial dst_compiler_specials[16];
/* Deinitialize a compiler struct */
static void dst_compile_cleanup(DstCompiler *c) {
while (c->scopecount)
dst_compile_popscope(c);
free(c->scopes);
free(c->buffer);
free(c->mapbuffer);
c->buffer = NULL;
c->mapbuffer = NULL;
c->scopes = NULL;
}
DstSlot dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m) {
DstSlot ret;
/* Throw an error with a dst string */
void dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m) {
c->error_start = dst_unwrap_integer(sourcemap[0]);
c->error_end = dst_unwrap_integer(sourcemap[1]);
c->error = m;
ret.flags = DST_SLOT_ERROR;
ret.index = 0;
ret.constant = dst_wrap_nil();
return ret;
c->error = dst_wrap_string(m);
longjmp(c->on_error, 1);
}
DstSlot dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m) {
return dst_compile_error(c, sourcemap, dst_cstring(m));
/* Throw an error with a message in a cstring */
void dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m) {
dst_compile_error(c, sourcemap, dst_cstring(m));
}
/* Use these to get sub options. They will traverse the source map so
* compiler errors make sense. Then modify the returned options. */
DstFormOptions dst_compile_getopts_index(DstFormOptions opts, int32_t index) {
DstCompiler *c = opts.compiler;
const DstValue *sourcemap = dst_parse_submap_index(opts.sourcemap, index);
DstValue nextval = dst_getindex(opts.x, index);
opts.x = nextval;
opts.sourcemap = sourcemap;
return opts;
}
DstFormOptions dst_compile_getopts_key(DstFormOptions opts, DstValue key) {
DstCompiler *c = opts.compiler;
const DstValue *sourcemap = dst_parse_submap_key(opts.sourcemap, key);
opts.x = key;
opts.sourcemap = sourcemap;
return opts;
}
DstFormOptions dst_compile_getopts_value(DstFormOptions opts, DstValue key) {
DstCompiler *c = opts.compiler;
const DstValue *sourcemap = dst_parse_submap_value(opts.sourcemap, key);
DstValue nextval = dst_get(opts.x, key);
opts.x = nextval;
@ -70,142 +78,152 @@ DstFormOptions dst_compile_getopts_value(DstFormOptions opts, DstValue key) {
return opts;
}
/* Eneter a new scope */
void dst_compile_scope(DstCompiler *c, int newfn) {
DstScope *scope;
if (c->scopecap < c->scopecount) {
c->scopes = realloc(c->scopes, 2 * sizeof(DstScope) * c->scopecount + 2);
if (NULL == c->scope) {
void dst_compile_slotpool_init(DstSlotPool *pool) {
pool->s = NULL;
pool->count = 0;
pool->free = 0;
pool->cap = 0;
}
void dst_compile_slotpool_deinit(DstSlotPool *pool) {
free(pool->s);
pool->s = NULL;
pool->cap = 0;
pool->count = 0;
}
void dst_compile_slotpool_extend(DstSlotPool *pool, int32_t extra) {
int32_t i;
int32_t newcount = pool->count + extra;
if (newcount > pool->cap) {
int32_t newcap = 2 * newcount;
pool->s = realloc(pool->s, newcap * sizeof(DstSlot));
if (NULL == pool->s) {
DST_OUT_OF_MEMORY;
}
pool->cap = newcap;
}
scope = c->scopes + c->scopecount++;
/* Mark all slots as free */
for (i = pool->count; i < newcount; i++) {
pool->s[i].flags = 0;
}
pool->count = newcount;
}
DstSlot *dst_compile_slotpool_alloc(DstSlotPool *pool) {
int32_t oldcount = pool->count;
int32_t newcount = oldcount == 0xF0 ? 0x101 : oldcount + 1;
while (pool->free < pool->count) {
if (!(pool->s[pool->free].flags & DST_SLOT_NOTEMPTY)) {
return pool->s + pool->free;
}
pool->free++;
}
dst_compile_slotpool_extend(pool, newcount - oldcount);
pool->s[oldcount].flags = DST_SLOT_NOTEMPTY;
pool->s[oldcount].index = newcount - 1;
return pool->s + newcount - 1;
}
void dst_compile_slotpool_freeindex(DstSlotPool *pool, int32_t index) {
if (index > 0 && index < pool->count) {
pool->s[index].flags = 0;
if (index < pool->free)
pool->free = index;
}
}
void dst_compile_slotpool_free(DstSlotPool *pool, DstSlot *s) {
DstSlot *oldfree = pool->s + pool->free;
if (s >= pool->s && s < (pool->s + pool->count)) {
if (s < oldfree) {
pool->free = s - pool->s;
}
s->flags = 0;
}
}
/* Eneter a new scope */
void dst_compile_scope(DstCompiler *c, int newfn) {
int32_t newcount, oldcount;
int32_t newlevel, oldlevel;
DstScope *scope;
oldcount = c->scopecount;
newcount = oldcount + 1;
oldlevel = c->scopecount
? c->scopes[c->scopecount - 1].level
: 0;
newlevel = oldlevel + newfn;
if (newcount < c->scopecap) {
int32_t newcap = 2 * newcount;
c->scopes = realloc(c->scopes, newcap * sizeof(DstScope));
if (NULL == c->scopes) {
DST_OUT_OF_MEMORY;
}
c->scopecap = newcap;
}
scope = c->scopes + oldcount;
c->scopecount = newcount;
dst_array_init(&scope->constants, 0);
dst_table_init(&scope->symbols, 4);
dst_table_init(&scope->constantrev, 4);
scope->envs = NULL;
scope->envcount = 0;
scope->envcap = 0;
scope->slots = NULL;
scope->slotcount = 0;
scope->slotcap = 0;
scope->bytecode_start = c->buffercount;
scope->freeslots = NULL;
scope->freeslotcount = 0;
scope->freeslotcap = 0;
dst_compile_slotpool_init(&scope->slots);
dst_compile_slotpool_init(&scope->unorderedslots);
scope->buffer_offset = c->buffer.count;
scope->nextslot = 0;
scope->lastslot = -1;
scope->level = newlevel;
scope->flags = newfn ? DST_SCOPE_FUNCTION : 0;
}
DstSlot dst_slot_nil() {
DstSlot ret;
ret.index = 0;
ret.flags = (1 << DST_TYPE_NIL) | DST_SLOT_CONSTANT;
ret.constant = dst_wrap_nil();
return ret;
}
/* Leave a scope. Does not build closure*/
/* Leave a scope. */
void dst_compile_popscope(DstCompiler *c) {
DstScope *scope;
DstSlot ret;
dst_assert(c->scopecount, "could not pop scope");
scope = c->scopes + --c->scopecount;
/* Move free slots to parent scope if not a new function */
/* Move free slots to parent scope if not a new function.
* We need to know the total number of slots used when compiling the function. */
if (!(scope->flags & DST_SCOPE_FUNCTION) && c->scopecount) {
int32_t i;
int32_t newcount;
DstScope *topscope = c->scopes + c->scopecount - 1;
topscope->nextslot = scope->nextslot;
newcount = topscope->freeslotcount + scope->freeslotcount;
if (topscope->freeslotcap < newcount) {
topscope->freeslots = realloc(topscope->freeslot, sizeof(int32_t) * newcount);
if (NULL == topscope->freeslots) {
DST_OUT_OF_MEMORY;
}
topscope->freeslotcap = newcount;
}
memcpy(
topscope->freeslots + topescope->freeslotcount,
scope->freeslots,
sizeof(int32_t) * scope->freeslotcount);
topscope->freeslotcount = newcount;
DstScope *newscope = dst_compile_topscope(c);
dst_compile_slotpool_extend(&newscope->slots, scope->slots.count);
}
dst_table_deinit(&scope->symbols);
dst_table_deinit(&scope->constantrev);
dst_array_deinit(&scope->constants);
free(scope->slots);
free(scope->freeslots);
dst_compile_slotpool_deinit(&scope->slots);
dst_compile_slotpool_deinit(&scope->unorderedslots);
free(scope->envs);
return ret;
}
#define dst_compile_topscope(c) ((c)->scopes + (c)->scopecount - 1)
/* Allocate a slot space */
static int32_t dst_compile_slotalloc(DstCompiler *c) {
DstSlot *dst_compile_constantslot(DstCompiler *c, DstValue x) {
DstScope *scope = dst_compile_topscope(c);
if (scope->freeslotcount == 0) {
return scope->nextslot++;
} else {
return scope->freeslots[--scope->freeslotcount];
}
}
int dst_compile_slotmatch(DstFormOptions opts, DstSlot slot) {
return opts.type & slot.type;
}
DstSlot dst_compile_normalslot(DstCompiler *c, uint32_t flags) {
DstSlot ret;
int32_t index = dst_compile_slotalloc(c);
ret.flags = flags;
ret.constant = dst_wrap_nil();
ret.index = index;
ret.envindex = 0;
return ret;
}
DstSlot dst_compile_constantslot(DstCompiler *c, DstValue x) {
DstSlot ret;
ret.flags = (1 << dst_type(x)) | DST_SLOT_CONSTANT;
ret.index = -1;
ret.constant = x;
ret.envindex = 0;
DstSlot *ret = dst_compile_slotpool_alloc(&scope->unorderedslots);
ret->flags = (1 << dst_type(x)) | DST_SLOT_CONSTANT | DST_SLOT_NOTEMPTY;
ret->index = -1;
ret->constant = x;
ret->envindex = scope->level;
return ret;
}
/* Free a single slot */
void dst_compile_freeslot(DstCompiler *c, DstSlot slot) {
void dst_compile_freeslot(DstCompiler *c, DstSlot *slot) {
DstScope *scope = dst_compile_topscope(c);
int32_t newcount = scope->freeslotcount + 1;
if (slot.flags & (DST_SLOT_CONSTANT | DST_SLOT_ERROR))
if (slot->flags & (DST_SLOT_CONSTANT)) {
return;
if (scope->freeslotcap < newcount) {
int32_t newcap = 2 * newcount;
scope->freeslots = realloc(scope->freeslots, sizeof(int32_t) * newcap);
if (NULL == scope->freeslots) {
DST_OUT_OF_MEMORY;
}
scope->freeslotcap = newcap;
}
scope->freeslots[scope->freeslotcount] = slot.index;
scope->freeslotcount = newcount;
}
/* Free an array of slots */
void dst_compile_freeslotarray(DstCompiler *c, DstArray *slots) {
int32_t i;
for (i = 0; i < slots->count; i++) {
dst_compile_freeslot(c, slots->data[i]);
if (slot->envindex != 0) {
return;
}
dst_compile_slotpool_free(&scope->slots, slot);
}
/*
* The mechanism for passing environments to to closures is a bit complicated,
* The mechanism for passing environments to closures is a bit complicated,
* but ensures a few properties.
* * Environments are on the stack unless they need to be closurized
* * Environments can be shared between closures
@ -223,38 +241,39 @@ void dst_compile_freeslotarray(DstCompiler *c, DstArray *slots) {
*/
/* Allow searching for symbols. Return information about the symbol */
DstSlot dst_compile_resolve(
DstSlot *dst_compile_resolve(
DstCompiler *c,
const DstValue *sourcemap,
const uint8_t *sym) {
DstSlot ret;
DstSlot *ret = NULL;
DstScope *scope = dst_compile_topscope(c);
int32_t env_index = 0;
int foundlocal;
int foundlocal = 1;
/* Search scopes for symbol, starting from top */
while (scope >= c->scopes) {
DstValue check = dst_table_get(scope->symbols, dst_wrap_symbol(sym));
if (dst_checktype(check, DST_INTEGER)) {
ret = scope->slots[dst_unwrap_integer(check)];
DstValue check = dst_table_get(&scope->symbols, dst_wrap_symbol(sym));
if (dst_checktype(check, DST_USERDATA)) {
ret = dst_unwrap_pointer(check);
goto found;
}
scope--;
if (scope->flags & DST_SCOPE_FUNCTION)
foundlocal = 0;
}
/* Symbol not found */
return dst_compile_error(c, sourcemap, dst_formatc("unknown symbol %q", sym));
dst_compile_error(c, sourcemap, dst_formatc("unknown symbol %q", sym));
/* Symbol was found */
found:
/* Constants and errors can be returned immediately (they are stateless) */
if (ret.flags & (DST_SLOT_CONSTANT | DST_SLOT_ERROR))
/* Constants can be returned immediately (they are stateless) */
if (ret->flags & DST_SLOT_CONSTANT)
return ret;
/* non-local scope needs to expose its environment */
foundlocal = scope == dst_compile_topscope(c);
if (!foundlocal) {
scope->flags |= DST_SCOPE_ENV;
if (scope->envcount < 1) {
@ -264,13 +283,14 @@ DstSlot dst_compile_resolve(
DST_OUT_OF_MEMORY;
}
scope->envcap = 10;
scope->envs[0] = -1;
scope->envs[0] = 0;
}
scope++;
}
/* Propogate env up to current scope */
while (scope <= dst_compile_topscope(c)) {
if (scope->flags & DST_SCOPE_FUNCTION) {
int32_t j;
int32_t newcount = scope->envcount + 1;
int scopefound = 0;
@ -296,29 +316,53 @@ DstSlot dst_compile_resolve(
scope->envs[scope->envcount] = env_index;
scope->envcount = newcount;
}
}
scope++;
}
/* Take the slot from the upper scope, and set its envindex before returning. */
/* Store in the unordered slots so we don't modify the original slot. */
if (!foundlocal) {
ret.envindex = env_index;
DstSlot *newret = dst_compile_slotpool_alloc(&scope->unorderedslots);
*newret = *ret;
newret->envindex = env_index;
ret = newret;
}
return ret;
}
DstSlot *dst_compile_def(DstFormOptions opts, int32_t argn, const DstValue *argv) {
DstScope *scope;
DstSlot *rvalue;
DstFormOptions subopts;
DstValue check;
if (argn != 2)
dst_compile_cerror(opts.compiler, opts.sourcemap, "expected 2 arguments");
if (!dst_checktype(argv[0], DST_SYMBOL))
dst_compile_cerror(opts.compiler, opts.sourcemap, "expected symbol");
scope = dst_compile_topscope(opts.compiler);
check = dst_table_get(&scope->symbols, argv[0]);
if (dst_checktype(check, DST_INTEGER)) {
dst_compile_cerror(opts.compiler, opts.sourcemap, "cannot redefine symbol");
}
subopts = dst_compile_getopts_index(opts, 1);
rvalue = dst_compile_value(subopts);
dst_table_put(&scope->symbols, argv[0], dst_wrap_userdata(rvalue));
return rvalue;
}
/* Compile an array */
/* Compile a single value */
DstSlot dst_compile_value(DstFormOptions opts) {
DstSlot ret;
DstSlot *dst_compile_value(DstFormOptions opts) {
DstSlot *ret;
if (opts.compiler->recursion_guard <= 0) {
return dst_compiler_cerror(opts.compiler, opts.sourcemap, "recursed too deeply");
dst_compile_cerror(opts.compiler, opts.sourcemap, "recursed too deeply");
}
opts.compiler->recursion_guard--;
switch (dst_type(opts.x)) {
default:
ret = dst_compile_constantslot(opts.x);
ret = dst_compile_constantslot(opts.compiler, opts.x);
break;
case DST_SYMBOL:
{
@ -326,28 +370,241 @@ DstSlot dst_compile_value(DstFormOptions opts) {
if (dst_string_length(sym) > 0 && sym[0] != ':')
ret = dst_compile_resolve(opts.compiler, opts.sourcemap, sym);
else
ret = dst_compile_constantslot(opts.x);
ret = dst_compile_constantslot(opts.compiler, opts.x);
break;
}
case DST_TUPLE:
ret = dst_compile_tuple(opts);
break;
case DST_ARRAY:
ret = dst_compile_array(opts);
break;
case DST_STRUCT:
ret = dst_compile_struct(opts);
break;
case DST_TABLE:
ret = dst_compile_table(opts);
break;
/*case DST_TUPLE:*/
/*ret = dst_compile_tuple(opts); */
/*break;*/
/*case DST_ARRAY:*/
/*ret = dst_compile_array(opts); */
/*break;*/
/*case DST_STRUCT:*/
/*ret = dst_compile_struct(opts); */
/*break;*/
/*case DST_TABLE:*/
/*ret = dst_compile_table(opts);*/
/*break;*/
}
opts.compiler->recursion_guard++;
return ret;
}
DstSlot dst_compile_targetslot(DstFormOptions opts, DstSlot s);
/* Emit a raw instruction with source mapping. */
void dst_compile_emit(DstCompiler *c, const DstValue *sourcemap, uint32_t instr) {
int32_t index = c->buffercount;
int32_t newcount = index + 1;
if (newcount > c->buffercap) {
int32_t newcap = 2 * newcount;
c->buffer = realloc(c->buffer, newcap * sizeof(int32_t));
c->mapbuffer = realloc(c->mapbuffer, newcap * sizeof(int32_t) * 2);
if (NULL == c->buffer || NULL == c->mapbuffer) {
DST_OUT_OF_MEMORY;
}
c->buffercap = newcap;
}
c->buffercount = newcount;
if (NULL != sourcemap) {
c->mapbuffer[index][0] = dst_unwrap_integer(sourcemap[0]);
c->mapbuffer[index][1] = dst_unwrap_integer(sourcemap[1]);
}
c->buffer[index] = instr;
}
/* Coerce any slot into the target slot. If no target is specified, return
* the slot unaltered. Otherwise, move and load upvalues as necesarry to set the slot. */
DstSlot dst_compile_coercetargetslot(DstFormOptions opts, DstSlot s);
/* Represents a local slot - not a constant, and within a specified range. Also
* contains if it corresponds to a real slot. If temp, then the slot index
* should be free right after use */
typedef struct DstLocalSlot DstLocalSlot;
struct DstLocalSlot {
DstSlot *orig;
int temp;
int dirty;
int32_t index;
};
/* Get the index of a constant */
static int32_t dst_compile_constant_index(DstCompiler *c, const DstValue *sourcemap, DstValue x) {
DstScope *scope = dst_compile_topscope(c);
DstValue check;
int32_t count = scope->constants.count;
check = dst_table_get(&scope->constantrev, x);
if (dst_checktype(check, DST_INTEGER)) {
return dst_unwrap_integer(check);
}
if (count >= 0xFFFF) {
dst_compile_cerror(c, sourcemap, "too many constants");
}
dst_array_push(&scope->constants, x);
dst_table_put(&scope->constantrev, x, dst_wrap_integer(count));
return count;
}
/* Realize any slot to a local slot. Call this to get a slot index
* that can be used in an instruction. */
static DstLocalSlot dst_compile_slot_pre(
DstCompiler *c,
const DstValue *sourcemap,
int32_t max,
int32_t hint,
int isdest,
int nth,
DstSlot *s) {
DstScope *scope = dst_compile_topscope(c);
DstLocalSlot ret;
ret.orig = s;
ret.dirty = isdest;
ret.temp = 0;
if (s->flags & DST_SLOT_CONSTANT) {
int32_t cindex;
int32_t nextfree = dst_compile_slotpool_alloc(&scope->slots)->index;
if (hint >= 0 && hint <= 0xFF) {
ret.index = hint;
} else if (nextfree >= 0xF0) {
ret.index = 0xF0 + nth;
dst_compile_slotpool_freeindex(&scope->slots, nextfree);
} else {
ret.temp = 1;
ret.index = nextfree;
}
/* Use instructions for loading certain constants */
switch (dst_type(s->constant)) {
case DST_NIL:
dst_compile_emit(c, sourcemap, ((uint32_t)(ret.index) << 8) | DOP_LOAD_NIL);
break;
case DST_TRUE:
dst_compile_emit(c, sourcemap, ((uint32_t)(ret.index) << 8) | DOP_LOAD_TRUE);
break;
case DST_FALSE:
dst_compile_emit(c, sourcemap, ((uint32_t)(ret.index) << 8) | DOP_LOAD_FALSE);
break;
case DST_INTEGER:
{
int32_t i = dst_unwrap_integer(s->constant);
if (i <= INT16_MAX && i >= INT16_MIN) {
dst_compile_emit(c, sourcemap,
((uint32_t)i << 16) |
((uint32_t)(ret.index) << 8) |
DOP_LOAD_INTEGER);
break;
}
/* fallthrough */
}
default:
cindex = dst_compile_constant_index(c, sourcemap, s->constant);
if (isdest)
dst_compile_cerror(c, sourcemap, "cannot write to a constant");
dst_compile_emit(c, sourcemap,
((uint32_t)cindex << 16) |
((uint32_t)(ret.index) << 8) |
DOP_LOAD_CONSTANT);
break;
}
} else if (s->envindex > 0 || s->index > max) {
/* Get a local slot to shadow the environment or far slot */
int32_t nextfree = dst_compile_slotpool_alloc(&scope->slots)->index;
if (hint >= 0 && hint <= 0xFF) {
ret.index = hint;
} else if (nextfree >= 0xF0) {
ret.index = 0xF0 + nth;
dst_compile_slotpool_freeindex(&scope->slots, nextfree);
} else {
ret.temp = 1;
ret.index = nextfree;
}
if (!isdest) {
/* Move the remote slot into the local space */
if (s->envindex > 0) {
/* Load the higher slot */
dst_compile_emit(c, sourcemap,
((uint32_t)(s->index) << 24) |
((uint32_t)(s->envindex) << 16) |
((uint32_t)(ret.index) << 8) |
DOP_LOAD_UPVALUE);
} else {
/* Slot is a far slot: greater than 0xFF. Get
* the far data and bring it to the near slot. */
dst_compile_emit(c, sourcemap,
((uint32_t)(s->index) << 16) |
((uint32_t)(ret.index) << 8) |
DOP_MOVE_NEAR);
}
}
} else if (hint >= 0 && hint <= 0xFF && isdest) {
ret.index = hint;
} else {
/* We have a normal slot that fits in the required bit width */
ret.index = s->index;
}
return ret;
}
/* Call this on a DstLocalSlot to free the slot or sync any changes
* made after the instruction has been emitted. */
static void dst_compile_slot_post(
DstCompiler *c,
const DstValue *sourcemap,
DstLocalSlot ls) {
DstSlot *s = ls.orig;
DstScope *scope = dst_compile_topscope(c);
if (ls.temp)
dst_compile_slotpool_freeindex(&scope->slots, ls.index);
if (ls.dirty) {
/* We need to save the data in the local slot to the original slot */
if (s->envindex > 0) {
/* Load the higher slot */
dst_compile_emit(c, sourcemap,
((uint32_t)(s->index) << 24) |
((uint32_t)(s->envindex) << 16) |
((uint32_t)(ls.index) << 8) |
DOP_SET_UPVALUE);
} else if (s->index != ls.index) {
/* There was a local remapping */
dst_compile_emit(c, sourcemap,
((uint32_t)(s->index) << 16) |
((uint32_t)(ls.index) << 8) |
DOP_MOVE_FAR);
}
}
}
static void dst_compile_pop_funcdef(DstCompiler *c) {
DstScope *scope = dst_compiler_topscope(c);
DstFuncDef *def;
/* Initialize funcdef */
def = dst_alloc(DST_MEMORY_FUNCDEF, sizeof(DstFuncDef));
def->environments = NULL;
def->constants = NULL;
def->bytecode = NULL;
def->flags = 0;
def->slotcount = 0;
def->arity = 0;
def->constants_length = 0;
def->bytecode_length = 0;
def->environments_length = 1;
}
DstCompileResults dst_compile(DstCompileOptions opts) {
DstCompiler c;
if (setjmp(c.on_error)) {
c.results.status = DST_COMPILE_ERROR;
dst_compile_cleanup(&c);
results.funcdef = NULL;
return c.results;
}
/* Initialize the compiler struct */
c.scopecount = 0;
c.scopecap = 0;
c.scopes = NULL;
c.buffercap = 0;
c.buffercount = 0;
c->buffer = NULL;
c->mapbuffer;
c->recursion_guard = 1024;
}

173
core/compile.h
View File

@ -24,20 +24,24 @@
#define DST_COMPILE_H
#include <dst/dst.h>
#include <setjmp.h>
#include "opcodes.h"
/* Compiler typedefs */
typedef struct DstCompiler DstCompiler;
typedef struct FormOptions FormOptions;
typedef struct SlotTracker SlotTracker;
typedef struct DstScope DstScope;
typedef struct DstSlot DstSlot;
typedef struct DstFormOptions DstFormOptions;
typedef struct DstCFunctionOptimizer DstCFunctionOptimizer;
#define DST_SLOT_CONSTANT 0x10000
#define DST_SLOT_TEMP 0x20000
#define DST_SLOT_NAMED 0x20000
#define DST_SLOT_RETURNED 0x40000
#define DST_SLOT_NIL 0x80000
#define DST_SLOT_MUTABLE 0x100000
#define DST_SLOT_ERROR 0x200000
#define DST_SLOT_NOTEMPTY 0x200000
#define DST_SLOTTYPE_ANY 0xFFFF
@ -47,7 +51,7 @@ struct DstSlot {
int32_t envindex; /* 0 is local, positive number is an upvalue */
uint32_t flags;
DstValue constant; /* If the slot has a constant value */
}
};
/* Most forms that return a constant will not generate any bytecode */
@ -62,67 +66,59 @@ struct DstSlot {
* do
*/
#define DST_OPTIMIZER_CONSTANTS 0x10000
#define DST_OPTIMIZER_BYTECODE 0x20000
#define DST_OPTIMIZER_PARTIAL_CONSTANTS 0x40000
#define DST_OPTIMIZER_SYSCALL 0x80000
/* A grouping of optimization on a cfunction given certain conditions
* on the arguments (such as all constants, or some known types). The appropriate
* optimizations should be tried before compiling a normal function call. */
struct DstCFunctionOptimizer {
uint32_t flags; /* Indicate what kind of optimizations can be performed. */
/*Also what kind of types can be returned*/
int32_t syscall;
}
#define DST_SCOPE_FUNCTION 1
#define DST_SCOPE_LASTSLOT 2
#define DST_SCOPE_FIRSTSLOT 4
#define DST_SCOPE_ENV
#define DST_SCOPE_ENV 8
/* Hold a bunch of slots together */
typedef struct DstSlotPool DstSlotPool;
struct DstSlotPool {
DstSlot *s;
int32_t count;
int32_t cap;
int32_t free;
};
/* A lexical scope during compilation */
struct DstScope {
int32_t level;
DstArray constants; /* Constants for the funcdef */
DstTable symbols; /* Map symbols -> Slot inidices */
DstTable constantrev; /* Map constants -> constant inidices */
DstTable symbols; /* Map symbols -> Slot pointers */
/* Hold all slots in use. Data structures that store
* slots should link them to this datatstructure */
DstSlot *slots;
int32_t slotcount;
int32_t slotcap;
DstSlotPool slots;
DstSlotPool unorderedslots;
/* A vector of freed slots. */
int32_t *freeslots;
int32_t freeslotcount;
int32_t freeslotcap;
int32_t lastslot;
int32_t nextslot;
/* Referenced closure environemts. The values at each index correspond
/* Referenced closure environents. The values at each index correspond
* to which index to get the environment from in the parent. The enironment
* that corresponds to the direct parent's stack will always have value 0. */
int32_t *envs;
int32_t envcount;
int32_t envcap;
int32_t buffer_offset; /* Where the bytecode for this scope begins */
int32_t bytecode_start;
uint32_t flags;
}
};
#define dst_compile_topscope(c) ((c)->scopes + (c)->scopecount - 1)
/* Compilation state */
struct DstCompiler {
jmp_buf on_error;
int recursion_guard;
int32_t scopecount;
int32_t scopecap;
DstScope *scopes;
DstBuffer buffer;
DstBuffer mapbuffer;
int32_t error_start;
int32_t error_end;
DstValue error;
int recursion_guard;
int32_t buffercap;
int32_t buffercount;
uint32_t *buffer;
int32_t (*mapbuffer)[2];
DstCompileResults results;
};
#define DST_FOPTS_TAIL 0x10000
@ -136,58 +132,48 @@ struct DstFormOptions {
uint32_t flags; /* bit set of accepted primitive types */
};
typedef enum DstCompileStatus {
DST_COMPILE_OK,
DST_COMPILE_ERROR
} DstCompileStatus;
/* Results of compilation */
typedef struct DstCompileResults {
DstCompileStatus status;
DstFuncDef *funcdef;
const uint8_t *error;
} DstCompileResults;
typedef struct DstCompileOptions {
uint32_t flags;
const DstValue *sourcemap;
DstValue src;
int32_t target;
/* A grouping of optimizations on a cfunction given certain conditions
* on the arguments (such as all constants, or some known types). The appropriate
* optimizations should be tried before compiling a normal function call. */
struct DstCFunctionOptimizer {
DstCFunction cfun;
DstSlot (*optimize)(DstFormOptions opts, int32_t argn, const DstValue *argv);
};
typedef struct DstSpecial {
const char *name;
DstSlot (*compile)(DstFormOptions opts, int32_t argn, const DstValue *argv);
} DstSpecial;
/* Compiler handlers. Used to compile different kinds of expressions. */
typedef DstSlot (*DstFormCompiler)(DstFormOptions opts);
/* An array of optimizers sorted by key */
extern DstCFunctionOptimizer dst_compiler_optimizers[255];
/* An array of special forms */
extern DstSpecial dst_compiler_specials[16];
void dst_compile_slotpool_init(DstSlotPool *pool);
void dst_compile_slotpool_deinit(DstSlotPool *pool);
DstSlot *dst_compile_slotpool_alloc(DstSlotPool *pool);
void dst_compile_slotpool_extend(DstSlotPool *pool, int32_t extra);
void dst_compile_slotpool_free(DstSlotPool *pool, DstSlot *s);
void dst_compile_slotpool_freeindex(DstSlotPool *pool, int32_t index);
/* Dispatch to correct form compiler */
DstSlot dst_compile_value(DstFormOptions opts);
/* Compile basic types */
DstSlot dst_compile_constant(DstFormOptions opts);
DstSlot dst_compile_symbol(DstFormOptions opts);
DstSlot dst_copmile_array(DstFormOptions opts);
DstSlot dst_copmile_struct(DstFormOptions opts);
DstSlot dst_copmile_table(DstFormOptions opts);
/* Tuple compiliation will handle much of the work */
DstSlot dst_compile_tuple(DstFormOptions opts);
DstSlot *dst_compile_value(DstFormOptions opts);
/* Compile special forms */
DstSlot dst_compile_do(DstFormOptions opts);
DstSlot dst_compile_fn(DstFormOptions opts);
DstSlot dst_compile_cond(DstFormOptions opts);
DstSlot dst_compile_while(DstFormOptions opts);
DstSlot dst_compile_quote(DstFormOptions opts);
DstSlot dst_compile_def(DstFormOptions opts);
DstSlot dst_compile_var(DstFormOptions opts);
DstSlot dst_compile_varset(DstFormOptions opts);
/* Compile source code into FuncDef. */
DstCompileResults dst_compile(DstCompileOptions opts);
DstSlot *dst_compile_do(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_fn(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_cond(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_while(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_quote(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_def(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_var(DstFormOptions opts, int32_t argn, const DstValue *argv);
DstSlot *dst_compile_varset(DstFormOptions opts, int32_t argn, const DstValue *argv);
/****************************************************/
DstSlot dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m);
DstSlot dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m);
void dst_compile_error(DstCompiler *c, const DstValue *sourcemap, const uint8_t *m);
void dst_compile_cerror(DstCompiler *c, const DstValue *sourcemap, const char *m);
/* Use these to get sub options. They will traverse the source map so
* compiler errors make sense. Then modify the returned options. */
@ -196,25 +182,16 @@ DstFormOptions dst_compile_getopts_key(DstFormOptions opts, DstValue key);
DstFormOptions dst_compile_getopts_value(DstFormOptions opts, DstValue key);
void dst_compile_scope(DstCompiler *c, int newfn);
DstSlot dst_compile_popscope(DstCompiler *c);
void dst_compile_popscope(DstCompiler *c);
int dst_compile_slotmatch(DstFormOptions opts, DstSlot slot);
DstSlot dst_compile_normalslot(DstCompiler *c, uint32_t types);
DstSlot dst_compile_constantslot(DstCompiler *c, DstValue x);
void dst_compile_freeslot(DstCompiler *c, DstSlot slot);
void dst_compile_freeslotarray(DstCompiler *c, DstArray *slots);
DstSlot *dst_compile_constantslot(DstCompiler *c, DstValue x);
void dst_compile_freeslot(DstCompiler *c, DstSlot *slot);
/* Search for a symbol */
DstSlot dst_compile_resolve(DstCompiler *c, const DstValue *sourcemap, const uint8_t *sym);
DstSlot *dst_compile_resolve(DstCompiler *c, const DstValue *sourcemap, const uint8_t *sym);
/* Get a local slot that can be used as the desination for whatever is compiling. */
DstSlot dst_compile_targetslot(DstFormOptions opts, DstSlot s);
/* Emit instructions. */
/* Coerce any slot into the target slot. If no target is specified, return
* the slot unaltered. Otherwise, move and load upvalues as necesarry to set the slot. */
DstSlot dst_compile_coercetargetslot(DstFormOptions opts, DstSlot s);
DstSlot dst_compile_realizeslot(DstCompiler *c, DstSlot s);
DstSlot dst_compile_returnslot(DstCompiler *c, DstSlot s);
void dst_compile_emit(DstCompiler *c, const DstValue *sourcemap, uint32_t instr);
#endif

7
core/opcodes.h
View File

@ -55,7 +55,8 @@ enum DstOpCode {
DOP_SHIFT_RIGHT_IMMEDIATE,
DOP_SHIFT_RIGHT_UNSIGNED,
DOP_SHIFT_RIGHT_UNSIGNED_IMMEDIATE,
DOP_MOVE,
DOP_MOVE_FAR,
DOP_MOVE_NEAR,
DOP_JUMP,
DOP_JUMP_IF,
DOP_JUMP_IF_NOT,
@ -64,9 +65,11 @@ enum DstOpCode {
DOP_EQUALS,
DOP_COMPARE,
DOP_LOAD_NIL,
DOP_LOAD_BOOLEAN,
DOP_LOAD_TRUE,
DOP_LOAD_FALSE,
DOP_LOAD_INTEGER,
DOP_LOAD_CONSTANT,
DOP_LOAD_SELF,
DOP_LOAD_UPVALUE,
DOP_SET_UPVALUE,
DOP_CLOSURE,

21
core/vm.c
View File

@ -280,11 +280,16 @@ int dst_continue() {
pc++;
vm_next();
case DOP_MOVE:
case DOP_MOVE_NEAR:
stack[oparg(1, 0xFF)] = stack[oparg(2, 0xFFFF)];
pc++;
vm_next();
case DOP_MOVE_FAR:
stack[oparg(2, 0xFFFF)] = stack[oparg(1, 0xFF)];
pc++;
vm_next();
case DOP_JUMP:
pc += (*(int32_t *)pc) >> 8;
vm_next();
@ -342,8 +347,13 @@ int dst_continue() {
pc++;
vm_next();
case DOP_LOAD_BOOLEAN:
stack[oparg(1, 0xFF)] = dst_wrap_boolean(oparg(2, 0xFFFF));
case DOP_LOAD_TRUE:
stack[oparg(1, 0xFFFFFF)] = dst_wrap_boolean(1);
pc++;
vm_next();
case DOP_LOAD_FALSE:
stack[oparg(1, 0xFFFFFF)] = dst_wrap_boolean(0);
pc++;
vm_next();
@ -358,6 +368,11 @@ int dst_continue() {
pc++;
vm_next();
case DOP_LOAD_SELF:
stack[oparg(1, 0xFFFFFF)] = dst_wrap_function(func);
pc++;
vm_next();
case DOP_LOAD_UPVALUE:
{
int32_t eindex = oparg(2, 0xFF);

28
include/dst/dst.h
View File

@ -20,8 +20,8 @@
* IN THE SOFTWARE.
*/
#ifndef DST_NANBOX_H_defined
#define DST_NANBOX_H_defined
#ifndef DST_H_defined
#define DST_H_defined
#include <stdint.h>
#include <string.h>
@ -680,6 +680,30 @@ int dst_continue();
int dst_run(DstValue callee);
DstValue dst_transfer(DstFiber *fiber, DstValue x);
/* Compile */
typedef enum DstCompileStatus {
DST_COMPILE_OK,
DST_COMPILE_ERROR
} DstCompileStatus;
/* Results of compilation */
typedef struct DstCompileResults {
DstCompileStatus status;
DstFuncDef *funcdef;
const uint8_t *error;
int32_t error_start;
int32_t error_end;
} DstCompileResults;
typedef struct DstCompileOptions {
uint32_t flags;
const DstValue *sourcemap;
DstValue src;
} DstCompileOptions;
/* Compile source code into FuncDef. */
DstCompileResults dst_compile(DstCompileOptions opts);
/* GC */
/* The metadata header associated with an allocated block of memory */