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enhanced the compiler to support (continue)

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hyung-hwan
2021-01-29 08:13:18 +00:00
parent 7d3df714a4
commit c4ba555fd0
4 changed files with 104 additions and 36 deletions
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101
hcl/lib/comp2.c
View File

@ -897,22 +897,23 @@ static int compile_or (hcl_t* hcl, hcl_cnode_t* src)
static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
{
/* (break) */
hcl_cnode_t* obj;
hcl_cnode_t* cmd, * obj;
hcl_ooi_t i;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_BREAK));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (obj)
{
if (HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(obj), HCL_NULL, "redundant argument in break");
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(obj), HCL_NULL, "redundant argument in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
}
else
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in break");
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
}
return -1;
}
@ -927,26 +928,79 @@ static int compile_break (hcl_t* hcl, hcl_cnode_t* src)
if (tcf->opcode == COP_POST_UNTIL_BODY || tcf->opcode == COP_POST_WHILE_BODY)
{
hcl_ooi_t jump_inst_pos;
hcl_cframe2_t* cf;
/* (break) is not really a function call. but to make it look like a
* function call, i generate PUSH_NIL so nil becomes a return value.
* (set x (until #f (break)))
* x will get nill. */
if (emit_byte_instruction (hcl, HCL_CODE_PUSH_NIL, HCL_NULL) <= -1) return -1;
if (emit_byte_instruction (hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
/* TODO: study if supporting expression after break is good like return. (break (+ 10 20)) */
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction (hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_NULL) <= -1) return -1;
INSERT_CFRAME (hcl, i, COP_UPDATE_BREAK, HCL_SMOOI_TO_OOP(jump_inst_pos));
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_0, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
INSERT_CFRAME (hcl, i, COP_UPDATE_BREAK, cmd);
cf = GET_CFRAME(hcl, i);
cf->u._break.jump_inst_pos = jump_inst_pos;
POP_CFRAME (hcl);
return 0;
}
}
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "break outside loop");
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "%.*js outside loop", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
static int compile_continue (hcl_t* hcl, hcl_cnode_t* src)
{
/* (continue) */
hcl_cnode_t* cmd, * obj;
hcl_ooi_t i;
HCL_ASSERT (hcl, HCL_CNODE_IS_CONS(src));
HCL_ASSERT (hcl, HCL_CNODE_IS_SYMBOL_SYNCODED(HCL_CNODE_CONS_CAR(src), HCL_SYNCODE_CONTINUE));
cmd = HCL_CNODE_CONS_CAR(src);
obj = HCL_CNODE_CONS_CDR(src);
if (obj)
{
if (HCL_CNODE_IS_CONS(obj))
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_ARGCOUNT, HCL_CNODE_GET_LOC(obj), HCL_NULL, "redundant argument in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
}
else
{
hcl_setsynerrbfmt (hcl, HCL_SYNERR_DOTBANNED, HCL_CNODE_GET_LOC(obj), HCL_CNODE_GET_TOK(obj), "redundant cdr in %.*js", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
}
return -1;
}
for (i = hcl->c->cfs2.top; i >= 0; --i)
{
const hcl_cframe2_t* tcf;
tcf = &hcl->c->cfs2.ptr[i];
if (tcf->opcode == COP_EMIT_LAMBDA) break; /* seems to cross lambda boundary */
if (tcf->opcode == COP_POST_UNTIL_BODY || tcf->opcode == COP_POST_WHILE_BODY)
{
hcl_ooi_t jump_offset;
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_offset = hcl->code.bc.len - tcf->u.post_while.cond_pos + 1;
if (jump_offset > 3) jump_offset += HCL_HCL_CODE_LONG_PARAM_SIZE;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_BACKWARD_0, jump_offset, HCL_CNODE_GET_LOC(cmd)) <= -1) return -1;
POP_CFRAME (hcl);
return 0;
}
}
hcl_setsynerrbfmt (hcl, HCL_SYNERR_BREAK, HCL_CNODE_GET_LOC(src), HCL_NULL, "%.*js outside loop", HCL_CNODE_GET_TOKLEN(cmd), HCL_CNODE_GET_TOKPTR(cmd));
return -1;
}
@ -1579,6 +1633,11 @@ static int compile_cons_xlist_expression (hcl_t* hcl, hcl_cnode_t* obj)
if (compile_break(hcl, obj) <= -1) return -1;
break;
case HCL_SYNCODE_CONTINUE:
/* (continue)*/
if (compile_continue(hcl, obj) <= -1) return -1;
break;
case HCL_SYNCODE_DEFUN:
if (compile_lambda(hcl, obj, 1) <= -1) return -1;
break;
@ -1757,13 +1816,13 @@ static HCL_INLINE int compile_symbol (hcl_t* hcl, hcl_cnode_t* obj)
/* add the entire cons pair to the literal frame */
if (add_literal(hcl, cons, &index) <= -1 ||
emit_single_param_instruction(hcl, HCL_CODE_PUSH_OBJECT_0, index, HCL_NULL) <= -1) return -1;
emit_single_param_instruction(hcl, HCL_CODE_PUSH_OBJECT_0, index, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
return 0;
}
else
{
return emit_indexed_variable_access(hcl, index, HCL_CODE_PUSH_CTXTEMPVAR_0, HCL_CODE_PUSH_TEMPVAR_0, HCL_NULL);
return emit_indexed_variable_access(hcl, index, HCL_CODE_PUSH_CTXTEMPVAR_0, HCL_CODE_PUSH_TEMPVAR_0, HCL_CNODE_GET_LOC(obj));
}
}
@ -1836,7 +1895,7 @@ static HCL_INLINE int compile_dsymbol (hcl_t* hcl, hcl_cnode_t* obj)
}
if (add_literal(hcl, cons, &index) <= -1 ||
emit_single_param_instruction(hcl, HCL_CODE_PUSH_OBJECT_0, index, HCL_NULL) <= -1) return -1;
emit_single_param_instruction(hcl, HCL_CODE_PUSH_OBJECT_0, index, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
return 0;
}
@ -1955,15 +2014,15 @@ redo:
switch (HCL_CNODE_GET_TYPE(oprnd))
{
case HCL_CNODE_NIL:
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_NULL) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_NIL, HCL_CNODE_GET_LOC(oprnd)) <= -1) return -1;
goto done;
case HCL_CNODE_TRUE:
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_TRUE, HCL_NULL) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_TRUE, HCL_CNODE_GET_LOC(oprnd)) <= -1) return -1;
goto done;
case HCL_CNODE_FALSE:
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_FALSE, HCL_NULL) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_PUSH_FALSE, HCL_CNODE_GET_LOC(oprnd)) <= -1) return -1;
goto done;
case HCL_CNODE_CHARLIT:
@ -2197,7 +2256,7 @@ static int compile_object_list (hcl_t* hcl)
{
/* emit POP_STACKTOP before evaluating the second objects
* and onwards. this goes above COP_COMPILE_OBJECT */
PUSH_CFRAME (hcl, COP_EMIT_POP_STACKTOP, HCL_NULL);
PUSH_CFRAME (hcl, COP_EMIT_POP_STACKTOP, oprnd);
}
}
@ -2544,8 +2603,8 @@ static HCL_INLINE int subcompile_and_expr (hcl_t* hcl)
HCL_ASSERT (hcl, hcl->code.bc.len < HCL_SMOOI_MAX);
jump_inst_pos = hcl->code.bc.len;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_IF_FALSE, MAX_CODE_JUMP, HCL_NULL) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_NULL) <= -1) return -1;
if (emit_single_param_instruction(hcl, HCL_CODE_JUMP_FORWARD_IF_FALSE, MAX_CODE_JUMP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
if (emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(obj)) <= -1) return -1;
expr = HCL_CNODE_CONS_CAR(obj);
obj = HCL_CNODE_CONS_CDR(obj);
@ -2822,9 +2881,9 @@ static int update_break (hcl_t* hcl)
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_UPDATE_BREAK);
HCL_ASSERT (hcl, HCL_OOP_IS_SMOOI(cf->operand));
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
jip = HCL_OOP_TO_SMOOI(cf->operand);
jip = cf->u._break.jump_inst_pos;;
/* HCL_CODE_LONG_PARAM_SIZE + 1 => size of the long JUMP_FORWARD instruction */
jump_offset = hcl->code.bc.len - jip - (HCL_HCL_CODE_LONG_PARAM_SIZE + 1);
@ -3032,9 +3091,9 @@ static HCL_INLINE int emit_pop_stacktop (hcl_t* hcl)
cf = GET_TOP_CFRAME(hcl);
HCL_ASSERT (hcl, cf->opcode == COP_EMIT_POP_STACKTOP);
HCL_ASSERT (hcl, cf->operand == HCL_NULL);
HCL_ASSERT (hcl, cf->operand != HCL_NULL);
n = emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_NULL);
n = emit_byte_instruction(hcl, HCL_CODE_POP_STACKTOP, HCL_CNODE_GET_LOC(cf->operand));
POP_CFRAME (hcl);
return n;
@ -3080,7 +3139,7 @@ static HCL_INLINE int emit_set (hcl_t* hcl)
}
if (add_literal(hcl, cons, &index) <= -1 ||
emit_single_param_instruction(hcl, HCL_CODE_STORE_INTO_OBJECT_0, index, HCL_NULL) <= -1) return -1;
emit_single_param_instruction(hcl, HCL_CODE_STORE_INTO_OBJECT_0, index, HCL_CNODE_GET_LOC(cf->operand)) <= -1) return -1;
}
else
{

1
hcl/lib/gc.c
View File

@ -41,6 +41,7 @@ static struct
{
{ 3, { 'a','n','d' }, HCL_SYNCODE_AND, HCL_OFFSETOF(hcl_t,_and) },
{ 5, { 'b','r','e','a','k' }, HCL_SYNCODE_BREAK, HCL_OFFSETOF(hcl_t,_break) },
{ 8, { 'c','o','n','t','i','n','u','e' }, HCL_SYNCODE_CONTINUE, HCL_OFFSETOF(hcl_t,_continue) },
{ 5, { 'd','e','f','u','n' }, HCL_SYNCODE_DEFUN, HCL_OFFSETOF(hcl_t,_defun) },
{ 2, { 'd','o' }, HCL_SYNCODE_DO, HCL_OFFSETOF(hcl_t,_do) },
{ 4, { 'e','l','i','f' }, HCL_SYNCODE_ELIF, HCL_OFFSETOF(hcl_t,_elif) },

6
hcl/lib/hcl-prv.h
View File

@ -389,6 +389,12 @@ struct hcl_cframe2_t
{
int from_home;
} _return;
/* COP_UPDATE_BREAK */
struct
{
hcl_ooi_t jump_inst_pos;
} _break;
} u;
};
typedef struct hcl_cframe2_t hcl_cframe2_t;

2
hcl/lib/hcl.h
View File

@ -1450,6 +1450,7 @@ struct hcl_t
hcl_oop_t _and; /* symbol */
hcl_oop_t _break; /* symbol */
hcl_oop_t _continue; /* symbol */
hcl_oop_t _defun; /* symbol */
hcl_oop_t _do; /* symbol */
hcl_oop_t _elif; /* symbol */
@ -1710,6 +1711,7 @@ enum hcl_syncode_t
/* these enumerators can be set in the SYNCODE flags for a symbol */
HCL_SYNCODE_AND = 1,
HCL_SYNCODE_BREAK,
HCL_SYNCODE_CONTINUE,
HCL_SYNCODE_DEFUN,
HCL_SYNCODE_DO,
HCL_SYNCODE_ELIF,