hyung-hwan/moo
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fixed the issue of a disappearing backward jump instruction in compile_braced_block()

Browse Source
This commit is contained in:
hyunghwan.chung 2019-08-05 16:01:40 +00:00
parent 5296cadde2
commit c299101781
1 changed files with 17 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
moo/lib/comp.c
View File

@ -4993,7 +4993,7 @@ static int compile_block_expression (moo_t* moo)
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK)
{
/* eliminate BCODE_POP_STACKTOP produced in the else block below
* becuase the non-steatemnt item is the last item before the closing bracket */
* because the non-steatemnt item is the last item before the closing bracket */
if (pop_stacktop_pos > 0) eliminate_instructions (moo, pop_stacktop_pos, cc->mth.code.len - 1);
break;
}
@ -5037,15 +5037,16 @@ static int compile_block_expression (moo_t* moo)
if (emit_byte_instruction(moo, BCODE_PUSH_NIL, TOKEN_LOC(moo)) <= -1) return -1;
}
#else
moo_oow_t pop_stacktop_pos = INVALID_IP; /* TODO: move this up */
code_start = cc->mth.code.len;
if (emit_byte_instruction(moo, BCODE_PUSH_NIL, TOKEN_LOC(moo)) <= -1) return -1;
pop_stacktop_pos = cc->mth.code.len;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, TOKEN_LOC(moo)) <= -1) return -1;
if (TOKEN_TYPE(moo) != MOO_IOTOK_RBRACK)
{
moo_oow_t pop_stacktop_pos;
pop_stacktop_pos = cc->mth.code.len;
if (emit_byte_instruction(moo, BCODE_POP_STACKTOP, TOKEN_LOC(moo)) <= -1) return -1;
do
{
int n;
@ -5080,7 +5081,7 @@ moo_oow_t pop_stacktop_pos = INVALID_IP; /* TODO: move this up */
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACK)
{
/* eliminate BCODE_POP_STACKTOP produced in the else block below
* becuase the non-stetment item is the last item before the closing bracket */
* becuase the non-statement item is the last item before the closing bracket */
if (pop_stacktop_pos != INVALID_IP)
{
eliminate_instructions (moo, pop_stacktop_pos, pop_stacktop_pos);
@ -5134,7 +5135,12 @@ moo_oow_t pop_stacktop_pos = INVALID_IP; /* TODO: move this up */
/*
if (cc->mth.code.len > 2 && cc->mth.code.len - 2 == code_start)
{
if (cc->mth.code.ptr[code_start] == BCODE_PUSH_NIL
if (cc->mth.code.ptr[code_start] == BCODE_PUSH_NIL &&
cc->mth.code.ptr[code_start + 1] == BCODE_POP_STACKTOP &&
no goto found... <--- it's a bit tricy since goto can be inside other expressions like 'if' expression.
{
eliminate_instructions(moo, code_start, code_start + 2);
}
}*/
#endif
@ -6189,7 +6195,7 @@ static int compile_braced_block (moo_t* moo)
/* non-statement followed by the closing brace.
* if there is a statement above the non-statement item, the POP_STACKSTOP is produced.
* it should be eliminated since the block should return the last evalulated value */
if (pop_stacktop_pos > 0) eliminate_instructions (moo, pop_stacktop_pos, cc->mth.code.len - 1);
if (pop_stacktop_pos > 0) eliminate_instructions (moo, pop_stacktop_pos, pop_stacktop_pos);
break;
}
}
@ -6198,7 +6204,7 @@ static int compile_braced_block (moo_t* moo)
/* goto statement */
if (TOKEN_TYPE(moo) == MOO_IOTOK_RBRACE)
{
if (pop_stacktop_pos > 0) eliminate_instructions (moo, pop_stacktop_pos, cc->mth.code.len - 1);
if (pop_stacktop_pos > 0) eliminate_instructions (moo, pop_stacktop_pos, pop_stacktop_pos);
break;
}
else if (TOKEN_TYPE(moo) == MOO_IOTOK_PERIOD)
@ -6820,7 +6826,7 @@ static MOO_INLINE int resolve_goto_label (moo_t* moo, moo_goto_t* _goto)
moo_oocs_t gtname;
moo_label_t* _label;
gtname.ptr = (const moo_ooch_t*)(_goto + 1);
gtname.ptr = (moo_ooch_t*)(_goto + 1);
_label = cc->mth._label;
while (_label)
{
@ -6838,6 +6844,7 @@ static MOO_INLINE int resolve_goto_label (moo_t* moo, moo_goto_t* _goto)
MOO_ASSERT (moo, _goto->ip != INVALID_IP);
MOO_ASSERT (moo, _goto->ip != _label->ip);
if (patch_forward_jump_instruction(moo, _goto->ip, _label->ip, &_goto->loc) <= -1) return -1;
return 0;
}