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py: Simplify bytecode prelude when encoding closed over variables.

This commit is contained in:
Damien George 2015-04-07 00:08:17 +01:00
parent 78772ada0d
commit c9aa1883ed
5 changed files with 8 additions and 27 deletions
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7
py/bc.c
View File

@ -228,9 +228,10 @@ continue2:;
// bytecode prelude: initialise closed over variables
const byte *ip = code_state->ip;
for (mp_uint_t n_local = *ip++; n_local > 0; n_local--) {
mp_uint_t local_num = *ip++;
code_state->state[n_state - 1 - local_num] = mp_obj_new_cell(code_state->state[n_state - 1 - local_num]);
mp_uint_t local_num;
while ((local_num = *ip++) != 255) {
code_state->state[n_state - 1 - local_num] =
mp_obj_new_cell(code_state->state[n_state - 1 - local_num]);
}
// now that we skipped over the prelude, set the ip for the VM

11
py/emitbc.c
View File

@ -322,21 +322,14 @@ void mp_emit_bc_start_pass(emit_t *emit, pass_kind_t pass, scope_t *scope) {
}
// bytecode prelude: initialise closed over variables
int num_cell = 0;
for (int i = 0; i < scope->id_info_len; i++) {
id_info_t *id = &scope->id_info[i];
if (id->kind == ID_INFO_KIND_CELL) {
num_cell += 1;
}
}
assert(num_cell <= 255);
emit_write_bytecode_byte(emit, num_cell); // write number of locals that are cells
for (int i = 0; i < scope->id_info_len; i++) {
id_info_t *id = &scope->id_info[i];
if (id->kind == ID_INFO_KIND_CELL) {
assert(id->local_num < 255);
emit_write_bytecode_byte(emit, id->local_num); // write the local which should be converted to a cell
}
}
emit_write_bytecode_byte(emit, 255); // end of list sentinel
}
void mp_emit_bc_end_pass(emit_t *emit) {

6
py/showbc.c
View File

@ -95,10 +95,8 @@ void mp_bytecode_print(const void *descr, mp_uint_t n_total_args, const byte *ip
// bytecode prelude: initialise closed over variables
{
uint n_local = *ip++;
printf("(NUM_LOCAL %u)\n", n_local);
for (; n_local > 0; n_local--) {
uint local_num = *ip++;
uint local_num;
while ((local_num = *ip++) != 255) {
printf("(INIT_CELL %u)\n", local_num);
}
len -= ip - mp_showbc_code_start;

10
tests/cmdline/cmd_showbc.py.exp
View File

@ -5,7 +5,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names:
(N_STATE 3)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-3 line=1
########
bc=\\d\+ line=134
@ -32,7 +31,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names:
(N_STATE 25)
(N_EXC_STACK 2)
(NUM_LOCAL 3)
(INIT_CELL 14)
(INIT_CELL 15)
(INIT_CELL 16)
@ -304,7 +302,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names: a
(N_STATE 5)
(N_EXC_STACK 0)
(NUM_LOCAL 1)
(INIT_CELL 0)
########
bc=\\d\+ line=124
@ -323,7 +320,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names:
(N_STATE 2)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-3 line=1
bc=0 line=129
bc=3 line=130
@ -348,7 +344,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names:
(N_STATE 1)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-3 line=1
bc=10 line=135
00 LOAD_NAME __name__ (cache=0)
@ -364,7 +359,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names: c e
(N_STATE 6)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-\\d\+ line=1
00 LOAD_FAST 2
01 FOR_ITER 17
@ -384,7 +378,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names: c e
(N_STATE 7)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-\\d\+ line=1
00 BUILD_LIST 0
02 LOAD_FAST 2
@ -403,7 +396,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names: c e
(N_STATE 8)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-\\d\+ line=1
########
00 BUILD_MAP 0
@ -424,7 +416,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names: x
(N_STATE 4)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-\\d\+ line=1
########
bc=\\d\+ line=105
@ -444,7 +435,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names: b a
(N_STATE 4)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-\\d\+ line=1
########
bc=\\d\+ line=125

1
tests/cmdline/cmd_verbose.py.exp
View File

@ -7,7 +7,6 @@ Raw bytecode (code_info_size=\\d\+, bytecode_size=\\d\+):
arg names:
(N_STATE 2)
(N_EXC_STACK 0)
(NUM_LOCAL 0)
bc=-3 line=1
bc=0 line=3
00 LOAD_NAME print (cache=0)