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py: remove "if (0)" and "if (false)" branches. 

Prior to this commit, building the unix port with `DEBUG=1` and
`-finstrument-functions` the compilation would fail with an error like
"control reaches end of non-void function".  This change fixes this by
removing the problematic "if (0)" branches.  Not all branches affect
compilation, but they are all removed for consistency.
This commit is contained in:
Jun Wu 2019-05-04 20:29:43 -07:00 committed by Damien George
parent 32ba679924
commit 089c9b71d1
6 changed files with 24 additions and 30 deletions
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15
py/compile.c
View File

@ -3457,12 +3457,12 @@ mp_raw_code_t *mp_compile_to_raw_code(mp_parse_tree_t *parse_tree, qstr source_f
#endif
uint max_num_labels = 0;
for (scope_t *s = comp->scope_head; s != NULL && comp->compile_error == MP_OBJ_NULL; s = s->next) {
if (false) {
#if MICROPY_EMIT_INLINE_ASM
} else if (s->emit_options == MP_EMIT_OPT_ASM) {
if (s->emit_options == MP_EMIT_OPT_ASM) {
compile_scope_inline_asm(comp, s, MP_PASS_SCOPE);
} else
#endif
} else {
{
compile_scope(comp, s, MP_PASS_SCOPE);
// Check if any implicitly declared variables should be closed over
@ -3493,11 +3493,8 @@ mp_raw_code_t *mp_compile_to_raw_code(mp_parse_tree_t *parse_tree, qstr source_f
emit_t *emit_native = NULL;
#endif
for (scope_t *s = comp->scope_head; s != NULL && comp->compile_error == MP_OBJ_NULL; s = s->next) {
if (false) {
// dummy
#if MICROPY_EMIT_INLINE_ASM
} else if (s->emit_options == MP_EMIT_OPT_ASM) {
if (s->emit_options == MP_EMIT_OPT_ASM) {
// inline assembly
if (comp->emit_inline_asm == NULL) {
comp->emit_inline_asm = ASM_EMITTER(new)(max_num_labels);
@ -3519,9 +3516,9 @@ mp_raw_code_t *mp_compile_to_raw_code(mp_parse_tree_t *parse_tree, qstr source_f
if (comp->compile_error == MP_OBJ_NULL) {
compile_scope_inline_asm(comp, s, MP_PASS_EMIT);
}
} else
#endif
} else {
{
// choose the emit type

7
py/emitnative.c
View File

@ -2227,17 +2227,16 @@ STATIC void emit_native_binary_op(emit_t *emit, mp_binary_op_t op) {
int reg_rhs = REG_ARG_3;
emit_pre_pop_reg_flexible(emit, &vtype_rhs, &reg_rhs, REG_RET, REG_ARG_2);
emit_pre_pop_reg(emit, &vtype_lhs, REG_ARG_2);
if (0) {
// dummy
#if !(N_X64 || N_X86)
} else if (op == MP_BINARY_OP_LSHIFT) {
if (op == MP_BINARY_OP_LSHIFT) {
ASM_LSL_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
} else if (op == MP_BINARY_OP_RSHIFT) {
ASM_ASR_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
} else
#endif
} else if (op == MP_BINARY_OP_OR) {
if (op == MP_BINARY_OP_OR) {
ASM_OR_REG_REG(emit->as, REG_ARG_2, reg_rhs);
emit_post_push_reg(emit, VTYPE_INT, REG_ARG_2);
} else if (op == MP_BINARY_OP_XOR) {

13
py/objarray.c
View File

@ -375,9 +375,8 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
return MP_OBJ_NULL; // op not supported
} else {
mp_obj_array_t *o = MP_OBJ_TO_PTR(self_in);
if (0) {
#if MICROPY_PY_BUILTINS_SLICE
} else if (mp_obj_is_type(index_in, &mp_type_slice)) {
if (mp_obj_is_type(index_in, &mp_type_slice)) {
mp_bound_slice_t slice;
if (!mp_seq_get_fast_slice_indexes(o->len, index_in, &slice)) {
mp_raise_NotImplementedError("only slices with step=1 (aka None) are supported");
@ -456,22 +455,22 @@ STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value
mp_obj_array_t *res;
size_t sz = mp_binary_get_size('@', o->typecode & TYPECODE_MASK, NULL);
assert(sz > 0);
if (0) {
// dummy
#if MICROPY_PY_BUILTINS_MEMORYVIEW
} else if (o->base.type == &mp_type_memoryview) {
if (o->base.type == &mp_type_memoryview) {
res = m_new_obj(mp_obj_array_t);
*res = *o;
res->memview_offset += slice.start;
res->len = slice.stop - slice.start;
} else
#endif
} else {
{
res = array_new(o->typecode, slice.stop - slice.start);
memcpy(res->items, (uint8_t*)o->items + slice.start * sz, (slice.stop - slice.start) * sz);
}
return MP_OBJ_FROM_PTR(res);
} else
#endif
} else {
{
size_t index = mp_get_index(o->base.type, o->len, index_in, false);
#if MICROPY_PY_BUILTINS_MEMORYVIEW
if (o->base.type == &mp_type_memoryview) {

6
py/objfun.c
View File

@ -458,13 +458,13 @@ STATIC mp_uint_t convert_obj_for_inline_asm(mp_obj_t obj) {
return (mp_uint_t)mp_obj_str_get_data(obj, &l);
} else {
mp_obj_type_t *type = mp_obj_get_type(obj);
if (0) {
#if MICROPY_PY_BUILTINS_FLOAT
} else if (type == &mp_type_float) {
if (type == &mp_type_float) {
// convert float to int (could also pass in float registers)
return (mp_int_t)mp_obj_float_get(obj);
} else
#endif
} else if (type == &mp_type_tuple || type == &mp_type_list) {
if (type == &mp_type_tuple || type == &mp_type_list) {
// pointer to start of tuple (could pass length, but then could use len(x) for that)
size_t len;
mp_obj_t *items;

6
py/objint_mpz.c
View File

@ -194,18 +194,18 @@ mp_obj_t mp_obj_int_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_i
return mp_obj_int_binary_op_extra_cases(op, lhs_in, rhs_in);
}
if (0) {
#if MICROPY_PY_BUILTINS_FLOAT
} else if (op == MP_BINARY_OP_TRUE_DIVIDE || op == MP_BINARY_OP_INPLACE_TRUE_DIVIDE) {
if (op == MP_BINARY_OP_TRUE_DIVIDE || op == MP_BINARY_OP_INPLACE_TRUE_DIVIDE) {
if (mpz_is_zero(zrhs)) {
goto zero_division_error;
}
mp_float_t flhs = mpz_as_float(zlhs);
mp_float_t frhs = mpz_as_float(zrhs);
return mp_obj_new_float(flhs / frhs);
} else
#endif
} else if (op >= MP_BINARY_OP_INPLACE_OR && op < MP_BINARY_OP_CONTAINS) {
if (op >= MP_BINARY_OP_INPLACE_OR && op < MP_BINARY_OP_CONTAINS) {
mp_obj_int_t *res = mp_obj_int_new_mpz();
switch (op) {

7
py/runtime.c
View File

@ -1049,14 +1049,13 @@ void mp_load_method_maybe(mp_obj_t obj, qstr attr, mp_obj_t *dest) {
mp_obj_type_t *type = mp_obj_get_type(obj);
// look for built-in names
if (0) {
#if MICROPY_CPYTHON_COMPAT
} else if (attr == MP_QSTR___class__) {
if (attr == MP_QSTR___class__) {
// a.__class__ is equivalent to type(a)
dest[0] = MP_OBJ_FROM_PTR(type);
} else
#endif
} else if (attr == MP_QSTR___next__ && type->iternext != NULL) {
if (attr == MP_QSTR___next__ && type->iternext != NULL) {
dest[0] = MP_OBJ_FROM_PTR(&mp_builtin_next_obj);
dest[1] = obj;