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py/compile: Extract parse-node kind at start of func for efficiency.

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Otherwise the type of parse-node and its kind has to be re-extracted
multiple times.  This optimisation reduces code size by a bit (16 bytes on
bare-arm).
This commit is contained in:
Damien George 2017-04-22 14:23:47 +10:00
parent fa03bbf0fd
commit 40b40ffc98
1 changed files with 14 additions and 7 deletions
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21
py/compile.c
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@ -586,8 +586,16 @@ STATIC void close_over_variables_etc(compiler_t *comp, scope_t *this_scope, int
}
STATIC void compile_funcdef_lambdef_param(compiler_t *comp, mp_parse_node_t pn) {
if (MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_typedargslist_star)
|| MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_varargslist_star)) {
// For efficiency of the code below we extract the parse-node kind here
int pn_kind;
if (MP_PARSE_NODE_IS_ID(pn)) {
pn_kind = -1;
} else {
assert(MP_PARSE_NODE_IS_STRUCT(pn));
pn_kind = MP_PARSE_NODE_STRUCT_KIND((mp_parse_node_struct_t*)pn);
}
if (pn_kind == PN_typedargslist_star || pn_kind == PN_varargslist_star) {
comp->have_star = true;
/* don't need to distinguish bare from named star
mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn;
@ -598,8 +606,7 @@ STATIC void compile_funcdef_lambdef_param(compiler_t *comp, mp_parse_node_t pn)
}
*/
} else if (MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_typedargslist_dbl_star)
|| MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_varargslist_dbl_star)) {
} else if (pn_kind == PN_typedargslist_dbl_star || pn_kind == PN_varargslist_dbl_star) {
// named double star
// TODO do we need to do anything with this?
@ -607,14 +614,14 @@ STATIC void compile_funcdef_lambdef_param(compiler_t *comp, mp_parse_node_t pn)
mp_parse_node_t pn_id;
mp_parse_node_t pn_colon;
mp_parse_node_t pn_equal;
if (MP_PARSE_NODE_IS_ID(pn)) {
if (pn_kind == -1) {
// this parameter is just an id
pn_id = pn;
pn_colon = MP_PARSE_NODE_NULL;
pn_equal = MP_PARSE_NODE_NULL;
} else if (MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_typedargslist_name)) {
} else if (pn_kind == PN_typedargslist_name) {
// this parameter has a colon and/or equal specifier
mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn;
@ -623,7 +630,7 @@ STATIC void compile_funcdef_lambdef_param(compiler_t *comp, mp_parse_node_t pn)
pn_equal = pns->nodes[2];
} else {
assert(MP_PARSE_NODE_IS_STRUCT_KIND(pn, PN_varargslist_name)); // should be
assert(pn_kind == PN_varargslist_name); // should be
// this parameter has an equal specifier
mp_parse_node_struct_t *pns = (mp_parse_node_struct_t*)pn;