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py: Add "default" to switches to allow better code flow analysis.

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This helps compiler produce smaller code.  Saves 124 bytes on stmhal and
bare-arm.
This commit is contained in:
Damien George
2015-01-14 21:32:42 +00:00
parent 65ef6b768c
commit d2d64f00fb
7 changed files with 19 additions and 26 deletions
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8
py/parse.c
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@@ -456,11 +456,13 @@ mp_parse_node_t mp_parse(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, mp_p
}
break;
case RULE_ARG_RULE:
rule_or_no_other_choice:
push_rule(&parser, rule_src_line, rule, i + 1); // save this or-rule
push_rule_from_arg(&parser, rule->arg[i]); // push child of or-rule
goto next_rule;
default:
assert(0);
goto rule_or_no_other_choice; // to help flow control analysis
}
}
if ((rule->arg[i] & RULE_ARG_KIND_MASK) == RULE_ARG_TOK) {
@@ -520,14 +522,16 @@ mp_parse_node_t mp_parse(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, mp_p
}
}
break;
}
}
case RULE_ARG_RULE:
case RULE_ARG_OPT_RULE:
rule_and_no_other_choice:
push_rule(&parser, rule_src_line, rule, i + 1); // save this and-rule
push_rule_from_arg(&parser, rule->arg[i]); // push child of and-rule
goto next_rule;
default:
assert(0);
goto rule_and_no_other_choice; // to help flow control analysis
}
}
@@ -674,11 +678,13 @@ mp_parse_node_t mp_parse(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, mp_p
}
break;
case RULE_ARG_RULE:
rule_list_no_other_choice:
push_rule(&parser, rule_src_line, rule, i + 1); // save this list-rule
push_rule_from_arg(&parser, arg); // push child of list-rule
goto next_rule;
default:
assert(0);
goto rule_list_no_other_choice; // to help flow control analysis
}
}
}