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[compiler] fix compile_condition not attempting macro expansion (#3030)

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Ancient bug! Resulted in a 1%-2% decrease in code object file size (and
more importantly the asm is more readable).

Fixes #3029
This commit is contained in:
ManDude
2023-09-25 23:49:12 +01:00
committed by GitHub
parent c695ef1393
commit 9b60afe6e6
2 changed files with 20 additions and 15 deletions
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goalc/compiler/compilation/ControlFlow.cpp
+9 -5
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@@ -40,21 +40,25 @@ Condition Compiler::compile_condition(const goos::Object& condition, Env* env, b
{">", ConditionKind::GT}, {"<", ConditionKind::LT},
{">=", ConditionKind::GEQ}, {"<=", ConditionKind::LEQ}};
// we may have gotten a macro as a condition, expand it first.
// note : use the `condition` arg for errors still so that the user can actually tell what code
// went wrong!
auto new_c = expand_macro_completely(condition, env);
// possibly a form with an optimizable condition?
if (condition.is_pair()) {
auto first = pair_car(condition);
auto rest = pair_cdr(condition);
if (new_c.is_pair()) {
auto& first = pair_car(new_c);
auto& rest = pair_cdr(new_c);
if (first.is_symbol()) {
auto fas = first.as_symbol();
// if there's a not, we can just try again to get an optimization with the invert flipped.
if (fas->name == "not") {
auto arg = pair_car(rest);
if (!pair_cdr(rest).is_empty_list()) {
throw_compiler_error(condition, "A condition with \"not\" can have only one argument");
}
return compile_condition(arg, env, !invert);
return compile_condition(pair_car(rest), env, !invert);
}
auto& conditions = invert ? conditions_inverted : conditions_normal;