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add missing cases to retract_clause (#1214)

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This commit is contained in:
Mark Thom
2022-01-15 00:51:38 -07:00
parent f3e5f7879d
commit 06abe2302b
1 changed files with 90 additions and 33 deletions
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123
src/machine/compile.rs
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@@ -235,19 +235,20 @@ fn find_inner_choice_instr(code: &Code, mut index: usize, index_loc: usize) -> u
index = index_loc;
}
}
&Instruction::DynamicElse(_, _, next_or_fail) => match next_or_fail
{
NextOrFail::Next(i) => {
if i == 0 {
&Instruction::DynamicElse(_, _, next_or_fail) => {
match next_or_fail {
NextOrFail::Next(i) => {
if i == 0 {
index = index_loc;
} else {
return index;
}
}
NextOrFail::Fail(_) => {
index = index_loc;
} else {
return index;
}
}
NextOrFail::Fail(_) => {
index = index_loc;
}
},
}
&Instruction::DynamicInternalElse(_, _, next_or_fail) => {
match next_or_fail {
NextOrFail::Next(i) => {
@@ -1173,7 +1174,6 @@ fn append_compiled_clause(
{
Some(index_loc) if lower_bound_arg_num == target_arg_num => {
code.push(settings.internal_trust_me());
code.extend(clause_code.drain(3..)); // skip the indexing code
// set skeleton[target_pos].opt_arg_index_key to
@@ -1796,24 +1796,19 @@ impl<'a, LS: LoadState<'a>> Loader<'a, LS> {
let payload_compilation_target = self.payload.compilation_target;
let code_index = self.get_or_insert_code_index(key, payload_compilation_target);
let skeleton = match self
let skeleton = self
.wam_prelude
.indices
.get_predicate_skeleton_mut(&payload_compilation_target, &key)
{
Some(skeleton) => skeleton,
None => {
unreachable!();
}
};
.unwrap();
let code = &mut self.wam_prelude.code;
let lower_bound = lower_bound_of_target_clause(skeleton, target_pos);
let lower_bound_is_unindexed = !skeleton.clauses[lower_bound].opt_arg_index_key.is_some();
if target_pos == 0 || (lower_bound + 1 == target_pos && lower_bound_is_unindexed) {
// the clause preceding target_pos, if there is one, is of key type
// OptArgIndexKey::None.
// the clause preceding target_pos, if there is one, is of
// key type OptArgIndexKey::None.
match skeleton.clauses[target_pos]
.opt_arg_index_key
.switch_on_term_loc()
@@ -2024,29 +2019,91 @@ impl<'a, LS: LoadState<'a>> Loader<'a, LS> {
.switch_on_term_loc()
{
Some(index_loc) => {
let preceding_choice_instr_loc = find_inner_choice_instr(
let clause_start = find_inner_choice_instr(
code,
skeleton.clauses[target_pos - 1].clause_start,
skeleton.clauses[target_pos].clause_start,
index_loc,
);
remove_non_leading_clause(
code,
preceding_choice_instr_loc,
skeleton.clauses[target_pos].clause_start,
&mut self.payload.retraction_info,
);
let lower_bound_clause_start = skeleton.clauses[lower_bound].clause_start;
let preceding_choice_instr_loc;
match &mut code[preceding_choice_instr_loc] {
match &mut code[clause_start] {
Instruction::TryMeElse(0) => {
set_switch_var_offset(
preceding_choice_instr_loc = if skeleton.clauses[lower_bound]
.opt_arg_index_key
.is_some()
{
lower_bound_clause_start - 2
} else {
lower_bound_clause_start
};
remove_non_leading_clause(
code,
index_loc,
preceding_choice_instr_loc + 1 - index_loc,
preceding_choice_instr_loc,
skeleton.clauses[target_pos].clause_start - 2,
&mut self.payload.retraction_info,
);
}
_ => {}
Instruction::TryMeElse(_) => {
let new_target_loc = blunt_leading_choice_instr(
code,
clause_start,
&mut self.payload.retraction_info,
);
derelictize_try_me_else(
code,
clause_start,
&mut self.payload.retraction_info,
);
set_switch_var_offset(
code,
index_loc,
new_target_loc - index_loc,
&mut self.payload.retraction_info,
);
self.payload.retraction_info.push_record(
RetractionRecord::SkeletonClauseStartReplaced(
payload_compilation_target,
key,
target_pos + 1,
skeleton.clauses[target_pos + 1].clause_start,
),
);
skeleton.clauses[target_pos + 1].clause_start =
skeleton.clauses[target_pos].clause_start;
}
_ => {
preceding_choice_instr_loc = find_inner_choice_instr(
code,
skeleton.clauses[target_pos - 1].clause_start,
index_loc,
);
remove_non_leading_clause(
code,
preceding_choice_instr_loc,
skeleton.clauses[target_pos].clause_start,
&mut self.payload.retraction_info,
);
match &mut code[preceding_choice_instr_loc] {
Instruction::TryMeElse(0) => {
set_switch_var_offset(
code,
index_loc,
preceding_choice_instr_loc + 1 - index_loc,
&mut self.payload.retraction_info,
);
}
_ => {}
}
}
}
None