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Store and reuse lowered parameter order (#6593)

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This resolves a longstanding TODO in `file_context.cpp`, and prepares
lowering to support compound return forms.
This commit is contained in:
Geoff Romer
2026-01-15 23:15:48 +00:00
committed by GitHub
parent de0ad6730f
commit 75713908f4
16 changed files with 788 additions and 613 deletions
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toolchain/sem_ir/function.cpp
-19
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@@ -112,25 +112,6 @@ auto DecomposeVirtualFunction(const File& sem_ir, InstId fn_decl_id,
.specific_id = specific_id};
}
auto Function::GetParamPatternInfoFromPatternId(const File& sem_ir,
InstId pattern_id)
-> std::optional<ParamPatternInfo> {
auto inst_id = pattern_id;
auto inst = sem_ir.insts().Get(inst_id);
sem_ir.insts().TryUnwrap(inst, inst_id, &VarPattern::subpattern_id);
auto [param_pattern, param_pattern_id] =
sem_ir.insts().TryUnwrap(inst, inst_id, &AnyParamPattern::subpattern_id);
if (!param_pattern) {
return std::nullopt;
}
auto binding_pattern = inst.As<AnyBindingPattern>();
return {{.inst_id = param_pattern_id,
.inst = *param_pattern,
.entity_name_id = binding_pattern.entity_name_id}};
}
auto Function::GetDeclaredReturnType(const File& file,
SpecificId specific_id) const -> TypeId {
if (!return_type_inst_id.has_value()) {