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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* mir/helpers.hpp
* - MIR Manipulation helpers
*/
#include "helpers.hpp"
#include <hir/hir.hpp>
#include <hir/type.hpp>
#include <mir/mir.hpp>
void ::MIR::TypeResolve::print_msg(const char* tag, ::std::function<void(::std::ostream& os)> cb) const
{
auto& os = ::std::cerr;
os << "MIR " << tag << ": " << this->m_path << " BB" << this->bb_idx << "/";
if( this->stmt_idx == STMT_TERM ) {
os << "TERM";
}
else {
os << this->stmt_idx;
}
os << ": ";
cb(os);
os << ::std::endl;
throw CheckFailure {};
}
const ::MIR::BasicBlock& ::MIR::TypeResolve::get_block(::MIR::BasicBlockId id) const
{
MIR_ASSERT(*this, id < m_fcn.blocks.size(), "Block ID " << id << " out of range");
return m_fcn.blocks[id];
}
const ::HIR::TypeRef& ::MIR::TypeResolve::get_static_type(::HIR::TypeRef& tmp, const ::HIR::Path& path) const
{
TU_MATCHA( (path.m_data), (pe),
(Generic,
MIR_ASSERT(*this, pe.m_params.m_types.empty(), "Path params on static");
const auto& s = m_crate.get_static_by_path(sp, pe.m_path);
return s.m_type;
),
(UfcsKnown,
MIR_TODO(*this, "LValue::Static - UfcsKnown - " << path);
),
(UfcsUnknown,
MIR_BUG(*this, "Encountered UfcsUnknown in LValue::Static - " << path);
),
(UfcsInherent,
MIR_TODO(*this, "LValue::Static - UfcsInherent - " << path);
)
)
throw "";
}
const ::HIR::TypeRef& ::MIR::TypeResolve::get_lvalue_type(::HIR::TypeRef& tmp, const ::MIR::LValue& val) const
{
TU_MATCH(::MIR::LValue, (val), (e),
(Variable,
return m_fcn.named_variables.at(e);
),
(Temporary,
return m_fcn.temporaries.at(e.idx);
),
(Argument,
return m_args.at(e.idx).second;
),
(Static,
return get_static_type(tmp, e);
),
(Return,
return m_ret_type;
),
(Field,
const auto& ty = this->get_lvalue_type(tmp, *e.val);
TU_MATCH_DEF( ::HIR::TypeRef::Data, (ty.m_data), (te),
(
MIR_BUG(*this, "Field access on unexpected type - " << ty);
),
// Array and Slice use LValue::Field when the index is constant and known-good
(Array,
return *te.inner;
),
(Slice,
return *te.inner;
),
(Tuple,
MIR_ASSERT(*this, e.field_index < te.size(), "Field index out of range in tuple " << e.field_index << " >= " << te.size());
return te[e.field_index];
),
(Path,
MIR_ASSERT(*this, te.binding.is_Struct(), "Field on non-Struct - " << ty);
const auto& str = *te.binding.as_Struct();
TU_MATCHA( (str.m_data), (se),
(Unit,
MIR_BUG(*this, "Field on unit-like struct - " << ty);
),
(Tuple,
MIR_ASSERT(*this, e.field_index < se.size(), "Field index out of range in tuple-struct " << te.path);
const auto& fld = se[e.field_index];
if( monomorphise_type_needed(fld.ent) ) {
tmp = monomorphise_type(sp, str.m_params, te.path.m_data.as_Generic().m_params, fld.ent);
m_resolve.expand_associated_types(sp, tmp);
return tmp;
}
else {
return fld.ent;
}
),
(Named,
MIR_ASSERT(*this, e.field_index < se.size(), "Field index out of range in struct " << te.path);
const auto& fld = se[e.field_index].second;
if( monomorphise_type_needed(fld.ent) ) {
tmp = monomorphise_type(sp, str.m_params, te.path.m_data.as_Generic().m_params, fld.ent);
m_resolve.expand_associated_types(sp, tmp);
return tmp;
}
else {
return fld.ent;
}
)
)
)
)
),
(Deref,
const auto& ty = this->get_lvalue_type(tmp, *e.val);
TU_MATCH_DEF( ::HIR::TypeRef::Data, (ty.m_data), (te),
(
MIR_BUG(*this, "Deref on unexpected type - " << ty);
),
(Path,
if( const auto* inner_ptr = this->is_type_owned_box(ty) )
{
return *inner_ptr;
}
else {
MIR_BUG(*this, "Deref on unexpected type - " << ty);
}
),
(Pointer,
return *te.inner;
),
(Borrow,
return *te.inner;
)
)
),
(Index,
const auto& ty = this->get_lvalue_type(tmp, *e.val);
TU_MATCH_DEF( ::HIR::TypeRef::Data, (ty.m_data), (te),
(
MIR_BUG(*this, "Index on unexpected type - " << ty);
),
(Slice,
return *te.inner;
),
(Array,
return *te.inner;
)
)
),
(Downcast,
const auto& ty = this->get_lvalue_type(tmp, *e.val);
TU_MATCH_DEF( ::HIR::TypeRef::Data, (ty.m_data), (te),
(
MIR_BUG(*this, "Downcast on unexpected type - " << ty);
),
(Path,
MIR_ASSERT(*this, te.binding.is_Enum() || te.binding.is_Union(), "Downcast on non-Enum");
if( te.binding.is_Enum() )
{
const auto& enm = *te.binding.as_Enum();
const auto& variants = enm.m_variants;
MIR_ASSERT(*this, e.variant_index < variants.size(), "Variant index out of range");
const auto& variant = variants[e.variant_index];
// TODO: Make data variants refer to associated types (unify enum and struct handling)
TU_MATCHA( (variant.second), (ve),
(Value,
),
(Unit,
),
(Tuple,
// HACK! Create tuple.
::std::vector< ::HIR::TypeRef> tys;
for(const auto& fld : ve)
tys.push_back( monomorphise_type(sp, enm.m_params, te.path.m_data.as_Generic().m_params, fld.ent) );
tmp = ::HIR::TypeRef( mv$(tys) );
m_resolve.expand_associated_types(sp, tmp);
return tmp;
),
(Struct,
// HACK! Create tuple.
::std::vector< ::HIR::TypeRef> tys;
for(const auto& fld : ve)
tys.push_back( monomorphise_type(sp, enm.m_params, te.path.m_data.as_Generic().m_params, fld.second.ent) );
tmp = ::HIR::TypeRef( mv$(tys) );
m_resolve.expand_associated_types(sp, tmp);
return tmp;
)
)
}
else
{
const auto& unm = *te.binding.as_Union();
MIR_ASSERT(*this, e.variant_index < unm.m_variants.size(), "Variant index out of range");
const auto& variant = unm.m_variants[e.variant_index];
const auto& var_ty = variant.second.ent;
if( monomorphise_type_needed(var_ty) ) {
tmp = monomorphise_type(sp, unm.m_params, te.path.m_data.as_Generic().m_params, variant.second.ent);
m_resolve.expand_associated_types(sp, tmp);
return tmp;
}
else {
return var_ty;
}
}
)
)
)
)
throw "";
}
const ::HIR::TypeRef* ::MIR::TypeResolve::is_type_owned_box(const ::HIR::TypeRef& ty) const
{
return m_resolve.is_type_owned_box(ty);
}
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