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//
//
//
#include <iostream>
#include "module_tree.hpp"
#include "value.hpp"
#include <algorithm>
#include <iomanip>
#pragma warning( error : 4061)
struct ProgramOptions
{
::std::string infile;
int parse(int argc, const char* argv[]);
};
Value MIRI_Invoke(const ModuleTree& modtree, ::HIR::Path path, ::std::vector<Value> args);
int main(int argc, const char* argv[])
{
ProgramOptions opts;
if( opts.parse(argc, argv) )
{
return 1;
}
auto tree = ModuleTree {};
tree.load_file(opts.infile);
auto rv = MIRI_Invoke(tree, tree.find_lang_item("start"), {});
::std::cout << rv << ::std::endl;
return 0;
}
Value MIRI_Invoke(const ModuleTree& modtree, ::HIR::Path path, ::std::vector<Value> args)
{
const auto& fcn = modtree.get_function(path);
::std::vector<bool> drop_flags = fcn.m_mir.drop_flags;
::std::vector<Value> locals; locals.reserve( fcn.m_mir.locals.size() );
Value ret_val = Value(fcn.ret_ty);
for(const auto& ty : fcn.m_mir.locals)
{
locals.push_back(Value(ty));
}
struct State
{
const Function& fcn;
Value ret;
::std::vector<Value> args;
::std::vector<Value> locals;
State(const Function& fcn, ::std::vector<Value> args):
fcn(fcn),
ret(fcn.ret_ty),
args(::std::move(args))
{
locals.reserve(fcn.m_mir.locals.size());
for(const auto& ty : fcn.m_mir.locals)
{
locals.push_back(Value(ty));
}
}
Value& get_value_type_and_ofs(const ::MIR::LValue& lv, size_t& ofs, ::HIR::TypeRef& ty)
{
switch(lv.tag())
{
TU_ARM(lv, Return, _e) {
ofs = 0;
ty = fcn.ret_ty;
return ret;
} break;
TU_ARM(lv, Local, e) {
ofs = 0;
ty = fcn.m_mir.locals.at(e);
return locals.at(e);
} break;
TU_ARM(lv, Argument, e) {
ofs = 0;
ty = fcn.args.at(e.idx);
return args.at(e.idx);
} break;
TU_ARM(lv, Index, e) {
auto idx = read_lvalue(*e.idx).as_usize();
::HIR::TypeRef array_ty;
auto& base_val = get_value_type_and_ofs(*e.val, ofs, array_ty);
if( array_ty.wrappers.empty() )
throw "ERROR";
if( array_ty.wrappers.front().type == TypeWrapper::Ty::Array )
{
ty = array_ty.get_inner();
ofs += ty.get_size() * idx;
return base_val;
}
else if( array_ty.wrappers.front().type == TypeWrapper::Ty::Slice )
{
throw "TODO";
}
else
{
throw "ERROR";
}
} break;
TU_ARM(lv, Field, e) {
::HIR::TypeRef composite_ty;
auto& base_val = get_value_type_and_ofs(*e.val, ofs, composite_ty);
::std::cout << "get_type_and_ofs: " << composite_ty << ::std::endl;
size_t inner_ofs;
ty = composite_ty.get_field(e.field_index, inner_ofs);
ofs += inner_ofs;
return base_val;
}
}
throw "";
}
::HIR::TypeRef get_lvalue_ty(const ::MIR::LValue& lv)
{
::HIR::TypeRef ty;
size_t ofs = 0;
get_value_type_and_ofs(lv, ofs, ty);
return ty;
}
Value read_lvalue_with_ty(const ::MIR::LValue& lv, ::HIR::TypeRef& ty)
{
::std::cout << "read_lvalue_with_ty: " << lv << ::std::endl;
size_t ofs = 0;
Value& base_value = get_value_type_and_ofs(lv, ofs, ty);
::std::cout << "> read_lvalue_with_ty: " << ty << ::std::endl;
return base_value.read_value(ofs, ty.get_size());
}
Value read_lvalue(const ::MIR::LValue& lv)
{
::std::cout << "read_lvalue: " << lv << ::std::endl;
::HIR::TypeRef ty;
return read_lvalue_with_ty(lv, ty);
}
void write_lvalue(const ::MIR::LValue& lv, Value val)
{
::std::cout << "write_lvaue: " << lv << ::std::endl;
//::std::cout << "write_lvaue: " << lv << " = " << val << ::std::endl;
::HIR::TypeRef ty;
size_t ofs = 0;
Value& base_value = get_value_type_and_ofs(lv, ofs, ty);
base_value.write_value(ofs, val);
}
Value const_to_value(const ::MIR::Constant& c, ::HIR::TypeRef& ty)
{
switch(c.tag())
{
TU_ARM(c, Int, ce) {
ty = ::HIR::TypeRef(ce.t);
Value val = Value(ty);
val.write_bytes(0, &ce.v, ::std::min(ty.get_size(), sizeof(ce.v))); // TODO: Endian
// TODO: If the write was clipped, sign-extend
return val;
} break;
TU_ARM(c, Uint, ce) {
ty = ::HIR::TypeRef(ce.t);
Value val = Value(ty);
val.write_bytes(0, &ce.v, ::std::min(ty.get_size(), sizeof(ce.v))); // TODO: Endian
return val;
} break;
}
throw "";
}
Value const_to_value(const ::MIR::Constant& c)
{
::HIR::TypeRef ty;
return const_to_value(c, ty);
}
Value param_to_value(const ::MIR::Param& p, ::HIR::TypeRef& ty)
{
switch(p.tag())
{
TU_ARM(p, Constant, pe)
return const_to_value(pe, ty);
TU_ARM(p, LValue, pe)
return read_lvalue_with_ty(pe, ty);
}
throw "";
}
Value param_to_value(const ::MIR::Param& p)
{
::HIR::TypeRef ty;
return param_to_value(p, ty);
}
} state { fcn, ::std::move(args) };
size_t bb_idx = 0;
for(;;)
{
const auto& bb = fcn.m_mir.blocks.at(bb_idx);
for(const auto& stmt : bb.statements)
{
::std::cout << "BB" << bb_idx << "/" << (&stmt - bb.statements.data()) << ": " << stmt << ::std::endl;
switch(stmt.tag())
{
TU_ARM(stmt, Assign, se) {
Value val;
switch(se.src.tag())
{
TU_ARM(se.src, Use, re) {
state.write_lvalue(se.dst, state.read_lvalue(re));
} break;
TU_ARM(se.src, Constant, re) {
state.write_lvalue(se.dst, state.const_to_value(re));
} break;
TU_ARM(se.src, SizedArray, re) {
throw "TODO";
} break;
TU_ARM(se.src, Cast, re) {
throw "TODO";
} break;
TU_ARM(se.src, BinOp, re) {
throw "TODO";
} break;
TU_ARM(se.src, UniOp, re) {
throw "TODO";
} break;
TU_ARM(se.src, DstMeta, re) {
throw "TODO";
} break;
TU_ARM(se.src, DstPtr, re) {
throw "TODO";
} break;
TU_ARM(se.src, MakeDst, re) {
throw "TODO";
} break;
TU_ARM(se.src, Tuple, re) {
::HIR::TypeRef dst_ty;
size_t ofs = 0;
Value& base_value = state.get_value_type_and_ofs(se.dst, ofs, dst_ty);
for(size_t i = 0; i < re.vals.size(); i++)
{
auto fld_ofs = dst_ty.composite_type->fields.at(i).first;
base_value.write_value(ofs + fld_ofs, state.param_to_value(re.vals[i]));
}
} break;
TU_ARM(se.src, Array, re) {
throw "TODO";
} break;
TU_ARM(se.src, Variant, re) {
throw "TODO";
} break;
TU_ARM(se.src, Struct, re) {
throw "TODO";
} break;
}
} break;
case ::MIR::Statement::TAG_Asm:
throw "TODO";
break;
case ::MIR::Statement::TAG_Drop:
throw "TODO";
break;
case ::MIR::Statement::TAG_SetDropFlag:
throw "TODO";
break;
}
}
::std::cout << "BB" << bb_idx << "/TERM: " << bb.terminator << ::std::endl;
switch(bb.terminator.tag())
{
TU_ARM(bb.terminator, Goto, te)
bb_idx = te;
continue;
TU_ARM(bb.terminator, Return, _te)
return state.ret;
}
throw "";
}
throw "";
}
int ProgramOptions::parse(int argc, const char* argv[])
{
bool all_free = false;
for(int argidx = 1; argidx < argc; argidx ++)
{
const char* arg = argv[argidx];
if( arg[0] != '-' || all_free )
{
// Free
if( this->infile == "" )
{
this->infile = arg;
}
else
{
// TODO: Too many free arguments
}
}
else if( arg[1] != '-' )
{
// Short
}
else if( arg[2] != '\0' )
{
// Long
}
else
{
all_free = true;
}
}
return 0;
}
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