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/*
* MRustC - Rust Compiler
* - By John Hodge (Mutabah/thePowersGang)
*
* mir/mir.hpp
* - MIR (Middle Intermediate Representation) definitions
*/
#pragma once
#include <tagged_union.hpp>
#include <vector>
#include <string>
#include <hir/type.hpp>
namespace MIR {
typedef unsigned int RegionId;
typedef unsigned int BasicBlockId;
// "LVALUE" - Assignable values
TAGGED_UNION_EX(LValue, (), Variable, (
// User-named variable
(Variable, unsigned int),
// Temporary with no user-defined name
(Temporary, struct {
unsigned int idx;
}),
// Function argument (matters for destructuring)
(Argument, struct {
unsigned int idx;
}),
// `static` or `static mut`
(Static, ::HIR::Path),
// Function return
(Return, struct{}),
// Field access (tuple, struct, tuple struct, enum field, ...)
// NOTE: Also used to index an array/slice by a compile-time known index (e.g. in destructuring)
(Field, struct {
::std::unique_ptr<LValue> val;
unsigned int field_index;
}),
// Dereference a value
(Deref, struct {
::std::unique_ptr<LValue> val;
}),
// Index an array or slice (typeof(val) == [T; n] or [T])
// NOTE: This is not bounds checked!
(Index, struct {
::std::unique_ptr<LValue> val;
::std::unique_ptr<LValue> idx;
}),
// Interpret an enum as a particular variant
(Downcast, struct {
::std::unique_ptr<LValue> val;
unsigned int variant_index;
})
), (),(), (
LValue clone() const;
)
);
extern ::std::ostream& operator<<(::std::ostream& os, const LValue& x);
enum class eBinOp
{
ADD, ADD_OV,
SUB, SUB_OV,
MUL, MUL_OV,
DIV, DIV_OV,
MOD,// MOD_OV,
BIT_OR,
BIT_AND,
BIT_XOR,
BIT_SHR,
BIT_SHL,
EQ, NE,
GT, GE,
LT, LE,
};
enum class eUniOp
{
INV,
NEG
};
// Compile-time known values
TAGGED_UNION(Constant, Int,
(Int, ::std::int64_t),
(Uint, ::std::uint64_t),
(Float, double),
(Bool, bool),
(Bytes, ::std::vector< ::std::uint8_t>), // Byte string
(StaticString, ::std::string), // String
(Const, struct { ::HIR::Path p; }), // `const`
(ItemAddr, ::HIR::Path) // address of a value
);
extern ::std::ostream& operator<<(::std::ostream& os, const Constant& v);
TAGGED_UNION(RValue, Use,
(Use, LValue),
(Constant, Constant),
(SizedArray, struct {
LValue val;
unsigned int count;
}),
(Borrow, struct {
RegionId region;
::HIR::BorrowType type;
LValue val;
}),
(Cast, struct {
LValue val;
::HIR::TypeRef type;
}),
(BinOp, struct {
LValue val_l;
eBinOp op;
LValue val_r;
}),
(UniOp, struct {
LValue val;
eUniOp op;
}),
(DstMeta, struct {
LValue val;
}),
(MakeDst, struct {
LValue ptr_val;
LValue meta_val;
}),
(Tuple, struct {
::std::vector<LValue> vals;
}),
(Array, struct {
::std::vector<LValue> vals;
}),
(Struct, struct {
::HIR::GenericPath path;
::std::vector<LValue> vals;
})
);
extern ::std::ostream& operator<<(::std::ostream& os, const RValue& x);
TAGGED_UNION(Terminator, Incomplete,
(Incomplete, struct {}), // Block isn't complete (ERROR in output)
(Return, struct {}), // Return clealy to caller
(Diverge, struct {}), // Continue unwinding up the stack
(Goto, BasicBlockId), // Jump to another block
(Panic, struct { BasicBlockId dst; }), // ?
(If, struct {
LValue cond;
BasicBlockId bb0;
BasicBlockId bb1;
}),
(Switch, struct {
LValue val;
::std::vector<BasicBlockId> targets;
}),
(Call, struct {
BasicBlockId ret_block;
BasicBlockId panic_block;
LValue ret_val;
LValue fcn_val;
::std::vector<LValue> args;
})
);
extern ::std::ostream& operator<<(::std::ostream& os, const Terminator& x);
enum class eDropKind {
SHALLOW,
DEEP,
};
TAGGED_UNION(Statement, Assign,
(Assign, struct {
LValue dst;
RValue src;
}),
(Drop, struct {
eDropKind kind; // NOTE: For the `box` primitive
LValue slot;
})
);
struct BasicBlock
{
::std::vector<Statement> statements;
Terminator terminator;
};
class Function
{
public:
::std::vector< ::HIR::TypeRef> named_variables;
::std::vector< ::HIR::TypeRef> temporaries;
::std::vector<BasicBlock> blocks;
};
};
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