210 lines
7.9 KiB
C++
210 lines
7.9 KiB
C++
/** @file MachPipeline.hpp
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*
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* Author: Roland Conybeare
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**/
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#pragma once
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//#include <cstdint>
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#include "xo/refcnt/Refcounted.hpp"
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#include "IrPipeline.hpp"
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#include "LlvmContext.hpp"
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#include "Jit.hpp"
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#include "activation_record.hpp"
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#include "xo/expression/Expression.hpp"
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#include "xo/expression/ConstantInterface.hpp"
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#include "xo/expression/PrimitiveInterface.hpp"
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#include "xo/expression/Apply.hpp"
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#include "xo/expression/Lambda.hpp"
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#include "xo/expression/Variable.hpp"
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#include "xo/expression/IfExpr.hpp"
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/* stuff from kaleidoscope.cpp */
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#include "llvm/ADT/APFloat.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/IR/BasicBlock.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/IR/Type.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/Passes/PassBuilder.h"
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#include "llvm/Passes/StandardInstrumentations.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Transforms/InstCombine/InstCombine.h"
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#include "llvm/Transforms/Scalar.h"
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#include "llvm/Transforms/Scalar/GVN.h"
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#include "llvm/Transforms/Scalar/Reassociate.h"
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#include "llvm/Transforms/Scalar/SimplifyCFG.h"
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namespace xo {
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namespace jit {
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/** @class MachPipeline
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* @brief just-in-time compiler for EGAD
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*
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* TODO: make module name a parameter?
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**/
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class MachPipeline : public ref::Refcount {
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public:
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using Expression = xo::ast::Expression;
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using Lambda = xo::ast::Lambda;
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using TypeDescr = xo::reflect::TypeDescr;
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//using ConstantInterface = xo::ast::ConstantInterface;
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public:
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/* tracking KaleidoscopeJIT::Create() here.. */
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static llvm::Expected<std::unique_ptr<MachPipeline>> make_aux();
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static xo::ref::rp<MachPipeline> make();
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// ----- module access -----
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llvm::Module * current_module() { return llvm_module_.get(); }
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ref::brw<LlvmContext> llvm_cx() { return llvm_cx_; }
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llvm::IRBuilder<> * llvm_current_ir_builder() { return llvm_toplevel_ir_builder_.get(); }
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/** target triple = string describing target host for codegen **/
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const std::string & target_triple() const;
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/** append function names defined in attached module to *p_v
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*
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* (RC 15jun2024 - this part is working)
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**/
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std::vector<std::string> get_function_name_v();
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/** write state of execution session (all the associated dynamic libraries) **/
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void dump_execution_session();
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// ----- code generation -----
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llvm::Value * codegen_constant(ref::brw<xo::ast::ConstantInterface> expr);
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llvm::Function * codegen_primitive(ref::brw<xo::ast::PrimitiveInterface> expr);
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llvm::Value * codegen_apply(ref::brw<xo::ast::Apply> expr, llvm::IRBuilder<> & ir_builder);
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/* NOTE: codegen_lambda() needs to be reentrant too.
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* for example can have a lambda in apply position.
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*/
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llvm::Function * codegen_lambda_decl(ref::brw<xo::ast::Lambda> expr);
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llvm::Function * codegen_lambda_defn(ref::brw<xo::ast::Lambda> expr, llvm::IRBuilder<> & ir_builder);
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llvm::Value * codegen_variable(ref::brw<xo::ast::Variable> var, llvm::IRBuilder<> & ir_builder);
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llvm::Value * codegen_ifexpr(ref::brw<xo::ast::IfExpr> ifexpr, llvm::IRBuilder<> & ir_builder);
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llvm::Value * codegen(ref::brw<Expression> expr, llvm::IRBuilder<> & ir_builder);
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llvm::Value * codegen_toplevel(ref::brw<Expression> expr);
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// ----- jit online execution -----
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/** add IR code in current module to JIT,
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* so that its available for execution
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**/
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void machgen_current_module();
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/** dump text description of module contents to console **/
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void dump_current_module();
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/** report mangle symbol **/
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std::string mangle(const std::string & x) const;
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/** lookup symbol in jit-associated output library **/
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llvm::Expected<llvm::orc::ExecutorAddr> lookup_symbol(const std::string & x);
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virtual void display(std::ostream & os) const;
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virtual std::string display_string() const;
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private:
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/** construct instance, adopting jit for compilation+execution **/
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explicit MachPipeline(std::unique_ptr<Jit> jit);
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/** iniitialize native builder (i.e. for platform we're running on) **/
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static void init_once();
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/** helper function. find all lambda expressions in AST @p expr **/
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std::vector<ref::brw<Lambda>> find_lambdas(ref::brw<Expression> expr) const;
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public:
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/** codegen helper for a user-defined function (codegen_lambda()):
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* create stack slot on behalf of some formal parameter to a function,
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* so we can avoid SSA restriction on function body
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*
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* @p var_type. variable type
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**/
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llvm::AllocaInst * create_entry_block_alloca(llvm::Function * llvm_fn,
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const std::string & var_name,
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TypeDescr var_type);
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private:
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/** (re)create pipeline to turn expressions into llvm IR code **/
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void recreate_llvm_ir_pipeline();
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private:
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// ----- this part adapted from LLVM 19.0 KaleidoscopeJIT.hpp [wip] -----
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/** just-in-time compiler -- construct machine code that can
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* be invoked from this running process
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**/
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std::unique_ptr<Jit> jit_;
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// ----- this part adapted from kaleidoscope.cpp -----
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public:
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/** everything below represents a pipeline
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* that takes expressions, and turns them into llvm IR.
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*
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* llvm IR can be added to running JIT by calling
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* jit_->addModule()
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* Note that this makes the module itself unavailable to us
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**/
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xo::ref::rp<IrPipeline> ir_pipeline_;
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private:
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/** owns + manages core "global" llvm data,
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* including type- and constant- unique-ing tables.
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*
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* Not threadsafe, but ok to have multiple threads,
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* each with its own LLVMContext
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**/
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ref::rp<LlvmContext> llvm_cx_;
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/** builder for intermediate-representation objects **/
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std::unique_ptr<llvm::IRBuilder<>> llvm_toplevel_ir_builder_;
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/** a module (1:1 with library ?) being prepared by llvm.
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* IR-level -- does not contain machine code
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*
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* - function names are unique within a module.
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**/
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std::unique_ptr<llvm::Module> llvm_module_;
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/** map global names to functions/variables **/
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std::map<std::string, xo::ref::rp<Expression>> global_env_;
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public:
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/** map variable names (formal parameters) to
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* corresponding llvm IR.
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*
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* only supports one level atm (i.e. only top-level functions)
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*
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* All values live on the stack, so that we can evade single-assignment
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* restrictions.
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*
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* rhs identifies logical stack location of a variable
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**/
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std::stack<activation_record> env_stack_; /* <-> kaleidoscope NamedValues */
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}; /*MachPipeline*/
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inline std::ostream &
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operator<<(std::ostream & os, const MachPipeline & x) {
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x.display(os);
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return os;
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}
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} /*namespace jit*/
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} /*namespace xo*/
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/** end MachPipeline.hpp **/
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