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Add 'xo-jit/' from commit '855887df71'

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git-subtree-dir: xo-jit
git-subtree-mainline: 35555df976
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This commit is contained in:
Roland Conybeare 2025-05-11 01:54:47 -05:00
commit 757dfed99c
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50
xo-jit/src/jit/CMakeLists.txt Normal file
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# jit/CMakeLists.txt
set(SELF_LIB xo_jit)
set(SELF_SRCS
LlvmContext.cpp
IrPipeline.cpp
MachPipeline.cpp
intrinsics.cpp
activation_record.cpp
type2llvm.cpp
)
xo_add_shared_library4(${SELF_LIB} ${PROJECT_NAME}Targets ${PROJECT_VERSION} 1 ${SELF_SRCS})
xo_dependency(${SELF_LIB} xo_expression)
find_package(LLVM REQUIRED CONFIG)
message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
message(STATUS "LLVM_DIR=${LLVM_DIR}")
message(STATUS "LLVM_DEFINITIONS=${LLVM_DEFINITIONS}")
message(STATUS "LLVM_INCLUDE_DIRS=[${LLVM_INCLUDE_DIRS}]")
separate_arguments(LLVM_DEFINITIONS_LIST NATIVE_COMMAND ${LLVM_DEFINITIONS})
message(STATUS "LLVM_DEFINITIONS_LIST=[${LLVM_DEFINITIONS_LIST}]")
# LLVM library directory
execute_process(
COMMAND llvm-config --libdir
COMMAND tr -d '\n'
OUTPUT_VARIABLE LLVM_LIBRARY_DIR
)
message(STATUS "LLVM_LIBRARY_DIR=[${LLVM_LIBRARY_DIR}]")
# Find the libraries that correspond to the LLVM components
execute_process(
COMMAND llvm-config --libs all
COMMAND tr -d '\n'
OUTPUT_VARIABLE LLVM_LIBS
)
message(STATUS "LLVM_LIBS=[${LLVM_LIBS}]")
target_include_directories(${SELF_LIB} PUBLIC ${LLVM_INCLUDE_DIRS})
target_compile_definitions(${SELF_LIB} PUBLIC ${LLVM_DEFINITIONS_LIST})
target_link_directories(${SELF_LIB} PUBLIC ${LLVM_LIBRARY_DIR})
target_link_libraries(${SELF_LIB} PUBLIC ${LLVM_LIBS})
# end CMakeLists.txt

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xo-jit/src/jit/IrPipeline.cpp Normal file
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/* @file IrPipeline.cpp */
#include "IrPipeline.hpp"
namespace xo {
namespace jit {
IrPipeline::IrPipeline(rp<LlvmContext> llvm_cx)
{
using std::make_unique;
this->llvm_cx_ = std::move(llvm_cx);
this->llvm_fpmgr_ = make_unique<llvm::FunctionPassManager>();
this->llvm_lamgr_ = std::make_unique<llvm::LoopAnalysisManager>();
this->llvm_famgr_ = std::make_unique<llvm::FunctionAnalysisManager>();
this->llvm_cgamgr_ = std::make_unique<llvm::CGSCCAnalysisManager>();
this->llvm_mamgr_ = std::make_unique<llvm::ModuleAnalysisManager>();
this->llvm_pic_ = std::make_unique<llvm::PassInstrumentationCallbacks>();
/* reference kept alive by @ref llvm_cx_ */
this->llvm_si_ = std::make_unique<llvm::StandardInstrumentations>(llvm_cx_->llvm_cx_ref(),
/*DebugLogging*/ true);
this->llvm_si_->registerCallbacks(*llvm_pic_, llvm_mamgr_.get());
/** transform passes **/
this->llvm_fpmgr_->addPass(llvm::InstCombinePass());
/* NOTE: llvm 19 adds mem2reg transform here.
* speculating that PromotePass() does same/goodenough thing in llvm 18.
* This pays off, works first try!
*/
this->llvm_fpmgr_->addPass(llvm::PromotePass());
this->llvm_fpmgr_->addPass(llvm::ReassociatePass());
this->llvm_fpmgr_->addPass(llvm::GVNPass());
this->llvm_fpmgr_->addPass(llvm::SimplifyCFGPass());
/** tracking for analysis passes that share info? **/
llvm::PassBuilder llvm_pass_builder;
llvm_pass_builder.registerModuleAnalyses(*llvm_mamgr_);
llvm_pass_builder.registerFunctionAnalyses(*llvm_famgr_);
llvm_pass_builder.crossRegisterProxies(*llvm_lamgr_, *llvm_famgr_, *llvm_cgamgr_, *llvm_mamgr_);
} /*ctor*/
void
IrPipeline::run_pipeline(llvm::Function & fn)
{
llvm_fpmgr_->run(fn, *llvm_famgr_);
} /*run_pipeline*/
} /*namespace jit*/
} /*namespace xo*/
/* end IrPipeline.cpp */

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/* @file Jit.cpp */
#include "Jit.hpp"
namespace xo {
namespace jit {
} /*namespace jit*/
} /*namespace xo*/
/* end Jit.cpp */

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xo-jit/src/jit/LlvmContext.cpp Normal file
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/* @file LlvmContext.cpp */
#include "LlvmContext.hpp"
namespace xo {
namespace jit {
rp<LlvmContext>
LlvmContext::make() {
return new LlvmContext();
}
LlvmContext::LlvmContext()
: llvm_cx_{std::make_unique<llvm::LLVMContext>()}
{}
} /*namespace jit*/
} /*namespace xo*/
/* end LlvmContext.cpp */

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xo-jit/src/jit/MachPipeline.cpp Normal file
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xo-jit/src/jit/MachPipeline.new.cpp Normal file
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xo-jit/src/jit/MachPipeline.orig.cpp Normal file
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xo-jit/src/jit/activation_record.cpp Normal file
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/* @file activation_record.cpp */
#include "activation_record.hpp"
#include "type2llvm.hpp"
#include "xo/indentlog/print/tag.hpp"
#include <iostream>
namespace xo {
namespace jit {
using std::cerr;
using std::endl;
activation_record::activation_record(const rp<Lambda> & lm)
: lambda_{lm},
binding_v_(lm->n_arg())
{
/* populate binding_v_ */
int n_arg = lm->n_arg();
binding_v_.resize(n_arg);
/* next slot# to use in explicit activation record */
int rt_env_slot = 0;
for (int i_arg = 0; i_arg < n_arg; ++i_arg) {
if (lm->is_captured(lm->i_argname(i_arg))) {
/* local param #i_arg needs a slot in explicit activation record */
binding_v_[i_arg] = runtime_binding_path::local(rt_env_slot);
++rt_env_slot;
} else {
binding_v_[i_arg] = runtime_binding_path::stackonly();
}
}
} /*ctor*/
const runtime_binding_detail *
activation_record::lookup_var(const std::string & x) const
{
constexpr bool c_debug_flag = true;
using xo::scope;
scope log(XO_DEBUG(c_debug_flag));
auto ix = frame_.find(x);
if (ix == frame_.end()) {
cerr << "activation_record::lookup_var: no binding for variable x"
<< xtag("x", x)
<< endl;
cerr << "frame:";
for (const auto & ix : frame_)
cerr << xtag("var", ix.first) << xtag("->", ix.second) << endl;
return nullptr;
}
return &(ix->second);
} /*lookup_var*/
const runtime_binding_detail *
activation_record::alloc_var(const std::string & x,
const runtime_binding_detail & binding)
{
constexpr bool c_debug_flag = true;
using xo::scope;
scope log(XO_DEBUG(c_debug_flag));
log && log(xtag("var", x),
xtag("binding", binding));
if (frame_.find(x) != frame_.end()) {
cerr << "activation_record::alloc_var: variable x already present in frame"
<< xtag("x", x)
<< endl;
return nullptr;
}
frame_[x] = binding;
return &(frame_[x]);
} /*alloc_var*/
/* in kaleidoscope7.cpp: CreateEntryBlockAlloca */
runtime_binding_detail
activation_record::create_entry_block_alloca(ref::brw<LlvmContext> llvm_cx,
//const llvm::DataLayout & data_layout,
llvm::Function * llvm_fn,
llvm::IRBuilder<> & fn_ir_builder,
int i_arg,
const std::string & var_name,
TypeDescr var_type)
{
constexpr bool c_debug_flag = true;
using xo::scope;
scope log(XO_DEBUG(c_debug_flag));
log && log(xtag("llvm_fn", (void*)llvm_fn),
xtag("i_arg", i_arg),
xtag("var_name", var_name),
xtag("var_type", var_type->short_name()));
llvm::Type * llvm_var_type = type2llvm::td_to_llvm_type(llvm_cx,
var_type);
log && log(xtag("addr(llvm_var_type)", (void*)llvm_var_type));
if (log) {
std::string llvm_var_type_str;
llvm::raw_string_ostream ss(llvm_var_type_str);
llvm_var_type->print(ss);
log(xtag("llvm_var_type", llvm_var_type_str));
}
if (!llvm_var_type)
return runtime_binding_detail{}; /*sentinel*/
llvm::AllocaInst * stackaddr = fn_ir_builder.CreateAlloca(llvm_var_type,
nullptr,
var_name);
log && log(xtag("alloca", (void*)stackaddr),
xtag("align", stackaddr->getAlign().value())
//xtag("size", retval->getAllocationSize(data_layout).value())
);
return {i_arg, stackaddr, llvm_var_type};
} /*create_entry_block_alloca*/
#ifdef NOT_USING
llvm::AllocaInst *
activation_record::create_runtime_localenv_alloca(ref::brw<LlvmContext> llvm_cx,
//const llvm::DataLayout & data_layout,
llvm::Function * llvm_fn,
llvm::IRBuilder<> & ir_builder)
{
constexpr bool c_debug_flag = true;
using xo::scope;
scope log(XO_DEBUG(c_debug_flag),
xtag("llvm_fn", (void*)llvm_fn));
llvm::StructType * localenv_llvm_type
= type2llvm::create_localenv_llvm_type(llvm_cx, lambda_.borrow());
if (!localenv_llvm_type)
return nullptr;
llvm::AllocaInst * retval = ir_builder.CreateAlloca(localenv_llvm_type,
nullptr /*ArraySize*/,
"_localenv");
log && log(xtag("alloca", (void*)retval),
xtag("align", retval->getAlign().value())
//xtag("size", retval->getAllocationSize(data_layout).value())
);
return retval;
} /*create_runtime_localenv_alloca*/
#endif
llvm::Value *
activation_record::runtime_localenv_slot_addr(ref::brw<LlvmContext> llvm_cx,
llvm::StructType * localenv_llvm_type,
llvm::AllocaInst * localenv_alloca,
int i_slot,
#ifdef NOT_HERE
llvm::Value * llvm_slot_value,
#endif
llvm::IRBuilder<> & tmp_ir_builder)
{
llvm::Value * i0_slot
= llvm::ConstantInt::get(llvm_cx->llvm_cx_ref(),
llvm::APInt(32 /*bits*/, 0));
llvm::Value * i32_slot
= llvm::ConstantInt::get(llvm_cx->llvm_cx_ref(),
llvm::APInt(32 /*bits*/,
i_slot /*value*/));
std::array<llvm::Value*, 2> index_v = {
{i0_slot, i32_slot /*environment slot #0*/}};
llvm::Value * llvm_localenv_slot_ptr
= tmp_ir_builder.CreateInBoundsGEP(localenv_llvm_type,
localenv_alloca,
index_v);
return llvm_localenv_slot_ptr;
#ifdef NOT_HERE
tmp_ir_builder.CreateStore(llvm_value, //llvm_0ptr,
llvm_parent_env_ptr);
#endif
} /*runtime_localenv_slot_addr*/
bool
activation_record::bind_locals(ref::brw<LlvmContext> llvm_cx,
//const llvm::DataLayout & data_layout,
llvm::Function * llvm_fn,
llvm::IRBuilder<> & ir_builder)
{
constexpr bool c_debug_flag = true;
using xo::scope;
scope log(XO_DEBUG(c_debug_flag),
xtag("lambda-name", lambda_->name()));
llvm::IRBuilder<> tmp_ir_builder(&llvm_fn->getEntryBlock(),
llvm_fn->getEntryBlock().begin());
/* 1st pass: handle stackonly variables
*
* We presume this must come first,
* for subsequent mem2reg optimization pass to consider
*/
{
int i_arg = 0;
for (auto & arg : llvm_fn->args()) {
if (i_arg == 0) {
/* 1st argument is injected environment pointer.
* we don't need that to be on the stack,
* since not modifiable and not user-referencable.
*/
} else {
std::string arg_name = std::string(arg.getName());
log && log("nested environment",
xtag("i", i_arg),
xtag("arg[i]", arg_name),
xtag("stackonly(i)", binding_v_[i_arg-1].is_stackonly()));
if (binding_v_[i_arg-1].is_stackonly()) {
/* stack location for arg[i] */
runtime_binding_detail binding
= create_entry_block_alloca(llvm_cx,
//data_layout,
llvm_fn,
tmp_ir_builder,
i_arg,
arg_name,
lambda_->fn_arg(i_arg-1));
if (!binding.llvm_addr_)
return false;
/* store on function entry
* see codegen_variable() for corresponding load
*/
ir_builder.CreateStore(&arg, binding.llvm_addr_);
/* remember stack location for reference + assignment
* in lambda body.
*
*/
this->alloc_var(arg_name, binding);
}
}
++i_arg;
}
}
/* REMINDER: all functions need to follow the closure pattern,
* to accomodate cases where we don't know until runtime
* what kind of function we are invoking.
*
* This means:
* - always represent function in IR by a closure-shaped object
*
* +-------+
* | o---------> native function
* +-------+
* | o---------> runtime localenv
* +-------+ (possibly nullptr)
*
* We hope to optimize away the closures in cases where we know
* their contents at compile time
*
*/
/* 2nd pass: handle captured formal parameters */
if (lambda_->needs_closure_flag()) {
llvm::StructType * localenv_llvm_type
= type2llvm::create_localenv_llvm_type(llvm_cx, lambda_.borrow());
#ifdef NOT_USING
llvm::PointerType * envapiptr_llvm_type
= type2llvm::env_api_llvm_ptr_type(llvm_cx);
#endif
if (!localenv_llvm_type)
return false;
/*
* runtime localenv: ^
* | parent
* +-------+ |
* parent_env [0] | o-------/
* +-------+
* unwind_fn [1] | o-------> env * (*)(env*, ctl)
* +-------+
* arg[i] [2+i] . ... .
* . ... .
* +-------+
*
* ctl=0 unwind. finalization for any arg[i] that requires it.
* returns nullptr
* ctl=1 copy. copy runtime environment to heap destination
* and return address of the copy
*
* arg[] comprises the subset of lambda arg names arg[j] for which
* lambda->is_captured(arg[j]) is true
*/
llvm::AllocaInst * localenv_alloca
= tmp_ir_builder.CreateAlloca(localenv_llvm_type,
nullptr /*ArraySize*/,
"_localenv");
if (!localenv_alloca)
return false;
/* remember environemnt location.
* Will need this if need to copy-to-stack
*/
this->localenv_alloca_ = localenv_alloca;
int i_localenv_slot = 0;
/* store localenv->parent_env */
{
llvm::Value * slot_addr
= runtime_localenv_slot_addr(llvm_cx,
localenv_llvm_type,
localenv_alloca,
i_localenv_slot,
//llvm_0ptr,
tmp_ir_builder);
if (!slot_addr)
return false;
++i_localenv_slot;
/* null pointer for now */
/* TODO: get parent environment (from runtime closure created for this function) */
llvm::Value * llvm_0ptr
= llvm::ConstantPointerNull::get(type2llvm::env_api_llvm_ptr_type(llvm_cx));
tmp_ir_builder.CreateStore(llvm_0ptr,
slot_addr);
}
/* store localenv->unwind_fn */
{
llvm::Value * slot_addr
= runtime_localenv_slot_addr(llvm_cx,
localenv_llvm_type,
localenv_alloca,
i_localenv_slot,
//llvm_0ptr,
tmp_ir_builder);
if (!slot_addr)
return false;
++i_localenv_slot;
/* null function pointer for now */
/* TODO: construct unwind function */
llvm::Value * llvm_0ptr
= (llvm::ConstantPointerNull::get
(type2llvm::require_localenv_unwind_llvm_fnptr_type(llvm_cx)));
tmp_ir_builder.CreateStore(llvm_0ptr,
slot_addr);
}
int i_arg = 0;
for (llvm::Argument & arg : llvm_fn->args()) {
if (i_arg == 0) {
/* to remove all doubt, ignore first arg here.
* it's non-captureable environment pointer
*/
} else {
std::string arg_name = std::string(arg.getName());
log && log("nested environment",
xtag("i", i_arg),
xtag("arg[i]", arg_name),
xtag("captured(i)", binding_v_[i_arg-1].is_captured()));
if (binding_v_[i_arg-1].is_captured()) {
// do something with runtime-local-env for this llvm_fn
/* remember stack location for reference + assignment
* in lambda body.
*
*/
TypeDescr arg_td = lambda_->fn_arg(i_arg-1);
llvm::Type * llvm_var_type = type2llvm::td_to_llvm_type(llvm_cx, arg_td);
llvm::Value * slot_addr
= runtime_localenv_slot_addr(llvm_cx,
localenv_llvm_type,
localenv_alloca,
i_localenv_slot,
tmp_ir_builder);
if (!slot_addr)
return false;
++i_localenv_slot;
tmp_ir_builder.CreateStore(&arg, slot_addr);
runtime_binding_detail binding = { i_arg, slot_addr, llvm_var_type };
this->alloc_var(arg_name, binding);
}
}
++i_arg;
}
}
return true;
} /*bind_locals*/
} /*namespace jit*/
} /*namespace xo*/
/* end activation_record.cpp */

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/* @file activation_record.cpp */
#include "activation_record.hpp"
#include "xo/indentlog/print/tag.hpp"
#include <iostream>
namespace xo {
namespace jit {
using std::cerr;
using std::endl;
int32_t
activation_record::lookup_var(const std::string & x) const {
auto ix = name2ix_map_.find(x);
if (ix == name2ix_map_.end()) {
cerr << "activation_record::lookup_var: no binding for variable x"
<< xtag("x", x)
<< endl;
return -1;
}
return ix->second;
} /*lookup_var*/
#ifdef OBSOLETE
llvm::AllocaInst *
activation_record::alloc_var(const std::string & x,
llvm::AllocaInst * alloca)
{
if (frame_.find(x) != frame_.end()) {
cerr << "activation_record::alloc_var: variable x already present in frame"
<< xtag("x", x)
<< endl;
return nullptr;
}
frame_[x] = alloca;
return alloca;
} /*alloc_var*/
#endif
} /*namespace jit*/
} /*namespace xo*/
/* end activation_record.cpp */

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/* @file activation_record.cpp */
#include "activation_record.hpp"
#include "xo/indentlog/print/tag.hpp"
#include <iostream>
namespace xo {
namespace jit {
using std::cerr;
using std::endl;
llvm::AllocaInst *
activation_record::lookup_var(const std::string & x) const {
auto ix = frame_.find(x);
if (ix == frame_.end()) {
cerr << "activation_record::lookup_var: no binding for variable x"
<< xtag("x", x)
<< endl;
return nullptr;
}
return ix->second;
} /*lookup_var*/
llvm::AllocaInst *
activation_record::alloc_var(const std::string & x,
llvm::AllocaInst * alloca)
{
if (frame_.find(x) != frame_.end()) {
cerr << "activation_record::alloc_var: variable x already present in frame"
<< xtag("x", x)
<< endl;
return nullptr;
}
frame_[x] = alloca;
return alloca;
} /*alloc_var*/
} /*namespace jit*/
} /*namespace xo*/
/* end activation_record.cpp */

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/* @file intrinsics.cpp */
#include "intrinsics.hpp"
/* FIXME: don't know how to mangle symbols yet,
* so putting functions invoked from jit into global namespace
*/
extern "C"
int32_t
mul_i32(int32_t x, int32_t y) {
return x * y;
}
extern "C"
double
mul_f64(double x, double y) {
return x * y;
}
/* end intrinsics.cpp */

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/* @file type2llvm.cpp */
#include "type2llvm.hpp"
#include "xo/reflect/Reflect.hpp"
//#include "xo/reflect/struct/StructMember.hpp"
namespace xo {
using xo::reflect::Reflect;
using xo::reflect::TypeDescr;
using xo::reflect::StructMember;
using std::cerr;
using std::endl;
namespace jit {
/** REMINDER:
* 1. creation of llvm types is idempotent
* (duplicate calls will receive the same llvm::Type* pointer)
* 2. llvm::Types are never deleted.
**/
llvm::Type *
type2llvm::td_to_llvm_type(xo::ref::brw<LlvmContext> llvm_cx, TypeDescr td) {
auto & llvm_cx_ref = llvm_cx->llvm_cx_ref();
if (td->is_function()) {
/* in this context, we're looking for a representation for a value,
* i.e. something that can be stored in a variable
*/
//return function_td_to_llvm_fnptr_type(llvm_cx, td);
return function_td_to_closureapi_lvtype(llvm_cx, td, "");
} else if (td->is_struct()) {
return struct_td_to_llvm_type(llvm_cx, td);
} else if (td->is_pointer()) {
return pointer_td_to_llvm_type(llvm_cx, td);
} else if (Reflect::is_native<bool>(td)) {
return llvm::Type::getInt1Ty(llvm_cx_ref);
} else if (Reflect::is_native<char>(td)) {
return llvm::Type::getInt8Ty(llvm_cx_ref);
} else if (Reflect::is_native<short>(td)) {
return llvm::Type::getInt16Ty(llvm_cx_ref);
} else if (Reflect::is_native<int>(td)) {
return llvm::Type::getInt32Ty(llvm_cx_ref);
} else if (Reflect::is_native<long>(td)) {
return llvm::Type::getInt64Ty(llvm_cx_ref);
} else if (Reflect::is_native<float>(td)) {
return llvm::Type::getFloatTy(llvm_cx_ref);
} else if (Reflect::is_native<double>(td)) {
return llvm::Type::getDoubleTy(llvm_cx_ref);
} else {
cerr << "td_to_llvm_type: no llvm type available for T"
<< xtag("T", td->short_name())
<< endl;
return nullptr;
}
} /*td_to_llvm_type*/
/** obtain llvm representation for a function type with the same signature as
* that represented by @p fn_td
**/
llvm::FunctionType *
type2llvm::function_td_to_lvtype(xo::ref::brw<LlvmContext> llvm_cx,
TypeDescr fn_td,
bool wrapper_flag)
{
constexpr bool c_debug_flag = false;
scope log(XO_DEBUG(c_debug_flag));
int n_ast_fn_arg = fn_td->n_fn_arg();
if (log) {
log(xtag("fn_td", fn_td->short_name()));
log(xtag("n_ast_fn_arg", n_ast_fn_arg));
}
std::vector<llvm::Type *> llvm_argtype_v;
llvm_argtype_v.reserve(n_ast_fn_arg + (wrapper_flag ? 1 : 0));
if (wrapper_flag)
llvm_argtype_v.push_back(env_api_llvm_ptr_type(llvm_cx));
/** check function args are all known **/
for (int i = 0; i < n_ast_fn_arg; ++i) {
TypeDescr arg_td = fn_td->fn_arg(i);
llvm::Type * llvm_argtype = type2llvm::td_to_llvm_type(llvm_cx, arg_td);
if (!llvm_argtype)
return nullptr;
if (log) {
log(xtag("arg_td", arg_td->short_name()));
log(xtag("llvm_argtype", "..."));
llvm_argtype->dump();
log("...done");
}
llvm_argtype_v.push_back(llvm_argtype);
}
TypeDescr retval_td = fn_td->fn_retval();
llvm::Type * llvm_retval = type2llvm::td_to_llvm_type(llvm_cx, retval_td);
if (log) {
log(xtag("retval_td", retval_td->short_name()));
log(xtag("llvm_retval", "..."));
llvm_retval->dump();
log("...done");
}
if (!llvm_retval)
return nullptr;
auto * llvm_fn_type = llvm::FunctionType::get(llvm_retval,
llvm_argtype_v,
false /*!varargs*/);
return llvm_fn_type;
} /*function_td_to_llvm_type*/
llvm::PointerType *
type2llvm::function_td_to_llvm_fnptr_type(xo::ref::brw<LlvmContext> llvm_cx,
TypeDescr /*fn_td*/,
bool /*wrapper_flag*/)
{
#ifdef OBSOLETE
auto * llvm_fn_type = function_td_to_lvtype(llvm_cx, fn_td, wrapper_flag);
#endif
/** like C: llvm IR doesn't support function-valued variables;
* it does however support pointer-to-function-valued variables
**/
auto * llvm_ptr_type
= llvm::PointerType::getUnqual(llvm_cx->llvm_cx_ref());
#ifdef OBSOLETE
auto * llvm_ptr_type
= llvm::PointerType::get(llvm_fn_type,
0 /*numbered address space*/);
#endif
return llvm_ptr_type;
}
/**
* Generate llvm::Type correspoinding to a TypeDescr for a struct.
**/
llvm::StructType *
type2llvm::struct_td_to_llvm_type(xo::ref::brw<LlvmContext> llvm_cx,
TypeDescr struct_td)
{
// see
// [[https://stackoverflow.com/questions/32299166/accessing-struct-members-and-arrays-of-structs-from-llvm-ir]]
auto & llvm_cx_ref = llvm_cx->llvm_cx_ref();
/* note: object pointer ignored for struct types,
* since number of members is known at compile time
*/
int n_member = struct_td->n_child(nullptr /*&object*/);
/* one type for each struct member */
std::vector<llvm::Type *> llvm_membertype_v;
llvm_membertype_v.reserve(n_member);
for (int i = 0; i < n_member; ++i) {
StructMember const & sm = struct_td->struct_member(i);
llvm_membertype_v.push_back(type2llvm::td_to_llvm_type(llvm_cx,
sm.get_member_td()));
}
std::string struct_name = std::string(struct_td->short_name());
/* structs with names: within an llvmcontext, must be unique
*
* We can however compare the offsets recorded in xo::reflect with
* offsets chosen by llvm, *once we've created the llvm type*
*
* Also, we can't guarantee that a c++ type was completely reflected --
* it's possible one or more members were omitted, in which case
* it's unlikely at best that llvm chooses the same layout.
*
* Instead: tell llvm to make packed struct,
* and introduce dummy members for padding.
*
* A consequence is we have to maintain mapping between llvm's
* member numbering and xo::reflect's
*/
llvm::StructType * llvm_struct_type
= llvm::StructType::create(llvm_cx_ref,
llvm_membertype_v,
llvm::StringRef(struct_name),
false /*!isPacked*/);
/* TODO: inspect (how) offsets that llvm is using
* we need them to match what C++ chose
*
* (because we want jitted llvm code to interoperate with
* C++ library code that has structs)
*/
// GetElementPtrInst is interesting,
// but I think that's for generating code
return llvm_struct_type;
} /*struct_td_to_llvm_type*/
llvm::PointerType *
type2llvm::pointer_td_to_llvm_type(xo::ref::brw<LlvmContext> llvm_cx
, TypeDescr pointer_td
)
{
(void)pointer_td;
assert(pointer_td->is_pointer());
#ifdef OBSOLETE
TypeDescr dest_td = pointer_td->fixed_child_td(0);
llvm::Type * llvm_dest_type = type2llvm::td_to_llvm_type(llvm_cx, dest_td);
llvm::PointerType * llvm_ptr_type
= llvm::PointerType::getUnqual(llvm_dest_type);
#endif
llvm::PointerType * llvm_ptr_type
= llvm::PointerType::getUnqual(llvm_cx->llvm_cx_ref());
return llvm_ptr_type;
} /*pointer_td_llvm_type*/
llvm::PointerType *
type2llvm::require_localenv_unwind_llvm_fnptr_type(xo::ref::brw<LlvmContext> llvm_cx,
llvm::PointerType * /*envptr_llvm_type*/)
{
#ifdef OBSOLETE
if (!envptr_llvm_type)
envptr_llvm_type = env_api_llvm_ptr_type(llvm_cx);
std::vector<llvm::Type *> llvm_argtype_v;
llvm_argtype_v.reserve(2);
/* 1st arg is _env_api pointer */
llvm_argtype_v.push_back(envptr_llvm_type);
/* 2nd arg is i32 */
llvm_argtype_v.push_back(llvm::Type::getInt32Ty(llvm_cx->llvm_cx_ref()));
/* return value is _env_api pointer */
llvm::Type * retval_llvm_type = envptr_llvm_type;
/* _env_api* (_env_api*, i32) */
auto * unwind_llvm_type
= llvm::FunctionType::get(retval_llvm_type,
llvm_argtype_v,
false /*!varargs*/);
/* _env_api* (*)(_env_api*, i32) */
auto * unwind_llvm_fnptr_type
= llvm::PointerType::getUnqual(unwind_llvm_type);
#endif
auto * unwind_llvm_fnptr_type
= llvm::PointerType::getUnqual(llvm_cx->llvm_cx_ref());
return unwind_llvm_fnptr_type;
} /*require_localenv_unwind_llvm_fnptr_type*/
llvm::StructType *
type2llvm::env_api_llvm_type(xo::ref::brw<LlvmContext> llvm_cx)
{
/* _env_api: base type for a local environment */
llvm::StructType * env_llvm_type
= llvm::StructType::get(llvm_cx->llvm_cx_ref(),
"_env_api");
#ifdef OBSOLETE
/* _env_api[0]: pointer to a local environment */
llvm::PointerType * envptr_llvm_type
= llvm::PointerType::getUnqual(env_llvm_type);
#endif
llvm::PointerType * envptr_llvm_type
= llvm::PointerType::getUnqual(llvm_cx->llvm_cx_ref());
/* _env_api[1]: unwwind/copy function */
llvm::PointerType * unwind_llvm_fnptr_type
= type2llvm::require_localenv_unwind_llvm_fnptr_type(llvm_cx,
envptr_llvm_type);
/* now supply _env_api members */
env_llvm_type->setBody(envptr_llvm_type /*_env_api[0]*/,
unwind_llvm_fnptr_type /*_env_api[1]*/);
return env_llvm_type;
} /*env_api_llvm_type*/
llvm::PointerType *
type2llvm::env_api_llvm_ptr_type(xo::ref::brw<LlvmContext> llvm_cx)
{
#ifdef OBSOLETE
llvm::StructType * env_llvm_type = env_api_llvm_type(llvm_cx);
return llvm::PointerType::getUnqual(env_llvm_type);
#endif
return llvm::PointerType::getUnqual(llvm_cx->llvm_cx_ref());
} /*env_api_llvm_ptr_type*/
llvm::StructType *
type2llvm::create_closureapi_lvtype(xo::ref::brw<LlvmContext> llvm_cx,
xo::ref::brw<FunctionInterface> fn)
{
constexpr const char * c_prefix = "c.";
/* e.g. "c.foo" */
std::string closure_name = std::string(c_prefix) + fn->name();
return function_td_to_closureapi_lvtype(llvm_cx,
fn->valuetype(),
closure_name);
} /*create_closureapi_lvtype*/
llvm::StructType *
type2llvm::function_td_to_closureapi_lvtype(xo::ref::brw<LlvmContext> llvm_cx,
TypeDescr fn_td,
const std::string & hint_name)
{
constexpr bool c_debug_flag = false;
scope log(XO_DEBUG(c_debug_flag));
/* would be precisely correct to use create_localenv_llvm_type()
* here. However judged not sufficiently helpful.
* Would still
* need environment cast whenever closure in apply position is
* not known at compile time.
*/
llvm::PointerType * fn_lvtype = function_td_to_llvm_fnptr_type(llvm_cx,
fn_td,
true /*wrapper_flag*/);
if (log) {
log(xtag("fn_lvtype", "..."));
fn_lvtype->dump();
log("...done");
}
llvm::PointerType * envptr_lvtype = env_api_llvm_ptr_type(llvm_cx);
if (log) {
log(xtag("env_lvtype", "..."));
envptr_lvtype->dump();
log("...done");
}
std::vector<llvm::Type *> member_lvtype_v = { fn_lvtype, envptr_lvtype };
llvm::StructType * closure_lvtype
= llvm::StructType::get(llvm_cx->llvm_cx_ref(), member_lvtype_v);
//closure_lvtype->setBody(member_lvtype_v);
if (!hint_name.empty())
closure_lvtype->setName(llvm::StringRef(hint_name));
if (log) {
log(xtag("closure_lvtype", "..."));
closure_lvtype->dump();
log("...done");
}
return closure_lvtype;
} /*function_td_to_closureapi_lvtype*/
llvm::StructType *
type2llvm::create_localenv_llvm_type(xo::ref::brw<LlvmContext> llvm_cx,
xo::ref::brw<Lambda> lambda)
{
constexpr const char * c_prefix = "e.";
llvm::PointerType * parentenvptr_llvm_type = env_api_llvm_ptr_type(llvm_cx);
llvm::PointerType * unwind_llvm_fnptr_type
= type2llvm::require_localenv_unwind_llvm_fnptr_type(llvm_cx, parentenvptr_llvm_type);
std::vector<llvm::Type *> member_llvm_type_v;
member_llvm_type_v.push_back(parentenvptr_llvm_type);
member_llvm_type_v.push_back(unwind_llvm_fnptr_type);
for (const auto & var : lambda->argv()) {
if (lambda->is_captured(var->name())) {
/* var is captured -> needs a slot in the localenv_llvm_type belonging to this lambda */
member_llvm_type_v.push_back(td_to_llvm_type(llvm_cx,
var->valuetype()));
}
}
/* e.g. "e.foo" */
std::string env_name = std::string(c_prefix) + lambda->name();
llvm::StructType * localenv_lvtype
= llvm::StructType::get(llvm_cx->llvm_cx_ref());
localenv_lvtype->setName(env_name);
localenv_lvtype->setBody(member_llvm_type_v, false /*!is_packed*/);
return localenv_lvtype;
} /*create_localenv_llvm_type*/
} /*namespace jit*/
} /*namespace xo*/
/* end type2llvm.cpp */