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|
import "llvm.src";
let codegen = struct {
llvm_module: LLVMModuleRef,
llvm_context: LLVMContextRef,
builder: LLVMBuilderRef,
arena: *arena,
};
let codegen_init = (alloc: *arena) => *codegen {
LLVMInitializeAllTargetInfos();
LLVMInitializeAllTargetMCs();
LLVMInitializeAllTargets();
LLVMInitializeAllAsmPrinters();
LLVMInitializeAllAsmParsers();
let module = LLVMModuleCreateWithName("module");
let context = LLVMGetGlobalContext();
let builder = LLVMCreateBuilder();
let c = cast(*codegen, arena_alloc(alloc, sizeof(codegen)));
(*c).llvm_module = module;
(*c).llvm_context = context;
(*c).builder = builder;
(*c).arena = alloc;
return c;
};
let create_node = (c: *codegen, n: Node) => *Node {
let res = cast(*Node, arena_alloc((*c).arena, sizeof(Node)));
*res = n;
return res;
};
let Variable = struct {
value: LLVMValueRef,
type: LLVMTypeRef,
node: *Node,
node_type: *Node,
stack_level: *i64,
};
let codegen_create_variable = (c: *codegen, variable: Variable) => *Variable {
let v = cast(*Variable, arena_alloc((*c).arena, sizeof(Variable)));
*v = variable;
return v;
};
let codegen_generate_literal = (c: *codegen, literal_val: LLVMValueRef, name: *i8, node: *Node, node_type: *Node) => *Variable {
/* TODO: Global */
let v = Variable{};
v.value = literal_val;
v.type = cast(LLVMTypeRef, null);
v.stack_level = cast(*i64, null);
v.node = node;
v.node_type = node_type;
return codegen_create_variable(c, v);
};
let codegen_generate_expression_value = (c: *codegen, expression: *Node, name: *i8) => *Variable {
if ((*expression).type == NODE_PRIMARY_EXPRESSION_NUMBER) {
let n = (*cast(*NODE_PRIMARY_EXPRESSION_NUMBER_DATA, (*expression).data)).value;
printf("X: %d\n", n);
let node_type = Node{};
node_type.type = NODE_TYPE_SIMPLE_TYPE;
let d = cast(*NODE_TYPE_SIMPLE_TYPE_DATA, arena_alloc((*c).arena, sizeof(NODE_TYPE_SIMPLE_TYPE_DATA)));
(*d).name = "i64";
(*d).underlying_type = cast(*Node, null);
node_type.data = cast(*void, d);
return codegen_generate_literal(c, LLVMConstInt(LLVMInt64Type(), n, 0), name, expression, create_node(c, node_type));
};
if ((*expression).type == NODE_FUNCTION_DEFINITION) {
printf("ASS %d\n", (*expression).type);
assert(false); /* TODO */
printf("ERT\n");
};
assert(false);
return cast(*Variable, null);
};
let codegen_generate_assignment_statement = (c: *codegen, stmt: *NODE_ASSIGNMENT_STATEMENT_DATA) => i64 {
let lhs = *((*stmt).lhs);
let prhs = (*stmt).rhs;
if (lhs.type == NODE_PRIMARY_EXPRESSION_IDENTIFIER) {
let identifier = (*cast(*NODE_PRIMARY_EXPRESSION_IDENTIFIER_DATA, lhs.data)).name;
printf("XX %s\n", identifier);
let variable = codegen_generate_expression_value(c, prhs, identifier);
assert(variable != cast(*Variable, null));
return 0;
};
assert(false);
return 0;
};
let codegen_generate_statement = (c: *codegen, statement: *Node) => i64 {
let stmt = *statement;
assert(stmt.type == NODE_ASSIGNMENT_STATEMENT); /* TODO: generate other node types */
let res = codegen_generate_assignment_statement(c, cast(*NODE_ASSIGNMENT_STATEMENT_DATA, stmt.data));
if res != 0 {
return 1;
};
printf("STMT: %d\n", stmt.type);
return 0;
};
let codegen_generate = (c: *codegen, ast: *Node) => i64 {
assert((*ast).type == NODE_PROGRAM);
let program = *cast(*NODE_PROGRAM_DATA, (*ast).data);
let i = 0;
while i < program.statements_len {
let stmt = *(program.statements + cast(**Node, i));
let res = codegen_generate_statement(c, stmt);
if res != 0 {
return 1;
};
i = i + 1;
};
return 0;
};
let codegen_compile = (c: *codegen) => i64 {
/* Dump module */
LLVMDumpModule((*c).llvm_module);
/* Generate code */
let triple = LLVMGetDefaultTargetTriple();
let target_ref = cast(*LLVMTargetRef, arena_alloc((*c).arena, sizeof(*LLVMTargetRef)));
let message = cast(**i8, null);
let result = LLVMGetTargetFromTriple(triple, target_ref, message);
if result != 0 {
printf("Target output: %s\n", *message);
LLVMDisposeMessage(*message);
};
let target_machine = LLVMCreateTargetMachine(
*target_ref,
triple,
"",
"",
LLVMCodeGenLevelDefault,
LLVMRelocDefault,
LLVMCodeModelDefault,
);
LLVMDisposeMessage(triple);
result = LLVMVerifyModule((*c).llvm_module, LLVMAbortProcessAction, message);
if result != 0 {
printf("Verification output: %s\n", *message);
LLVMDisposeMessage(*message);
};
/* Generate the object file */
let filename = "bootstrap_output.o";
LLVMTargetMachineEmitToFile(
target_machine,
(*c).llvm_module,
filename,
LLVMObjectFile,
cast(**i8, null),
);
LLVMDisposeTargetMachine(target_machine);
printf("Object file generated: %s\n", filename);
return 0;
};
let codegen_deinit = (c: *codegen) => void {
LLVMDisposeModule((*c).llvm_module);
LLVMShutdown();
LLVMDisposeBuilder((*c).builder);
return;
};
|
