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const std = @import("std");
const parser = @import("parser.zig");
const llvm = @import("llvm");
const target_m = llvm.target_machine;
const target = llvm.target;
const types = llvm.types;
const core = llvm.core;
pub const CodeGen = struct {
pub fn generate() void {
// Initialize LLVM
_ = target.LLVMInitializeNativeTarget();
_ = target.LLVMInitializeNativeAsmPrinter();
_ = target.LLVMInitializeNativeAsmParser();
// Create a new LLVM module
const module: types.LLVMModuleRef = core.LLVMModuleCreateWithName("sum_module");
var params: [2]types.LLVMTypeRef = [_]types.LLVMTypeRef{
core.LLVMInt32Type(),
core.LLVMInt32Type(),
};
var exit_params: [1]types.LLVMTypeRef = [_]types.LLVMTypeRef{
core.LLVMInt32Type(),
};
const exit_func_type: types.LLVMTypeRef = core.LLVMFunctionType(core.LLVMInt32Type(), &exit_params, 1, 0);
const exit_func: types.LLVMValueRef = core.LLVMAddFunction(module, "exit", exit_func_type);
// Create a function that computes the sum of two integers
const func_type: types.LLVMTypeRef = core.LLVMFunctionType(core.LLVMInt32Type(), ¶ms, 2, 0);
const sum_func: types.LLVMValueRef = core.LLVMAddFunction(module, "main", func_type);
const entry: types.LLVMBasicBlockRef = core.LLVMAppendBasicBlock(sum_func, "entry");
const builder: types.LLVMBuilderRef = core.LLVMCreateBuilder();
core.LLVMPositionBuilderAtEnd(builder, entry);
const arg1: types.LLVMValueRef = core.LLVMGetParam(sum_func, 0);
const arg2: types.LLVMValueRef = core.LLVMGetParam(sum_func, 1);
const sum: types.LLVMValueRef = core.LLVMBuildAdd(builder, arg1, arg2, "sum");
const exit_status: types.LLVMValueRef = core.LLVMConstInt(core.LLVMInt32Type(), 7, 0);
var exit_args: [1]types.LLVMValueRef = undefined;
exit_args[0] = exit_status;
_ = core.LLVMBuildCall2(builder, exit_func_type, exit_func, &exit_args, 1, "exit_call");
_ = core.LLVMBuildRet(builder, sum);
const triple = target_m.LLVMGetDefaultTargetTriple();
var target_ref: types.LLVMTargetRef = undefined;
_ = target_m.LLVMGetTargetFromTriple(triple, &target_ref, null);
const target_machine = target_m.LLVMCreateTargetMachine(
target_ref,
triple,
"generic",
"",
types.LLVMCodeGenOptLevel.LLVMCodeGenLevelDefault,
types.LLVMRelocMode.LLVMRelocDefault,
types.LLVMCodeModel.LLVMCodeModelDefault,
);
// Generate the object file
const filename = "output.o";
_ = target_m.LLVMTargetMachineEmitToFile(
target_machine,
module,
filename,
types.LLVMCodeGenFileType.LLVMObjectFile,
null,
);
std.debug.print("Object file generated: {s}\n", .{filename});
// Clean up LLVM resources
core.LLVMDisposeBuilder(builder);
core.LLVMDisposeModule(module);
core.LLVMShutdown();
}
};
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