fix llvm_table shenanigans

src/codegen/llvm.zig

@@ -176,12 +176,14 @@ pub const Codegen = struct {
             .Call => |call| {
                 const name = call.callee.*.Variable.lexeme;
 
-                var llvm_func = self.llvm_table.get(name);
-                if (llvm_func == null) {
+                var llvm_func_entry = self.llvm_table.getEntry(name);
+                if (llvm_func_entry == null) {
                     std.debug.warn("Function '{}' not found\n", .{name});
                     return CompileError.EmitError;
                 }
 
+                const llvm_func = llvm_func_entry.?.value;
+
                 var args = LLVMValueList.init(self.allocator);
                 errdefer args.deinit();
 
@@ -194,7 +196,7 @@ pub const Codegen = struct {
 
                 return llvm.LLVMBuildCall(
                     builder,
-                    llvm_func.?,
+                    llvm_func,
                     args_slice.ptr,
                     @intCast(c_uint, args_slice.len),
                     "call",
@@ -432,7 +434,8 @@ pub const Codegen = struct {
                 );
 
                 var func = llvm.LLVMAddFunction(mod, name_cstr.ptr, llvm_ret_type);
-                _ = try self.llvm_table.put(name, func);
+                std.debug.warn("inserting function '{}' to llvm table\n", .{name});
+                try self.llvm_table.put(name, func);
 
                 var buf = try self.allocator.alloc(u8, 512);
                 var entry_lbl = try std.fmt.bufPrint(buf, "fn_{}_entry", .{name});