diff options
| -rw-r--r-- | src/codegen.zig | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/src/codegen.zig b/src/codegen.zig index 0cc2367..019110c 100644 --- a/src/codegen.zig +++ b/src/codegen.zig @@ -420,8 +420,17 @@ pub const CodeGen = struct { if (function_definition.return_type.TYPE == .FUNCTION_TYPE) { return_type = llvm.LLVMPointerType(return_type, 0); } - const function_type = llvm.LLVMFunctionType(return_type, llvm_param_types.items.ptr, @intCast(llvm_param_types.items.len), is_varargs) orelse return CodeGenError.CompilationError; - const function = llvm.LLVMAddFunction(self.llvm_module, try std.fmt.allocPrintZ(self.arena, "{s}", .{name orelse "unnamed_func"}), function_type) orelse return CodeGenError.CompilationError; + var function: llvm.LLVMValueRef = null; + if (name != null) { + if (self.environment.get_variable(name.?)) |x| { + // If the function has been forward declared, we reuse its declaration + function = x.value; + } + } + if (function == null) { + const function_type = llvm.LLVMFunctionType(return_type, llvm_param_types.items.ptr, @intCast(llvm_param_types.items.len), is_varargs) orelse return CodeGenError.CompilationError; + function = llvm.LLVMAddFunction(self.llvm_module, try std.fmt.allocPrintZ(self.arena, "{s}", .{name orelse "unnamed_func"}), function_type) orelse return CodeGenError.CompilationError; + } const function_entry = llvm.LLVMAppendBasicBlock(function, "entrypoint") orelse return CodeGenError.CompilationError; llvm.LLVMPositionBuilderAtEnd(self.builder, function_entry); @@ -1099,14 +1108,4 @@ const Environment = struct { } return variable; } - - fn contains_variable(self: *Environment, name: []const u8) bool { - var i = self.scope_stack.items.len; - while (i > 0) { - i -= 1; - const scope = self.scope_stack.items[i]; - if (scope.variables.contains(name)) return true; - } - return false; - } }; |