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IR: add assembly instruction

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This commit is contained in:
Andrew Kelley
2016-11-13 21:07:30 -05:00
parent 04c047463b
commit 2edc6c1a3f
5 changed files with 368 additions and 229 deletions
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132
src/codegen.cpp
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@@ -1537,6 +1537,136 @@ static LLVMValueRef ir_render_struct_field_ptr(CodeGen *g, IrExecutable *executa
return LLVMBuildStructGEP(g->builder, struct_ptr, field->gen_index, "");
}
static LLVMValueRef ir_render_asm(CodeGen *g, IrExecutable *executable, IrInstructionAsm *instruction) {
zig_panic("TODO render asm");
}
//static size_t find_asm_index(CodeGen *g, AstNode *node, AsmToken *tok) {
// const char *ptr = buf_ptr(node->data.asm_expr.asm_template) + tok->start + 2;
// size_t len = tok->end - tok->start - 2;
// size_t result = 0;
// for (size_t i = 0; i < node->data.asm_expr.output_list.length; i += 1, result += 1) {
// AsmOutput *asm_output = node->data.asm_expr.output_list.at(i);
// if (buf_eql_mem(asm_output->asm_symbolic_name, ptr, len)) {
// return result;
// }
// }
// for (size_t i = 0; i < node->data.asm_expr.input_list.length; i += 1, result += 1) {
// AsmInput *asm_input = node->data.asm_expr.input_list.at(i);
// if (buf_eql_mem(asm_input->asm_symbolic_name, ptr, len)) {
// return result;
// }
// }
// return SIZE_MAX;
//}
//
//static LLVMValueRef gen_asm_expr(CodeGen *g, AstNode *node) {
// assert(node->type == NodeTypeAsmExpr);
//
// AstNodeAsmExpr *asm_expr = &node->data.asm_expr;
//
// Buf *src_template = asm_expr->asm_template;
//
// Buf llvm_template = BUF_INIT;
// buf_resize(&llvm_template, 0);
//
// for (size_t token_i = 0; token_i < asm_expr->token_list.length; token_i += 1) {
// AsmToken *asm_token = &asm_expr->token_list.at(token_i);
// switch (asm_token->id) {
// case AsmTokenIdTemplate:
// for (size_t offset = asm_token->start; offset < asm_token->end; offset += 1) {
// uint8_t c = *((uint8_t*)(buf_ptr(src_template) + offset));
// if (c == '$') {
// buf_append_str(&llvm_template, "$$");
// } else {
// buf_append_char(&llvm_template, c);
// }
// }
// break;
// case AsmTokenIdPercent:
// buf_append_char(&llvm_template, '%');
// break;
// case AsmTokenIdVar:
// size_t index = find_asm_index(g, node, asm_token);
// assert(index < SIZE_MAX);
// buf_appendf(&llvm_template, "$%zu", index);
// break;
// }
// }
//
// Buf constraint_buf = BUF_INIT;
// buf_resize(&constraint_buf, 0);
//
// assert(asm_expr->return_count == 0 || asm_expr->return_count == 1);
//
// size_t total_constraint_count = asm_expr->output_list.length +
// asm_expr->input_list.length +
// asm_expr->clobber_list.length;
// size_t input_and_output_count = asm_expr->output_list.length +
// asm_expr->input_list.length -
// asm_expr->return_count;
// size_t total_index = 0;
// size_t param_index = 0;
// LLVMTypeRef *param_types = allocate<LLVMTypeRef>(input_and_output_count);
// LLVMValueRef *param_values = allocate<LLVMValueRef>(input_and_output_count);
// for (size_t i = 0; i < asm_expr->output_list.length; i += 1, total_index += 1) {
// AsmOutput *asm_output = asm_expr->output_list.at(i);
// bool is_return = (asm_output->return_type != nullptr);
// assert(*buf_ptr(asm_output->constraint) == '=');
// if (is_return) {
// buf_appendf(&constraint_buf, "=%s", buf_ptr(asm_output->constraint) + 1);
// } else {
// buf_appendf(&constraint_buf, "=*%s", buf_ptr(asm_output->constraint) + 1);
// }
// if (total_index + 1 < total_constraint_count) {
// buf_append_char(&constraint_buf, ',');
// }
//
// if (!is_return) {
// VariableTableEntry *variable = asm_output->variable;
// assert(variable);
// param_types[param_index] = LLVMTypeOf(variable->value_ref);
// param_values[param_index] = variable->value_ref;
// param_index += 1;
// }
// }
// for (size_t i = 0; i < asm_expr->input_list.length; i += 1, total_index += 1, param_index += 1) {
// AsmInput *asm_input = asm_expr->input_list.at(i);
// buf_append_buf(&constraint_buf, asm_input->constraint);
// if (total_index + 1 < total_constraint_count) {
// buf_append_char(&constraint_buf, ',');
// }
//
// TypeTableEntry *expr_type = get_expr_type(asm_input->expr);
// param_types[param_index] = expr_type->type_ref;
// param_values[param_index] = gen_expr(g, asm_input->expr);
// }
// for (size_t i = 0; i < asm_expr->clobber_list.length; i += 1, total_index += 1) {
// Buf *clobber_buf = asm_expr->clobber_list.at(i);
// buf_appendf(&constraint_buf, "~{%s}", buf_ptr(clobber_buf));
// if (total_index + 1 < total_constraint_count) {
// buf_append_char(&constraint_buf, ',');
// }
// }
//
// LLVMTypeRef ret_type;
// if (asm_expr->return_count == 0) {
// ret_type = LLVMVoidType();
// } else {
// ret_type = get_expr_type(node)->type_ref;
// }
// LLVMTypeRef function_type = LLVMFunctionType(ret_type, param_types, input_and_output_count, false);
//
// bool is_volatile = asm_expr->is_volatile || (asm_expr->output_list.length == 0);
// LLVMValueRef asm_fn = LLVMConstInlineAsm(function_type, buf_ptr(&llvm_template),
// buf_ptr(&constraint_buf), is_volatile, false);
//
// set_debug_source_node(g, node);
// return LLVMBuildCall(g->builder, asm_fn, param_values, input_and_output_count, "");
//}
//
static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable, IrInstruction *instruction) {
set_debug_source_node(g, instruction->source_node);
@@ -1579,6 +1709,8 @@ static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable,
return ir_render_call(g, executable, (IrInstructionCall *)instruction);
case IrInstructionIdStructFieldPtr:
return ir_render_struct_field_ptr(g, executable, (IrInstructionStructFieldPtr *)instruction);
case IrInstructionIdAsm:
return ir_render_asm(g, executable, (IrInstructionAsm *)instruction);
case IrInstructionIdSwitchBr:
case IrInstructionIdPhi:
case IrInstructionIdContainerInitList: