diff options
Diffstat (limited to 'src/ir.cpp')
| -rw-r--r-- | src/ir.cpp | 177 |
1 files changed, 105 insertions, 72 deletions
diff --git a/src/ir.cpp b/src/ir.cpp index 0f97073824..e0cb345a7a 100644 --- a/src/ir.cpp +++ b/src/ir.cpp @@ -200,6 +200,7 @@ static T *ir_create_instruction(IrExecutable *exec, AstNode *source_node) { template<typename T> static T *ir_build_instruction(IrBuilder *irb, AstNode *source_node) { + assert(source_node); T *special_instruction = ir_create_instruction<T>(irb->exec, source_node); ir_instruction_append(irb->current_basic_block, &special_instruction->base); return special_instruction; @@ -220,7 +221,7 @@ static IrInstruction *ir_build_cast(IrBuilder *irb, AstNode *source_node, IrInst } static IrInstruction *ir_build_cond_br(IrBuilder *irb, AstNode *source_node, IrInstruction *condition, - IrBasicBlock *then_block, IrBasicBlock *else_block) + IrBasicBlock *then_block, IrBasicBlock *else_block, bool is_inline) { IrInstructionCondBr *cond_br_instruction = ir_build_instruction<IrInstructionCondBr>(irb, source_node); cond_br_instruction->base.type_entry = irb->codegen->builtin_types.entry_unreachable; @@ -228,6 +229,7 @@ static IrInstruction *ir_build_cond_br(IrBuilder *irb, AstNode *source_node, IrI cond_br_instruction->condition = condition; cond_br_instruction->then_block = then_block; cond_br_instruction->else_block = else_block; + cond_br_instruction->is_inline = is_inline; ir_ref_instruction(condition); ir_ref_bb(then_block); @@ -237,10 +239,10 @@ static IrInstruction *ir_build_cond_br(IrBuilder *irb, AstNode *source_node, IrI } static IrInstruction *ir_build_cond_br_from(IrBuilder *irb, IrInstruction *old_instruction, - IrInstruction *condition, IrBasicBlock *then_block, IrBasicBlock *else_block) + IrInstruction *condition, IrBasicBlock *then_block, IrBasicBlock *else_block, bool is_inline) { IrInstruction *new_instruction = ir_build_cond_br(irb, old_instruction->source_node, - condition, then_block, else_block); + condition, then_block, else_block, is_inline); ir_link_new_instruction(new_instruction, old_instruction); return new_instruction; } @@ -517,22 +519,23 @@ static IrInstruction *ir_build_phi_from(IrBuilder *irb, IrInstruction *old_instr return new_instruction; } -static IrInstruction *ir_build_br(IrBuilder *irb, AstNode *source_node, IrBasicBlock *dest_block) { +static IrInstruction *ir_build_br(IrBuilder *irb, AstNode *source_node, IrBasicBlock *dest_block, bool is_inline) { IrInstructionBr *br_instruction = ir_build_instruction<IrInstructionBr>(irb, source_node); br_instruction->base.type_entry = irb->codegen->builtin_types.entry_unreachable; br_instruction->base.static_value.ok = true; br_instruction->dest_block = dest_block; + br_instruction->is_inline = is_inline; ir_ref_bb(dest_block); return &br_instruction->base; } -//static IrInstruction *ir_build_br_from(IrBuilder *irb, IrInstruction *old_instruction, IrBasicBlock *dest_block) { -// IrInstruction *new_instruction = ir_build_br(irb, old_instruction->source_node, dest_block); -// ir_link_new_instruction(new_instruction, old_instruction); -// return new_instruction; -//} +static IrInstruction *ir_build_br_from(IrBuilder *irb, IrInstruction *old_instruction, IrBasicBlock *dest_block) { + IrInstruction *new_instruction = ir_build_br(irb, old_instruction->source_node, dest_block, false); + ir_link_new_instruction(new_instruction, old_instruction); + return new_instruction; +} static IrInstruction *ir_build_un_op(IrBuilder *irb, AstNode *source_node, IrUnOp op_id, IrInstruction *value) { IrInstructionUnOp *br_instruction = ir_build_instruction<IrInstructionUnOp>(irb, source_node); @@ -634,7 +637,7 @@ static IrInstruction *ir_build_var_decl(IrBuilder *irb, AstNode *source_node, decl_var_instruction->var_type = var_type; decl_var_instruction->init_value = init_value; - ir_ref_instruction(var_type); + if (var_type) ir_ref_instruction(var_type); ir_ref_instruction(init_value); return &decl_var_instruction->base; @@ -775,13 +778,14 @@ static void ir_set_cursor_at_end(IrBuilder *irb, IrBasicBlock *basic_block) { } static VariableTableEntry *add_local_var(CodeGen *codegen, AstNode *node, BlockContext *scope, - Buf *name, bool is_const, bool is_shadowable) + Buf *name, bool src_is_const, bool gen_is_const, bool is_shadowable, bool is_inline) { VariableTableEntry *variable_entry = allocate<VariableTableEntry>(1); variable_entry->block_context = scope; variable_entry->import = node->owner; variable_entry->shadowable = is_shadowable; variable_entry->mem_slot_index = SIZE_MAX; + variable_entry->is_inline = is_inline; if (name) { buf_init_from_buf(&variable_entry->name, name); @@ -817,7 +821,8 @@ static VariableTableEntry *add_local_var(CodeGen *codegen, AstNode *node, BlockC buf_init_from_str(&variable_entry->name, "_anon"); } - variable_entry->is_const = is_const; + variable_entry->src_is_const = src_is_const; + variable_entry->gen_is_const = gen_is_const; variable_entry->decl_node = node; return variable_entry; @@ -825,10 +830,12 @@ static VariableTableEntry *add_local_var(CodeGen *codegen, AstNode *node, BlockC // Set name to nullptr to make the variable anonymous (not visible to programmer). static VariableTableEntry *ir_add_local_var(IrBuilder *irb, AstNode *node, BlockContext *scope, Buf *name, - bool is_const, bool is_shadowable) + bool src_is_const, bool gen_is_const, bool is_shadowable, bool is_inline) { - VariableTableEntry *var = add_local_var(irb->codegen, node, scope, name, is_const, is_shadowable); - var->mem_slot_index = exec_next_mem_slot(irb->exec); + VariableTableEntry *var = add_local_var(irb->codegen, node, scope, name, + src_is_const, gen_is_const, is_shadowable, is_inline); + if (is_inline || gen_is_const) + var->mem_slot_index = exec_next_mem_slot(irb->exec); return var; } @@ -1189,14 +1196,14 @@ static IrInstruction *ir_gen_if_bool_expr(IrBuilder *irb, AstNode *node) { IrBasicBlock *else_block = ir_build_basic_block(irb, "Else"); IrBasicBlock *endif_block = ir_build_basic_block(irb, "EndIf"); - ir_build_cond_br(irb, condition->source_node, condition, then_block, else_block); + ir_build_cond_br(irb, condition->source_node, condition, then_block, else_block, false); ir_set_cursor_at_end(irb, then_block); IrInstruction *then_expr_result = ir_gen_node(irb, then_node, node->block_context); if (then_expr_result == irb->codegen->invalid_instruction) return then_expr_result; IrBasicBlock *after_then_block = irb->current_basic_block; - ir_build_br(irb, node, endif_block); + ir_build_br(irb, node, endif_block, false); ir_set_cursor_at_end(irb, else_block); IrInstruction *else_expr_result; @@ -1208,7 +1215,7 @@ static IrInstruction *ir_gen_if_bool_expr(IrBuilder *irb, AstNode *node) { else_expr_result = ir_build_const_void(irb, node); } IrBasicBlock *after_else_block = irb->current_basic_block; - ir_build_br(irb, node, endif_block); + ir_build_br(irb, node, endif_block, false); ir_set_cursor_at_end(irb, endif_block); IrInstruction **incoming_values = allocate<IrInstruction *>(2); @@ -1333,8 +1340,9 @@ static IrInstruction *ir_gen_var_decl(IrBuilder *irb, AstNode *node) { bool is_shadowable = false; bool is_const = variable_declaration->is_const; bool is_extern = variable_declaration->is_extern; + bool is_inline = variable_declaration->is_inline; VariableTableEntry *var = ir_add_local_var(irb, node, node->block_context, - variable_declaration->symbol, is_const, is_shadowable); + variable_declaration->symbol, is_const, is_const, is_shadowable, is_inline); if (!is_extern && !variable_declaration->expr) { var->type = irb->codegen->builtin_types.entry_invalid; @@ -1356,18 +1364,18 @@ static IrInstruction *ir_gen_while_expr(IrBuilder *irb, AstNode *node) { ir_build_basic_block(irb, "WhileContinue") : cond_block; IrBasicBlock *end_block = ir_build_basic_block(irb, "WhileEnd"); - ir_build_br(irb, node, cond_block); + bool is_inline = node->data.while_expr.is_inline; + ir_build_br(irb, node, cond_block, is_inline); if (continue_expr_node) { ir_set_cursor_at_end(irb, continue_block); ir_gen_node(irb, continue_expr_node, node->block_context); - ir_build_br(irb, node, cond_block); - + ir_build_br(irb, node, cond_block, is_inline); } ir_set_cursor_at_end(irb, cond_block); IrInstruction *cond_val = ir_gen_node(irb, node->data.while_expr.condition, node->block_context); - ir_build_cond_br(irb, node->data.while_expr.condition, cond_val, body_block, end_block); + ir_build_cond_br(irb, node->data.while_expr.condition, cond_val, body_block, end_block, is_inline); ir_set_cursor_at_end(irb, body_block); @@ -1377,7 +1385,7 @@ static IrInstruction *ir_gen_while_expr(IrBuilder *irb, AstNode *node) { irb->break_block_stack.pop(); irb->continue_block_stack.pop(); - ir_build_br(irb, node, continue_block); + ir_build_br(irb, node, continue_block, is_inline); ir_set_cursor_at_end(irb, end_block); return ir_build_const_void(irb, node); @@ -1411,30 +1419,36 @@ static IrInstruction *ir_gen_for_expr(IrBuilder *irb, AstNode *node) { } else { elem_var_type = ir_build_ptr_type_child(irb, elem_node, pointer_type); } + bool is_inline = node->data.for_expr.is_inline; BlockContext *child_scope = new_block_context(node, parent_scope); child_scope->parent_loop_node = node; elem_node->block_context = child_scope; // TODO make it an error to write to element variable or i variable. - Buf *elem_var_name = elem_node->data.symbol_expr.symbol; - node->data.for_expr.elem_var = ir_add_local_var(irb, elem_node, child_scope, elem_var_name, false, false); + node->data.for_expr.elem_var = ir_add_local_var(irb, elem_node, child_scope, elem_var_name, + true, false, false, is_inline); IrInstruction *undefined_value = ir_build_const_undefined(irb, elem_node); ir_build_var_decl(irb, elem_node, node->data.for_expr.elem_var, elem_var_type, undefined_value); IrInstruction *elem_var_ptr = ir_build_var_ptr(irb, node, node->data.for_expr.elem_var); + AstNode *index_var_source_node; if (index_node) { + index_var_source_node = index_node; Buf *index_var_name = index_node->data.symbol_expr.symbol; index_node->block_context = child_scope; - node->data.for_expr.index_var = ir_add_local_var(irb, index_node, child_scope, index_var_name, false, false); + node->data.for_expr.index_var = ir_add_local_var(irb, index_node, child_scope, index_var_name, + true, false, false, is_inline); } else { - node->data.for_expr.index_var = ir_add_local_var(irb, node, child_scope, nullptr, false, true); + index_var_source_node = node; + node->data.for_expr.index_var = ir_add_local_var(irb, node, child_scope, nullptr, + true, false, true, is_inline); } IrInstruction *usize = ir_build_const_type(irb, node, irb->codegen->builtin_types.entry_usize); IrInstruction *zero = ir_build_const_usize(irb, node, 0); IrInstruction *one = ir_build_const_usize(irb, node, 1); - ir_build_var_decl(irb, index_node, node->data.for_expr.index_var, usize, zero); + ir_build_var_decl(irb, index_var_source_node, node->data.for_expr.index_var, usize, zero); IrInstruction *index_ptr = ir_build_var_ptr(irb, node, node->data.for_expr.index_var); @@ -1444,12 +1458,12 @@ static IrInstruction *ir_gen_for_expr(IrBuilder *irb, AstNode *node) { IrBasicBlock *continue_block = ir_build_basic_block(irb, "ForContinue"); IrInstruction *len_val = ir_build_read_field(irb, node, array_val, irb->codegen->len_buf); - ir_build_br(irb, node, cond_block); + ir_build_br(irb, node, cond_block, is_inline); ir_set_cursor_at_end(irb, cond_block); IrInstruction *index_val = ir_build_load_ptr(irb, node, index_ptr); IrInstruction *cond = ir_build_bin_op(irb, node, IrBinOpCmpLessThan, index_val, len_val); - ir_build_cond_br(irb, node, cond, body_block, end_block); + ir_build_cond_br(irb, node, cond, body_block, end_block, is_inline); ir_set_cursor_at_end(irb, body_block); IrInstruction *elem_ptr = ir_build_elem_ptr(irb, node, array_val, index_val); @@ -1467,12 +1481,12 @@ static IrInstruction *ir_gen_for_expr(IrBuilder *irb, AstNode *node) { irb->break_block_stack.pop(); irb->continue_block_stack.pop(); - ir_build_br(irb, node, continue_block); + ir_build_br(irb, node, continue_block, is_inline); ir_set_cursor_at_end(irb, continue_block); IrInstruction *new_index_val = ir_build_bin_op(irb, node, IrBinOpAdd, index_val, one); ir_build_store_ptr(irb, node, index_ptr, new_index_val); - ir_build_br(irb, node, cond_block); + ir_build_br(irb, node, cond_block, is_inline); ir_set_cursor_at_end(irb, end_block); return ir_build_const_void(irb, node); @@ -1911,23 +1925,41 @@ static void ir_inline_bb(IrAnalyze *ira, IrBasicBlock *old_bb) { } -static ConstExprValue *ir_get_out_val(IrInstruction *instruction) { - instruction->other = instruction; - return &instruction->static_value; +static ConstExprValue *ir_build_const_from(IrAnalyze *ira, IrInstruction *old_instruction, + bool depends_on_compile_var) +{ + IrInstruction *new_instruction; + if (old_instruction->id == IrInstructionIdVarPtr) { + IrInstructionVarPtr *old_var_ptr_instruction = (IrInstructionVarPtr *)old_instruction; + IrInstructionVarPtr *var_ptr_instruction = ir_create_instruction<IrInstructionVarPtr>(ira->new_irb.exec, + old_instruction->source_node); + var_ptr_instruction->var = old_var_ptr_instruction->var; + new_instruction = &var_ptr_instruction->base; + } else if (old_instruction->id == IrInstructionIdFieldPtr) { + zig_panic("TODO"); + } else if (old_instruction->id == IrInstructionIdElemPtr) { + zig_panic("TODO"); + } else { + IrInstructionConst *const_instruction = ir_create_instruction<IrInstructionConst>(ira->new_irb.exec, + old_instruction->source_node); + new_instruction = &const_instruction->base; + } + ir_link_new_instruction(new_instruction, old_instruction); + ConstExprValue *const_val = &new_instruction->static_value; + const_val->ok = true; + const_val->depends_on_compile_var = depends_on_compile_var; + return const_val; } static TypeTableEntry *ir_analyze_void(IrAnalyze *ira, IrInstruction *instruction) { - ConstExprValue *const_val = ir_get_out_val(instruction); - const_val->ok = true; + ir_build_const_from(ira, instruction, false); return ira->codegen->builtin_types.entry_void; } static TypeTableEntry *ir_analyze_const_usize(IrAnalyze *ira, IrInstruction *instruction, uint64_t value, bool depends_on_compile_var) { - ConstExprValue *const_val = ir_get_out_val(instruction); - const_val->ok = true; - const_val->depends_on_compile_var = depends_on_compile_var; + ConstExprValue *const_val = ir_build_const_from(ira, instruction, depends_on_compile_var); bignum_init_unsigned(&const_val->data.x_bignum, value); return ira->codegen->builtin_types.entry_usize; } @@ -2295,7 +2327,8 @@ static TypeTableEntry *ir_analyze_bin_op_bool(IrAnalyze *ira, IrInstructionBinOp ConstExprValue *op1_val = &casted_op1->static_value; ConstExprValue *op2_val = &casted_op2->static_value; if (op1_val->ok && op2_val->ok) { - ConstExprValue *out_val = ir_get_out_val(&bin_op_instruction->base); + bool depends_on_compile_var = op1_val->depends_on_compile_var || op2_val->depends_on_compile_var; + ConstExprValue *out_val = ir_build_const_from(ira, &bin_op_instruction->base, depends_on_compile_var); assert(op1->type_entry->id == TypeTableEntryIdBool); assert(op2->type_entry->id == TypeTableEntryIdBool); @@ -2306,14 +2339,10 @@ static TypeTableEntry *ir_analyze_bin_op_bool(IrAnalyze *ira, IrInstructionBinOp } else { zig_unreachable(); } - out_val->ok = true; - out_val->depends_on_compile_var = op1_val->depends_on_compile_var || - op2_val->depends_on_compile_var; return bool_type; } ir_build_bin_op_from(&ira->new_irb, &bin_op_instruction->base, bin_op_instruction->op_id, op1->other, op2->other); - return bool_type; } @@ -2425,9 +2454,8 @@ static TypeTableEntry *ir_analyze_bin_op_cmp(IrAnalyze *ira, IrInstructionBinOp } } - ConstExprValue *out_val = ir_get_out_val(&bin_op_instruction->base); - out_val->ok = true; - out_val->depends_on_compile_var = op1_val->depends_on_compile_var || op2_val->depends_on_compile_var; + bool depends_on_compile_var = op1_val->depends_on_compile_var || op2_val->depends_on_compile_var; + ConstExprValue *out_val = ir_build_const_from(ira, &bin_op_instruction->base, depends_on_compile_var); out_val->data.x_bool = answer; return ira->codegen->builtin_types.entry_bool; } @@ -4108,12 +4136,15 @@ static TypeTableEntry *ir_analyze_instruction_br(IrAnalyze *ira, IrInstructionBr // TODO detect backward jumps - ir_inline_bb(ira, old_dest_block); - return ira->codegen->builtin_types.entry_unreachable; + if (br_instruction->is_inline || old_dest_block->ref_count == 1) { + ir_inline_bb(ira, old_dest_block); + return ira->codegen->builtin_types.entry_unreachable; + } - //IrBasicBlock *new_bb = ir_get_new_bb(ira, old_dest_block); - //ir_build_br_from(&ira->new_irb, &br_instruction->base, new_bb); - //return ira->codegen->builtin_types.entry_unreachable; + IrBasicBlock *new_bb = ir_get_new_bb(ira, old_dest_block); + ir_build_br_from(&ira->new_irb, &br_instruction->base, new_bb); + ir_finish_bb(ira); + return ira->codegen->builtin_types.entry_unreachable; } static TypeTableEntry *ir_analyze_instruction_cond_br(IrAnalyze *ira, IrInstructionCondBr *cond_br_instruction) { @@ -4129,13 +4160,20 @@ static TypeTableEntry *ir_analyze_instruction_cond_br(IrAnalyze *ira, IrInstruct IrBasicBlock *old_dest_block = condition->static_value.data.x_bool ? cond_br_instruction->then_block : cond_br_instruction->else_block; - ir_inline_bb(ira, old_dest_block); + if (cond_br_instruction->is_inline || old_dest_block->ref_count == 1) { + ir_inline_bb(ira, old_dest_block); + return ira->codegen->builtin_types.entry_unreachable; + } + } else if (cond_br_instruction->is_inline) { + add_node_error(ira->codegen, condition->source_node, + buf_sprintf("unable to evaluate constant expression")); + ir_finish_bb(ira); return ira->codegen->builtin_types.entry_unreachable; } IrBasicBlock *new_then_block = ir_get_new_bb(ira, cond_br_instruction->then_block); IrBasicBlock *new_else_block = ir_get_new_bb(ira, cond_br_instruction->else_block); - ir_build_cond_br_from(&ira->new_irb, &cond_br_instruction->base, condition, new_then_block, new_else_block); + ir_build_cond_br_from(&ira->new_irb, &cond_br_instruction->base, condition, new_then_block, new_else_block, false); ir_finish_bb(ira); return ira->codegen->builtin_types.entry_unreachable; } @@ -4206,7 +4244,8 @@ static TypeTableEntry *ir_analyze_instruction_phi(IrAnalyze *ira, IrInstructionP IrInstruction *value = phi_instruction->incoming_values[i]->other; assert(value->type_entry); if (value->static_value.ok) { - ConstExprValue *out_val = ir_get_out_val(&phi_instruction->base); + ConstExprValue *out_val = ir_build_const_from(ira, &phi_instruction->base, + value->static_value.depends_on_compile_var); *out_val = value->static_value; } else { phi_instruction->base.other = value; @@ -4259,9 +4298,9 @@ static TypeTableEntry *ir_analyze_instruction_var_ptr(IrAnalyze *ira, IrInstruct if (var->mem_slot_index != SIZE_MAX) { ConstExprValue *mem_slot = &ira->exec_context.mem_slot_list[var->mem_slot_index]; if (mem_slot->ok) { - ConstExprValue *out_val = ir_get_out_val(&var_ptr_instruction->base); + ConstExprValue *out_val = ir_build_const_from(ira, &var_ptr_instruction->base, + mem_slot->depends_on_compile_var); - out_val->ok = true; out_val->data.x_ptr.len = 1; out_val->data.x_ptr.is_c_str = false; out_val->data.x_ptr.ptr = allocate<ConstExprValue *>(1); @@ -4477,7 +4516,8 @@ static TypeTableEntry *ir_analyze_instruction_load_ptr(IrAnalyze *ira, IrInstruc if (ptr->static_value.ok) { ConstExprValue *pointee = ptr->static_value.data.x_ptr.ptr[0]; if (pointee->ok) { - ConstExprValue *out_val = ir_get_out_val(&load_ptr_instruction->base); + ConstExprValue *out_val = ir_build_const_from(ira, &load_ptr_instruction->base, + pointee->depends_on_compile_var); *out_val = *pointee; return child_type; } @@ -4576,8 +4616,7 @@ static TypeTableEntry *ir_analyze_instruction_typeof(IrAnalyze *ira, IrInstructi case TypeTableEntryIdFn: case TypeTableEntryIdTypeDecl: { - ConstExprValue *out_val = ir_get_out_val(&typeof_instruction->base); - out_val->ok = true; + ConstExprValue *out_val = ir_build_const_from(ira, &typeof_instruction->base, false); // TODO depends_on_compile_var should be set based on whether the type of the expression // depends_on_compile_var. but we currently don't have a thing to tell us if the type of // something depends on a compile var @@ -4609,9 +4648,8 @@ static TypeTableEntry *ir_analyze_instruction_to_ptr_type(IrAnalyze *ira, return ira->codegen->builtin_types.entry_invalid; } - ConstExprValue *out_val = ir_get_out_val(&to_ptr_type_instruction->base); - out_val->ok = true; - out_val->depends_on_compile_var = type_value->static_value.depends_on_compile_var; + ConstExprValue *out_val = ir_build_const_from(ira, &to_ptr_type_instruction->base, + type_value->static_value.depends_on_compile_var); out_val->data.x_type = ptr_type; return ira->codegen->builtin_types.entry_type; } @@ -4630,9 +4668,8 @@ static TypeTableEntry *ir_analyze_instruction_ptr_type_child(IrAnalyze *ira, return ira->codegen->builtin_types.entry_invalid; } - ConstExprValue *out_val = ir_get_out_val(&ptr_type_child_instruction->base); - out_val->ok = true; - out_val->depends_on_compile_var = type_value->static_value.depends_on_compile_var; + ConstExprValue *out_val = ir_build_const_from(ira, &ptr_type_child_instruction->base, + type_value->static_value.depends_on_compile_var); out_val->data.x_type = type_entry->data.pointer.child_type; return ira->codegen->builtin_types.entry_type; } @@ -4734,10 +4771,6 @@ TypeTableEntry *ir_analyze(CodeGen *codegen, IrExecutable *old_exec, IrExecutabl while (ira->block_queue_index < ira->old_bb_queue.length) { IrInstruction *old_instruction = ira->old_irb.current_basic_block->instruction_list.at(ira->instruction_index); - fprintf(stderr, "===%zu====", old_instruction->debug_id); - ir_print(stderr, ira->new_irb.exec, 4); - fprintf(stderr, "========"); - if (old_instruction->ref_count == 0 && !ir_has_side_effects(old_instruction)) { ira->instruction_index += 1; continue; |