| /* |
| * Copyright (C) 2011-2017 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "DFGCapabilities.h" |
| |
| #if ENABLE(DFG_JIT) |
| |
| #include "CodeBlock.h" |
| #include "DFGCommon.h" |
| #include "InterpreterInlines.h" |
| #include "JSCInlines.h" |
| #include "Options.h" |
| |
| namespace JSC { namespace DFG { |
| |
| bool isSupported() |
| { |
| return Options::useDFGJIT() |
| && MacroAssembler::supportsFloatingPoint(); |
| } |
| |
| bool isSupportedForInlining(CodeBlock* codeBlock) |
| { |
| return codeBlock->ownerScriptExecutable()->isInliningCandidate(); |
| } |
| |
| bool mightCompileEval(CodeBlock* codeBlock) |
| { |
| return isSupported() |
| && codeBlock->instructionCount() <= Options::maximumOptimizationCandidateInstructionCount() |
| && codeBlock->ownerScriptExecutable()->isOkToOptimize(); |
| } |
| bool mightCompileProgram(CodeBlock* codeBlock) |
| { |
| return isSupported() |
| && codeBlock->instructionCount() <= Options::maximumOptimizationCandidateInstructionCount() |
| && codeBlock->ownerScriptExecutable()->isOkToOptimize(); |
| } |
| bool mightCompileFunctionForCall(CodeBlock* codeBlock) |
| { |
| return isSupported() |
| && codeBlock->instructionCount() <= Options::maximumOptimizationCandidateInstructionCount() |
| && codeBlock->ownerScriptExecutable()->isOkToOptimize(); |
| } |
| bool mightCompileFunctionForConstruct(CodeBlock* codeBlock) |
| { |
| return isSupported() |
| && codeBlock->instructionCount() <= Options::maximumOptimizationCandidateInstructionCount() |
| && codeBlock->ownerScriptExecutable()->isOkToOptimize(); |
| } |
| |
| bool mightInlineFunctionForCall(CodeBlock* codeBlock) |
| { |
| return codeBlock->instructionCount() <= Options::maximumFunctionForCallInlineCandidateInstructionCount() |
| && isSupportedForInlining(codeBlock); |
| } |
| bool mightInlineFunctionForClosureCall(CodeBlock* codeBlock) |
| { |
| return codeBlock->instructionCount() <= Options::maximumFunctionForClosureCallInlineCandidateInstructionCount() |
| && isSupportedForInlining(codeBlock); |
| } |
| bool mightInlineFunctionForConstruct(CodeBlock* codeBlock) |
| { |
| return codeBlock->instructionCount() <= Options::maximumFunctionForConstructInlineCandidateInstructionCount() |
| && isSupportedForInlining(codeBlock); |
| } |
| bool canUseOSRExitFuzzing(CodeBlock* codeBlock) |
| { |
| return codeBlock->ownerScriptExecutable()->canUseOSRExitFuzzing(); |
| } |
| |
| static bool verboseCapabilities() |
| { |
| return verboseCompilationEnabled() || Options::verboseDFGFailure(); |
| } |
| |
| inline void debugFail(CodeBlock* codeBlock, OpcodeID opcodeID, CapabilityLevel result) |
| { |
| if (verboseCapabilities() && !canCompile(result)) |
| dataLog("DFG rejecting opcode in ", *codeBlock, " because of opcode ", opcodeNames[opcodeID], "\n"); |
| } |
| |
| CapabilityLevel capabilityLevel(OpcodeID opcodeID, CodeBlock* codeBlock, const Instruction* pc) |
| { |
| UNUSED_PARAM(codeBlock); // This function does some bytecode parsing. Ordinarily bytecode parsing requires the owning CodeBlock. It's sort of strange that we don't use it here right now. |
| UNUSED_PARAM(pc); |
| |
| switch (opcodeID) { |
| case op_wide: |
| RELEASE_ASSERT_NOT_REACHED(); |
| case op_enter: |
| case op_to_this: |
| case op_argument_count: |
| case op_check_tdz: |
| case op_create_this: |
| case op_bitnot: |
| case op_bitand: |
| case op_bitor: |
| case op_bitxor: |
| case op_rshift: |
| case op_lshift: |
| case op_urshift: |
| case op_unsigned: |
| case op_inc: |
| case op_dec: |
| case op_add: |
| case op_sub: |
| case op_negate: |
| case op_mul: |
| case op_mod: |
| case op_pow: |
| case op_div: |
| case op_debug: |
| case op_profile_type: |
| case op_profile_control_flow: |
| case op_mov: |
| case op_overrides_has_instance: |
| case op_identity_with_profile: |
| case op_instanceof: |
| case op_instanceof_custom: |
| case op_is_empty: |
| case op_is_undefined: |
| case op_is_boolean: |
| case op_is_number: |
| case op_is_object: |
| case op_is_object_or_null: |
| case op_is_cell_with_type: |
| case op_is_function: |
| case op_not: |
| case op_less: |
| case op_lesseq: |
| case op_greater: |
| case op_greatereq: |
| case op_below: |
| case op_beloweq: |
| case op_eq: |
| case op_eq_null: |
| case op_stricteq: |
| case op_neq: |
| case op_neq_null: |
| case op_nstricteq: |
| case op_get_by_val: |
| case op_put_by_val: |
| case op_put_by_val_direct: |
| case op_try_get_by_id: |
| case op_get_by_id: |
| case op_get_by_id_with_this: |
| case op_get_by_id_direct: |
| case op_get_by_val_with_this: |
| case op_put_by_id: |
| case op_put_by_id_with_this: |
| case op_put_by_val_with_this: |
| case op_put_getter_by_id: |
| case op_put_setter_by_id: |
| case op_put_getter_setter_by_id: |
| case op_put_getter_by_val: |
| case op_put_setter_by_val: |
| case op_define_data_property: |
| case op_define_accessor_property: |
| case op_del_by_id: |
| case op_del_by_val: |
| case op_jmp: |
| case op_jtrue: |
| case op_jfalse: |
| case op_jeq_null: |
| case op_jneq_null: |
| case op_jless: |
| case op_jlesseq: |
| case op_jgreater: |
| case op_jgreatereq: |
| case op_jnless: |
| case op_jnlesseq: |
| case op_jngreater: |
| case op_jngreatereq: |
| case op_jeq: |
| case op_jneq: |
| case op_jstricteq: |
| case op_jnstricteq: |
| case op_jbelow: |
| case op_jbeloweq: |
| case op_loop_hint: |
| case op_check_traps: |
| case op_nop: |
| case op_ret: |
| case op_end: |
| case op_new_object: |
| case op_new_array: |
| case op_new_array_with_size: |
| case op_new_array_buffer: |
| case op_new_array_with_spread: |
| case op_spread: |
| case op_strcat: |
| case op_to_primitive: |
| case op_throw: |
| case op_throw_static_error: |
| case op_call: |
| case op_tail_call: |
| case op_construct: |
| case op_call_varargs: |
| case op_tail_call_varargs: |
| case op_tail_call_forward_arguments: |
| case op_construct_varargs: |
| case op_create_direct_arguments: |
| case op_create_scoped_arguments: |
| case op_create_cloned_arguments: |
| case op_get_from_arguments: |
| case op_put_to_arguments: |
| case op_get_argument: |
| case op_jneq_ptr: |
| case op_typeof: |
| case op_to_number: |
| case op_to_string: |
| case op_to_object: |
| case op_switch_imm: |
| case op_switch_char: |
| case op_in_by_val: |
| case op_in_by_id: |
| case op_get_scope: |
| case op_get_from_scope: |
| case op_get_enumerable_length: |
| case op_has_generic_property: |
| case op_has_structure_property: |
| case op_has_indexed_property: |
| case op_get_direct_pname: |
| case op_get_property_enumerator: |
| case op_enumerator_structure_pname: |
| case op_enumerator_generic_pname: |
| case op_to_index_string: |
| case op_new_func: |
| case op_new_func_exp: |
| case op_new_generator_func: |
| case op_new_generator_func_exp: |
| case op_new_async_generator_func: |
| case op_new_async_generator_func_exp: |
| case op_new_async_func: |
| case op_new_async_func_exp: |
| case op_set_function_name: |
| case op_create_lexical_environment: |
| case op_push_with_scope: |
| case op_get_parent_scope: |
| case op_catch: |
| case op_create_rest: |
| case op_get_rest_length: |
| case op_log_shadow_chicken_prologue: |
| case op_log_shadow_chicken_tail: |
| case op_put_to_scope: |
| case op_resolve_scope: |
| case op_resolve_scope_for_hoisting_func_decl_in_eval: |
| case op_new_regexp: |
| case op_unreachable: |
| case op_super_sampler_begin: |
| case op_super_sampler_end: |
| return CanCompileAndInline; |
| |
| case op_switch_string: // Don't inline because we don't want to copy string tables in the concurrent JIT. |
| case op_call_eval: |
| return CanCompile; |
| |
| case op_yield: |
| case llint_program_prologue: |
| case llint_eval_prologue: |
| case llint_module_program_prologue: |
| case llint_function_for_call_prologue: |
| case llint_function_for_construct_prologue: |
| case llint_function_for_call_arity_check: |
| case llint_function_for_construct_arity_check: |
| case llint_generic_return_point: |
| case llint_throw_from_slow_path_trampoline: |
| case llint_throw_during_call_trampoline: |
| case llint_native_call_trampoline: |
| case llint_native_construct_trampoline: |
| case llint_internal_function_call_trampoline: |
| case llint_internal_function_construct_trampoline: |
| case handleUncaughtException: |
| return CannotCompile; |
| } |
| return CannotCompile; |
| } |
| |
| CapabilityLevel capabilityLevel(CodeBlock* codeBlock) |
| { |
| CapabilityLevel result = CanCompileAndInline; |
| |
| for (const auto& instruction : codeBlock->instructions()) { |
| switch (instruction->opcodeID()) { |
| #define DEFINE_OP(opcode, length) \ |
| case opcode: { \ |
| CapabilityLevel newResult = leastUpperBound(result, capabilityLevel(opcode, codeBlock, instruction.ptr())); \ |
| if (newResult != result) { \ |
| debugFail(codeBlock, opcode, newResult); \ |
| result = newResult; \ |
| } \ |
| break; \ |
| } |
| FOR_EACH_OPCODE_ID(DEFINE_OP) |
| #undef DEFINE_OP |
| default: |
| RELEASE_ASSERT_NOT_REACHED(); |
| break; |
| } |
| } |
| |
| return result; |
| } |
| |
| } } // namespace JSC::DFG |
| |
| #endif |
