Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 4 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 5 | #include "src/codegen.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 6 | |
| 7 | #if defined(V8_OS_AIX) |
| 8 | #include <fenv.h> // NOLINT(build/c++11) |
| 9 | #endif |
| 10 | #include "src/ast/prettyprinter.h" |
| 11 | #include "src/bootstrapper.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 12 | #include "src/compiler.h" |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 13 | #include "src/debug/debug.h" |
| 14 | #include "src/parsing/parser.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 15 | #include "src/runtime/runtime.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 16 | |
| 17 | namespace v8 { |
| 18 | namespace internal { |
| 19 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 20 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 21 | #if defined(V8_OS_WIN) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 22 | double modulo(double x, double y) { |
| 23 | // Workaround MS fmod bugs. ECMA-262 says: |
| 24 | // dividend is finite and divisor is an infinity => result equals dividend |
| 25 | // dividend is a zero and divisor is nonzero finite => result equals dividend |
| 26 | if (!(std::isfinite(x) && (!std::isfinite(y) && !std::isnan(y))) && |
| 27 | !(x == 0 && (y != 0 && std::isfinite(y)))) { |
| 28 | x = fmod(x, y); |
| 29 | } |
| 30 | return x; |
| 31 | } |
| 32 | #else // POSIX |
| 33 | |
| 34 | double modulo(double x, double y) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 35 | #if defined(V8_OS_AIX) |
| 36 | // AIX raises an underflow exception for (Number.MIN_VALUE % Number.MAX_VALUE) |
| 37 | feclearexcept(FE_ALL_EXCEPT); |
| 38 | double result = std::fmod(x, y); |
| 39 | int exception = fetestexcept(FE_UNDERFLOW); |
| 40 | return (exception ? x : result); |
| 41 | #else |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 42 | return std::fmod(x, y); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 43 | #endif |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 44 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 45 | #endif // defined(V8_OS_WIN) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 46 | |
| 47 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 48 | #define UNARY_MATH_FUNCTION(name, generator) \ |
| 49 | static UnaryMathFunctionWithIsolate fast_##name##_function = nullptr; \ |
| 50 | double std_##name(double x, Isolate* isolate) { return std::name(x); } \ |
| 51 | void init_fast_##name##_function(Isolate* isolate) { \ |
| 52 | if (FLAG_fast_math) fast_##name##_function = generator(isolate); \ |
| 53 | if (!fast_##name##_function) fast_##name##_function = std_##name; \ |
| 54 | } \ |
| 55 | void lazily_initialize_fast_##name(Isolate* isolate) { \ |
| 56 | if (!fast_##name##_function) init_fast_##name##_function(isolate); \ |
| 57 | } \ |
| 58 | double fast_##name(double x, Isolate* isolate) { \ |
| 59 | return (*fast_##name##_function)(x, isolate); \ |
| 60 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 61 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 62 | UNARY_MATH_FUNCTION(sqrt, CreateSqrtFunction) |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 63 | |
| 64 | #undef UNARY_MATH_FUNCTION |
| 65 | |
| 66 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 67 | #define __ ACCESS_MASM(masm_) |
| 68 | |
| 69 | #ifdef DEBUG |
| 70 | |
| 71 | Comment::Comment(MacroAssembler* masm, const char* msg) |
| 72 | : masm_(masm), msg_(msg) { |
| 73 | __ RecordComment(msg); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | Comment::~Comment() { |
| 78 | if (msg_[0] == '[') __ RecordComment("]"); |
| 79 | } |
| 80 | |
| 81 | #endif // DEBUG |
| 82 | |
| 83 | #undef __ |
| 84 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 85 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 86 | void CodeGenerator::MakeCodePrologue(CompilationInfo* info, const char* kind) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 87 | bool print_source = false; |
| 88 | bool print_ast = false; |
| 89 | const char* ftype; |
| 90 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 91 | if (info->isolate()->bootstrapper()->IsActive()) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 92 | print_source = FLAG_print_builtin_source; |
| 93 | print_ast = FLAG_print_builtin_ast; |
| 94 | ftype = "builtin"; |
| 95 | } else { |
| 96 | print_source = FLAG_print_source; |
| 97 | print_ast = FLAG_print_ast; |
| 98 | ftype = "user-defined"; |
| 99 | } |
| 100 | |
| 101 | if (FLAG_trace_codegen || print_source || print_ast) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 102 | base::SmartArrayPointer<char> name = info->GetDebugName(); |
| 103 | PrintF("[generating %s code for %s function: %s]\n", kind, ftype, |
| 104 | name.get()); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 105 | } |
| 106 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 107 | #ifdef DEBUG |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 108 | if (info->parse_info() && print_source) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 109 | PrintF("--- Source from AST ---\n%s\n", |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 110 | PrettyPrinter(info->isolate()).PrintProgram(info->literal())); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 111 | } |
| 112 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 113 | if (info->parse_info() && print_ast) { |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 114 | PrintF("--- AST ---\n%s\n", |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 115 | AstPrinter(info->isolate()).PrintProgram(info->literal())); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 116 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 117 | #endif // DEBUG |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 118 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 119 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 120 | |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 121 | Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm, |
Andrei Popescu | 3100271 | 2010-02-23 13:46:05 +0000 | [diff] [blame] | 122 | CompilationInfo* info) { |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 123 | Isolate* isolate = info->isolate(); |
| 124 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 125 | // Allocate and install the code. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 126 | CodeDesc desc; |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 127 | Code::Flags flags = info->code_flags(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 128 | bool is_crankshafted = |
| 129 | Code::ExtractKindFromFlags(flags) == Code::OPTIMIZED_FUNCTION || |
| 130 | info->IsStub(); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 131 | masm->GetCode(&desc); |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 132 | Handle<Code> code = |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 133 | isolate->factory()->NewCode(desc, flags, masm->CodeObject(), |
| 134 | false, is_crankshafted, |
| 135 | info->prologue_offset(), |
| 136 | info->is_debug() && !is_crankshafted); |
| 137 | isolate->counters()->total_compiled_code_size()->Increment( |
| 138 | code->instruction_size()); |
| 139 | isolate->heap()->IncrementCodeGeneratedBytes(is_crankshafted, |
| 140 | code->instruction_size()); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 141 | return code; |
| 142 | } |
| 143 | |
| 144 | |
| 145 | void CodeGenerator::PrintCode(Handle<Code> code, CompilationInfo* info) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 146 | #ifdef ENABLE_DISASSEMBLER |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 147 | AllowDeferredHandleDereference allow_deference_for_print_code; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 148 | Isolate* isolate = info->isolate(); |
| 149 | bool print_code = |
| 150 | isolate->bootstrapper()->IsActive() |
| 151 | ? FLAG_print_builtin_code |
| 152 | : (FLAG_print_code || (info->IsStub() && FLAG_print_code_stubs) || |
| 153 | (info->IsOptimizing() && FLAG_print_opt_code)); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame] | 154 | if (print_code) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 155 | base::SmartArrayPointer<char> debug_name = info->GetDebugName(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 156 | CodeTracer::Scope tracing_scope(info->isolate()->GetCodeTracer()); |
| 157 | OFStream os(tracing_scope.file()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 158 | |
| 159 | // Print the source code if available. |
| 160 | bool print_source = |
| 161 | info->parse_info() && (code->kind() == Code::OPTIMIZED_FUNCTION || |
| 162 | code->kind() == Code::FUNCTION); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 163 | if (print_source) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 164 | Handle<SharedFunctionInfo> shared = info->shared_info(); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 165 | Handle<Script> script = info->script(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 166 | if (!script->IsUndefined(isolate) && |
| 167 | !script->source()->IsUndefined(isolate)) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 168 | os << "--- Raw source ---\n"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 169 | StringCharacterStream stream(String::cast(script->source()), |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 170 | shared->start_position()); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 171 | // fun->end_position() points to the last character in the stream. We |
| 172 | // need to compensate by adding one to calculate the length. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 173 | int source_len = shared->end_position() - shared->start_position() + 1; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 174 | for (int i = 0; i < source_len; i++) { |
| 175 | if (stream.HasMore()) { |
| 176 | os << AsReversiblyEscapedUC16(stream.GetNext()); |
| 177 | } |
| 178 | } |
| 179 | os << "\n\n"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 180 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 181 | } |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 182 | if (info->IsOptimizing()) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 183 | if (FLAG_print_unopt_code && info->parse_info()) { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 184 | os << "--- Unoptimized code ---\n"; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 185 | info->closure()->shared()->code()->Disassemble(debug_name.get(), os); |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 186 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 187 | os << "--- Optimized code ---\n" |
| 188 | << "optimization_id = " << info->optimization_id() << "\n"; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 189 | } else { |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 190 | os << "--- Code ---\n"; |
Ben Murdoch | b0fe162 | 2011-05-05 13:52:32 +0100 | [diff] [blame] | 191 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 192 | if (print_source) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 193 | Handle<SharedFunctionInfo> shared = info->shared_info(); |
| 194 | os << "source_position = " << shared->start_position() << "\n"; |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 195 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 196 | code->Disassemble(debug_name.get(), os); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 197 | os << "--- End code ---\n"; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 198 | } |
| 199 | #endif // ENABLE_DISASSEMBLER |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 200 | } |
| 201 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 202 | } // namespace internal |
| 203 | } // namespace v8 |