The Tor Browser / file comparison
comparison: js/src/jit/JitOptions.cpp
js/src/jit/JitOptions.cpp
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:c021905f2023 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "jit/JitOptions.h" | |
| 8 | |
| 9 #include "jsscript.h" | |
| 10 | |
| 11 using namespace js; | |
| 12 using namespace js::jit; | |
| 13 | |
| 14 namespace js { | |
| 15 namespace jit { | |
| 16 | |
| 17 JitOptions js_JitOptions; | |
| 18 | |
| 19 JitOptions::JitOptions() | |
| 20 { | |
| 21 // Whether to perform expensive graph-consistency DEBUG-only assertions. | |
| 22 // It can be useful to disable this to reduce DEBUG-compile time of large | |
| 23 // asm.js programs. | |
| 24 checkGraphConsistency = true; | |
| 25 | |
| 26 #ifdef CHECK_OSIPOINT_REGISTERS | |
| 27 // Emit extra code to verify live regs at the start of a VM call | |
| 28 // are not modified before its OsiPoint. | |
| 29 checkOsiPointRegisters = false; | |
| 30 #endif | |
| 31 | |
| 32 // Whether to enable extra code to perform dynamic validation of | |
| 33 // RangeAnalysis results. | |
| 34 checkRangeAnalysis = false; | |
| 35 | |
| 36 // Whether Ion should compile try-catch statements. | |
| 37 compileTryCatch = true; | |
| 38 | |
| 39 // Toggle whether global value numbering is globally disabled. | |
| 40 disableGvn = false; | |
| 41 | |
| 42 // Toggles whether loop invariant code motion is globally disabled. | |
| 43 disableLicm = false; | |
| 44 | |
| 45 // Toggles whether inlining is globally disabled. | |
| 46 disableInlining = false; | |
| 47 | |
| 48 // Toggles whether Edge Case Analysis is gobally disabled. | |
| 49 disableEdgeCaseAnalysis = false; | |
| 50 | |
| 51 // Toggles whether Range Analysis is globally disabled. | |
| 52 disableRangeAnalysis = false; | |
| 53 | |
| 54 // Toggles whether Unreachable Code Elimination is globally disabled. | |
| 55 disableUce = false; | |
| 56 | |
| 57 // Toggles whether Effective Address Analysis is globally disabled. | |
| 58 disableEaa = false; | |
| 59 | |
| 60 // Whether functions are compiled immediately. | |
| 61 eagerCompilation = false; | |
| 62 | |
| 63 // Force how many invocation or loop iterations are needed before compiling | |
| 64 // a function with the highest ionmonkey optimization level. | |
| 65 // (i.e. OptimizationLevel_Normal) | |
| 66 forceDefaultIonUsesBeforeCompile = false; | |
| 67 forcedDefaultIonUsesBeforeCompile = 1000; | |
| 68 | |
| 69 // Force the GVN kind to be optimistic or pessimistic instead of letting | |
| 70 // the optimization pass decide. | |
| 71 forceGvnKind = false; | |
| 72 forcedGvnKind = GVN_Optimistic; | |
| 73 | |
| 74 // Force the used register allocator instead of letting the | |
| 75 // optimization pass decide. | |
| 76 forceRegisterAllocator = false; | |
| 77 forcedRegisterAllocator = RegisterAllocator_LSRA; | |
| 78 | |
| 79 // Toggles whether large scripts are rejected. | |
| 80 limitScriptSize = true; | |
| 81 | |
| 82 // Toggles whether functions may be entered at loop headers. | |
| 83 osr = true; | |
| 84 | |
| 85 // How many invocations or loop iterations are needed before functions | |
| 86 // are compiled with the baseline compiler. | |
| 87 baselineUsesBeforeCompile = 10; | |
| 88 | |
| 89 // Number of exception bailouts (resuming into catch/finally block) before | |
| 90 // we invalidate and forbid Ion compilation. | |
| 91 exceptionBailoutThreshold = 10; | |
| 92 | |
| 93 // Number of bailouts without invalidation before we set | |
| 94 // JSScript::hadFrequentBailouts and invalidate. | |
| 95 frequentBailoutThreshold = 10; | |
| 96 | |
| 97 // How many actual arguments are accepted on the C stack. | |
| 98 maxStackArgs = 4096; | |
| 99 | |
| 100 // How many times we will try to enter a script via OSR before | |
| 101 // invalidating the script. | |
| 102 osrPcMismatchesBeforeRecompile = 6000; | |
| 103 | |
| 104 // The bytecode length limit for small function. | |
| 105 // | |
| 106 // The default for this was arrived at empirically via benchmarking. | |
| 107 // We may want to tune it further after other optimizations have gone | |
| 108 // in. | |
| 109 smallFunctionMaxBytecodeLength_ = 100; | |
| 110 | |
| 111 // How many uses of a parallel kernel before we attempt compilation. | |
| 112 usesBeforeCompilePar = 1; | |
| 113 | |
| 114 // Whether to profile inlined functions in Ion or not. | |
| 115 profileInlineFrames = false; | |
| 116 } | |
| 117 | |
| 118 bool | |
| 119 JitOptions::isSmallFunction(JSScript *script) const | |
| 120 { | |
| 121 return script->length() <= smallFunctionMaxBytecodeLength_; | |
| 122 } | |
| 123 | |
| 124 void | |
| 125 JitOptions::setEagerCompilation() | |
| 126 { | |
| 127 eagerCompilation = true; | |
| 128 baselineUsesBeforeCompile = 0; | |
| 129 forceDefaultIonUsesBeforeCompile = true; | |
| 130 forcedDefaultIonUsesBeforeCompile = 0; | |
| 131 } | |
| 132 | |
| 133 void | |
| 134 JitOptions::setUsesBeforeCompile(uint32_t useCount) | |
| 135 { | |
| 136 forceDefaultIonUsesBeforeCompile = true; | |
| 137 forcedDefaultIonUsesBeforeCompile = useCount; | |
| 138 | |
| 139 // Undo eager compilation | |
| 140 if (eagerCompilation && useCount != 0) { | |
| 141 jit::JitOptions defaultValues; | |
| 142 eagerCompilation = false; | |
| 143 baselineUsesBeforeCompile = defaultValues.baselineUsesBeforeCompile; | |
| 144 } | |
| 145 } | |
| 146 | |
| 147 void | |
| 148 JitOptions::resetUsesBeforeCompile() | |
| 149 { | |
| 150 forceDefaultIonUsesBeforeCompile = false; | |
| 151 | |
| 152 // Undo eager compilation | |
| 153 if (eagerCompilation) { | |
| 154 jit::JitOptions defaultValues; | |
| 155 eagerCompilation = false; | |
| 156 baselineUsesBeforeCompile = defaultValues.baselineUsesBeforeCompile; | |
| 157 } | |
| 158 } | |
| 159 | |
| 160 } // namespace jit | |
| 161 } // namespace js |
