1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit/BaselineInspector.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,129 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sts=4 et sw=4 tw=99:
1.6 + * This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef jit_BaselineInspector_h
1.11 +#define jit_BaselineInspector_h
1.12 +
1.13 +#ifdef JS_ION
1.14 +
1.15 +#include "jit/BaselineIC.h"
1.16 +#include "jit/BaselineJIT.h"
1.17 +#include "jit/MIR.h"
1.18 +
1.19 +namespace js {
1.20 +namespace jit {
1.21 +
1.22 +class BaselineInspector;
1.23 +
1.24 +class ICInspector
1.25 +{
1.26 + protected:
1.27 + BaselineInspector *inspector_;
1.28 + jsbytecode *pc_;
1.29 + ICEntry *icEntry_;
1.30 +
1.31 + ICInspector(BaselineInspector *inspector, jsbytecode *pc, ICEntry *icEntry)
1.32 + : inspector_(inspector), pc_(pc), icEntry_(icEntry)
1.33 + { }
1.34 +};
1.35 +
1.36 +class SetElemICInspector : public ICInspector
1.37 +{
1.38 + public:
1.39 + SetElemICInspector(BaselineInspector *inspector, jsbytecode *pc, ICEntry *icEntry)
1.40 + : ICInspector(inspector, pc, icEntry)
1.41 + { }
1.42 +
1.43 + bool sawOOBDenseWrite() const;
1.44 + bool sawOOBTypedArrayWrite() const;
1.45 + bool sawDenseWrite() const;
1.46 + bool sawTypedArrayWrite() const;
1.47 +};
1.48 +
1.49 +class BaselineInspector
1.50 +{
1.51 + private:
1.52 + JSScript *script;
1.53 + ICEntry *prevLookedUpEntry;
1.54 +
1.55 + public:
1.56 + BaselineInspector(JSScript *script)
1.57 + : script(script), prevLookedUpEntry(nullptr)
1.58 + {
1.59 + JS_ASSERT(script);
1.60 + }
1.61 +
1.62 + bool hasBaselineScript() const {
1.63 + return script->hasBaselineScript();
1.64 + }
1.65 +
1.66 + BaselineScript *baselineScript() const {
1.67 + return script->baselineScript();
1.68 + }
1.69 +
1.70 + private:
1.71 +#ifdef DEBUG
1.72 + bool isValidPC(jsbytecode *pc) {
1.73 + return script->containsPC(pc);
1.74 + }
1.75 +#endif
1.76 +
1.77 + ICEntry &icEntryFromPC(jsbytecode *pc) {
1.78 + JS_ASSERT(hasBaselineScript());
1.79 + JS_ASSERT(isValidPC(pc));
1.80 + ICEntry &ent = baselineScript()->icEntryFromPCOffset(script->pcToOffset(pc), prevLookedUpEntry);
1.81 + JS_ASSERT(ent.isForOp());
1.82 + prevLookedUpEntry = &ent;
1.83 + return ent;
1.84 + }
1.85 +
1.86 + template <typename ICInspectorType>
1.87 + ICInspectorType makeICInspector(jsbytecode *pc, ICStub::Kind expectedFallbackKind) {
1.88 + ICEntry *ent = nullptr;
1.89 + if (hasBaselineScript()) {
1.90 + ent = &icEntryFromPC(pc);
1.91 + JS_ASSERT(ent->fallbackStub()->kind() == expectedFallbackKind);
1.92 + }
1.93 + return ICInspectorType(this, pc, ent);
1.94 + }
1.95 +
1.96 + ICStub *monomorphicStub(jsbytecode *pc);
1.97 + bool dimorphicStub(jsbytecode *pc, ICStub **pfirst, ICStub **psecond);
1.98 +
1.99 + public:
1.100 + typedef Vector<Shape *, 4, IonAllocPolicy> ShapeVector;
1.101 + bool maybeShapesForPropertyOp(jsbytecode *pc, ShapeVector &shapes);
1.102 +
1.103 + SetElemICInspector setElemICInspector(jsbytecode *pc) {
1.104 + return makeICInspector<SetElemICInspector>(pc, ICStub::SetElem_Fallback);
1.105 + }
1.106 +
1.107 + MIRType expectedResultType(jsbytecode *pc);
1.108 + MCompare::CompareType expectedCompareType(jsbytecode *pc);
1.109 + MIRType expectedBinaryArithSpecialization(jsbytecode *pc);
1.110 +
1.111 + bool hasSeenNonNativeGetElement(jsbytecode *pc);
1.112 + bool hasSeenNegativeIndexGetElement(jsbytecode *pc);
1.113 + bool hasSeenAccessedGetter(jsbytecode *pc);
1.114 + bool hasSeenDoubleResult(jsbytecode *pc);
1.115 + bool hasSeenNonStringIterNext(jsbytecode *pc);
1.116 +
1.117 + JSObject *getTemplateObject(jsbytecode *pc);
1.118 + JSObject *getTemplateObjectForNative(jsbytecode *pc, Native native);
1.119 +
1.120 + DeclEnvObject *templateDeclEnvObject();
1.121 + CallObject *templateCallObject();
1.122 +
1.123 + JSObject *commonGetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonGetter);
1.124 + JSObject *commonSetPropFunction(jsbytecode *pc, Shape **lastProperty, JSFunction **commonSetter);
1.125 +};
1.126 +
1.127 +} // namespace jit
1.128 +} // namespace js
1.129 +
1.130 +#endif // JS_ION
1.131 +
1.132 +#endif /* jit_BaselineInspector_h */
