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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /js/src/jit/KnownClass.cpp | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/jit/KnownClass.cpp | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/js/src/jit/KnownClass.cpp b/js/src/jit/KnownClass.cpp new file mode 100644 index 0000000000..fcb7715f5f --- /dev/null +++ b/js/src/jit/KnownClass.cpp @@ -0,0 +1,109 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * vim: set ts=8 sts=2 et sw=2 tw=80: + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "jit/KnownClass.h" + +#include "jit/MIR.h" +#include "vm/ArrayObject.h" +#include "vm/Iteration.h" +#include "vm/JSFunction.h" +#include "vm/PlainObject.h" // js::PlainObject +#include "vm/RegExpObject.h" + +using namespace js; +using namespace js::jit; + +KnownClass jit::GetObjectKnownClass(const MDefinition* def) { + MOZ_ASSERT(def->type() == MIRType::Object); + + switch (def->op()) { + case MDefinition::Opcode::NewArray: + case MDefinition::Opcode::NewArrayDynamicLength: + case MDefinition::Opcode::NewArrayObject: + case MDefinition::Opcode::Rest: + case MDefinition::Opcode::ArgumentsSlice: + case MDefinition::Opcode::FrameArgumentsSlice: + case MDefinition::Opcode::InlineArgumentsSlice: + return KnownClass::Array; + + case MDefinition::Opcode::NewObject: + case MDefinition::Opcode::NewPlainObject: + case MDefinition::Opcode::CreateThis: + return KnownClass::PlainObject; + + case MDefinition::Opcode::Lambda: + case MDefinition::Opcode::FunctionWithProto: + return KnownClass::Function; + + case MDefinition::Opcode::RegExp: + return KnownClass::RegExp; + + case MDefinition::Opcode::NewIterator: + switch (def->toNewIterator()->type()) { + case MNewIterator::ArrayIterator: + return KnownClass::ArrayIterator; + case MNewIterator::StringIterator: + return KnownClass::StringIterator; + case MNewIterator::RegExpStringIterator: + return KnownClass::RegExpStringIterator; + } + MOZ_CRASH("unreachable"); + + case MDefinition::Opcode::Phi: { + if (def->numOperands() == 0) { + return KnownClass::None; + } + + MDefinition* op = def->getOperand(0); + // Check for Phis to avoid recursion for now. + if (op->isPhi()) { + return KnownClass::None; + } + + KnownClass known = GetObjectKnownClass(op); + if (known == KnownClass::None) { + return KnownClass::None; + } + + for (size_t i = 1; i < def->numOperands(); i++) { + op = def->getOperand(i); + if (op->isPhi() || GetObjectKnownClass(op) != known) { + return KnownClass::None; + } + } + + return known; + } + + default: + break; + } + + return KnownClass::None; +} + +const JSClass* jit::GetObjectKnownJSClass(const MDefinition* def) { + switch (GetObjectKnownClass(def)) { + case KnownClass::PlainObject: + return &PlainObject::class_; + case KnownClass::Array: + return &ArrayObject::class_; + case KnownClass::Function: + return &FunctionClass; + case KnownClass::RegExp: + return &RegExpObject::class_; + case KnownClass::ArrayIterator: + return &ArrayIteratorObject::class_; + case KnownClass::StringIterator: + return &StringIteratorObject::class_; + case KnownClass::RegExpStringIterator: + return &RegExpStringIteratorObject::class_; + case KnownClass::None: + break; + } + + return nullptr; +} |