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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/jit/InlineScriptTree.h | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | js/src/jit/InlineScriptTree.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/js/src/jit/InlineScriptTree.h b/js/src/jit/InlineScriptTree.h new file mode 100644 index 0000000000..0e5e2767ff --- /dev/null +++ b/js/src/jit/InlineScriptTree.h @@ -0,0 +1,112 @@ +/* -*- 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/. */ + +#ifndef jit_InlineScriptTree_h +#define jit_InlineScriptTree_h + +#include "mozilla/Assertions.h" + +#include "jit/JitAllocPolicy.h" +#include "js/TypeDecls.h" + +namespace js { +namespace jit { + +// The compiler at various points needs to be able to store references to the +// current inline path (the sequence of scripts and call-pcs that lead to the +// current function being inlined). +// +// To support this, use a tree that records the inlinings done during +// compilation. +class InlineScriptTree { + // InlineScriptTree for the caller + InlineScriptTree* caller_; + + // PC in the caller corresponding to this script. + jsbytecode* callerPc_; + + // Script for this entry. + JSScript* script_; + + // Child entries (linked together by nextCallee pointer) + InlineScriptTree* children_; + InlineScriptTree* nextCallee_; + + public: + InlineScriptTree(InlineScriptTree* caller, jsbytecode* callerPc, + JSScript* script) + : caller_(caller), + callerPc_(callerPc), + script_(script), + children_(nullptr), + nextCallee_(nullptr) {} + + static inline InlineScriptTree* New(TempAllocator* allocator, + InlineScriptTree* caller, + jsbytecode* callerPc, JSScript* script); + + inline InlineScriptTree* addCallee(TempAllocator* allocator, + jsbytecode* callerPc, + JSScript* calleeScript); + inline void removeCallee(InlineScriptTree* callee); + + InlineScriptTree* caller() const { return caller_; } + + bool isOutermostCaller() const { return caller_ == nullptr; } + bool hasCaller() const { return caller_ != nullptr; } + + jsbytecode* callerPc() const { return callerPc_; } + + JSScript* script() const { return script_; } + + bool hasChildren() const { return children_ != nullptr; } + InlineScriptTree* firstChild() const { + MOZ_ASSERT(hasChildren()); + return children_; + } + + bool hasNextCallee() const { return nextCallee_ != nullptr; } + InlineScriptTree* nextCallee() const { + MOZ_ASSERT(hasNextCallee()); + return nextCallee_; + } + + unsigned depth() const { + if (isOutermostCaller()) { + return 1; + } + return 1 + caller_->depth(); + } +}; + +class BytecodeSite : public TempObject { + // InlineScriptTree identifying innermost active function at site. + InlineScriptTree* tree_; + + // Bytecode address within innermost active function. + jsbytecode* pc_; + + public: + // Wasm compilation leaves both fields null. + BytecodeSite() : tree_(nullptr), pc_(nullptr) {} + + // Warp compilation sets both fields to non-null values. + BytecodeSite(InlineScriptTree* tree, jsbytecode* pc) : tree_(tree), pc_(pc) { + MOZ_ASSERT(tree_ != nullptr); + MOZ_ASSERT(pc_ != nullptr); + } + + InlineScriptTree* tree() const { return tree_; } + + jsbytecode* pc() const { return pc_; } + + JSScript* script() const { return tree_ ? tree_->script() : nullptr; } +}; + +} // namespace jit +} // namespace js + +#endif /* jit_InlineScriptTree_h */ |