Adding upstream version 124.0.1.upstream/124.0.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 176 insertions, 0 deletions

diff --git a/js/src/jit/BaselineCacheIRCompiler.h b/js/src/jit/BaselineCacheIRCompiler.h
new file mode 100644
index 0000000000..43b8141c0e
--- /dev/null
+++ b/js/src/jit/BaselineCacheIRCompiler.h
@@ -0,0 +1,176 @@
+/* -*- 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_BaselineCacheIRCompiler_h
+#define jit_BaselineCacheIRCompiler_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/Maybe.h"
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "jstypes.h"
+
+#include "jit/CacheIR.h"
+#include "jit/CacheIRCompiler.h"
+#include "jit/CacheIROpsGenerated.h"
+#include "jit/CacheIRReader.h"
+
+struct JS_PUBLIC_API JSContext;
+
+class JSScript;
+
+namespace js {
+namespace jit {
+
+class CacheIRWriter;
+class ICFallbackStub;
+class ICScript;
+class JitCode;
+class Label;
+class MacroAssembler;
+
+struct Address;
+struct Register;
+
+enum class ICAttachResult { Attached, DuplicateStub, TooLarge, OOM };
+
+bool TryFoldingStubs(JSContext* cx, ICFallbackStub* fallback, JSScript* script,
+                     ICScript* icScript);
+
+ICAttachResult AttachBaselineCacheIRStub(JSContext* cx,
+                                         const CacheIRWriter& writer,
+                                         CacheKind kind, JSScript* outerScript,
+                                         ICScript* icScript,
+                                         ICFallbackStub* stub,
+                                         const char* name);
+
+// BaselineCacheIRCompiler compiles CacheIR to BaselineIC native code.
+class MOZ_RAII BaselineCacheIRCompiler : public CacheIRCompiler {
+  bool makesGCCalls_;
+  uint8_t localTracingSlots_ = 0;
+  Register baselineFrameReg_ = FramePointer;
+
+  // This register points to the baseline frame of the caller. It should only
+  // be used before we enter a stub frame. This is normally the frame pointer
+  // register, but with --enable-ic-frame-pointers we have to allocate a
+  // separate register.
+  inline Register baselineFrameReg() {
+    MOZ_ASSERT(!enteredStubFrame_);
+    return baselineFrameReg_;
+  }
+
+  [[nodiscard]] bool emitStoreSlotShared(bool isFixed, ObjOperandId objId,
+                                         uint32_t offsetOffset,
+                                         ValOperandId rhsId);
+  [[nodiscard]] bool emitAddAndStoreSlotShared(
+      CacheOp op, ObjOperandId objId, uint32_t offsetOffset, ValOperandId rhsId,
+      uint32_t newShapeOffset, mozilla::Maybe<uint32_t> numNewSlotsOffset);
+
+  bool updateArgc(CallFlags flags, Register argcReg, Register scratch);
+  void loadStackObject(ArgumentKind kind, CallFlags flags, Register argcReg,
+                       Register dest);
+  void pushArguments(Register argcReg, Register calleeReg, Register scratch,
+                     Register scratch2, CallFlags flags, uint32_t argcFixed,
+                     bool isJitCall);
+  void pushStandardArguments(Register argcReg, Register scratch,
+                             Register scratch2, uint32_t argcFixed,
+                             bool isJitCall, bool isConstructing);
+  void pushArrayArguments(Register argcReg, Register scratch, Register scratch2,
+                          bool isJitCall, bool isConstructing);
+  void pushFunCallArguments(Register argcReg, Register calleeReg,
+                            Register scratch, Register scratch2,
+                            uint32_t argcFixed, bool isJitCall);
+  void pushFunApplyArgsObj(Register argcReg, Register calleeReg,
+                           Register scratch, Register scratch2, bool isJitCall);
+  void pushFunApplyNullUndefinedArguments(Register calleeReg, bool isJitCall);
+  void pushBoundFunctionArguments(Register argcReg, Register calleeReg,
+                                  Register scratch, Register scratch2,
+                                  CallFlags flags, uint32_t numBoundArgs,
+                                  bool isJitCall);
+  void createThis(Register argcReg, Register calleeReg, Register scratch,
+                  CallFlags flags, bool isBoundFunction);
+  template <typename T>
+  void storeThis(const T& newThis, Register argcReg, CallFlags flags);
+  void updateReturnValue();
+
+  enum class NativeCallType { Native, ClassHook };
+  bool emitCallNativeShared(NativeCallType callType, ObjOperandId calleeId,
+                            Int32OperandId argcId, CallFlags flags,
+                            uint32_t argcFixed,
+                            mozilla::Maybe<bool> ignoresReturnValue,
+                            mozilla::Maybe<uint32_t> targetOffset);
+
+  enum class StringCode { CodeUnit, CodePoint };
+  bool emitStringFromCodeResult(Int32OperandId codeId, StringCode stringCode);
+
+  enum class StringCharOutOfBounds { Failure, EmptyString, UndefinedValue };
+  bool emitLoadStringCharResult(StringOperandId strId, Int32OperandId indexId,
+                                StringCharOutOfBounds outOfBounds);
+
+  void emitAtomizeString(Register str, Register temp, Label* failure);
+
+  bool emitCallScriptedGetterShared(ValOperandId receiverId,
+                                    uint32_t getterOffset, bool sameRealm,
+                                    uint32_t nargsAndFlagsOffset,
+                                    mozilla::Maybe<uint32_t> icScriptOffset);
+  bool emitCallScriptedSetterShared(ObjOperandId receiverId,
+                                    uint32_t setterOffset, ValOperandId rhsId,
+                                    bool sameRealm,
+                                    uint32_t nargsAndFlagsOffset,
+                                    mozilla::Maybe<uint32_t> icScriptOffset);
+
+  template <typename IdType>
+  bool emitCallScriptedProxyGetShared(ValOperandId targetId,
+                                      ObjOperandId receiverId,
+                                      ObjOperandId handlerId,
+                                      uint32_t trapOffset, IdType id,
+                                      uint32_t nargsAndFlags);
+
+  BaselineICPerfSpewer perfSpewer_;
+
+ public:
+  BaselineICPerfSpewer& perfSpewer() { return perfSpewer_; }
+
+  friend class AutoStubFrame;
+
+  BaselineCacheIRCompiler(JSContext* cx, TempAllocator& alloc,
+                          const CacheIRWriter& writer, uint32_t stubDataOffset);
+
+  [[nodiscard]] bool init(CacheKind kind);
+
+  template <typename Fn, Fn fn>
+  void callVM(MacroAssembler& masm);
+
+  JitCode* compile();
+
+  bool makesGCCalls() const;
+  bool localTracingSlots() const { return localTracingSlots_; }
+
+  Address stubAddress(uint32_t offset) const;
+
+ private:
+  CACHE_IR_COMPILER_UNSHARED_GENERATED
+};
+
+// Special object used for storing a list of shapes to guard against. These are
+// only used in the fields of CacheIR stubs and do not escape.
+class ShapeListObject : public ListObject {
+ public:
+  static const JSClass class_;
+  static const JSClassOps classOps_;
+  static ShapeListObject* create(JSContext* cx);
+  static void trace(JSTracer* trc, JSObject* obj);
+
+  Shape* get(uint32_t index);
+  bool traceWeak(JSTracer* trc);
+};
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_BaselineCacheIRCompiler_h */