Revert "git apply WebKit/pull/51369"

This reverts commit 69fa271.

Author: Jarred-Sumner

Source/JavaScriptCore/heap/MachineStackMarker.cpp

@@ -59,16 +59,8 @@ static inline int osRedZoneAdjustment()
     // See http://people.freebsd.org/~obrien/amd64-elf-abi.pdf Section 3.2.2.
     redZoneAdjustment = -128;
 #elif CPU(ARM64)
-#if OS(DARWIN)
     // See https://developer.apple.com/library/ios/documentation/Xcode/Conceptual/iPhoneOSABIReference/Articles/ARM64FunctionCallingConventions.html#//apple_ref/doc/uid/TP40013702-SW7
     redZoneAdjustment = -128;
-#elif OS(WINDOWS)
-    // https://devblogs.microsoft.com/oldnewthing/20220726-00/?p=106898
-    redZoneAdjustment = -16;
-#else
-    // There is no red zone.
-    // https://stackoverflow.com/questions/77908878/aarch64-is-there-a-red-zone-on-linux-if-so-16-or-128-bytes
-#endif
 #endif
     return redZoneAdjustment;
 }

Source/JavaScriptCore/wasm/WasmBBQJIT.cpp

@@ -3151,7 +3151,7 @@ ControlData WARN_UNUSED_RETURN BBQJIT::addTopLevel(BlockSignature signature)
 
     m_pcToCodeOriginMapBuilder.appendItem(m_jit.label(), PCToCodeOriginMapBuilder::defaultCodeOrigin());
     m_jit.emitFunctionPrologue();
-    emitPushCalleeSaves();
+    emitSaveCalleeSaves();
     m_topLevel = ControlData(*this, BlockType::TopLevel, signature, 0);
 
     JIT_COMMENT(m_jit, "Store boxed JIT callee");
@@ -3332,7 +3332,7 @@ MacroAssembler::Label BBQJIT::addLoopOSREntrypoint()
     //  - Don't need to zero our locals, since they are restored from the OSR entry scratch buffer anyway.
     auto label = m_jit.label();
     m_jit.emitFunctionPrologue();
-    emitPushCalleeSaves();
+    emitSaveCalleeSaves();
 
     m_jit.move(CCallHelpers::TrustedImmPtr(CalleeBits::boxNativeCallee(&m_callee)), wasmScratchGPR);
     static_assert(CallFrameSlot::codeBlock + 1 == CallFrameSlot::callee);
@@ -5318,15 +5318,8 @@ Expected<std::unique_ptr<InternalFunction>, String> parseAndCompileBBQ(Compilati
     return result;
 }
 
-void BBQJIT::emitPushCalleeSaves()
+void BBQJIT::emitSaveCalleeSaves()
 {
-    size_t stackSizeForCalleeSaves = WTF::roundUpToMultipleOf<stackAlignmentBytes()>(RegisterAtOffsetList::bbqCalleeSaveRegisters().registerCount() * sizeof(UCPURegister));
-#if CPU(X86_64) || CPU(ARM64)
-    m_jit.subPtr(GPRInfo::callFrameRegister, TrustedImm32(stackSizeForCalleeSaves), MacroAssembler::stackPointerRegister);
-#else
-    m_jit.subPtr(GPRInfo::callFrameRegister, TrustedImm32(stackSizeForCalleeSaves), wasmScratchGPR);
-    m_jit.move(wasmScratchGPR, MacroAssembler::stackPointerRegister);
-#endif
     m_jit.emitSaveCalleeSavesFor(&RegisterAtOffsetList::bbqCalleeSaveRegisters());
 }
 

Source/JavaScriptCore/wasm/WasmBBQJIT.h

@@ -2230,7 +2230,7 @@ class BBQJIT {
 
     void emitIncrementCallProfileCount(unsigned callProfileIndex);
 
-    void emitPushCalleeSaves();
+    void emitSaveCalleeSaves();
     void emitRestoreCalleeSaves();
 
     WasmOrigin origin();