1 files changed, 115 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/AsmPrinter/WinException.h b/contrib/llvm-project/llvm/lib/CodeGen/AsmPrinter/WinException.h
new file mode 100644
index 000000000000..dc5036302131
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/CodeGen/AsmPrinter/WinException.h
@@ -0,0 +1,115 @@
+//===-- WinException.h - Windows Exception Handling ----------*- C++ -*--===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing windows exception info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_WIN64EXCEPTION_H
+#define LLVM_LIB_CODEGEN_ASMPRINTER_WIN64EXCEPTION_H
+
+#include "EHStreamer.h"
+
+namespace llvm {
+class Function;
+class GlobalValue;
+class MachineFunction;
+class MCExpr;
+class MCSection;
+class Value;
+struct WinEHFuncInfo;
+
+class LLVM_LIBRARY_VISIBILITY WinException : public EHStreamer {
+  /// Per-function flag to indicate if personality info should be emitted.
+  bool shouldEmitPersonality = false;
+
+  /// Per-function flag to indicate if the LSDA should be emitted.
+  bool shouldEmitLSDA = false;
+
+  /// Per-function flag to indicate if frame moves info should be emitted.
+  bool shouldEmitMoves = false;
+
+  /// True if this is a 64-bit target and we should use image relative offsets.
+  bool useImageRel32 = false;
+
+  /// True if we are generating exception handling on Windows for ARM64.
+  bool isAArch64 = false;
+
+  /// Pointer to the current funclet entry BB.
+  const MachineBasicBlock *CurrentFuncletEntry = nullptr;
+
+  /// The section of the last funclet start.
+  MCSection *CurrentFuncletTextSection = nullptr;
+
+  void emitCSpecificHandlerTable(const MachineFunction *MF);
+
+  void emitSEHActionsForRange(const WinEHFuncInfo &FuncInfo,
+                              const MCSymbol *BeginLabel,
+                              const MCSymbol *EndLabel, int State);
+
+  /// Emit the EH table data for 32-bit and 64-bit functions using
+  /// the __CxxFrameHandler3 personality.
+  void emitCXXFrameHandler3Table(const MachineFunction *MF);
+
+  /// Emit the EH table data for _except_handler3 and _except_handler4
+  /// personality functions. These are only used on 32-bit and do not use CFI
+  /// tables.
+  void emitExceptHandlerTable(const MachineFunction *MF);
+
+  void emitCLRExceptionTable(const MachineFunction *MF);
+
+  void computeIP2StateTable(
+      const MachineFunction *MF, const WinEHFuncInfo &FuncInfo,
+      SmallVectorImpl<std::pair<const MCExpr *, int>> &IPToStateTable);
+
+  /// Emits the label used with llvm.eh.recoverfp, which is used by
+  /// outlined funclets.
+  void emitEHRegistrationOffsetLabel(const WinEHFuncInfo &FuncInfo,
+                                     StringRef FLinkageName);
+
+  const MCExpr *create32bitRef(const MCSymbol *Value);
+  const MCExpr *create32bitRef(const GlobalValue *GV);
+  const MCExpr *getLabel(const MCSymbol *Label);
+  const MCExpr *getOffset(const MCSymbol *OffsetOf, const MCSymbol *OffsetFrom);
+  const MCExpr *getOffsetPlusOne(const MCSymbol *OffsetOf,
+                                 const MCSymbol *OffsetFrom);
+
+  /// Gets the offset that we should use in a table for a stack object with the
+  /// given index. For targets using CFI (Win64, etc), this is relative to the
+  /// established SP at the end of the prologue. For targets without CFI (Win32
+  /// only), it is relative to the frame pointer.
+  int getFrameIndexOffset(int FrameIndex, const WinEHFuncInfo &FuncInfo);
+
+  void endFuncletImpl();
+public:
+  //===--------------------------------------------------------------------===//
+  // Main entry points.
+  //
+  WinException(AsmPrinter *A);
+  ~WinException() override;
+
+  /// Emit all exception information that should come after the content.
+  void endModule() override;
+
+  /// Gather pre-function exception information.  Assumes being emitted
+  /// immediately after the function entry point.
+  void beginFunction(const MachineFunction *MF) override;
+
+  void markFunctionEnd() override;
+
+  /// Gather and emit post-function exception information.
+  void endFunction(const MachineFunction *) override;
+
+  /// Emit target-specific EH funclet machinery.
+  void beginFunclet(const MachineBasicBlock &MBB, MCSymbol *Sym) override;
+  void endFunclet() override;
+};
+}
+
+#endif
+