1 files changed, 94 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfException.h b/llvm/lib/CodeGen/AsmPrinter/DwarfException.h
new file mode 100644
index 000000000000..24bbf58b91ec
--- /dev/null
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfException.h
@@ -0,0 +1,94 @@
+//===-- DwarfException.h - Dwarf Exception Framework -----------*- 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 dwarf exception info into asm files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
+#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H
+
+#include "EHStreamer.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/MC/MCDwarf.h"
+
+namespace llvm {
+class MachineFunction;
+class ARMTargetStreamer;
+
+class LLVM_LIBRARY_VISIBILITY DwarfCFIExceptionBase : public EHStreamer {
+protected:
+  DwarfCFIExceptionBase(AsmPrinter *A);
+
+  /// Per-function flag to indicate if frame CFI info should be emitted.
+  bool shouldEmitCFI;
+  /// Per-module flag to indicate if .cfi_section has beeen emitted.
+  bool hasEmittedCFISections;
+
+  void markFunctionEnd() override;
+  void endFragment() override;
+};
+
+class LLVM_LIBRARY_VISIBILITY DwarfCFIException : public DwarfCFIExceptionBase {
+  /// Per-function flag to indicate if .cfi_personality should be emitted.
+  bool shouldEmitPersonality;
+
+  /// Per-function flag to indicate if .cfi_personality must be emitted.
+  bool forceEmitPersonality;
+
+  /// Per-function flag to indicate if .cfi_lsda should be emitted.
+  bool shouldEmitLSDA;
+
+  /// Per-function flag to indicate if frame moves info should be emitted.
+  bool shouldEmitMoves;
+
+public:
+  //===--------------------------------------------------------------------===//
+  // Main entry points.
+  //
+  DwarfCFIException(AsmPrinter *A);
+  ~DwarfCFIException() 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;
+
+  /// Gather and emit post-function exception information.
+  void endFunction(const MachineFunction *) override;
+
+  void beginFragment(const MachineBasicBlock *MBB,
+                     ExceptionSymbolProvider ESP) override;
+};
+
+class LLVM_LIBRARY_VISIBILITY ARMException : public DwarfCFIExceptionBase {
+  void emitTypeInfos(unsigned TTypeEncoding, MCSymbol *TTBaseLabel) override;
+  ARMTargetStreamer &getTargetStreamer();
+
+public:
+  //===--------------------------------------------------------------------===//
+  // Main entry points.
+  //
+  ARMException(AsmPrinter *A);
+  ~ARMException() 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;
+
+  /// Gather and emit post-function exception information.
+  void endFunction(const MachineFunction *) override;
+};
+} // End of namespace llvm
+
+#endif