Initial support for the cfi directives. This is just enough to get

f:
        .cfi_startproc
        nop
        .cfi_endproc

assembled (on ELF).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121434 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetAsmInfo.h

@@ -0,0 +1,75 @@
+//===-- llvm/Target/TargetAsmInfo.h -----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Interface to provide the information necessary for producing assembly files.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_TARGETASMINFO_H
+#define LLVM_TARGET_TARGETASMINFO_H
+
+#include "llvm/CodeGen/MachineLocation.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+
+namespace llvm {
+  class MCSection;
+  class MCContext;
+  class TargetMachine;
+  class TargetLoweringObjectFile;
+
+class TargetAsmInfo {
+  unsigned PointerSize;
+  bool IsLittleEndian;
+  TargetFrameInfo::StackDirection StackDir;
+  const TargetRegisterInfo *TRI;
+  std::vector<MachineMove> InitialFrameState;
+  const TargetLoweringObjectFile *TLOF;
+
+public:
+  explicit TargetAsmInfo(const TargetMachine &TM);
+
+  /// getPointerSize - Get the pointer size in bytes.
+  unsigned getPointerSize() const {
+    return PointerSize;
+  }
+
+  /// islittleendian - True if the target is little endian.
+  bool isLittleEndian() const {
+    return IsLittleEndian;
+  }
+
+  TargetFrameInfo::StackDirection getStackGrowthDirection() const {
+    return StackDir;
+  }
+
+  const MCSection *getDwarfLineSection() const {
+    return TLOF->getDwarfLineSection();
+  }
+
+  const MCSection *getEHFrameSection() const {
+    return TLOF->getEHFrameSection();
+  }
+
+  unsigned getDwarfRARegNum(bool isEH) const {
+    return TRI->getDwarfRegNum(TRI->getRARegister(), isEH);
+  }
+
+  const std::vector<MachineMove> &getInitialFrameState() const {
+    return InitialFrameState;
+  }
+
+  int getDwarfRegNum(unsigned RegNum, bool isEH) const {
+    return TRI->getDwarfRegNum(RegNum, isEH);
+  }
+};
+
+}
+#endif