Fix undefined behavior in the Mips backend.

[oota-llvm.git] / lib / Target / X86 / X86MachineFunctionInfo.h

diff --git a/lib/Target/X86/X86MachineFunctionInfo.h b/lib/Target/X86/X86MachineFunctionInfo.h
index b5c9cafeca822fd46d2f17af050ae29fee38a714..c7471091ec47014edea196f8922e7c1511446021 100644 (file)
--- a/lib/Target/X86/X86MachineFunctionInfo.h
+++ b/lib/Target/X86/X86MachineFunctionInfo.h
@@ -1,10 +1,10 @@
-//====- X86MachineFuctionInfo.h - X86 machine function info -----*- C++ -*-===//
-// 
+//===-- X86MachineFuctionInfo.h - X86 machine function info -----*- C++ -*-===//
+//
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
-// 
+//
 //===----------------------------------------------------------------------===//
 //
 // This file declares X86-specific per-machine-function information.
@@ -18,15 +18,11 @@
 
 namespace llvm {
 
-enum NameDecorationStyle {
-  None,
-  StdCall,
-  FastCall
-};
-  
-/// X86MachineFunctionInfo - This class is derived from MachineFunction private
-/// X86 target-specific information for each MachineFunction.
+/// X86MachineFunctionInfo - This class is derived from MachineFunction and
+/// contains private X86 target-specific information for each MachineFunction.
 class X86MachineFunctionInfo : public MachineFunctionInfo {
+  virtual void anchor();
+
   /// ForceFramePointer - True if the function is required to use of frame
   /// pointer for reasons other than it containing dynamic allocation or 
   /// that FP eliminatation is turned off. For example, Cygwin main function
@@ -37,20 +33,16 @@ class X86MachineFunctionInfo : public MachineFunctionInfo {
   /// stack frame in bytes.
   unsigned CalleeSavedFrameSize;
 
-  /// BytesToPopOnReturn - Number of bytes function pops on return.
+  /// BytesToPopOnReturn - Number of bytes function pops on return (in addition
+  /// to the space used by the return address).
   /// Used on windows platform for stdcall & fastcall name decoration
   unsigned BytesToPopOnReturn;
 
-  /// DecorationStyle - If the function requires additional name decoration,
-  /// DecorationStyle holds the right way to do so.
-  NameDecorationStyle DecorationStyle;
-
   /// ReturnAddrIndex - FrameIndex for return slot.
   int ReturnAddrIndex;
 
-  /// TailCallReturnAddrDelta - Delta the ReturnAddr stack slot is moved
-  /// Used for creating an area before the register spill area on the stack
-  /// the returnaddr can be savely move to this area
+  /// TailCallReturnAddrDelta - The number of bytes by which return address
+  /// stack slot is moved as the result of tail call optimization.
   int TailCallReturnAddrDelta;
 
   /// SRetReturnReg - Some subtargets require that sret lowering includes
@@ -58,22 +50,50 @@ class X86MachineFunctionInfo : public MachineFunctionInfo {
   /// holds the virtual register into which the sret argument is passed.
   unsigned SRetReturnReg;
 
+  /// GlobalBaseReg - keeps track of the virtual register initialized for
+  /// use as the global base register. This is used for PIC in some PIC
+  /// relocation models.
+  unsigned GlobalBaseReg;
+
+  /// VarArgsFrameIndex - FrameIndex for start of varargs area.
+  int VarArgsFrameIndex;
+  /// RegSaveFrameIndex - X86-64 vararg func register save area.
+  int RegSaveFrameIndex;
+  /// VarArgsGPOffset - X86-64 vararg func int reg offset.
+  unsigned VarArgsGPOffset;
+  /// VarArgsFPOffset - X86-64 vararg func fp reg offset.
+  unsigned VarArgsFPOffset;
+  /// ArgumentStackSize - The number of bytes on stack consumed by the arguments
+  /// being passed on the stack.
+  unsigned ArgumentStackSize;
+
 public:
   X86MachineFunctionInfo() : ForceFramePointer(false),
                              CalleeSavedFrameSize(0),
                              BytesToPopOnReturn(0),
-                             DecorationStyle(None),
                              ReturnAddrIndex(0),
                              TailCallReturnAddrDelta(0),
-                             SRetReturnReg(0) {}
+                             SRetReturnReg(0),
+                             GlobalBaseReg(0),
+                             VarArgsFrameIndex(0),
+                             RegSaveFrameIndex(0),
+                             VarArgsGPOffset(0),
+                             VarArgsFPOffset(0),
+                             ArgumentStackSize(0) {}
   
-  X86MachineFunctionInfo(MachineFunction &MF) : ForceFramePointer(false),
-                                                CalleeSavedFrameSize(0),
-                                                BytesToPopOnReturn(0),
-                                                DecorationStyle(None),
-                                                ReturnAddrIndex(0),
-                                                TailCallReturnAddrDelta(0),
-                                                SRetReturnReg(0) {}
+  explicit X86MachineFunctionInfo(MachineFunction &MF)
+    : ForceFramePointer(false),
+      CalleeSavedFrameSize(0),
+      BytesToPopOnReturn(0),
+      ReturnAddrIndex(0),
+      TailCallReturnAddrDelta(0),
+      SRetReturnReg(0),
+      GlobalBaseReg(0),
+      VarArgsFrameIndex(0),
+      RegSaveFrameIndex(0),
+      VarArgsGPOffset(0),
+      VarArgsFPOffset(0),
+      ArgumentStackSize(0) {}
   
   bool getForceFramePointer() const { return ForceFramePointer;} 
   void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
@@ -84,9 +104,6 @@ public:
   unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
   void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
 
-  NameDecorationStyle getDecorationStyle() const { return DecorationStyle; }
-  void setDecorationStyle(NameDecorationStyle style) { DecorationStyle = style;}
-
   int getRAIndex() const { return ReturnAddrIndex; }
   void setRAIndex(int Index) { ReturnAddrIndex = Index; }
 
@@ -95,7 +112,26 @@ public:
 
   unsigned getSRetReturnReg() const { return SRetReturnReg; }
   void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
+
+  unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
+  void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
+
+  int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
+  void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
+
+  int getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
+  void setRegSaveFrameIndex(int Idx) { RegSaveFrameIndex = Idx; }
+
+  unsigned getVarArgsGPOffset() const { return VarArgsGPOffset; }
+  void setVarArgsGPOffset(unsigned Offset) { VarArgsGPOffset = Offset; }
+
+  unsigned getVarArgsFPOffset() const { return VarArgsFPOffset; }
+  void setVarArgsFPOffset(unsigned Offset) { VarArgsFPOffset = Offset; }
+
+  unsigned getArgumentStackSize() const { return ArgumentStackSize; }
+  void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
 };
+
 } // End llvm namespace
 
 #endif