Adding function "lookupGCCName" to MBlazeIntrinsicInfo

Adding the function "lookupGCCName" to the MBlazeIntrinsicInfo
class to support the Clang MicroBlaze target.

Additionally, minor fixes which remove some unused PIC code 
(PIC is not supported yet in the MicroBlaze backend) and
removed some unused variables.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97054 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/MBlaze/MBlazeISelLowering.cpp

@@ -470,7 +470,6 @@ LowerCall(SDValue Chain, SDValue Callee, CallingConv::ID CallConv,
           SmallVectorImpl<SDValue> &InVals) {
   MachineFunction &MF = DAG.getMachineFunction();
   MachineFrameInfo *MFI = MF.getFrameInfo();
-  bool IsPIC = getTargetMachine().getRelocationModel() == Reloc::PIC_;
 
   // Analyze operands of the call, assigning locations to each operand.
   SmallVector<CCValAssign, 16> ArgLocs;
@@ -556,7 +555,7 @@ LowerCall(SDValue Chain, SDValue Callee, CallingConv::ID CallConv,
   // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
   // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
   // node so that legalize doesn't hack it.
-  unsigned char OpFlag = IsPIC ? MBlazeII::MO_GOT_CALL : MBlazeII::MO_NO_FLAG;
+  unsigned char OpFlag = MBlazeII::MO_NO_FLAG;
   if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee))
     Callee = DAG.getTargetGlobalAddress(G->getGlobal(),
                                 getPointerTy(), 0, OpFlag);

lib/Target/MBlaze/MBlazeIntrinsicInfo.cpp

@@ -32,6 +32,9 @@ namespace mblazeIntrinsic {
     , num_mblaze_intrinsics
   };
 
+#define GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
+#include "MBlazeGenIntrinsics.inc"
+#undef GET_LLVM_INTRINSIC_FOR_GCC_BUILTIN
 }
 
 std::string MBlazeIntrinsicInfo::getName(unsigned IntrID, const Type **Tys,
@@ -60,6 +63,11 @@ lookupName(const char *Name, unsigned Len) const {
   return 0;
 }
 
+unsigned MBlazeIntrinsicInfo::
+lookupGCCName(const char *Name) const {
+    return mblazeIntrinsic::getIntrinsicForGCCBuiltin("mblaze",Name);
+}
+
 bool MBlazeIntrinsicInfo::isOverloaded(unsigned IntrID) const {
   // Overload Table
   const bool OTable[] = {

lib/Target/MBlaze/MBlazeIntrinsicInfo.h

@@ -22,6 +22,7 @@ namespace llvm {
     std::string getName(unsigned IntrID, const Type **Tys = 0,
                         unsigned numTys = 0) const;
     unsigned lookupName(const char *Name, unsigned Len) const;
+    unsigned lookupGCCName(const char *Name) const;
     bool isOverloaded(unsigned IID) const;
     Function *getDeclaration(Module *M, unsigned ID, const Type **Tys = 0,
                              unsigned numTys = 0) const;

lib/Target/MBlaze/MBlazeMachineFunction.h

@@ -34,12 +34,11 @@ private:
   /// saved. This is used on Prologue and Epilogue to emit RA save/restore
   int RAStackOffset;
 
-  /// At each function entry, two special bitmask directives must be emitted
-  /// to help debugging, for CPU and FPU callee saved registers. Both need
-  /// the negative offset from the final stack size and its higher registers
-  /// location on the stack.
+  /// At each function entry a special bitmask directive must be emitted
+  /// to help in debugging CPU callee saved registers. It needs a negative
+  /// offset from the final stack size and its higher register location on
+  /// the stack.
   int CPUTopSavedRegOff;
-  int FPUTopSavedRegOff;
 
   /// MBlazeFIHolder - Holds a FrameIndex and it's Stack Pointer Offset
   struct MBlazeFIHolder {
@@ -83,8 +82,8 @@ private:
 public:
   MBlazeFunctionInfo(MachineFunction& MF) 
   : FPStackOffset(0), RAStackOffset(0), CPUTopSavedRegOff(0), 
-    FPUTopSavedRegOff(0), GPHolder(-1,-1), HasLoadArgs(false), 
-    HasStoreVarArgs(false), SRetReturnReg(0), GlobalBaseReg(0)
+    GPHolder(-1,-1), HasLoadArgs(false), HasStoreVarArgs(false),
+    SRetReturnReg(0), GlobalBaseReg(0)
   {}
 
   int getFPStackOffset() const { return FPStackOffset; }
@@ -96,9 +95,6 @@ public:
   int getCPUTopSavedRegOff() const { return CPUTopSavedRegOff; }
   void setCPUTopSavedRegOff(int Off) { CPUTopSavedRegOff = Off; }
 
-  int getFPUTopSavedRegOff() const { return FPUTopSavedRegOff; }
-  void setFPUTopSavedRegOff(int Off) { FPUTopSavedRegOff = Off; }
-
   int getGPStackOffset() const { return GPHolder.SPOffset; }
   int getGPFI() const { return GPHolder.FI; }
   void setGPStackOffset(int Off) { GPHolder.SPOffset = Off; }

lib/Target/MBlaze/MBlazeRegisterInfo.cpp

@@ -96,7 +96,7 @@ unsigned MBlazeRegisterInfo::getPICCallReg() {
 /// MBlaze Callee Saved Registers
 const unsigned* MBlazeRegisterInfo::
 getCalleeSavedRegs(const MachineFunction *MF) const {
-  // MBlaze callee-save register range is R19 - R31
+  // MBlaze callee-save register range is R20 - R31
   static const unsigned CalleeSavedRegs[] = {
     MBlaze::R20, MBlaze::R21, MBlaze::R22, MBlaze::R23,
     MBlaze::R24, MBlaze::R25, MBlaze::R26, MBlaze::R27,