[mips] Removed MipsCC::fixedArgFn(). NFC

Summary:
There is one remaining trace of it in MipsCC::analyzeCallOperands() where
Mips16 might override the calling convention. This will moved into
tablegen-erated code later.

Depends on D5965

Reviewers: vmedic

Reviewed By: vmedic

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D5966

llvm-svn: 221053
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.h b/llvm/lib/Target/Mips/MipsISelLowering.h
index d9e490d..a35946d 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.h
+++ b/llvm/lib/Target/Mips/MipsISelLowering.h
@@ -357,8 +357,7 @@
       };
 
       MipsCC(CallingConv::ID CallConv, const MipsSubtarget &Subtarget,
-             CCState &Info,
-             SpecialCallingConvType SpecialCallingConv = NoSpecialCallingConv);
+             CCState &Info);
 
       void analyzeCallOperands(const SmallVectorImpl<ISD::OutputArg> &Outs,
                                bool IsVarArg, bool IsSoftFloat,
@@ -393,9 +392,6 @@
       /// use of registers to pass byval arguments.
       bool useRegsForByval() const { return CallConv != CallingConv::Fast; }
 
-      /// Return the function that analyzes fixed argument list functions.
-      llvm::CCAssignFn *fixedArgFn() const;
-
       const MCPhysReg *shadowRegs() const;
 
       void allocateRegs(ByValArgInfo &ByVal, unsigned ByValSize,
@@ -412,10 +408,11 @@
       void analyzeReturn(const SmallVectorImpl<Ty> &RetVals, bool IsSoftFloat,
                          const SDNode *CallNode, const Type *RetTy) const;
 
+      SpecialCallingConvType getSpecialCallingConv(const SDNode *Callee) const;
+
       CCState &CCInfo;
       CallingConv::ID CallConv;
       const MipsSubtarget &Subtarget;
-      SpecialCallingConvType SpecialCallingConv;
       SmallVector<ByValArgInfo, 2> ByValArgs;
     };
   protected:
@@ -446,8 +443,6 @@
     SDValue getTargetNode(ConstantPoolSDNode *N, EVT Ty, SelectionDAG &DAG,
                           unsigned Flag) const;
 
-    MipsCC::SpecialCallingConvType getSpecialCallingConv(SDValue Callee) const;
-
     // Lower Operand helpers
     SDValue LowerCallResult(SDValue Chain, SDValue InFlag,
                             CallingConv::ID CallConv, bool isVarArg,