Remove shift amount flavor. It isn't actually complete enough to

be useful, and it's currently unused.  (Some issues: it isn't actually 
rich enough to capture the semantics on many architectures, and
semantics can vary depending on the type being shifted.)

llvm-svn: 76633

llvm/include/llvm/Target/TargetLowering.h

@@ -87,12 +87,6 @@ public:
     Custom      // Use the LowerOperation hook to implement custom lowering.
   };
 
-  enum OutOfRangeShiftAmount {
-    Undefined,  // Oversized shift amounts are undefined (default).
-    Mask,       // Shift amounts are auto masked (anded) to value size.
-    Extend      // Oversized shift pulls in zeros or sign bits.
-  };
-
   enum BooleanContent { // How the target represents true/false values.
     UndefinedBooleanContent,    // Only bit 0 counts, the rest can hold garbage.
     ZeroOrOneBooleanContent,        // All bits zero except for bit 0.
@@ -114,7 +108,6 @@ public:
   bool isLittleEndian() const { return IsLittleEndian; }
   MVT getPointerTy() const { return PointerTy; }
   MVT getShiftAmountTy() const { return ShiftAmountTy; }
-  OutOfRangeShiftAmount getShiftAmountFlavor() const {return ShiftAmtHandling; }
 
   /// usesGlobalOffsetTable - Return true if this target uses a GOT for PIC
   /// codegen.
@@ -878,12 +871,6 @@ protected:
     SchedPreferenceInfo = Pref;
   }
 
-  /// setShiftAmountFlavor - Describe how the target handles out of range shift
-  /// amounts.
-  void setShiftAmountFlavor(OutOfRangeShiftAmount OORSA) {
-    ShiftAmtHandling = OORSA;
-  }
-
   /// setUseUnderscoreSetJmp - Indicate whether this target prefers to
   /// use _setjmp to implement llvm.setjmp or the non _ version.
   /// Defaults to false.
@@ -1525,8 +1512,6 @@ private:
   /// PointerTy is.
   MVT ShiftAmountTy;
 
-  OutOfRangeShiftAmount ShiftAmtHandling;
-
   /// BooleanContents - Information about the contents of the high-bits in
   /// boolean values held in a type wider than i1.  See getBooleanContents.
   BooleanContent BooleanContents;

llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp

@@ -492,7 +492,6 @@ TargetLowering::TargetLowering(TargetMachine &tm)
   IsLittleEndian = TD->isLittleEndian();
   UsesGlobalOffsetTable = false;
   ShiftAmountTy = PointerTy = getValueType(TD->getIntPtrType());
-  ShiftAmtHandling = Undefined;
   memset(RegClassForVT, 0,MVT::LAST_VALUETYPE*sizeof(TargetRegisterClass*));
   memset(TargetDAGCombineArray, 0, array_lengthof(TargetDAGCombineArray));
   maxStoresPerMemset = maxStoresPerMemcpy = maxStoresPerMemmove = 8;

llvm/lib/Target/PIC16/PIC16ISelLowering.cpp

@@ -130,7 +130,6 @@ PIC16TargetLowering::PIC16TargetLowering(PIC16TargetMachine &TM)
   addRegisterClass(MVT::i8, PIC16::GPRRegisterClass);
 
   setShiftAmountType(MVT::i8);
-  setShiftAmountFlavor(Extend);
 
   // SRA library call names
   setPIC16LibcallName(PIC16ISD::SRA_I8, getIntrinsicName(PIC16ISD::SRA_I8));

llvm/lib/Target/X86/X86ISelLowering.cpp

@@ -66,7 +66,6 @@ X86TargetLowering::X86TargetLowering(X86TargetMachine &TM)
   setShiftAmountType(MVT::i8);
   setBooleanContents(ZeroOrOneBooleanContent);
   setSchedulingPreference(SchedulingForRegPressure);
-  setShiftAmountFlavor(Mask);   // shl X, 32 == shl X, 0
   setStackPointerRegisterToSaveRestore(X86StackPtr);
 
   if (Subtarget->isTargetDarwin()) {

llvm/lib/Target/XCore/XCoreISelLowering.cpp

@@ -68,8 +68,6 @@ XCoreTargetLowering::XCoreTargetLowering(XCoreTargetMachine &XTM)
   setIntDivIsCheap(false);
 
   setShiftAmountType(MVT::i32);
-  // shl X, 32 == 0
-  setShiftAmountFlavor(Extend);
   setStackPointerRegisterToSaveRestore(XCore::SP);
 
   setSchedulingPreference(SchedulingForRegPressure);