[NFC] Remove/replace some confusing attribute getters on Function

llvm/include/llvm/IR/Function.h

@@ -440,11 +440,6 @@ public:
   /// `undef` or `poison` value is passed from the list of attributes.
   void removeParamUndefImplyingAttrs(unsigned ArgNo);
 
-  /// check if an attributes is in the list of attributes.
-  bool hasAttribute(unsigned i, Attribute::AttrKind Kind) const {
-    return getAttributes().hasAttribute(i, Kind);
-  }
-
   /// check if an attributes is in the list of attributes.
   bool hasParamAttribute(unsigned ArgNo, Attribute::AttrKind Kind) const {
     return getAttributes().hasParamAttr(ArgNo, Kind);
@@ -470,17 +465,10 @@ public:
     return AttributeSets.getAttribute(i, Kind);
   }
 
-  /// adds the dereferenceable attribute to the list of attributes.
-  void addDereferenceableAttr(unsigned i, uint64_t Bytes);
-
   /// adds the dereferenceable attribute to the list of attributes for
   /// the given arg.
   void addDereferenceableParamAttr(unsigned ArgNo, uint64_t Bytes);
 
-  /// adds the dereferenceable_or_null attribute to the list of
-  /// attributes.
-  void addDereferenceableOrNullAttr(unsigned i, uint64_t Bytes);
-
   /// adds the dereferenceable_or_null attribute to the list of
   /// attributes for the given arg.
   void addDereferenceableOrNullParamAttr(unsigned ArgNo, uint64_t Bytes);

llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp

@@ -2668,7 +2668,7 @@ void SelectionDAGBuilder::visitSPDescriptorParent(StackProtectorDescriptor &SPD,
     TargetLowering::ArgListEntry Entry;
     Entry.Node = GuardVal;
     Entry.Ty = FnTy->getParamType(0);
-    if (GuardCheckFn->hasAttribute(1, Attribute::AttrKind::InReg))
+    if (GuardCheckFn->hasParamAttribute(0, Attribute::AttrKind::InReg))
       Entry.IsInReg = true;
     Args.push_back(Entry);
 

llvm/lib/IR/Function.cpp

@@ -601,24 +601,12 @@ void Function::removeParamAttrs(unsigned ArgNo, const AttrBuilder &Attrs) {
   setAttributes(PAL);
 }
 
-void Function::addDereferenceableAttr(unsigned i, uint64_t Bytes) {
-  AttributeList PAL = getAttributes();
-  PAL = PAL.addDereferenceableAttr(getContext(), i, Bytes);
-  setAttributes(PAL);
-}
-
 void Function::addDereferenceableParamAttr(unsigned ArgNo, uint64_t Bytes) {
   AttributeList PAL = getAttributes();
   PAL = PAL.addDereferenceableParamAttr(getContext(), ArgNo, Bytes);
   setAttributes(PAL);
 }
 
-void Function::addDereferenceableOrNullAttr(unsigned i, uint64_t Bytes) {
-  AttributeList PAL = getAttributes();
-  PAL = PAL.addDereferenceableOrNullAttr(getContext(), i, Bytes);
-  setAttributes(PAL);
-}
-
 void Function::addDereferenceableOrNullParamAttr(unsigned ArgNo,
                                                  uint64_t Bytes) {
   AttributeList PAL = getAttributes();

llvm/lib/Transforms/Utils/BuildLibCalls.cpp

@@ -96,7 +96,7 @@ static bool setDoesNotThrow(Function &F) {
 }
 
 static bool setRetDoesNotAlias(Function &F) {
-  if (F.hasAttribute(AttributeList::ReturnIndex, Attribute::NoAlias))
+  if (F.hasRetAttribute(Attribute::NoAlias))
     return false;
   F.addAttribute(AttributeList::ReturnIndex, Attribute::NoAlias);
   ++NumNoAlias;
@@ -145,7 +145,7 @@ static bool setSignExtendedArg(Function &F, unsigned ArgNo) {
 
 static bool setRetNoUndef(Function &F) {
   if (!F.getReturnType()->isVoidTy() &&
-      !F.hasAttribute(AttributeList::ReturnIndex, Attribute::NoUndef)) {
+      !F.hasRetAttribute(Attribute::NoUndef)) {
     F.addAttribute(AttributeList::ReturnIndex, Attribute::NoUndef);
     ++NumNoUndef;
     return true;