Add an enum for the return and function indexes into the AttrListPtr object. This gets rid of some magic numbers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165924 91177308-0d34-0410-b5e6-96231b3b80d8

10 files changed, 109 insertions, 69 deletions

diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 7dc945d7e6..6f67e48f21 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -2771,9 +2771,10 @@ bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) {
   SmallVector<AttributeWithIndex, 8> Attrs;
 
   if (RetAttrs.hasAttributes())
-    Attrs.push_back(AttributeWithIndex::get(0,
-                                          Attributes::get(RetType->getContext(),
-                                                          RetAttrs)));
+    Attrs.push_back(
+      AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                              Attributes::get(RetType->getContext(),
+                                              RetAttrs)));
 
   for (unsigned i = 0, e = ArgList.size(); i != e; ++i) {
     ParamTypeList.push_back(ArgList[i].Ty);
@@ -2782,9 +2783,10 @@ bool LLParser::ParseFunctionHeader(Function *&Fn, bool isDefine) {
   }
 
   if (FuncAttrs.hasAttributes())
-    Attrs.push_back(AttributeWithIndex::get(~0,
-                                          Attributes::get(RetType->getContext(),
-                                                          FuncAttrs)));
+    Attrs.push_back(
+      AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                              Attributes::get(RetType->getContext(),
+                                              FuncAttrs)));
 
   AttrListPtr PAL = AttrListPtr::get(Attrs);
 
@@ -3306,9 +3308,10 @@ bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) {
   // Set up the Attributes for the function.
   SmallVector<AttributeWithIndex, 8> Attrs;
   if (RetAttrs.hasAttributes())
-    Attrs.push_back(AttributeWithIndex::get(0,
-                                           Attributes::get(Callee->getContext(),
-                                                           RetAttrs)));
+    Attrs.push_back(
+      AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                              Attributes::get(Callee->getContext(),
+                                              RetAttrs)));
 
   SmallVector<Value*, 8> Args;
 
@@ -3336,9 +3339,10 @@ bool LLParser::ParseInvoke(Instruction *&Inst, PerFunctionState &PFS) {
     return Error(CallLoc, "not enough parameters specified for call");
 
   if (FnAttrs.hasAttributes())
-    Attrs.push_back(AttributeWithIndex::get(~0,
-                                           Attributes::get(Callee->getContext(),
-                                                           FnAttrs)));
+    Attrs.push_back(
+      AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                              Attributes::get(Callee->getContext(),
+                                              FnAttrs)));
 
   // Finish off the Attributes and check them
   AttrListPtr PAL = AttrListPtr::get(Attrs);
@@ -3706,9 +3710,10 @@ bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS,
   // Set up the Attributes for the function.
   SmallVector<AttributeWithIndex, 8> Attrs;
   if (RetAttrs.hasAttributes())
-    Attrs.push_back(AttributeWithIndex::get(0,
-                                           Attributes::get(Callee->getContext(),
-                                                           RetAttrs)));
+    Attrs.push_back(
+      AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                              Attributes::get(Callee->getContext(),
+                                              RetAttrs)));
 
   SmallVector<Value*, 8> Args;
 
@@ -3736,9 +3741,10 @@ bool LLParser::ParseCall(Instruction *&Inst, PerFunctionState &PFS,
     return Error(CallLoc, "not enough parameters specified for call");
 
   if (FnAttrs.hasAttributes())
-    Attrs.push_back(AttributeWithIndex::get(~0,
-                                           Attributes::get(Callee->getContext(),
-                                                           FnAttrs)));
+    Attrs.push_back(
+      AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                              Attributes::get(Callee->getContext(),
+                                              FnAttrs)));
 
   // Finish off the Attributes and check them
   AttrListPtr PAL = AttrListPtr::get(Attrs);
diff --git a/lib/Transforms/IPO/ArgumentPromotion.cpp b/lib/Transforms/IPO/ArgumentPromotion.cpp
index 948d1d74ad..8a0274b5ff 100644
--- a/lib/Transforms/IPO/ArgumentPromotion.cpp
+++ b/lib/Transforms/IPO/ArgumentPromotion.cpp
@@ -520,7 +520,8 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
   // Add any return attributes.
   Attributes attrs = PAL.getRetAttributes();
   if (attrs.hasAttributes())
-    AttributesVec.push_back(AttributeWithIndex::get(0, attrs));
+    AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                                                    attrs));
 
   // First, determine the new argument list
   unsigned ArgIndex = 1;
@@ -592,7 +593,8 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
   // Add any function attributes.
   attrs = PAL.getFnAttributes();
   if (attrs.hasAttributes())
-    AttributesVec.push_back(AttributeWithIndex::get(~0, attrs));
+    AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                                    attrs));
 
   Type *RetTy = FTy->getReturnType();
 
@@ -639,7 +641,8 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
     // Add any return attributes.
     Attributes attrs = CallPAL.getRetAttributes();
     if (attrs.hasAttributes())
-      AttributesVec.push_back(AttributeWithIndex::get(0, attrs));
+      AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                                                      attrs));
 
     // Loop over the operands, inserting GEP and loads in the caller as
     // appropriate.
@@ -720,7 +723,8 @@ CallGraphNode *ArgPromotion::DoPromotion(Function *F,
     // Add any function attributes.
     attrs = CallPAL.getFnAttributes();
     if (attrs.hasAttributes())
-      AttributesVec.push_back(AttributeWithIndex::get(~0, attrs));
+      AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                                      attrs));
 
     Instruction *New;
     if (InvokeInst *II = dyn_cast<InvokeInst>(Call)) {
diff --git a/lib/Transforms/IPO/DeadArgumentElimination.cpp b/lib/Transforms/IPO/DeadArgumentElimination.cpp
index 8420d3a129..a7ff182dac 100644
--- a/lib/Transforms/IPO/DeadArgumentElimination.cpp
+++ b/lib/Transforms/IPO/DeadArgumentElimination.cpp
@@ -278,7 +278,8 @@ bool DAE::DeleteDeadVarargs(Function &Fn) {
         AttributesVec.push_back(PAL.getSlot(i));
       Attributes FnAttrs = PAL.getFnAttributes();
       if (FnAttrs.hasAttributes())
-        AttributesVec.push_back(AttributeWithIndex::get(~0, FnAttrs));
+        AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                                        FnAttrs));
       PAL = AttrListPtr::get(AttributesVec);
     }
 
@@ -772,7 +773,8 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
            "Return attributes no longer compatible?");
 
   if (RAttrs.hasAttributes())
-    AttributesVec.push_back(AttributeWithIndex::get(0, RAttrs));
+    AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                                                    RAttrs));
 
   // Remember which arguments are still alive.
   SmallVector<bool, 10> ArgAlive(FTy->getNumParams(), false);
@@ -800,7 +802,8 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
   }
 
   if (FnAttrs.hasAttributes())
-    AttributesVec.push_back(AttributeWithIndex::get(~0, FnAttrs));
+    AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                                    FnAttrs));
 
   // Reconstruct the AttributesList based on the vector we constructed.
   AttrListPtr NewPAL = AttrListPtr::get(AttributesVec);
@@ -840,7 +843,8 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
       Attributes::get(NF->getContext(), Attributes::Builder(RAttrs).
            removeAttributes(Attributes::typeIncompatible(NF->getReturnType())));
     if (RAttrs.hasAttributes())
-      AttributesVec.push_back(AttributeWithIndex::get(0, RAttrs));
+      AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                                                      RAttrs));
 
     // Declare these outside of the loops, so we can reuse them for the second
     // loop, which loops the varargs.
@@ -866,7 +870,8 @@ bool DAE::RemoveDeadStuffFromFunction(Function *F) {
     }
 
     if (FnAttrs.hasAttributes())
-      AttributesVec.push_back(AttributeWithIndex::get(~0, FnAttrs));
+      AttributesVec.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                                      FnAttrs));
 
     // Reconstruct the AttributesList based on the vector we constructed.
     AttrListPtr NewCallPAL = AttrListPtr::get(AttributesVec);
diff --git a/lib/Transforms/IPO/FunctionAttrs.cpp b/lib/Transforms/IPO/FunctionAttrs.cpp
index ba247707f3..9fe42f074a 100644
--- a/lib/Transforms/IPO/FunctionAttrs.cpp
+++ b/lib/Transforms/IPO/FunctionAttrs.cpp
@@ -215,12 +215,14 @@ bool FunctionAttrs::AddReadAttrs(const CallGraphSCC &SCC) {
     Attributes::Builder B;
     B.addAttribute(Attributes::ReadOnly)
       .addAttribute(Attributes::ReadNone);
-    F->removeAttribute(~0, Attributes::get(F->getContext(), B));
+    F->removeAttribute(AttrListPtr::FunctionIndex,
+                       Attributes::get(F->getContext(), B));
 
     // Add in the new attribute.
     B.clear();
     B.addAttribute(ReadsMemory ? Attributes::ReadOnly : Attributes::ReadNone);
-    F->addAttribute(~0, Attributes::get(F->getContext(), B));
+    F->addAttribute(AttrListPtr::FunctionIndex,
+                    Attributes::get(F->getContext(), B));
 
     if (ReadsMemory)
       ++NumReadOnly;
diff --git a/lib/Transforms/InstCombine/InstCombineCalls.cpp b/lib/Transforms/InstCombine/InstCombineCalls.cpp
index 6d7e6a6f0b..44ddf3be34 100644
--- a/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -1118,7 +1118,8 @@ bool InstCombiner::transformConstExprCastCall(CallSite CS) {
   // Add the new return attributes.
   if (RAttrs.hasAttributes())
     attrVec.push_back(
-      AttributeWithIndex::get(0, Attributes::get(FT->getContext(), RAttrs)));
+      AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                              Attributes::get(FT->getContext(), RAttrs)));
 
   AI = CS.arg_begin();
   for (unsigned i = 0; i != NumCommonArgs; ++i, ++AI) {
@@ -1170,7 +1171,8 @@ bool InstCombiner::transformConstExprCastCall(CallSite CS) {
 
   Attributes FnAttrs = CallerPAL.getFnAttributes();
   if (FnAttrs.hasAttributes())
-    attrVec.push_back(AttributeWithIndex::get(~0, FnAttrs));
+    attrVec.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                              FnAttrs));
 
   if (NewRetTy->isVoidTy())
     Caller->setName("");   // Void type should not have a name.
@@ -1280,7 +1282,8 @@ InstCombiner::transformCallThroughTrampoline(CallSite CS,
       // Add any result attributes.
       Attributes Attr = Attrs.getRetAttributes();
       if (Attr.hasAttributes())
-        NewAttrs.push_back(AttributeWithIndex::get(0, Attr));
+        NewAttrs.push_back(AttributeWithIndex::get(AttrListPtr::ReturnIndex,
+                                                   Attr));
 
       {
         unsigned Idx = 1;
@@ -1312,7 +1315,8 @@ InstCombiner::transformCallThroughTrampoline(CallSite CS,
       // Add any function attributes.
       Attr = Attrs.getFnAttributes();
       if (Attr.hasAttributes())
-        NewAttrs.push_back(AttributeWithIndex::get(~0, Attr));
+        NewAttrs.push_back(AttributeWithIndex::get(AttrListPtr::FunctionIndex,
+                                                   Attr));
 
       // The trampoline may have been bitcast to a bogus type (FTy).
       // Handle this by synthesizing a new function type, equal to FTy
diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp
index 663ad86271..017df8f1a4 100644
--- a/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/lib/Transforms/Scalar/ObjCARC.cpp
@@ -1790,8 +1790,9 @@ Constant *ObjCARCOpt::getRetainRVCallee(Module *M) {
     FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                           Attributes::get(M->getContext(), B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(M->getContext(), B));
     RetainRVCallee =
       M->getOrInsertFunction("objc_retainAutoreleasedReturnValue", FTy,
                              Attributes);
@@ -1807,8 +1808,9 @@ Constant *ObjCARCOpt::getAutoreleaseRVCallee(Module *M) {
     FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                                   Attributes::get(C, B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(C, B));
     AutoreleaseRVCallee =
       M->getOrInsertFunction("objc_autoreleaseReturnValue", FTy,
                              Attributes);
@@ -1822,8 +1824,9 @@ Constant *ObjCARCOpt::getReleaseCallee(Module *M) {
     Type *Params[] = { PointerType::getUnqual(Type::getInt8Ty(C)) };
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                                   Attributes::get(C, B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(C, B));
     ReleaseCallee =
       M->getOrInsertFunction(
         "objc_release",
@@ -1839,8 +1842,9 @@ Constant *ObjCARCOpt::getRetainCallee(Module *M) {
     Type *Params[] = { PointerType::getUnqual(Type::getInt8Ty(C)) };
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                                   Attributes::get(C, B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(C, B));
     RetainCallee =
       M->getOrInsertFunction(
         "objc_retain",
@@ -1871,8 +1875,9 @@ Constant *ObjCARCOpt::getAutoreleaseCallee(Module *M) {
     Type *Params[] = { PointerType::getUnqual(Type::getInt8Ty(C)) };
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                                   Attributes::get(C, B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(C, B));
     AutoreleaseCallee =
       M->getOrInsertFunction(
         "objc_autorelease",
@@ -3850,7 +3855,8 @@ Constant *ObjCARCContract::getStoreStrongCallee(Module *M) {
     Attributes::Builder BNoCapture;
     BNoCapture.addAttribute(Attributes::NoCapture);
     AttrListPtr Attributes = AttrListPtr()
-      .addAttr(M->getContext(), ~0u, Attributes::get(C, BNoUnwind))
+      .addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+               Attributes::get(C, BNoUnwind))
       .addAttr(M->getContext(), 1, Attributes::get(C, BNoCapture));
 
     StoreStrongCallee =
@@ -3870,8 +3876,9 @@ Constant *ObjCARCContract::getRetainAutoreleaseCallee(Module *M) {
     FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                                   Attributes::get(C, B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(C, B));
     RetainAutoreleaseCallee =
       M->getOrInsertFunction("objc_retainAutorelease", FTy, Attributes);
   }
@@ -3886,8 +3893,9 @@ Constant *ObjCARCContract::getRetainAutoreleaseRVCallee(Module *M) {
     FunctionType *FTy = FunctionType::get(I8X, Params, /*isVarArg=*/false);
     Attributes::Builder B;
     B.addAttribute(Attributes::NoUnwind);
-    AttrListPtr Attributes = AttrListPtr().addAttr(M->getContext(), ~0u,
-                                                   Attributes::get(C, B));
+    AttrListPtr Attributes =
+      AttrListPtr().addAttr(M->getContext(), AttrListPtr::FunctionIndex,
+                            Attributes::get(C, B));
     RetainAutoreleaseRVCallee =
       M->getOrInsertFunction("objc_retainAutoreleaseReturnValue", FTy,
                              Attributes);
diff --git a/lib/Transforms/Utils/BuildLibCalls.cpp b/lib/Transforms/Utils/BuildLibCalls.cpp
index 7aac79fa12..fa2faa2dad 100644
--- a/lib/Transforms/Utils/BuildLibCalls.cpp
+++ b/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -43,7 +43,7 @@ Value *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout *TD,
   AttributeWithIndex AWI[2];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
   Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
-  AWI[1] = AttributeWithIndex::get(M->getContext(), ~0u,
+  AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
                                    ArrayRef<Attributes::AttrVal>(AVs, 2));
 
   LLVMContext &Context = B.GetInsertBlock()->getContext();
@@ -70,7 +70,7 @@ Value *llvm::EmitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
   AttributeWithIndex AWI[2];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
   Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
-  AWI[1] = AttributeWithIndex::get(M->getContext(), ~0u,
+  AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
                                    ArrayRef<Attributes::AttrVal>(AVs, 2));
 
   LLVMContext &Context = B.GetInsertBlock()->getContext();
@@ -97,7 +97,7 @@ Value *llvm::EmitStrChr(Value *Ptr, char C, IRBuilder<> &B,
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
   AttributeWithIndex AWI =
-    AttributeWithIndex::get(M->getContext(), ~0u,
+    AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
                             ArrayRef<Attributes::AttrVal>(AVs, 2));
 
   Type *I8Ptr = B.getInt8PtrTy();
@@ -123,7 +123,7 @@ Value *llvm::EmitStrNCmp(Value *Ptr1, Value *Ptr2, Value *Len,
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
   AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
   Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
-  AWI[2] = AttributeWithIndex::get(M->getContext(), ~0u,
+  AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
                                    ArrayRef<Attributes::AttrVal>(AVs, 2));
 
   LLVMContext &Context = B.GetInsertBlock()->getContext();
@@ -152,7 +152,8 @@ Value *llvm::EmitStrCpy(Value *Dst, Value *Src, IRBuilder<> &B,
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   AttributeWithIndex AWI[2];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
-  AWI[1] = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                   Attributes::NoUnwind);
   Type *I8Ptr = B.getInt8PtrTy();
   Value *StrCpy = M->getOrInsertFunction(Name, AttrListPtr::get(AWI),
                                          I8Ptr, I8Ptr, I8Ptr, NULL);
@@ -174,7 +175,8 @@ Value *llvm::EmitStrNCpy(Value *Dst, Value *Src, Value *Len,
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   AttributeWithIndex AWI[2];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
-  AWI[1] = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                   Attributes::NoUnwind);
   Type *I8Ptr = B.getInt8PtrTy();
   Value *StrNCpy = M->getOrInsertFunction(Name, AttrListPtr::get(AWI),
                                           I8Ptr, I8Ptr, I8Ptr,
@@ -197,7 +199,8 @@ Value *llvm::EmitMemCpyChk(Value *Dst, Value *Src, Value *Len, Value *ObjSize,
 
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   AttributeWithIndex AWI;
-  AWI = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                Attributes::NoUnwind);
   LLVMContext &Context = B.GetInsertBlock()->getContext();
   Value *MemCpy = M->getOrInsertFunction("__memcpy_chk",
                                          AttrListPtr::get(AWI),
@@ -225,7 +228,7 @@ Value *llvm::EmitMemChr(Value *Ptr, Value *Val,
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   AttributeWithIndex AWI;
   Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
-  AWI = AttributeWithIndex::get(M->getContext(), ~0u,
+  AWI = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
                                 ArrayRef<Attributes::AttrVal>(AVs, 2));
   LLVMContext &Context = B.GetInsertBlock()->getContext();
   Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(AWI),
@@ -254,7 +257,7 @@ Value *llvm::EmitMemCmp(Value *Ptr1, Value *Ptr2,
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
   AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
   Attributes::AttrVal AVs[2] = { Attributes::ReadOnly, Attributes::NoUnwind };
-  AWI[2] = AttributeWithIndex::get(M->getContext(), ~0u,
+  AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
                                    ArrayRef<Attributes::AttrVal>(AVs, 2));
 
   LLVMContext &Context = B.GetInsertBlock()->getContext();
@@ -332,7 +335,8 @@ Value *llvm::EmitPutS(Value *Str, IRBuilder<> &B, const DataLayout *TD,
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   AttributeWithIndex AWI[2];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
-  AWI[1] = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                   Attributes::NoUnwind);
 
   Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI),
                                        B.getInt32Ty(),
@@ -354,7 +358,8 @@ Value *llvm::EmitFPutC(Value *Char, Value *File, IRBuilder<> &B,
   Module *M = B.GetInsertBlock()->getParent()->getParent();
   AttributeWithIndex AWI[2];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
-  AWI[1] = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI[1] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                   Attributes::NoUnwind);
   Constant *F;
   if (File->getType()->isPointerTy())
     F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI),
@@ -386,7 +391,8 @@ Value *llvm::EmitFPutS(Value *Str, Value *File, IRBuilder<> &B,
   AttributeWithIndex AWI[3];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
   AWI[1] = AttributeWithIndex::get(M->getContext(), 2, Attributes::NoCapture);
-  AWI[2] = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                   Attributes::NoUnwind);
   StringRef FPutsName = TLI->getName(LibFunc::fputs);
   Constant *F;
   if (File->getType()->isPointerTy())
@@ -417,7 +423,8 @@ Value *llvm::EmitFWrite(Value *Ptr, Value *Size, Value *File,
   AttributeWithIndex AWI[3];
   AWI[0] = AttributeWithIndex::get(M->getContext(), 1, Attributes::NoCapture);
   AWI[1] = AttributeWithIndex::get(M->getContext(), 4, Attributes::NoCapture);
-  AWI[2] = AttributeWithIndex::get(M->getContext(), ~0u, Attributes::NoUnwind);
+  AWI[2] = AttributeWithIndex::get(M->getContext(), AttrListPtr::FunctionIndex,
+                                   Attributes::NoUnwind);
   LLVMContext &Context = B.GetInsertBlock()->getContext();
   StringRef FWriteName = TLI->getName(LibFunc::fwrite);
   Constant *F;
diff --git a/lib/Transforms/Utils/CloneFunction.cpp b/lib/Transforms/Utils/CloneFunction.cpp
index 831f94afb4..7ba9f6d9d2 100644
--- a/lib/Transforms/Utils/CloneFunction.cpp
+++ b/lib/Transforms/Utils/CloneFunction.cpp
@@ -98,11 +98,13 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
         Anew->addAttr( OldFunc->getAttributes()
                        .getParamAttributes(I->getArgNo() + 1));
     NewFunc->setAttributes(NewFunc->getAttributes()
-                           .addAttr(NewFunc->getContext(), 0,
+                           .addAttr(NewFunc->getContext(),
+                                    AttrListPtr::ReturnIndex,
                                     OldFunc->getAttributes()
                                      .getRetAttributes()));
     NewFunc->setAttributes(NewFunc->getAttributes()
-                           .addAttr(NewFunc->getContext(), ~0,
+                           .addAttr(NewFunc->getContext(),
+                                    AttrListPtr::FunctionIndex,
                                     OldFunc->getAttributes()
                                      .getFnAttributes()));
 
diff --git a/lib/VMCore/Core.cpp b/lib/VMCore/Core.cpp
index 6643ad6e9a..9eb7e10840 100644
--- a/lib/VMCore/Core.cpp
+++ b/lib/VMCore/Core.cpp
@@ -1383,7 +1383,7 @@ void LLVMAddFunctionAttr(LLVMValueRef Fn, LLVMAttribute PA) {
   const AttrListPtr PAL = Func->getAttributes();
   Attributes::Builder B(PA);
   const AttrListPtr PALnew =
-    PAL.addAttr(Func->getContext(), ~0U,
+    PAL.addAttr(Func->getContext(), AttrListPtr::FunctionIndex,
                 Attributes::get(Func->getContext(), B));
   Func->setAttributes(PALnew);
 }
@@ -1393,7 +1393,7 @@ void LLVMRemoveFunctionAttr(LLVMValueRef Fn, LLVMAttribute PA) {
   const AttrListPtr PAL = Func->getAttributes();
   Attributes::Builder B(PA);
   const AttrListPtr PALnew =
-    PAL.removeAttr(Func->getContext(), ~0U,
+    PAL.removeAttr(Func->getContext(), AttrListPtr::FunctionIndex,
                    Attributes::get(Func->getContext(), B));
   Func->setAttributes(PALnew);
 }
diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index e807edc512..13c4a5d257 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -343,10 +343,11 @@ void CallInst::removeAttribute(unsigned i, Attributes attr) {
 }
 
 bool CallInst::hasFnAttr(Attributes::AttrVal A) const {
-  if (AttributeList.getParamAttributes(~0U).hasAttribute(A))
+  if (AttributeList.getParamAttributes(AttrListPtr::FunctionIndex)
+      .hasAttribute(A))
     return true;
   if (const Function *F = getCalledFunction())
-    return F->getParamAttributes(~0U).hasAttribute(A);
+    return F->getParamAttributes(AttrListPtr::FunctionIndex).hasAttribute(A);
   return false;
 }
 
@@ -571,10 +572,11 @@ void InvokeInst::setSuccessorV(unsigned idx, BasicBlock *B) {
 }
 
 bool InvokeInst::hasFnAttr(Attributes::AttrVal A) const {
-  if (AttributeList.getParamAttributes(~0U).hasAttribute(A))
+  if (AttributeList.getParamAttributes(AttrListPtr::FunctionIndex).
+      hasAttribute(A))
     return true;
   if (const Function *F = getCalledFunction())
-    return F->getParamAttributes(~0U).hasAttribute(A);
+    return F->getParamAttributes(AttrListPtr::FunctionIndex).hasAttribute(A);
   return false;
 }