Some random comment, naming, and format changes.

Rename the AttributeImpl* from Attrs to pImpl to be consistent with other code.
Add comments where none were before. Or doxygen-ify other comments.

llvm-svn: 170767

2 files changed, 19 insertions, 12 deletions

diff --git a/llvm/lib/VMCore/AttributeImpl.h b/llvm/lib/VMCore/AttributeImpl.h
index 980c3837761..e27a0297dfa 100644
--- a/llvm/lib/VMCore/AttributeImpl.h
+++ b/llvm/lib/VMCore/AttributeImpl.h
@@ -6,10 +6,11 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-// This file defines various helper methods and classes used by LLVMContextImpl
-// for creating and managing attributes.
-//
+///
+/// \file
+/// \brief This file defines various helper methods and classes used by
+/// LLVMContextImpl for creating and managing attributes.
+///
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_ATTRIBUTESIMPL_H
@@ -22,6 +23,11 @@ namespace llvm {
 
 class LLVMContext;
 
+//===----------------------------------------------------------------------===//
+/// \class
+/// \brief This class represents a single, uniqued attribute. That attribute
+/// could be a single enum, a tuple, or a string. It uses a discriminated union
+/// to distinguish them.
 class AttributeImpl : public FoldingSetNode {
   uint64_t Bits;                // FIXME: We will be expanding this.
 public:
@@ -47,6 +53,9 @@ public:
   }
 };
 
+//===----------------------------------------------------------------------===//
+/// \class
+/// \brief This class represents a set of attributes.
 class AttributeSetImpl : public FoldingSetNode {
   // AttributesList is uniqued, these should not be publicly available.
   void operator=(const AttributeSetImpl &) LLVM_DELETED_FUNCTION;
diff --git a/llvm/lib/VMCore/Attributes.cpp b/llvm/lib/VMCore/Attributes.cpp
index 5bde5638a1e..d47f35aed39 100644
--- a/llvm/lib/VMCore/Attributes.cpp
+++ b/llvm/lib/VMCore/Attributes.cpp
@@ -62,22 +62,22 @@ Attribute Attribute::get(LLVMContext &Context, AttrBuilder &B) {
 }
 
 bool Attribute::hasAttribute(AttrVal Val) const {
-  return Attrs && Attrs->hasAttribute(Val);
+  return pImpl && pImpl->hasAttribute(Val);
 }
 
 bool Attribute::hasAttributes() const {
-  return Attrs && Attrs->hasAttributes();
+  return pImpl && pImpl->hasAttributes();
 }
 
 bool Attribute::hasAttributes(const Attribute &A) const {
-  return Attrs && Attrs->hasAttributes(A);
+  return pImpl && pImpl->hasAttributes(A);
 }
 
 /// This returns the alignment field of an attribute as a byte alignment value.
 unsigned Attribute::getAlignment() const {
   if (!hasAttribute(Attribute::Alignment))
     return 0;
-  return 1U << ((Attrs->getAlignment() >> 16) - 1);
+  return 1U << ((pImpl->getAlignment() >> 16) - 1);
 }
 
 /// This returns the stack alignment field of an attribute as a byte alignment
@@ -85,11 +85,11 @@ unsigned Attribute::getAlignment() const {
 unsigned Attribute::getStackAlignment() const {
   if (!hasAttribute(Attribute::StackAlignment))
     return 0;
-  return 1U << ((Attrs->getStackAlignment() >> 26) - 1);
+  return 1U << ((pImpl->getStackAlignment() >> 26) - 1);
 }
 
 uint64_t Attribute::Raw() const {
-  return Attrs ? Attrs->Raw() : 0;
+  return pImpl ? pImpl->Raw() : 0;
 }
 
 Attribute Attribute::typeIncompatible(Type *Ty) {
@@ -398,8 +398,6 @@ AttributeSet AttributeSet::get(LLVMContext &C,
 //===----------------------------------------------------------------------===//
 
 const AttributeSet &AttributeSet::operator=(const AttributeSet &RHS) {
-  if (AttrList == RHS.AttrList) return *this;
-
   AttrList = RHS.AttrList;
   return *this;
 }