From 9eddc1cf310c49c0f1f90cbde3687b2610a46689 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Thu, 8 Mar 2012 07:42:18 +0000
Subject: [PATCH] [ADT] Change the trivial FoldingSetNodeID::Add* methods to be
 inline, reapplied with a fix for the longstanding over-read of 32-bit pointer
 values.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152300 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/ADT/FoldingSet.h | 51 +++++++++++++++++++++++++++++++++++
 lib/Support/FoldingSet.cpp    | 44 +-----------------------------
 2 files changed, 52 insertions(+), 43 deletions(-)

diff --git a/include/llvm/ADT/FoldingSet.h b/include/llvm/ADT/FoldingSet.h
index d2e0b8f91b2..028f2df9cac 100644
--- a/include/llvm/ADT/FoldingSet.h
+++ b/include/llvm/ADT/FoldingSet.h
@@ -17,6 +17,7 @@
 #define LLVM_ADT_FOLDINGSET_H
 
 #include "llvm/Support/DataTypes.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 
@@ -310,6 +311,7 @@ public:
   void AddInteger(unsigned long long I);
   void AddBoolean(bool B) { AddInteger(B ? 1U : 0U); }
   void AddString(StringRef String);
+  /// AddNodeID - Adds the Bit data of another ID to *this.
   void AddNodeID(const FoldingSetNodeID &ID);
 
   template <typename T>
@@ -675,6 +677,55 @@ template<typename T> struct FoldingSetTrait<T*> {
     ID.AddPointer(X);
   }
 };
+
+//===----------------------------------------------------------------------===//
+// FoldingSetNodeID Inline function definitions
+
+/// Add* - Add various data types to Bit data.
+///
+inline void FoldingSetNodeID::AddPointer(const void *Ptr) {
+  // Note: this adds pointers to the hash using sizes and endianness that
+  // depend on the host.  It doesn't matter however, because hashing on
+  // pointer values in inherently unstable.  Nothing  should depend on the 
+  // ordering of nodes in the folding set.
+  if (sizeof(void*) == sizeof(unsigned))
+    AddInteger((unsigned) (unsigned long long) Ptr);
+  else if (sizeof(void*) == sizeof(unsigned long long)) {
+    AddInteger((unsigned long long) Ptr);
+  } else {
+    llvm_unreachable("unexpected sizeof(void*)");
+  }
+}
+inline void FoldingSetNodeID::AddInteger(signed I) {
+  Bits.push_back(I);
+}
+inline void FoldingSetNodeID::AddInteger(unsigned I) {
+  Bits.push_back(I);
+}
+inline void FoldingSetNodeID::AddInteger(long I) {
+  AddInteger((unsigned long)I);
+}
+inline void FoldingSetNodeID::AddInteger(unsigned long I) {
+  if (sizeof(long) == sizeof(int))
+    AddInteger(unsigned(I));
+  else if (sizeof(long) == sizeof(long long)) {
+    AddInteger((unsigned long long)I);
+  } else {
+    llvm_unreachable("unexpected sizeof(long)");
+  }
+}
+inline void FoldingSetNodeID::AddInteger(long long I) {
+  AddInteger((unsigned long long)I);
+}
+inline void FoldingSetNodeID::AddInteger(unsigned long long I) {
+  AddInteger(unsigned(I));
+  if ((uint64_t)(unsigned)I != I)
+    Bits.push_back(unsigned(I >> 32));
+}
+inline void FoldingSetNodeID::AddNodeID(const FoldingSetNodeID &ID) {
+  Bits.append(ID.Bits.begin(), ID.Bits.end());
+}
+
 } // End of namespace llvm.
 
 #endif
diff --git a/lib/Support/FoldingSet.cpp b/lib/Support/FoldingSet.cpp
index e029970b586..d182d480354 100644
--- a/lib/Support/FoldingSet.cpp
+++ b/lib/Support/FoldingSet.cpp
@@ -41,43 +41,6 @@ bool FoldingSetNodeIDRef::operator==(FoldingSetNodeIDRef RHS) const {
 //===----------------------------------------------------------------------===//
 // FoldingSetNodeID Implementation
 
-/// Add* - Add various data types to Bit data.
-///
-void FoldingSetNodeID::AddPointer(const void *Ptr) {
-  // Note: this adds pointers to the hash using sizes and endianness that
-  // depend on the host.  It doesn't matter however, because hashing on
-  // pointer values in inherently unstable.  Nothing  should depend on the 
-  // ordering of nodes in the folding set.
-  Bits.append(reinterpret_cast<unsigned *>(&Ptr),
-              reinterpret_cast<unsigned *>(&Ptr+1));
-}
-void FoldingSetNodeID::AddInteger(signed I) {
-  Bits.push_back(I);
-}
-void FoldingSetNodeID::AddInteger(unsigned I) {
-  Bits.push_back(I);
-}
-void FoldingSetNodeID::AddInteger(long I) {
-  AddInteger((unsigned long)I);
-}
-void FoldingSetNodeID::AddInteger(unsigned long I) {
-  if (sizeof(long) == sizeof(int))
-    AddInteger(unsigned(I));
-  else if (sizeof(long) == sizeof(long long)) {
-    AddInteger((unsigned long long)I);
-  } else {
-    llvm_unreachable("unexpected sizeof(long)");
-  }
-}
-void FoldingSetNodeID::AddInteger(long long I) {
-  AddInteger((unsigned long long)I);
-}
-void FoldingSetNodeID::AddInteger(unsigned long long I) {
-  AddInteger(unsigned(I));
-  if ((uint64_t)(unsigned)I != I)
-    Bits.push_back(unsigned(I >> 32));
-}
-
 void FoldingSetNodeID::AddString(StringRef String) {
   unsigned Size =  String.size();
   Bits.push_back(Size);
@@ -129,12 +92,7 @@ void FoldingSetNodeID::AddString(StringRef String) {
   Bits.push_back(V);
 }
 
-// AddNodeID - Adds the Bit data of another ID to *this.
-void FoldingSetNodeID::AddNodeID(const FoldingSetNodeID &ID) {
-  Bits.append(ID.Bits.begin(), ID.Bits.end());
-}
-
-/// ComputeHash - Compute a strong hash value for this FoldingSetNodeID, used to 
+/// ComputeHash - Compute a strong hash value for this FoldingSetNodeID, used to
 /// lookup the node in the FoldingSetImpl.
 unsigned FoldingSetNodeID::ComputeHash() const {
   return FoldingSetNodeIDRef(Bits.data(), Bits.size()).ComputeHash();
-- 
2.34.1