Add some operators the PowerPC backend needs to efficiently and correctly

generate conditional branches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22214 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 0 deletions

diff --git a/include/llvm/ADT/ilist b/include/llvm/ADT/ilist
index 877e1445f4..1d01b63fe7 100644
--- a/include/llvm/ADT/ilist
+++ b/include/llvm/ADT/ilist
@@ -169,6 +169,26 @@ void operator+(int, ilist_iterator<T>);
 template<typename T>
 void operator+(ilist_iterator<T>,int);
 
+// operator!=/operator== - Allow mixed comparisons without dereferencing
+// the iterator, which could very likely be pointing to end().
+template<typename T>
+bool operator!=(const T* LHS, const ilist_iterator<const T> &RHS) {
+  return LHS != RHS.getNodePtrUnchecked();
+}
+template<typename T>
+bool operator==(const T* LHS, const ilist_iterator<const T> &RHS) {
+  return LHS == RHS.getNodePtrUnchecked();
+}
+template<typename T>
+bool operator!=(T* LHS, const ilist_iterator<T> &RHS) {
+  return LHS != RHS.getNodePtrUnchecked();
+}
+template<typename T>
+bool operator==(T* LHS, const ilist_iterator<T> &RHS) {
+  return LHS == RHS.getNodePtrUnchecked();
+}
+
+
 // Allow ilist_iterators to convert into pointers to a node automatically when
 // used by the dyn_cast, cast, isa mechanisms...