Remove the explicit SDNodeIterator::operator= in favor of the implicit default

There doesn't seem to be any need to assert that iterator assignment is
between iterators over the same node - if you want to reuse an iterator
variable to iterate another node, that's perfectly acceptable. Just
don't mix comparisons between iterators into disjoint sequences, as
usual.

llvm-svn: 231135

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/LiveStackAnalysis.cpp b/llvm/lib/CodeGen/LiveStackAnalysis.cpp
index 8a6ac251ab2..5c9c679e97b 100644
--- a/llvm/lib/CodeGen/LiveStackAnalysis.cpp
+++ b/llvm/lib/CodeGen/LiveStackAnalysis.cpp
@@ -61,8 +61,10 @@ LiveStacks::getOrCreateInterval(int Slot, const TargetRegisterClass *RC) {
   assert(Slot >= 0 && "Spill slot indice must be >= 0");
   SS2IntervalMap::iterator I = S2IMap.find(Slot);
   if (I == S2IMap.end()) {
-    I = S2IMap.insert(I, std::make_pair(Slot,
-            LiveInterval(TargetRegisterInfo::index2StackSlot(Slot), 0.0F)));
+    I = S2IMap.emplace(std::piecewise_construct, std::forward_as_tuple(Slot),
+                       std::forward_as_tuple(
+                           TargetRegisterInfo::index2StackSlot(Slot), 0.0F))
+            .first;
     S2RCMap.insert(std::make_pair(Slot, RC));
   } else {
     // Use the largest common subclass register class.