vendor/llvm/llvm-release_34-r208032

3 files changed, 11 insertions, 2 deletions

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 43f72c5ef9b4..69cf8d9a909a 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -8547,7 +8547,10 @@ struct MemOpLink {
 // base ptr.
 struct ConsecutiveMemoryChainSorter {
   bool operator()(MemOpLink LHS, MemOpLink RHS) {
-    return LHS.OffsetFromBase < RHS.OffsetFromBase;
+    return
+        LHS.OffsetFromBase < RHS.OffsetFromBase ||
+        (LHS.OffsetFromBase == RHS.OffsetFromBase &&
+         LHS.SequenceNum > RHS.SequenceNum);
   }
 };
 
diff --git a/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp b/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
index 2c3cdccb56e8..3fb2d9bdf55e 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeVectorOps.cpp
@@ -210,6 +210,7 @@ SDValue VectorLegalizer::LegalizeOp(SDValue Op) {
   case ISD::SRL:
   case ISD::ROTL:
   case ISD::ROTR:
+  case ISD::BSWAP:
   case ISD::CTLZ:
   case ISD::CTTZ:
   case ISD::CTLZ_ZERO_UNDEF:
diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
index 054e3dd840b5..c1893c9231f0 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
@@ -219,8 +219,11 @@ void ScheduleDAGSDNodes::ClusterNeighboringLoads(SDNode *Node) {
   DenseMap<long long, SDNode*> O2SMap;  // Map from offset to SDNode.
   bool Cluster = false;
   SDNode *Base = Node;
+  // This algorithm requires a reasonably low use count before finding a match
+  // to avoid uselessly blowing up compile time in large blocks.
+  unsigned UseCount = 0;
   for (SDNode::use_iterator I = Chain->use_begin(), E = Chain->use_end();
-       I != E; ++I) {
+       I != E && UseCount < 100; ++I, ++UseCount) {
     SDNode *User = *I;
     if (User == Node || !Visited.insert(User))
       continue;
@@ -237,6 +240,8 @@ void ScheduleDAGSDNodes::ClusterNeighboringLoads(SDNode *Node) {
     if (Offset2 < Offset1)
       Base = User;
     Cluster = true;
+    // Reset UseCount to allow more matches.
+    UseCount = 0;
   }
 
   if (!Cluster)