Use array_pod_sort instead of std::sort for improved code size.

Use SmallVector instead of std::vector for better speed when indirectbr has
few successors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95879 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 477c1c701988841851cab1a23d4c0502289c6a95..6f60c7b624e490665b0bd26f0997ff38c4288306 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -2063,11 +2063,11 @@ void SelectionDAGBuilder::visitSwitch(SwitchInst &SI) {
 
 void SelectionDAGBuilder::visitIndirectBr(IndirectBrInst &I) {
   // Update machine-CFG edges with unique successors.
-  std::vector<BasicBlock*> succs;
+  SmallVector<BasicBlock*, 32> succs;
   succs.reserve(I.getNumSuccessors());
   for (unsigned i = 0, e = I.getNumSuccessors(); i != e; ++i)
     succs.push_back(I.getSuccessor(i));
-  std::sort(succs.begin(), succs.end());
+  array_pod_sort(succs.begin(), succs.end());
   succs.erase(std::unique(succs.begin(), succs.end()), succs.end());
   for (unsigned i = 0, e = succs.size(); i != e; ++i)
     CurMBB->addSuccessor(FuncInfo.MBBMap[succs[i]]);