MachineCSE.cpp - use auto const& iterator in for-range loop to avoid …

…copies. NFCI.
llvm · Sep 21, 2020 · ce294ff · ce294ff
1 parent 604206b
commit ce294ff
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/llvm/lib/CodeGen/MachineCSE.cpp b/llvm/lib/CodeGen/MachineCSE.cpp
@@ -777,11 +777,11 @@ bool MachineCSE::isPRECandidate(MachineInstr *MI) {
       MI->getNumExplicitDefs() != 1)
     return false;
 
-  for (auto def : MI->defs())
+  for (const auto &def : MI->defs())
     if (!Register::isVirtualRegister(def.getReg()))
       return false;
 
-  for (auto use : MI->uses())
+  for (const auto &use : MI->uses())
     if (use.isReg() && !Register::isVirtualRegister(use.getReg()))
       return false;