Replace copy with a reference. (#82485)

These are relatively larger structures and we don't update them so ref should be fine
llvm · Mar 5, 2024 · 0e337c6 · 0e337c6
1 parent eaa9ef6
commit 0e337c6
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/llvm/lib/CodeGen/MachinePipeliner.cpp b/llvm/lib/CodeGen/MachinePipeliner.cpp
@@ -1334,7 +1334,7 @@ class HighRegisterPressureDetector {
         Register Reg = getLoopPhiReg(*MI, OrigMBB);
         UpdateTargetRegs(Reg);
       } else {
-        for (auto Use : ROMap.find(MI)->getSecond().Uses)
+        for (auto &Use : ROMap.find(MI)->getSecond().Uses)
           UpdateTargetRegs(Use.RegUnit);
       }
     }
@@ -1438,7 +1438,7 @@ class HighRegisterPressureDetector {
 
         const unsigned Iter = I - Stage;
 
-        for (auto Def : ROMap.find(MI)->getSecond().Defs)
+        for (auto &Def : ROMap.find(MI)->getSecond().Defs)
           InsertReg(LiveRegSets[Iter], Def.RegUnit);
 
         for (auto LastUse : LastUses[MI]) {