[PATCH] D124985: [CodeGenPrepare] Use const reference to avoid unnecessary APInt copy. NFC

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: MatzeB, RKSimon, spatel.
Herald added subscribers: StephenFan, hiraditya.
Herald added a project: All.
craig.topper requested review of this revision.
Herald added a project: LLVM.

Spotted while looking at Matthias' patches.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D124985

Files:
  llvm/lib/CodeGen/CodeGenPrepare.cpp


Index: llvm/lib/CodeGen/CodeGenPrepare.cpp
===================================================================
--- llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -7019,7 +7019,7 @@
   ExtInst->setDebugLoc(SI->getDebugLoc());
   SI->setCondition(ExtInst);
   for (auto Case : SI->cases()) {
-    APInt NarrowConst = Case.getCaseValue()->getValue();
+    const APInt &NarrowConst = Case.getCaseValue()->getValue();
     APInt WideConst = (ExtType == Instruction::ZExt) ?
                       NarrowConst.zext(RegWidth) : NarrowConst.sext(RegWidth);
     Case.setValue(ConstantInt::get(Context, WideConst));


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