Subzero: Improve non-MINIMAL string performance.

src/IceTargetLoweringMIPS32.cpp

Index: src/IceTargetLoweringMIPS32.cpp
diff --git a/src/IceTargetLoweringMIPS32.cpp b/src/IceTargetLoweringMIPS32.cpp
index de8afbfd8058662aca6718b4cac57052fd770b75..8b12f8879dd8c5d85427fe19c4a3378c9538e874 100644
--- a/src/IceTargetLoweringMIPS32.cpp
+++ b/src/IceTargetLoweringMIPS32.cpp
@@ -434,7 +434,7 @@ void TargetMIPS32::lowerArguments() {
       Variable *RegisterArg = Func->makeVariable(Ty);
       auto *RegisterArg64On32 = llvm::cast<Variable64On32>(RegisterArg);
       if (BuildDefs::dump())
-        RegisterArg64On32->setName(Func, "home_reg:" + Arg->getName(Func));
+        RegisterArg64On32->setName(Func, "home_reg:" + Arg->getName());
       RegisterArg64On32->initHiLo(Func);
       RegisterArg64On32->setIsArg();
       RegisterArg64On32->getLo()->setRegNum(RegLo);
@@ -451,7 +451,7 @@ void TargetMIPS32::lowerArguments() {
       ++NumGPRRegsUsed;
       Variable *RegisterArg = Func->makeVariable(Ty);
       if (BuildDefs::dump()) {
-        RegisterArg->setName(Func, "home_reg:" + Arg->getName(Func));
+        RegisterArg->setName(Func, "home_reg:" + Arg->getName());
       }
       RegisterArg->setRegNum(RegNum);
       RegisterArg->setIsArg();