[llvm-branch-commits] [llvm] 86021d9 - [X86] Avoid a std::string copy by replacing auto with const auto&. NFC.

[Simon Pilgrim via llvm-branch-commits]

Author: Simon Pilgrim
Date: 2021-01-21T11:04:07Z
New Revision: 86021d98d3f8b27f7956cee04f11505c2e836e81

URL: https://github.com/llvm/llvm-project/commit/86021d98d3f8b27f7956cee04f11505c2e836e81
DIFF: https://github.com/llvm/llvm-project/commit/86021d98d3f8b27f7956cee04f11505c2e836e81.diff

LOG: [X86] Avoid a std::string copy by replacing auto with const auto&. NFC.

Fixes msvc analyzer warning.

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86ISelLowering.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 7cd17f109935..c5cc23f6236e 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -2516,11 +2516,11 @@ Value *X86TargetLowering::getIRStackGuard(IRBuilder<> &IRB) const {
       if (Offset == (unsigned)-1)
         Offset = (Subtarget.is64Bit()) ? 0x28 : 0x14;
 
-      auto GuardReg = getTargetMachine().Options.StackProtectorGuardReg;
-        if (GuardReg == "fs")
-          AddressSpace = X86AS::FS;
-        else if (GuardReg == "gs")
-          AddressSpace = X86AS::GS;
+      const auto &GuardReg = getTargetMachine().Options.StackProtectorGuardReg;
+      if (GuardReg == "fs")
+        AddressSpace = X86AS::FS;
+      else if (GuardReg == "gs")
+        AddressSpace = X86AS::GS;
       return SegmentOffset(IRB, Offset, AddressSpace);
     }
   }