[llvm] [MC] Avoid useless triple copy (PR #103026)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-mc

Author: Alexis Engelke (aengelke)

<details>
<summary>Changes</summary>

Copying a triple is cheap, but not free, so let's not do that if there's no reason to do so.

Trivial cleanup.

---
Full diff: https://github.com/llvm/llvm-project/pull/103026.diff


2 Files Affected:

- (modified) llvm/include/llvm/CodeGen/BasicTTIImpl.h (+1-1) 
- (modified) llvm/lib/MC/MCObjectFileInfo.cpp (+1-1) 


``````````diff
diff --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
index c2bc1353ee8838..279cfb5aa47d6f 100644
--- a/llvm/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
@@ -525,7 +525,7 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
         TM.getCodeModel() == CodeModel::Large)
       return false;
 
-    Triple TargetTriple = TM.getTargetTriple();
+    const Triple &TargetTriple = TM.getTargetTriple();
     if (!TargetTriple.isArch64Bit())
       return false;
 
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index 6dadd9752646f2..f37e138edc36b1 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -1024,7 +1024,7 @@ void MCObjectFileInfo::initMCObjectFileInfo(MCContext &MCCtx, bool PIC,
   DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
   DwarfAccelTypesSection = nullptr;     // Used only by selected targets.
 
-  Triple TheTriple = Ctx->getTargetTriple();
+  const Triple &TheTriple = Ctx->getTargetTriple();
   switch (Ctx->getObjectFileType()) {
   case MCContext::IsMachO:
     initMachOMCObjectFileInfo(TheTriple);

``````````

</details>


https://github.com/llvm/llvm-project/pull/103026