[llvm] [RISCV] Use StringRef in a range-based for loop (NFC) (PR #144243)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/144243

When we iterate over std::vector<std::string>, we can directly assign
each element to StringRef.  We do not need to go through a separate
statement.


>From 832995c0d9816a06a39a15c9f90065d3c74528d5 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Fri, 13 Jun 2025 13:30:47 -0700
Subject: [PATCH] [RISCV] Use StringRef in a range-based for loop (NFC)

When we iterate over std::vector<std::string>, we can directly assign
each element to StringRef.  We do not need to go through a separate
statement.
---
 llvm/lib/TargetParser/RISCVISAInfo.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/llvm/lib/TargetParser/RISCVISAInfo.cpp b/llvm/lib/TargetParser/RISCVISAInfo.cpp
index e76ddd4b648dc..17c98332ab0af 100644
--- a/llvm/lib/TargetParser/RISCVISAInfo.cpp
+++ b/llvm/lib/TargetParser/RISCVISAInfo.cpp
@@ -449,8 +449,7 @@ RISCVISAInfo::parseFeatures(unsigned XLen,
   assert(XLen == 32 || XLen == 64);
   std::unique_ptr<RISCVISAInfo> ISAInfo(new RISCVISAInfo(XLen));
 
-  for (auto &Feature : Features) {
-    StringRef ExtName = Feature;
+  for (StringRef ExtName : Features) {
     assert(ExtName.size() > 1 && (ExtName[0] == '+' || ExtName[0] == '-'));
     bool Add = ExtName[0] == '+';
     ExtName = ExtName.drop_front(1); // Drop '+' or '-'