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

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-risc-v

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>

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.


---
Full diff: https://github.com/llvm/llvm-project/pull/144243.diff


1 Files Affected:

- (modified) llvm/lib/TargetParser/RISCVISAInfo.cpp (+1-2) 


``````````diff
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 '-'

``````````

</details>


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