[llvm] 24bc5f3 - [RISCV] Replace std::string with StringRef in RISCVISAInfo. NFC

[Craig Topper via llvm-commits]

Author: Craig Topper
Date: 2023-03-29T22:24:08-07:00
New Revision: 24bc5f3f3104a48351b95516ec5a9e6773c6da4a

URL: https://github.com/llvm/llvm-project/commit/24bc5f3f3104a48351b95516ec5a9e6773c6da4a
DIFF: https://github.com/llvm/llvm-project/commit/24bc5f3f3104a48351b95516ec5a9e6773c6da4a.diff

LOG: [RISCV] Replace std::string with StringRef in RISCVISAInfo. NFC

We're just slicing off part of an existing StringRef. No need to
allocate any new storage.

Added: 
    

Modified: 
    llvm/lib/Support/RISCVISAInfo.cpp

Removed: 
    


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diff  --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
index 96dee400643a..bd243f7a0d5f 100644
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -713,10 +713,10 @@ RISCVISAInfo::parseArchString(StringRef Arch, bool EnableExperimentalExtension,
     // Move to next char to prevent repeated letter.
     ++StdExtsItr;
 
-    std::string Next;
+    StringRef Next;
     unsigned Major, Minor, ConsumeLength;
     if (std::next(I) != E)
-      Next = std::string(std::next(I), E);
+      Next = StringRef(std::next(I), E - std::next(I));
     if (auto E = getExtensionVersion(StringRef(&C, 1), Next, Major, Minor,
                                      ConsumeLength, EnableExperimentalExtension,
                                      ExperimentalExtensionVersionCheck)) {