[llvm] [BOLT] Use StringRef::starts_with (NFC) (PR #139437)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-bolt

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/139437.diff


1 Files Affected:

- (modified) bolt/lib/Rewrite/BuildIDRewriter.cpp (+1-2) 


``````````diff
diff --git a/bolt/lib/Rewrite/BuildIDRewriter.cpp b/bolt/lib/Rewrite/BuildIDRewriter.cpp
index 83d0c9bfe182a..d50416fb80c6c 100644
--- a/bolt/lib/Rewrite/BuildIDRewriter.cpp
+++ b/bolt/lib/Rewrite/BuildIDRewriter.cpp
@@ -78,8 +78,7 @@ Error BuildIDRewriter::sectionInitializer() {
                                  "out of bounds while reading note section: %s",
                                  toString(Cursor.takeError()).c_str());
 
-      if (Type == ELF::NT_GNU_BUILD_ID && Name.substr(0, 3) == "GNU" &&
-          DescSz) {
+      if (Type == ELF::NT_GNU_BUILD_ID && Name.starts_with("GNU") && DescSz) {
         BuildIDSection = NoteSection;
         BuildID = Desc;
         BC.setFileBuildID(getPrintableBuildID(Desc));

``````````

</details>


https://github.com/llvm/llvm-project/pull/139437