Make llvm::StringRef to std::string conversions explicit.

This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.

This doesn't actually modify StringRef yet, I'll do that in a follow-up.

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/tools/llvm-ml/llvm-ml.cpp b/llvm/tools/llvm-ml/llvm-ml.cpp
index 38c4861..1b30f3e 100644
--- a/llvm/tools/llvm-ml/llvm-ml.cpp
+++ b/llvm/tools/llvm-ml/llvm-ml.cpp
@@ -278,7 +278,7 @@ int main(int argc, char **argv) {
   }
   for (const auto &Arg : DebugPrefixMap) {
     const auto &KV = StringRef(Arg).split('=');
-    Ctx.addDebugPrefixMapEntry(KV.first, KV.second);
+    Ctx.addDebugPrefixMapEntry(std::string(KV.first), std::string(KV.second));
   }
   if (!MainFileName.empty())
     Ctx.setMainFileName(MainFileName);