[llvm] e71686e - [TargetParser] Avoid repeated hash lookups (NFC) (#131555)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-17T07:42:50-07:00
New Revision: e71686ed1539abe8ec68a4efa010f5ede13e9888

URL: https://github.com/llvm/llvm-project/commit/e71686ed1539abe8ec68a4efa010f5ede13e9888
DIFF: https://github.com/llvm/llvm-project/commit/e71686ed1539abe8ec68a4efa010f5ede13e9888.diff

LOG: [TargetParser] Avoid repeated hash lookups (NFC) (#131555)

Added: 
    

Modified: 
    llvm/lib/TargetParser/RISCVISAInfo.cpp

Removed: 
    


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diff  --git a/llvm/lib/TargetParser/RISCVISAInfo.cpp b/llvm/lib/TargetParser/RISCVISAInfo.cpp
index ecd397f451c79..f7b487688d352 100644
--- a/llvm/lib/TargetParser/RISCVISAInfo.cpp
+++ b/llvm/lib/TargetParser/RISCVISAInfo.cpp
@@ -839,10 +839,11 @@ void RISCVISAInfo::updateImplication() {
     std::for_each(Range.first, Range.second,
                   [&](const ImpliedExtsEntry &Implied) {
                     const char *ImpliedExt = Implied.ImpliedExt;
-                    if (Exts.count(ImpliedExt))
+                    auto [It, Inserted] = Exts.try_emplace(ImpliedExt);
+                    if (!Inserted)
                       return;
                     auto Version = findDefaultVersion(ImpliedExt);
-                    Exts[ImpliedExt] = *Version;
+                    It->second = *Version;
                     WorkList.push_back(ImpliedExt);
                   });
   }