[llvm] 0cffcd3 - [X86] Avoid repeated hash lookups (NFC) (#130393)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-08T01:03:13-08:00
New Revision: 0cffcd3932c5ff6a681026b9d2c482b28be85eba

URL: https://github.com/llvm/llvm-project/commit/0cffcd3932c5ff6a681026b9d2c482b28be85eba
DIFF: https://github.com/llvm/llvm-project/commit/0cffcd3932c5ff6a681026b9d2c482b28be85eba.diff

LOG: [X86] Avoid repeated hash lookups (NFC) (#130393)

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86PreTileConfig.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/X86/X86PreTileConfig.cpp b/llvm/lib/Target/X86/X86PreTileConfig.cpp
index e8d90da1fb1e0..f2ec4369a5ca4 100644
--- a/llvm/lib/Target/X86/X86PreTileConfig.cpp
+++ b/llvm/lib/Target/X86/X86PreTileConfig.cpp
@@ -400,8 +400,9 @@ bool X86PreTileConfig::runOnMachineFunction(MachineFunction &MF) {
     // A given point might be forked due to shape conditions are not met.
     for (MIRef I : InsertPoints) {
       // Make sure we insert ldtilecfg after the last shape def in MBB.
-      if (ShapeBBs.count(I.MBB) && I < ShapeBBs[I.MBB].back())
-        I = ShapeBBs[I.MBB].back();
+      auto It = ShapeBBs.find(I.MBB);
+      if (It != ShapeBBs.end() && I < It->second.back())
+        I = It->second.back();
       // There're chances the MBB is sunk more than once. Record it to avoid
       // multi insert.
       if (VisitedOrInserted.insert(I).second) {