[llvm] d07dc5a - [AMDGPU] Avoid repeated hash lookups (NFC) (#110788)

[via llvm-commits]

Author: Kazu Hirata
Date: 2024-10-02T06:52:21-07:00
New Revision: d07dc5aa50e6ae6f41912b9c11cc468655f01553

URL: https://github.com/llvm/llvm-project/commit/d07dc5aa50e6ae6f41912b9c11cc468655f01553
DIFF: https://github.com/llvm/llvm-project/commit/d07dc5aa50e6ae6f41912b9c11cc468655f01553.diff

LOG: [AMDGPU] Avoid repeated hash lookups (NFC) (#110788)

Added: 
    

Modified: 
    llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp

Removed: 
    


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diff  --git a/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp b/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp
index 4e913d1b32e1f1..aaad2a56de2cd0 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUIGroupLP.cpp
@@ -2123,13 +2123,13 @@ bool MFMASmallGemmSingleWaveOpt::applyIGLPStrategy(
             continue;
           }
 
-          if (!VMEMLookup.contains(MI)) {
+          auto [It, Inserted] = VMEMLookup.try_emplace(MI, *I);
+          if (Inserted) {
             MissedAny = true;
-            VMEMLookup[MI] = *I;
             continue;
           }
 
-          Cand = VMEMLookup[MI];
+          Cand = It->second;
           if (llvm::is_contained(Counted, Cand)) {
             MissedAny = true;
             break;