[llvm] 618ac90 - [TableGen] Avoid repeated hash lookups (NFC) (#123018)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-01-15T07:57:30-08:00
New Revision: 618ac908db72c312e1fbdfe974b4a084b4fc4c45

URL: https://github.com/llvm/llvm-project/commit/618ac908db72c312e1fbdfe974b4a084b4fc4c45
DIFF: https://github.com/llvm/llvm-project/commit/618ac908db72c312e1fbdfe974b4a084b4fc4c45.diff

LOG: [TableGen] Avoid repeated hash lookups (NFC) (#123018)

Added: 
    

Modified: 
    llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp
    llvm/utils/TableGen/GlobalISelEmitter.cpp

Removed: 
    


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diff  --git a/llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp b/llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp
index 149ba7a1d9032d..bc300c3461100e 100644
--- a/llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelCombinerEmitter.cpp
@@ -2645,8 +2645,8 @@ GICombinerEmitter::buildMatchTable(MutableArrayRef<RuleMatcher> Rules) {
   for (RuleMatcher &Rule : Rules) {
     const StringRef Opcode = Rule.getOpcode();
     assert(!Opcode.empty() && "Didn't expect an undefined opcode");
-    if (OpcodeOrder.count(Opcode) == 0)
-      OpcodeOrder[Opcode] = CurrentOrdering++;
+    if (OpcodeOrder.try_emplace(Opcode, CurrentOrdering).second)
+      ++CurrentOrdering;
   }
 
   llvm::stable_sort(InputRules, [&OpcodeOrder](const Matcher *A,

diff  --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
index 3b334ea4ce152c..04ebdbb0ffc90b 100644
--- a/llvm/utils/TableGen/GlobalISelEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -2216,8 +2216,8 @@ GlobalISelEmitter::buildMatchTable(MutableArrayRef<RuleMatcher> Rules,
   for (RuleMatcher &Rule : Rules) {
     const StringRef Opcode = Rule.getOpcode();
     assert(!Opcode.empty() && "Didn't expect an undefined opcode");
-    if (OpcodeOrder.count(Opcode) == 0)
-      OpcodeOrder[Opcode] = CurrentOrdering++;
+    if (OpcodeOrder.try_emplace(Opcode, CurrentOrdering).second)
+      ++CurrentOrdering;
   }
 
   llvm::stable_sort(