[flang] Avoid repeated hash lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-flang-fir-hlfir

@llvm/pr-subscribers-flang-codegen

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/124230.diff

1 Files Affected:

• (modified) flang/lib/Optimizer/CodeGen/BoxedProcedure.cpp (+2-4)

diff --git a/flang/lib/Optimizer/CodeGen/BoxedProcedure.cpp b/flang/lib/Optimizer/CodeGen/BoxedProcedure.cpp
index ad7272eaa9d3f3..c7c2dcede8aa67 100644
--- a/flang/lib/Optimizer/CodeGen/BoxedProcedure.cpp
+++ b/flang/lib/Optimizer/CodeGen/BoxedProcedure.cpp
@@ -69,11 +69,9 @@ class BoxprocTypeRewriter : public mlir::TypeConverter {
       return false;
     }
     if (auto recTy = mlir::dyn_cast<RecordType>(ty)) {
-      auto visited = visitedTypes.find(ty);
-      if (visited != visitedTypes.end())
+      auto [visited, inserted] = visitedTypes.try_emplace(ty, false);
+      if (!inserted)
         return visited->second;
-      [[maybe_unused]] auto newIt = visitedTypes.try_emplace(ty, false);
-      assert(newIt.second && "expected ty to not be in the map");
       bool wasAlreadyVisitingRecordType = needConversionIsVisitingRecordType;
       needConversionIsVisitingRecordType = true;
       bool result = false;

[jeanPerier]

Thanks, LGTM