[Analysis] Avoid repeated hash lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-clang-analysis

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/110949.diff

1 Files Affected:

• (modified) clang/lib/Analysis/ExprMutationAnalyzer.cpp (+2-3)

diff --git a/clang/lib/Analysis/ExprMutationAnalyzer.cpp b/clang/lib/Analysis/ExprMutationAnalyzer.cpp
index 6d726ae44104ed..5a95ef36d05024 100644
--- a/clang/lib/Analysis/ExprMutationAnalyzer.cpp
+++ b/clang/lib/Analysis/ExprMutationAnalyzer.cpp
@@ -231,12 +231,11 @@ ExprMutationAnalyzer::Analyzer::findPointeeMutation(const Decl *Dec) {
 const Stmt *ExprMutationAnalyzer::Analyzer::findMutationMemoized(
     const Expr *Exp, llvm::ArrayRef<MutationFinder> Finders,
     Memoized::ResultMap &MemoizedResults) {
-  const auto Memoized = MemoizedResults.find(Exp);
-  if (Memoized != MemoizedResults.end())
+  auto [Memoized, Inserted] = MemoizedResults.try_emplace(Exp);
+  if (!Inserted)
     return Memoized->second;
 
   // Assume Exp is not mutated before analyzing Exp.
-  MemoizedResults[Exp] = nullptr;
   if (isUnevaluated(Exp))
     return nullptr;
 

[llvmbot]

@llvm/pr-subscribers-clang

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/110949.diff

1 Files Affected:

• (modified) clang/lib/Analysis/ExprMutationAnalyzer.cpp (+2-3)

diff --git a/clang/lib/Analysis/ExprMutationAnalyzer.cpp b/clang/lib/Analysis/ExprMutationAnalyzer.cpp
index 6d726ae44104ed..5a95ef36d05024 100644
--- a/clang/lib/Analysis/ExprMutationAnalyzer.cpp
+++ b/clang/lib/Analysis/ExprMutationAnalyzer.cpp
@@ -231,12 +231,11 @@ ExprMutationAnalyzer::Analyzer::findPointeeMutation(const Decl *Dec) {
 const Stmt *ExprMutationAnalyzer::Analyzer::findMutationMemoized(
     const Expr *Exp, llvm::ArrayRef<MutationFinder> Finders,
     Memoized::ResultMap &MemoizedResults) {
-  const auto Memoized = MemoizedResults.find(Exp);
-  if (Memoized != MemoizedResults.end())
+  auto [Memoized, Inserted] = MemoizedResults.try_emplace(Exp);
+  if (!Inserted)
     return Memoized->second;
 
   // Assume Exp is not mutated before analyzing Exp.
-  MemoizedResults[Exp] = nullptr;
   if (isUnevaluated(Exp))
     return nullptr;