[llvm] [AsmPrinter] Avoid repeated hash lookups (NFC) (PR #125814)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-debuginfo

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/125814.diff


1 Files Affected:

- (modified) llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp (+5-2) 


``````````diff
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index 6cf05fda544ed3..ddf0275ddfe6a4 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -1757,8 +1757,11 @@ void DwarfCompileUnit::createBaseTypeDIEs() {
 DIE *DwarfCompileUnit::getLexicalBlockDIE(const DILexicalBlock *LB) {
   // Assume if there is an abstract tree all the DIEs are already emitted.
   bool isAbstract = getAbstractScopeDIEs().count(LB->getSubprogram());
-  if (isAbstract && getAbstractScopeDIEs().count(LB))
-    return getAbstractScopeDIEs()[LB];
+  if (isAbstract) {
+    auto &DIEs = getAbstractScopeDIEs();
+    if (auto It = DIEs.find(LB); It != DIEs.end())
+      return It->second;
+  }
   assert(!isAbstract && "Missed lexical block DIE in abstract tree!");
 
   // Return a concrete DIE if it exists or nullptr otherwise.

``````````

</details>


https://github.com/llvm/llvm-project/pull/125814