[llvm] [Support] Use a hetrogenous lookup with std::map (NFC) (PR #113075)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-support

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/113075.diff


1 Files Affected:

- (modified) llvm/lib/Support/VirtualFileSystem.cpp (+2-2) 


``````````diff
diff --git a/llvm/lib/Support/VirtualFileSystem.cpp b/llvm/lib/Support/VirtualFileSystem.cpp
index 928c0b5a24ed65..3e79ecf2fc7e35 100644
--- a/llvm/lib/Support/VirtualFileSystem.cpp
+++ b/llvm/lib/Support/VirtualFileSystem.cpp
@@ -750,7 +750,7 @@ class InMemoryFileAdaptor : public File {
 
 class InMemoryDirectory : public InMemoryNode {
   Status Stat;
-  std::map<std::string, std::unique_ptr<InMemoryNode>> Entries;
+  std::map<std::string, std::unique_ptr<InMemoryNode>, std::less<>> Entries;
 
 public:
   InMemoryDirectory(Status Stat)
@@ -766,7 +766,7 @@ class InMemoryDirectory : public InMemoryNode {
   UniqueID getUniqueID() const { return Stat.getUniqueID(); }
 
   InMemoryNode *getChild(StringRef Name) const {
-    auto I = Entries.find(Name.str());
+    auto I = Entries.find(Name);
     if (I != Entries.end())
       return I->second.get();
     return nullptr;

``````````

</details>


https://github.com/llvm/llvm-project/pull/113075