[llvm] 61afebd - [MemProf][NFC] Switch to DenseMaps (#93868)

[via llvm-commits]

Author: Teresa Johnson
Date: 2024-05-30T12:57:14-07:00
New Revision: 61afebdacc3b980fb82ea606d78d742847a133c3

URL: https://github.com/llvm/llvm-project/commit/61afebdacc3b980fb82ea606d78d742847a133c3
DIFF: https://github.com/llvm/llvm-project/commit/61afebdacc3b980fb82ea606d78d742847a133c3.diff

LOG: [MemProf][NFC] Switch to DenseMaps (#93868)

Change a couple of maps from std::map to DenseMap, which showed
a modest (3.6%) reduction in peak RSS.

Added: 
    

Modified: 
    llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp

Removed: 
    


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diff  --git a/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp b/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp
index c53b9451625c6..0512922e35ae9 100644
--- a/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp
+++ b/llvm/lib/Transforms/IPO/MemProfContextDisambiguation.cpp
@@ -552,13 +552,13 @@ class CallsiteContextGraph {
                       const DenseSet<uint32_t> &AllocContextIds);
 
   /// Map from each context ID to the AllocationType assigned to that context.
-  std::map<uint32_t, AllocationType> ContextIdToAllocationType;
+  DenseMap<uint32_t, AllocationType> ContextIdToAllocationType;
 
   /// Identifies the context node created for a stack id when adding the MIB
   /// contexts to the graph. This is used to locate the context nodes when
   /// trying to assign the corresponding callsites with those stack ids to these
   /// nodes.
-  std::map<uint64_t, ContextNode *> StackEntryIdToContextNodeMap;
+  DenseMap<uint64_t, ContextNode *> StackEntryIdToContextNodeMap;
 
   /// Maps to track the calls to their corresponding nodes in the graph.
   MapVector<CallInfo, ContextNode *> AllocationCallToContextNodeMap;