[llvm] 74cc7fd - [MC] Use DenseMap for ConstantPool::CachedEntries. NFC. (#208728)

[via llvm-commits]

Author: Jay Foad
Date: 2026-07-10T17:16:10+01:00
New Revision: 74cc7fdcc850416b5760b8245c6f80e468220732

URL: https://github.com/llvm/llvm-project/commit/74cc7fdcc850416b5760b8245c6f80e468220732
DIFF: https://github.com/llvm/llvm-project/commit/74cc7fdcc850416b5760b8245c6f80e468220732.diff

LOG: [MC] Use DenseMap for ConstantPool::CachedEntries. NFC. (#208728)

This is mostly just a revert of:
3d0f9507d5e3 "[MC] Fix constant pools with DenseMap sentinel values"
although the key type has changed in the mean time. DenseMap no longer
uses sentinels so the reasons for avoiding it no longer apply.

Added: 
    

Modified: 
    llvm/include/llvm/MC/ConstantPools.h

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/MC/ConstantPools.h b/llvm/include/llvm/MC/ConstantPools.h
index 2ce9cb25fd5be..43e17e9a2cd35 100644
--- a/llvm/include/llvm/MC/ConstantPools.h
+++ b/llvm/include/llvm/MC/ConstantPools.h
@@ -17,7 +17,6 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/SMLoc.h"
 #include <cstdint>
-#include <map>
 
 namespace llvm {
 
@@ -46,7 +45,7 @@ class ConstantPool {
 
   // Caches of entries that already exist, indexed by their contents
   // and also the size of the constant.
-  std::map<std::pair<int64_t, unsigned>, const MCSymbolRefExpr *>
+  DenseMap<std::pair<int64_t, unsigned>, const MCSymbolRefExpr *>
       CachedConstantEntries;
   DenseMap<std::pair<const MCSymbol *, unsigned>, const MCSymbolRefExpr *>
       CachedSymbolEntries;