[llvm] r265520 - IR: Move MDStrings to a BumpPtrAllocator

[Duncan P. N. Exon Smith via llvm-commits]

Author: dexonsmith
Date: Wed Apr  6 01:41:54 2016
New Revision: 265520

URL: http://llvm.org/viewvc/llvm-project?rev=265520&view=rev
Log:
IR: Move MDStrings to a BumpPtrAllocator

We never delete any MDString until the context is destroyed.  Might as
well throw them onto a BumpPtrAllocator.

Modified:
    llvm/trunk/lib/IR/LLVMContextImpl.h

Modified: llvm/trunk/lib/IR/LLVMContextImpl.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/IR/LLVMContextImpl.h?rev=265520&r1=265519&r2=265520&view=diff
==============================================================================
--- llvm/trunk/lib/IR/LLVMContextImpl.h (original)
+++ llvm/trunk/lib/IR/LLVMContextImpl.h Wed Apr  6 01:41:54 2016
@@ -931,7 +931,7 @@ public:
   FoldingSet<AttributeSetImpl> AttrsLists;
   FoldingSet<AttributeSetNode> AttrsSetNodes;
 
-  StringMap<MDString> MDStringCache;
+  StringMap<MDString, BumpPtrAllocator> MDStringCache;
   DenseMap<Value *, ValueAsMetadata *> ValuesAsMetadata;
   DenseMap<Metadata *, MetadataAsValue *> MetadataAsValues;