Make the StringMaps attached to MCContext use the MCContext's allocator;

reduces the number of calls to malloc().

llvm-svn: 129687

llvm/include/llvm/MC/MCContext.h

@@ -45,12 +45,18 @@ namespace llvm {
 
     const TargetAsmInfo *TAI;
 
+    /// Allocator - Allocator object used for creating machine code objects.
+    ///
+    /// We use a bump pointer allocator to avoid the need to track all allocated
+    /// objects.
+    BumpPtrAllocator Allocator;
+
     /// Symbols - Bindings of names to symbols.
-    StringMap<MCSymbol*> Symbols;
+    StringMap<MCSymbol*, BumpPtrAllocator&> Symbols;
 
     /// UsedNames - Keeps tracks of names that were used both for used declared
     /// and artificial symbols.
-    StringMap<bool> UsedNames;
+    StringMap<bool, BumpPtrAllocator&> UsedNames;
 
     /// NextUniqueID - The next ID to dole out to an unnamed assembler temporary
     /// symbol.
@@ -96,12 +102,6 @@ namespace llvm {
     /// the elements were added.
     std::vector<const MCSection *> MCLineSectionOrder;
 
-    /// Allocator - Allocator object used for creating machine code objects.
-    ///
-    /// We use a bump pointer allocator to avoid the need to track all allocated
-    /// objects.
-    BumpPtrAllocator Allocator;
-
     void *MachOUniquingMap, *ELFUniquingMap, *COFFUniquingMap;
 
     MCSymbol *CreateSymbol(StringRef Name);

llvm/lib/MC/MCContext.cpp

@@ -27,7 +27,9 @@ typedef StringMap<const MCSectionCOFF*> COFFUniqueMapTy;
 
 
 MCContext::MCContext(const MCAsmInfo &mai, const TargetAsmInfo *tai) :
-  MAI(mai), TAI(tai), NextUniqueID(0),
+  MAI(mai), TAI(tai),
+  Allocator(), Symbols(Allocator), UsedNames(Allocator),
+  NextUniqueID(0),
   CurrentDwarfLoc(0,0,0,DWARF2_FLAG_IS_STMT,0,0),
   AllowTemporaryLabels(true) {
   MachOUniquingMap = 0;