Reuse DIEInteger for 1. This is frequently used while emitting an attribute using dwarf::DW_FORM_flag form.

llvm-svn: 107903

2 files changed, 5 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 775012b0531..6f2634bee71 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -322,6 +322,7 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
   DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0; 
   DwarfDebugLineSectionSym = CurrentLineSectionSym = 0;
   FunctionBeginSym = FunctionEndSym = 0;
+  DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
   {
     NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
     beginModule(M);
@@ -376,7 +377,8 @@ DIEEntry *DwarfDebug::createDIEEntry(DIE *Entry) {
 void DwarfDebug::addUInt(DIE *Die, unsigned Attribute,
                          unsigned Form, uint64_t Integer) {
   if (!Form) Form = DIEInteger::BestForm(false, Integer);
-  DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
+  DIEValue *Value = Integer == 1 ? 
+    DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
   Die->addValue(Attribute, Form, Value);
 }
 
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index d57115ae1dc..5a281c85174 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -263,6 +263,8 @@ class DwarfDebug {
   MCSymbol *DwarfDebugLocSectionSym;
   MCSymbol *DwarfDebugLineSectionSym, *CurrentLineSectionSym;
   MCSymbol *FunctionBeginSym, *FunctionEndSym;
+
+  DIEInteger *DIEIntegerOne;
 private:
   
   /// getSourceDirectoryAndFileIds - Return the directory and file ids that