X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FTargetData.cpp;h=5bcd6583635bed8003917f59b382932603738d17;hb=762ccea600158bb317dcccdff3303e942426cb71;hp=43f0ac8a94d282f9819709513774364671b5a30c;hpb=28998d1806f5717c841c614f5c6c08fd6de4cdbb;p=oota-llvm.git

diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
index 43f0ac8a94d..5bcd6583635 100644
--- a/lib/Target/TargetData.cpp
+++ b/lib/Target/TargetData.cpp
@@ -24,6 +24,7 @@
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/ErrorHandling.h"
+#include "llvm/System/Mutex.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringExtras.h"
 #include <algorithm>
@@ -131,8 +132,6 @@ const TargetAlignElem TargetData::InvalidAlignmentElem =
 //                       TargetData Class Implementation
 //===----------------------------------------------------------------------===//
 
-typedef DenseMap<const StructType*, StructLayout*> LayoutInfoTy;
-
 /*!
  A TargetDescription string consists of a sequence of hyphen-delimited
  specifiers for target endianness, pointer size and alignments, and various
@@ -171,9 +170,9 @@ typedef DenseMap<const StructType*, StructLayout*> LayoutInfoTy;
  alignment will be used.
  */ 
 void TargetData::init(const std::string &TargetDescription) {
-  LayoutMap = static_cast<void*>(new LayoutInfoTy());
   std::string temp = TargetDescription;
   
+  LayoutMap = 0;
   LittleEndian = false;
   PointerMemSize = 8;
   PointerABIAlign   = 8;
@@ -236,28 +235,11 @@ void TargetData::init(const std::string &TargetDescription) {
   }
 }
 
-TargetData::TargetData(const std::string &TargetDescription)
-  : ImmutablePass(&ID) {
-  init(TargetDescription);
-}
-
 TargetData::TargetData(const Module *M) 
   : ImmutablePass(&ID) {
   init(M->getDataLayout());
 }
 
-TargetData::TargetData(const TargetData &TD) :
-    ImmutablePass(&ID),
-    LittleEndian(TD.isLittleEndian()),
-    PointerMemSize(TD.PointerMemSize),
-    PointerABIAlign(TD.PointerABIAlign),
-    PointerPrefAlign(TD.PointerPrefAlign),
-    Alignments(TD.Alignments) {
-  LayoutInfoTy *Other = static_cast<LayoutInfoTy*>(TD.LayoutMap);
-  LayoutMap = static_cast<void*>(new LayoutInfoTy(*Other));
-}
-
-
 void
 TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
                          unsigned char pref_align, uint32_t bit_width) {
@@ -336,11 +318,14 @@ unsigned TargetData::getAlignmentInfo(AlignTypeEnum AlignType,
                  : Alignments[BestMatchIdx].PrefAlign;
 }
 
-TargetData::~TargetData() {
-  assert(LayoutMap && "LayoutMap not initialized?");
-  LayoutInfoTy &TheMap = *static_cast<LayoutInfoTy*>(LayoutMap);
+typedef DenseMap<const StructType*, StructLayout*>LayoutInfoTy;
 
+TargetData::~TargetData() {
+  if (!LayoutMap)
+    return;
+  
   // Remove any layouts for this TD.
+  LayoutInfoTy &TheMap = *static_cast<LayoutInfoTy*>(LayoutMap);
   for (LayoutInfoTy::iterator I = TheMap.begin(), E = TheMap.end(); I != E; ) {
     I->second->~StructLayout();
     free(I->second);
@@ -348,11 +333,12 @@ TargetData::~TargetData() {
   }
   
   delete static_cast<LayoutInfoTy*>(LayoutMap);
-  LayoutMap = 0;
 }
 
 const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
-  assert(LayoutMap && "LayoutMap not initialized?");
+  if (!LayoutMap)
+    LayoutMap = static_cast<void*>(new LayoutInfoTy());
+  
   LayoutInfoTy &TheMap = *static_cast<LayoutInfoTy*>(LayoutMap);
   
   StructLayout *&SL = TheMap[Ty];
@@ -377,8 +363,9 @@ const StructLayout *TargetData::getStructLayout(const StructType *Ty) const {
 /// removed, this method must be called whenever a StructType is removed to
 /// avoid a dangling pointer in this cache.
 void TargetData::InvalidateStructLayoutInfo(const StructType *Ty) const {
-  assert(LayoutMap && "LayoutMap not initialized?");
-  LayoutInfoTy *LayoutInfo = static_cast<LayoutInfoTy*>(LayoutMap);
+  if (!LayoutMap) return;  // No cache.
+  
+  LayoutInfoTy* LayoutInfo = static_cast<LayoutInfoTy*>(LayoutMap);
   LayoutInfoTy::iterator I = LayoutInfo->find(Ty);
   if (I == LayoutInfo->end()) return;