Update copy operator for AddrSpaceToSentinelValueMap and sentinelValueDefined

Author: ranapratap55

llvm/include/llvm/IR/DataLayout.h

@@ -166,6 +166,7 @@ class DataLayout {
   SmallVector<unsigned, 8> NonIntegralAddressSpaces;
 
   DenseMap<unsigned, int64_t> AddrSpaceToSentinelValueMap;
+  bool sentinelValueDefined = false;
 
   /// Attempts to set the alignment of the given type. Returns an error
   /// description on failure.
@@ -222,6 +223,8 @@ class DataLayout {
     StructAlignment = DL.StructAlignment;
     Pointers = DL.Pointers;
     NonIntegralAddressSpaces = DL.NonIntegralAddressSpaces;
+    AddrSpaceToSentinelValueMap = DL.AddrSpaceToSentinelValueMap;
+    sentinelValueDefined = DL.isSentinelValueDefined();
     return *this;
   }
 
@@ -302,7 +305,7 @@ class DataLayout {
     return ManglingMode == MM_WinCOFFX86;
   }
 
-  int64_t getSentinelPointerValue(unsigned AddrSpace) {
+  int64_t getSentinelPointerValue(unsigned AddrSpace) const {
     auto It = AddrSpaceToSentinelValueMap.find(AddrSpace);
     if (It == AddrSpaceToSentinelValueMap.end())
       return 0;
@@ -313,6 +316,8 @@ class DataLayout {
     AddrSpaceToSentinelValueMap[AddrSpace] = Value;
   }
 
+  bool isSentinelValueDefined() const { return sentinelValueDefined; }
+
   /// Returns true if symbols with leading question marks should not receive IR
   /// mangling. True for Windows mangling modes.
   bool doNotMangleLeadingQuestionMark() const {

llvm/lib/IR/DataLayout.cpp

@@ -521,6 +521,7 @@ Error DataLayout::parseSpecifier(StringRef Desc) {
       break;
     }
     case 'z': {
+      sentinelValueDefined = true;
       unsigned AddrSpace = 0;
       int64_t Value;
       // for unlisted address spaces e.g., z:0
@@ -748,6 +749,7 @@ class StructLayoutMap {
 } // end anonymous namespace
 
 void DataLayout::clear() {
+
   LegalIntWidths.clear();
   IntAlignments.clear();
   FloatAlignments.clear();