Make a provision to encode inline location in a variable. This will enable dwarf writer to easily distinguish between two instances of a inlined variable in one basic block.

llvm-svn: 135457

2 files changed, 19 insertions, 2 deletions

diff --git a/llvm/lib/Analysis/DIBuilder.cpp b/llvm/lib/Analysis/DIBuilder.cpp
index ac5eeeb4706..da5780827ab 100644
--- a/llvm/lib/Analysis/DIBuilder.cpp
+++ b/llvm/lib/Analysis/DIBuilder.cpp
@@ -626,7 +626,8 @@ DIVariable DIBuilder::createLocalVariable(unsigned Tag, DIDescriptor Scope,
     File,
     ConstantInt::get(Type::getInt32Ty(VMContext), (LineNo | (ArgNo << 24))),
     Ty,
-    ConstantInt::get(Type::getInt32Ty(VMContext), Flags)
+    ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+    Constant::getNullValue(Type::getInt32Ty(VMContext)),
   };
   MDNode *Node = MDNode::get(VMContext, Elts);
   if (AlwaysPreserve) {
@@ -661,6 +662,7 @@ DIVariable DIBuilder::createComplexVariable(unsigned Tag, DIDescriptor Scope,
   Elts.push_back(ConstantInt::get(Type::getInt32Ty(VMContext), (LineNo | (ArgNo << 24))));
   Elts.push_back(Ty);
   Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
+  Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
   Elts.append(Addr.begin(), Addr.end());
 
   return DIVariable(MDNode::get(VMContext, Elts));
diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index b42e946f2ff..8fac3fb7218 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -111,7 +111,9 @@ Function *DIDescriptor::getFunctionField(unsigned Elt) const {
 unsigned DIVariable::getNumAddrElements() const {
   if (getVersion() <= llvm::LLVMDebugVersion8)
     return DbgNode->getNumOperands()-6;
-  return DbgNode->getNumOperands()-7;
+  if (getVersion() == llvm::LLVMDebugVersion9)
+    return DbgNode->getNumOperands()-7;
+  return DbgNode->getNumOperands()-8;
 }
 
 
@@ -760,6 +762,19 @@ NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, StringRef FuncName) {
   return M.getOrInsertNamedMetadata(Name.str());
 }
 
+/// createInlinedVariable - Create a new inlined variable based on current
+/// variable.
+/// @param DV            Current Variable.
+/// @param InlinedScope  Location at current variable is inlined.
+DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
+                                       LLVMContext &VMContext) {
+  SmallVector<Value *, 16> Elts;
+  // Insert inlined scope as 7th element.
+  for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
+    i == 7 ? Elts.push_back(InlinedScope) :
+             Elts.push_back(DV->getOperand(i));
+  return DIVariable(MDNode::get(VMContext, Elts));
+}
 
 //===----------------------------------------------------------------------===//
 // DebugInfoFinder implementations.