DebugInfo: provide the ability to add members to a class after it has been constructed

This is necessary to allow Clang to only emit implicit members when
there is code generated for them, rather than whenever they are ODR
used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188082 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/DebugInfo.h b/include/llvm/DebugInfo.h
index 74416db217528f77d9975594a6e4012f60d164f8..b02446abbbfdd0e4957b6a785f8d07a924664bbb 100644 (file)
--- a/include/llvm/DebugInfo.h
+++ b/include/llvm/DebugInfo.h
@@ -323,6 +323,7 @@ namespace llvm {
 
     DIArray getTypeArray() const { return getFieldAs<DIArray>(10); }
     void setTypeArray(DIArray Elements, DIArray TParams = DIArray());
+    void addMember(DISubprogram S);
     unsigned getRunTimeLang() const { return getUnsignedField(11); }
     DICompositeType getContainingType() const {
       return getFieldAs<DICompositeType>(12);

diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index fc9324949d0d960e8f0afd53fbcd0191fd5f65a7..0f7ddb5961c856d92a039455c4cdec369b71a89d 100644 (file)
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -647,6 +647,19 @@ void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
   DbgNode = N;
 }
 
+void DICompositeType::addMember(DISubprogram S) {
+  SmallVector<llvm::Value *, 16> M;
+  DIArray OrigM = getTypeArray();
+  unsigned Elements = OrigM.getNumElements();
+  if (Elements == 1 && !OrigM.getElement(0))
+    Elements = 0;
+  M.reserve(Elements + 1);
+  for (unsigned i = 0; i != Elements; ++i)
+    M.push_back(OrigM.getElement(i));
+  M.push_back(S);
+  setTypeArray(DIArray(MDNode::get(DbgNode->getContext(), M)));
+}
+
 /// \brief Set the containing type.
 void DICompositeType::setContainingType(DICompositeType ContainingType) {
   TrackingVH<MDNode> N(*this);