DebugInfo: Move DIExpression bit-piece API to MDExpression

[oota-llvm.git] / lib / IR / DebugInfoMetadata.cpp

diff --git a/lib/IR/DebugInfoMetadata.cpp b/lib/IR/DebugInfoMetadata.cpp
index 190a31d55512651e2516adaa43ac08f1613849c3..6ce091f54d1731d6b55672d58b36e4ab289e50fa 100644 (file)
--- a/lib/IR/DebugInfoMetadata.cpp
+++ b/lib/IR/DebugInfoMetadata.cpp
@@ -445,6 +445,24 @@ bool MDExpression::isValid() const {
   return true;
 }
 
+bool MDExpression::isBitPiece() const {
+  assert(isValid() && "Expected valid expression");
+  if (unsigned N = getNumElements())
+    if (N >= 3)
+      return getElement(N - 3) == dwarf::DW_OP_bit_piece;
+  return false;
+}
+
+uint64_t MDExpression::getBitPieceOffset() const {
+  assert(isBitPiece() && "Expected bit piece");
+  return getElement(getNumElements() - 2);
+}
+
+uint64_t MDExpression::getBitPieceSize() const {
+  assert(isBitPiece() && "Expected bit piece");
+  return getElement(getNumElements() - 1);
+}
+
 MDObjCProperty *MDObjCProperty::getImpl(
     LLVMContext &Context, MDString *Name, Metadata *File, unsigned Line,
     MDString *GetterName, MDString *SetterName, unsigned Attributes,