Add support to preserve type info for the variables that are removed by the optimizer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103798 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index 92f91f4..194811b 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -1028,7 +1028,7 @@
StringRef Name,
DIFile F,
unsigned LineNo,
- DIType Ty) {
+ DIType Ty, bool OptimizedBuild) {
Value *Elts[] = {
GetTagConstant(Tag),
Context,
@@ -1037,7 +1037,12 @@
ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
Ty,
};
- return DIVariable(MDNode::get(VMContext, &Elts[0], 6));
+ MDNode *Node = MDNode::get(VMContext, &Elts[0], 6);
+ if (OptimizedBuild) {
+ NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.lv");
+ NMD->addOperand(Node);
+ }
+ return DIVariable(Node);
}