Use separate named MDNode to hold each function's local variable info.
This speeds up local variable handling in DwarfDebug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106075 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index 774dce0..6ef160b 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -1053,8 +1053,12 @@
// The optimizer may remove local variable. If there is an interest
// to preserve variable info in such situation then stash it in a
// named mdnode.
- NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.lv");
- NMD->addOperand(Node);
+ DISubprogram Fn(getDISubprogram(Context));
+ const Twine FnLVName = Twine("llvm.dbg.lv.", Fn.getName());
+ NamedMDNode *FnLocals = M.getNamedMetadataUsingTwine(FnLVName);
+ if (!FnLocals)
+ FnLocals = NamedMDNode::Create(VMContext, FnLVName, NULL, 0, &M);
+ FnLocals->addOperand(Node);
}
return DIVariable(Node);
}