Use llvm.dbg.cu named metadata to collect compile units.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130756 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/SourceLevelDebugging.html b/docs/SourceLevelDebugging.html
index c9ae020..4c4439f 100644
--- a/docs/SourceLevelDebugging.html
+++ b/docs/SourceLevelDebugging.html
@@ -342,7 +342,9 @@
that produced it.</p>
<p>Compile unit descriptors provide the root context for objects declared in a
- specific compilation unit. File descriptors are defined using this context.</p>
+ specific compilation unit. File descriptors are defined using this context.
+ These descriptors are collected by a named metadata
+ <tt>!llvm.dbg.cu</tt>.
</div>
diff --git a/lib/Analysis/DIBuilder.cpp b/lib/Analysis/DIBuilder.cpp
index dc98c9e..1375e49 100644
--- a/lib/Analysis/DIBuilder.cpp
+++ b/lib/Analysis/DIBuilder.cpp
@@ -51,6 +51,10 @@
ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeVer)
};
TheCU = DICompileUnit(MDNode::get(VMContext, Elts));
+
+ // Create a named metadata so that it is easier to find cu in a module.
+ NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.cu");
+ NMD->addOperand(TheCU);
}
/// createFile - Create a file descriptor to hold debugging information