Add replaceAllUsesWith() to FE replace debug info constructs while building complex types.

llvm-svn: 76765

2 files changed, 17 insertions, 0 deletions

diff --git a/llvm/include/llvm/Analysis/DebugInfo.h b/llvm/include/llvm/Analysis/DebugInfo.h
index 91046c2c866..39fe01d3428 100644
--- a/llvm/include/llvm/Analysis/DebugInfo.h
+++ b/llvm/include/llvm/Analysis/DebugInfo.h
@@ -253,6 +253,11 @@ namespace llvm {
     uint64_t getOriginalTypeSize() const;
     /// dump - print derived type.
     void dump() const;
+
+    /// replaceAllUsesWith - Replace all uses of debug info referenced by
+    /// this descriptor. After this completes, the current debug info value
+    /// is erased.
+    void replaceAllUsesWith(DIDescriptor &D);
   };
 
   /// DICompositeType - This descriptor holds a type that can refer to multiple
diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index 437ff03b327..aa012ef8bcb 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -206,6 +206,18 @@ unsigned DIArray::getNumElements() const {
   return C->getNumOperands();
 }
 
+/// replaceAllUsesWith - Replace all uses of debug info referenced by
+/// this descriptor. After this completes, the current debug info value
+/// is erased.
+void DIDerivedType::replaceAllUsesWith(DIDescriptor &D) {
+  if (isNull())
+    return;
+
+  assert (D.isNull() && "Can not replace with null");
+  getGV()->replaceAllUsesWith(D.getGV());
+  getGV()->eraseFromParent();
+}
+
 /// Verify - Verify that a compile unit is well formed.
 bool DICompileUnit::Verify() const {
   if (isNull())