If location info is attached with an instruction then keep track of alloca slots used by a variable. This info will be used by AsmPrinter to emit debug info for variables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83189 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/MachineModuleInfo.h b/include/llvm/CodeGen/MachineModuleInfo.h
index 6707ab119c..b7b90198b1 100644
--- a/include/llvm/CodeGen/MachineModuleInfo.h
+++ b/include/llvm/CodeGen/MachineModuleInfo.h
@@ -48,6 +48,7 @@ namespace llvm {
 //===----------------------------------------------------------------------===//
 // Forward declarations.
 class Constant;
+class MDNode;
 class GlobalVariable;
 class MachineBasicBlock;
 class MachineFunction;
@@ -142,9 +143,13 @@ class MachineModuleInfo : public ImmutablePass {
   /// DbgInfoAvailable - True if debugging information is available
   /// in this module.
   bool DbgInfoAvailable;
+
 public:
   static char ID; // Pass identification, replacement for typeid
 
+  typedef DenseMap<MDNode *, std::pair<MDNode *, unsigned> > VariableDbgInfoMapTy;
+  VariableDbgInfoMapTy VariableDbgInfo;
+
   MachineModuleInfo();
   ~MachineModuleInfo();
   
@@ -325,6 +330,15 @@ public:
   /// of one is required to emit exception handling info.
   Function *getPersonality() const;
 
+  /// setVariableDbgInfo - Collect information used to emit debugging information
+  /// of a variable.
+  void setVariableDbgInfo(MDNode *N, MDNode *L, unsigned S) {
+    if (N && L)
+      VariableDbgInfo[N] = std::make_pair(L, S);
+  }
+
+  VariableDbgInfoMapTy &getVariableDbgInfo() {  return VariableDbgInfo;  }
+
 }; // End class MachineModuleInfo
 
 } // End llvm namespace