If dbg.declare from non-entry block is using alloca from entry block then use offset...

[oota-llvm.git] / lib / CodeGen / SelectionDAG / SelectionDAGBuilder.h

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index 86216375a5e2c551044298c2eaed76ba6f6a7f76..5f400e9c83acbac8908691fe1d0aac3552541ebf 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -18,9 +18,6 @@
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/DenseMap.h"
-#ifndef NDEBUG
-#include "llvm/ADT/SmallSet.h"
-#endif
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/CodeGen/ValueTypes.h"
 #include "llvm/Support/CallSite.h"
@@ -64,6 +61,7 @@ class PHINode;
 class PtrToIntInst;
 class ReturnInst;
 class SDISelAsmOperandInfo;
+class SDDbgValue;
 class SExtInst;
 class SelectInst;
 class ShuffleVectorInst;
@@ -93,6 +91,24 @@ class SelectionDAGBuilder {
   /// to preserve debug information for incoming arguments.
   DenseMap<const Value*, SDValue> UnusedArgNodeMap;
 
+  /// DanglingDebugInfo - Helper type for DanglingDebugInfoMap.
+  class DanglingDebugInfo {
+    const DbgValueInst* DI;
+    DebugLoc dl;
+    unsigned SDNodeOrder;
+  public:
+    DanglingDebugInfo() : DI(0), dl(DebugLoc()), SDNodeOrder(0) { }
+    DanglingDebugInfo(const DbgValueInst *di, DebugLoc DL, unsigned SDNO) :
+      DI(di), dl(DL), SDNodeOrder(SDNO) { }
+    const DbgValueInst* getDI() { return DI; }
+    DebugLoc getdl() { return dl; }
+    unsigned getSDNodeOrder() { return SDNodeOrder; }
+  };
+
+  /// DanglingDebugInfoMap - Keeps track of dbg_values for which we have not
+  /// yet seen the referent.  We defer handling these until we do see it.
+  DenseMap<const Value*, DanglingDebugInfo> DanglingDebugInfoMap;
+
 public:
   /// PendingLoads - Loads are not emitted to the program immediately.  We bunch
   /// them up and then emit token factor nodes when possible.  This allows us to
@@ -345,6 +361,9 @@ public:
 
   void visit(unsigned Opcode, const User &I);
 
+  // resolveDanglingDebugInfo - if we saw an earlier dbg_value referring to V,
+  // generate the debug data structures now that we've seen its definition.
+  void resolveDanglingDebugInfo(const Value *V, SDValue Val);
   SDValue getValue(const Value *V);
   SDValue getNonRegisterValue(const Value *V);
   SDValue getValueImpl(const Value *V);
@@ -385,7 +404,7 @@ private:
   void visitBr(const BranchInst &I);
   void visitSwitch(const SwitchInst &I);
   void visitIndirectBr(const IndirectBrInst &I);
-  void visitUnreachable(const UnreachableInst &I);
+  void visitUnreachable(const UnreachableInst &I) { /* noop */ }
 
   // Helpers for visitSwitch
   bool handleSmallSwitchRange(CaseRec& CR,
@@ -506,13 +525,11 @@ private:
 
   void HandlePHINodesInSuccessorBlocks(const BasicBlock *LLVMBB);
 
-  /// EmitFuncArgumentDbgValue - If the DbgValueInst is a dbg_value of a
-  /// function argument, create the corresponding DBG_VALUE machine instruction
-  /// for it now. At the end of instruction selection, they will be inserted to
-  /// the entry BB.
-  bool EmitFuncArgumentDbgValue(const DbgValueInst &DI,
-                                const Value *V, MDNode *Variable,
-                                uint64_t Offset, const SDValue &N);
+  /// EmitFuncArgumentDbgValue - If V is an function argument then create
+  /// corresponding DBG_VALUE machine instruction for it now. At the end of 
+  /// instruction selection, they will be inserted to the entry BB.
+  bool EmitFuncArgumentDbgValue(const Value *V, MDNode *Variable,
+                                int64_t Offset, const SDValue &N);
 };
 
 } // end namespace llvm