Revert "Reapply 91184 with fixes and an addition to the testcase to cover the

[oota-llvm.git] / lib / CodeGen / MachineModuleInfo.cpp

diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index 8661b9ee132bdaf4c8bca4f0021143b47487faca..ed5bb5e5410c3d583552974095ac79096791cbb1 100644 (file)
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -76,6 +76,7 @@ void MachineModuleInfo::EndFunction() {
   FilterEnds.clear();
   CallsEHReturn = 0;
   CallsUnwindInit = 0;
+  VariableDbgInfo.clear();
 }
 
 /// AnalyzeModule - Scan the module for global debug information.
@@ -292,75 +293,3 @@ unsigned MachineModuleInfo::getPersonalityIndex() const {
   return 0;
 }
 
-//===----------------------------------------------------------------------===//
-/// DebugLabelFolding pass - This pass prunes out redundant labels.  This allows
-/// a info consumer to determine if the range of two labels is empty, by seeing
-/// if the labels map to the same reduced label.
-
-namespace llvm {
-
-struct DebugLabelFolder : public MachineFunctionPass {
-  static char ID;
-  DebugLabelFolder() : MachineFunctionPass(&ID) {}
-
-  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-    AU.setPreservesCFG();
-    AU.addPreservedID(MachineLoopInfoID);
-    AU.addPreservedID(MachineDominatorsID);
-    MachineFunctionPass::getAnalysisUsage(AU);
-  }
-
-  virtual bool runOnMachineFunction(MachineFunction &MF);
-  virtual const char *getPassName() const { return "Label Folder"; }
-};
-
-char DebugLabelFolder::ID = 0;
-
-bool DebugLabelFolder::runOnMachineFunction(MachineFunction &MF) {
-  // Get machine module info.
-  MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
-  if (!MMI) return false;
-
-  // Track if change is made.
-  bool MadeChange = false;
-  // No prior label to begin.
-  unsigned PriorLabel = 0;
-
-  // Iterate through basic blocks.
-  for (MachineFunction::iterator BB = MF.begin(), E = MF.end();
-       BB != E; ++BB) {
-    // Iterate through instructions.
-    for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ) {
-      // Is it a label.
-      if (I->isDebugLabel() && !MMI->isDbgLabelUsed(I->getOperand(0).getImm())){
-        // The label ID # is always operand #0, an immediate.
-        unsigned NextLabel = I->getOperand(0).getImm();
-
-        // If there was an immediate prior label.
-        if (PriorLabel) {
-          // Remap the current label to prior label.
-          MMI->RemapLabel(NextLabel, PriorLabel);
-          // Delete the current label.
-          I = BB->erase(I);
-          // Indicate a change has been made.
-          MadeChange = true;
-          continue;
-        } else {
-          // Start a new round.
-          PriorLabel = NextLabel;
-        }
-       } else {
-        // No consecutive labels.
-        PriorLabel = 0;
-      }
-
-      ++I;
-    }
-  }
-
-  return MadeChange;
-}
-
-FunctionPass *createDebugLabelFoldingPass() { return new DebugLabelFolder(); }
-
-}