From: Chris Lattner <sabre@nondot.org>
Date: Fri, 30 Jan 2004 22:08:09 +0000 (+0000)
Subject: Add a new lazily constructed mapping from Idx's the MBB they represent
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=43549f710aed19431df93d893aee1ade9a33245d;p=oota-llvm.git

Add a new lazily constructed mapping from Idx's the MBB they represent


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11017 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/CodeGen/LiveVariables.h b/include/llvm/CodeGen/LiveVariables.h
index 71dd437d996..454205afbe1 100644
--- a/include/llvm/CodeGen/LiveVariables.h
+++ b/include/llvm/CodeGen/LiveVariables.h
@@ -103,6 +103,12 @@ private:   // Intermediate data structures
   /// BBMap - Maps LLVM basic blocks to their corresponding machine basic block.
   /// This also provides a numbering of the basic blocks in the function.
   std::map<const BasicBlock*, std::pair<MachineBasicBlock*, unsigned> > BBMap;
+
+
+  /// BBIdxMap - This contains the inverse mapping of BBMap, going from block ID
+  /// numbers to the corresponding MachineBasicBlock.  This is lazily computed
+  /// when the getIndexMachineBasicBlock() method is called.
+  std::vector<MachineBasicBlock*> BBIdxMap;
   
   const MRegisterInfo *RegInfo;
 
@@ -126,6 +132,9 @@ public:
     return BBMap.find(BB)->second;
   }
 
+  /// getIndexMachineBasicBlock() - Given a block index, return the
+  /// MachineBasicBlock corresponding to it.
+  MachineBasicBlock *getIndexMachineBasicBlock(unsigned Idx);
 
   /// killed_iterator - Iterate over registers killed by a machine instruction
   ///
@@ -243,6 +252,7 @@ public:
     RegistersKilled.clear();
     RegistersDead.clear();
     BBMap.clear();
+    BBIdxMap.clear();
   }
 
   /// getVarInfo - Return the VarInfo structure for the specified VIRTUAL