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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11017 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-30 22:08:09 +00:00
parent 09caa3751f
commit 43549f710a
1 changed files with 10 additions and 0 deletions
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10
include/llvm/CodeGen/LiveVariables.h
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@ -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