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Keep track of the start of MBB's in a separate map from instructions. This

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is faster and is needed for future improvements.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30383 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2006-09-15 03:57:23 +00:00
parent c45a2c72cc
commit 428b92eb83
2 changed files with 62 additions and 40 deletions
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19
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@ -38,6 +38,10 @@ namespace llvm {
const TargetInstrInfo* tii_;
LiveVariables* lv_;
/// MBB2IdxMap - The index of the first instruction in the specified basic
/// block.
std::vector<unsigned> MBB2IdxMap;
typedef std::map<MachineInstr*, unsigned> Mi2IndexMap;
Mi2IndexMap mi2iMap_;
@ -113,6 +117,17 @@ namespace llvm {
return I->second;
}
/// getMBBStartIdx - Return the base index of the first instruction in the
/// specified MachineBasicBlock.
unsigned getMBBStartIdx(MachineBasicBlock *MBB) const {
return getMBBStartIdx(MBB->getNumber());
}
unsigned getMBBStartIdx(unsigned MBBNo) const {
assert(MBBNo < MBB2IdxMap.size() && "Invalid MBB number!");
return MBB2IdxMap[MBBNo];
}
/// getInstructionIndex - returns the base index of instr
unsigned getInstructionIndex(MachineInstr* instr) const {
Mi2IndexMap::const_iterator it = mi2iMap_.find(instr);
@ -128,7 +143,7 @@ namespace llvm {
"index does not correspond to an instruction");
return i2miMap_[index];
}
std::vector<LiveInterval*> addIntervalsForSpills(const LiveInterval& i,
VirtRegMap& vrm,
int slot);
@ -155,7 +170,7 @@ namespace llvm {
}
}
/// computeIntervals - compute live intervals
/// computeIntervals - Compute live intervals.
void computeIntervals();
/// joinIntervals - join compatible live intervals