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New helper function getMBBFromIndex() that given an index in any instruction of an MBB returns a pointer the MBB. Reviewed by Evan.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47267 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Roman Levenstein 2008-02-18 09:35:30 +00:00
parent 5aa4f2a085
commit 8dd25288f9
2 changed files with 30 additions and 16 deletions
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30
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@ -40,6 +40,20 @@ namespace llvm {
class VirtRegMap;
typedef std::pair<unsigned, MachineBasicBlock*> IdxMBBPair;
inline bool operator<(unsigned V, const IdxMBBPair &IM) {
return V < IM.first;
}
inline bool operator<(const IdxMBBPair &IM, unsigned V) {
return IM.first < V;
}
struct Idx2MBBCompare {
bool operator()(const IdxMBBPair &LHS, const IdxMBBPair &RHS) const {
return LHS.first < RHS.first;
}
};
class LiveIntervals : public MachineFunctionPass {
MachineFunction* mf_;
const TargetMachine* tm_;
@ -153,6 +167,22 @@ namespace llvm {
return MBB2IdxMap[MBBNo].second;
}
/// getMBBFromIndex - given an index in any instruction of an
/// MBB return a pointer the MBB
MachineBasicBlock* getMBBFromIndex(unsigned index) const {
std::vector<IdxMBBPair>::const_iterator I =
std::lower_bound(Idx2MBBMap.begin(), Idx2MBBMap.end(), index);
// Take the pair containing the index
std::vector<IdxMBBPair>::const_iterator J =
((I != Idx2MBBMap.end() && I->first > index) ||
(I == Idx2MBBMap.end() && Idx2MBBMap.size()>0)) ? (I-1): I;
assert(J != Idx2MBBMap.end() && J->first < index+1 &&
index <= getMBBEndIdx(J->second) &&
"index does not correspond to an MBB");
return J->second;
}
/// getInstructionIndex - returns the base index of instr
unsigned getInstructionIndex(MachineInstr* instr) const {
Mi2IndexMap::const_iterator it = mi2iMap_.find(instr);

16
lib/CodeGen/LiveIntervalAnalysis.cpp
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@ -79,22 +79,6 @@ void LiveIntervals::releaseMemory() {
delete ClonedMIs[i];
}
namespace llvm {
inline bool operator<(unsigned V, const IdxMBBPair &IM) {
return V < IM.first;
}
inline bool operator<(const IdxMBBPair &IM, unsigned V) {
return IM.first < V;
}
struct Idx2MBBCompare {
bool operator()(const IdxMBBPair &LHS, const IdxMBBPair &RHS) const {
return LHS.first < RHS.first;
}
};
}
/// runOnMachineFunction - Register allocate the whole function
///
bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {