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Add SlotIndexes::getMBBRange() to get the range of a basic block in a single

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lookup.

llvm-svn: 121893
This commit is contained in:
Jakob Stoklund Olesen 2010-12-15 20:40:22 +00:00
parent 4f6b802044
commit 1fc1f0c4a0
1 changed files with 10 additions and 6 deletions
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16
include/llvm/CodeGen/SlotIndexes.h
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@ -545,18 +545,22 @@ namespace llvm {
return nextNonNull;
}
/// Returns the first index in the given basic block.
SlotIndex getMBBStartIdx(const MachineBasicBlock *mbb) const {
/// Return the (start,end) range of the given basic block.
const std::pair<SlotIndex, SlotIndex> &
getMBBRange(const MachineBasicBlock *mbb) const {
MBB2IdxMap::const_iterator itr = mbb2IdxMap.find(mbb);
assert(itr != mbb2IdxMap.end() && "MBB not found in maps.");
return itr->second.first;
return itr->second;
}
/// Returns the first index in the given basic block.
SlotIndex getMBBStartIdx(const MachineBasicBlock *mbb) const {
return getMBBRange(mbb).first;
}
/// Returns the last index in the given basic block.
SlotIndex getMBBEndIdx(const MachineBasicBlock *mbb) const {
MBB2IdxMap::const_iterator itr = mbb2IdxMap.find(mbb);
assert(itr != mbb2IdxMap.end() && "MBB not found in maps.");
return itr->second.second;
return getMBBRange(mbb).second;
}
/// Returns the basic block which the given index falls in.