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Add comments describing what the loop depth values mean. Also, make a

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minor simplification to the loop depth calculation code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46511 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2008-01-29 12:12:40 +00:00
parent 97cf759b82
commit ba42d2b937
1 changed files with 9 additions and 4 deletions
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13
include/llvm/Analysis/LoopInfo.h
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@ -84,9 +84,12 @@ public:
delete SubLoops[i];
}
/// getLoopDepth - Return the nesting level of this loop. An outer-most
/// loop has depth 1, for consistency with loop depth values used for basic
/// blocks, where depth 0 is used for blocks not inside any loops.
unsigned getLoopDepth() const {
unsigned D = 0;
for (const LoopBase<BlockT> *CurLoop = this; CurLoop;
unsigned D = 1;
for (const LoopBase<BlockT> *CurLoop = ParentLoop; CurLoop;
CurLoop = CurLoop->ParentLoop)
++D;
return D;
@ -603,7 +606,8 @@ public:
return getLoopFor(BB);
}
/// getLoopDepth - Return the loop nesting level of the specified block...
/// getLoopDepth - Return the loop nesting level of the specified block. A
/// depth of 0 means the block is not inside any loop.
///
unsigned getLoopDepth(const BlockT *BB) const {
const LoopBase<BlockT> *L = getLoopFor(BB);
@ -898,7 +902,8 @@ public:
return LI->getLoopFor(BB);
}
/// getLoopDepth - Return the loop nesting level of the specified block...
/// getLoopDepth - Return the loop nesting level of the specified block. A
/// depth of 0 means the block is not inside any loop.
///
inline unsigned getLoopDepth(const BasicBlock *BB) const {
return LI->getLoopDepth(BB);