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Neaten up this method. Check that if there is only one

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predecessor then it's Src.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149843 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2012-02-05 19:43:37 +00:00
parent 23f612113a
commit c4fd448712
1 changed files with 3 additions and 3 deletions
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6
lib/Transforms/Scalar/GVN.cpp
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@ -1999,10 +1999,10 @@ static bool isOnlyReachableViaThisEdge(BasicBlock *Src, BasicBlock *Dst,
// only reachable from Src, in practice it is pointless since at the time
// GVN runs all such loops have preheaders, which means that Dst will have
// been changed to have only one predecessor, namely Src.
pred_iterator PI = pred_begin(Dst), PE = pred_end(Dst);
assert(PI != PE && "No edge between these basic blocks!");
BasicBlock *Pred = Dst->getSinglePredecessor();
assert((!Pred || Pred == Src) && "No edge between these basic blocks!");
(void)Src;
return PE == ++PI;
return Pred != 0;
}
/// processInstruction - When calculating availability, handle an instruction