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Fix bug: TailDup/2003-07-22-InfiniteLoop.ll

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@7243 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-07-23 03:32:41 +00:00
parent e1a875ef29
commit 00f185fbfd
1 changed files with 5 additions and 0 deletions
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5
lib/Transforms/Scalar/TailDuplication.cpp
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@ -76,6 +76,11 @@ bool TailDup::shouldEliminateUnconditionalBranch(TerminatorInst *TI) {
BasicBlock *Dest = BI->getSuccessor(0); BasicBlock *Dest = BI->getSuccessor(0);
if (Dest == BI->getParent()) return false; // Do not loop infinitely! if (Dest == BI->getParent()) return false; // Do not loop infinitely!
// Do not inline a block if we will just get another branch to the same block!
if (BranchInst *DBI = dyn_cast<BranchInst>(Dest->getTerminator()))
if (DBI->isUnconditional() && DBI->getSuccessor(0) == Dest)
return false; // Do not loop infinitely!
// Do not bother working on dead blocks... // Do not bother working on dead blocks...
pred_iterator PI = pred_begin(Dest), PE = pred_end(Dest); pred_iterator PI = pred_begin(Dest), PE = pred_end(Dest);
if (PI == PE && Dest != Dest->getParent()->begin()) if (PI == PE && Dest != Dest->getParent()->begin())