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Disable tail duplication in a case that breaks on Olden/tsp

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12021 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-03-01 01:12:13 +00:00
parent 201ff603a7
commit 99cca7d3aa
2 changed files with 5 additions and 1 deletions
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4
lib/Transforms/Scalar/TailDuplication.cpp
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@@ -135,6 +135,10 @@ bool TailDup::canEliminateUnconditionalBranch(TerminatorInst *TI) {
Instruction *User = cast<Instruction>(*UI); Instruction *User = cast<Instruction>(*UI);
if (User->getParent() != Tail && User->getParent() != BB) if (User->getParent() != Tail && User->getParent() != BB)
return false; return false;
// The 'swap' problem foils the tail duplication rewriting code.
if (isa<PHINode>(User) && User->getParent() == Tail)
return false;
} }
return true; return true;
} }