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It's safe to sink some instructions which are not safe to speculatively

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execute. Make Sink's predicate more precise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118787 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-11-11 16:20:28 +00:00
parent e7ae70b137
commit 2c71f18ff7
1 changed files with 4 additions and 1 deletions
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5
lib/Transforms/Scalar/Sink.cpp
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@@ -169,7 +169,10 @@ static bool isSafeToMove(Instruction *Inst, AliasAnalysis *AA,
return false; return false;
} }
return Inst->isSafeToSpeculativelyExecute(); if (isa<TerminatorInst>(Inst) || isa<PHINode>(Inst))
return false;
return true;
} }
/// SinkInstruction - Determine whether it is safe to sink the specified machine /// SinkInstruction - Determine whether it is safe to sink the specified machine