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Minor bug in SCCP found by inspection. (I don't think it's possible to hit this with a normal pass pipeline, but fixing for completeness.)

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137755 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2011-08-16 21:12:35 +00:00
parent c2408d3ce5
commit 1fc291f0d3
2 changed files with 20 additions and 0 deletions
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lib/Transforms/Scalar/SCCP.cpp
+7
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@@ -582,6 +582,10 @@ void SCCPSolver::getFeasibleSuccessors(TerminatorInst &TI,
}
if (SwitchInst *SI = dyn_cast<SwitchInst>(&TI)) {
if (TI.getNumSuccessors() < 2) {
Succs[0] = true;
return;
}
LatticeVal SCValue = getValueState(SI->getCondition());
ConstantInt *CI = SCValue.getConstantInt();
@@ -642,6 +646,9 @@ bool SCCPSolver::isEdgeFeasible(BasicBlock *From, BasicBlock *To) {
return true;
if (SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {
if (SI->getNumSuccessors() < 2)
return true;
LatticeVal SCValue = getValueState(SI->getCondition());
ConstantInt *CI = SCValue.getConstantInt();