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Fix a case where we incorrectly returned hasComputableLoopEvolution for
a ternary commutative expr. Remove FIXME that does not need to be fixed (can't happen). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20335 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -197,10 +197,18 @@ namespace llvm {
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return true;
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}
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// hasComputableLoopEvolution - Commutative expressions have computable loop
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// evolutions iff they have at least one operand that varies with the loop,
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// but that all varying operands are computable.
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virtual bool hasComputableLoopEvolution(const Loop *L) const {
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bool HasVarying = false;
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for (unsigned i = 0, e = getNumOperands(); i != e; ++i)
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if (getOperand(i)->hasComputableLoopEvolution(L)) return true;
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return false;
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if (!getOperand(i)->isLoopInvariant(L))
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if (getOperand(i)->hasComputableLoopEvolution(L))
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HasVarying = true;
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else
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return false;
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return HasVarying;
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}
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SCEVHandle replaceSymbolicValuesWithConcrete(const SCEVHandle &Sym,
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@ -382,8 +390,6 @@ namespace llvm {
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virtual bool hasComputableLoopEvolution(const Loop *QL) const {
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if (L == QL) return true;
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/// FIXME: What if the start or step value a recurrence for the specified
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/// loop?
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return false;
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}
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