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add a new setNumChildren method for resizing scopes. Tweak getHash() so
that we never return a tombstone value, which (thankfully) triggers an assert in densemap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97214 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -100,7 +100,8 @@ public:
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}
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unsigned getHash() const {
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return (getHashImpl() << 4) ^ getKind();
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// Clear the high bit so we don't conflict with tombstones etc.
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return ((getHashImpl() << 4) ^ getKind()) & (~0U>>1);
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}
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void print(raw_ostream &OS, unsigned indent = 0) const;
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@ -137,6 +138,15 @@ public:
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Children[i] = 0;
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return Res;
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}
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void setNumChildren(unsigned NC) {
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if (NC < Children.size()) {
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// delete any children we're about to lose pointers to.
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for (unsigned i = NC, e = Children.size(); i != e; ++i)
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delete Children[i];
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}
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Children.resize(NC);
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}
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static inline bool classof(const Matcher *N) {
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return N->getKind() == Scope;
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