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Simplify findNonImmUse; return the result using the return value
instead of via a by-reference argument. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63118 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -249,30 +249,30 @@ static SDNode *findFlagUse(SDNode *N) {
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return NULL;
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}
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/// findNonImmUse - Return true by reference in "found" if "Use" is an
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/// non-immediate use of "Def". This function recursively traversing
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/// up the operand chain ignoring certain nodes.
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static void findNonImmUse(SDNode *Use, SDNode* Def, SDNode *ImmedUse,
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SDNode *Root, bool &found,
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/// findNonImmUse - Return true if "Use" is a non-immediate use of "Def".
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/// This function recursively traverses up the operand chain, ignoring
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/// certain nodes.
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static bool findNonImmUse(SDNode *Use, SDNode* Def, SDNode *ImmedUse,
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SDNode *Root,
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SmallPtrSet<SDNode*, 16> &Visited) {
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if (found ||
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Use->getNodeId() < Def->getNodeId() ||
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if (Use->getNodeId() < Def->getNodeId() ||
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!Visited.insert(Use))
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return;
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for (unsigned i = 0, e = Use->getNumOperands(); !found && i != e; ++i) {
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return false;
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for (unsigned i = 0, e = Use->getNumOperands(); i != e; ++i) {
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SDNode *N = Use->getOperand(i).getNode();
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if (N == Def) {
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if (Use == ImmedUse || Use == Root)
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continue; // We are not looking for immediate use.
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assert(N != Root);
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found = true;
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break;
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return true;
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}
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// Traverse up the operand chain.
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findNonImmUse(N, Def, ImmedUse, Root, found, Visited);
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if (findNonImmUse(N, Def, ImmedUse, Root, Visited))
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return true;
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}
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return false;
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}
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/// isNonImmUse - Start searching from Root up the DAG to check is Def can
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@ -287,9 +287,7 @@ static void findNonImmUse(SDNode *Use, SDNode* Def, SDNode *ImmedUse,
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/// its chain operand.
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static inline bool isNonImmUse(SDNode *Root, SDNode *Def, SDNode *ImmedUse) {
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SmallPtrSet<SDNode*, 16> Visited;
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bool found = false;
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findNonImmUse(Root, Def, ImmedUse, Root, found, Visited);
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return found;
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return findNonImmUse(Root, Def, ImmedUse, Root, Visited);
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}
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