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* Added SDNode::isOnlyUse().

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* Fix hasNUsesOfValue(), it should be const.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25990 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-02-05 06:29:23 +00:00
parent 35409221bc
commit 4ee6211258
2 changed files with 22 additions and 4 deletions
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5
include/llvm/CodeGen/SelectionDAGNodes.h
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@ -619,7 +619,10 @@ public:
/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the /// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
/// indicated value. This method ignores uses of other values defined by this /// indicated value. This method ignores uses of other values defined by this
/// operation. /// operation.
bool hasNUsesOfValue(unsigned NUses, unsigned Value); bool hasNUsesOfValue(unsigned NUses, unsigned Value) const;
// isOnlyUse - Return true if this node is the only use of N.
bool isOnlyUse(SDNode *N) const;
/// getNumOperands - Return the number of values used by this operation. /// getNumOperands - Return the number of values used by this operation.
/// ///

21
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -2177,7 +2177,7 @@ MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) {
/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the /// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
/// indicated value. This method ignores uses of other values defined by this /// indicated value. This method ignores uses of other values defined by this
/// operation. /// operation.
bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) { bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const {
assert(Value < getNumValues() && "Bad value!"); assert(Value < getNumValues() && "Bad value!");
// If there is only one value, this is easy. // If there is only one value, this is easy.
@ -2185,11 +2185,11 @@ bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) {
return use_size() == NUses; return use_size() == NUses;
if (Uses.size() < NUses) return false; if (Uses.size() < NUses) return false;
SDOperand TheValue(this, Value); SDOperand TheValue(const_cast<SDNode *>(this), Value);
std::set<SDNode*> UsersHandled; std::set<SDNode*> UsersHandled;
for (std::vector<SDNode*>::iterator UI = Uses.begin(), E = Uses.end(); for (std::vector<SDNode*>::const_iterator UI = Uses.begin(), E = Uses.end();
UI != E; ++UI) { UI != E; ++UI) {
SDNode *User = *UI; SDNode *User = *UI;
if (User->getNumOperands() == 1 || if (User->getNumOperands() == 1 ||
@ -2207,6 +2207,21 @@ bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) {
} }
// isOnlyUse - Return true if this node is the only use of N.
bool SDNode::isOnlyUse(SDNode *N) const {
bool Seen = false;
for (SDNode::use_iterator I = N->use_begin(), E = N->use_end(); I != E; ++I) {
SDNode *User = *I;
if (User == this)
Seen = true;
else
return false;
}
return Seen;
}
const char *SDNode::getOperationName(const SelectionDAG *G) const { const char *SDNode::getOperationName(const SelectionDAG *G) const {
switch (getOpcode()) { switch (getOpcode()) {
default: default: