* Added SDNode::isOnlyUse().
* Fix hasNUsesOfValue(), it should be const.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25990 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index a8cd865..8c08378 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2177,7 +2177,7 @@
/// hasNUsesOfValue - Return true if there are exactly NUSES uses of the
/// indicated value. This method ignores uses of other values defined by this
/// operation.
-bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) {
+bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) const {
assert(Value < getNumValues() && "Bad value!");
// If there is only one value, this is easy.
@@ -2185,11 +2185,11 @@
return use_size() == NUses;
if (Uses.size() < NUses) return false;
- SDOperand TheValue(this, Value);
+ SDOperand TheValue(const_cast<SDNode *>(this), Value);
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) {
SDNode *User = *UI;
if (User->getNumOperands() == 1 ||
@@ -2207,6 +2207,21 @@
}
+// 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 {
switch (getOpcode()) {
default: