[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

[Evan Cheng]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

SelectionDAG.cpp updated: 1.253 -> 1.254
---
Log message:

* Added SDNode::isOnlyUse().
* Fix hasNUsesOfValue(), it should be const.


---
Diffs of the changes:  (+18 -3)

 SelectionDAG.cpp |   21 ++++++++++++++++++---
 1 files changed, 18 insertions(+), 3 deletions(-)


Index: llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.253 llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.254
--- llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:1.253	Fri Feb  3 00:51:34 2006
+++ llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp	Sun Feb  5 00:29:23 2006
@@ -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: