Fix comments.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31414 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index fe33ff5..4c21eff 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -2534,7 +2534,8 @@
}
-// isOnlyUse - Return true if this node is the only use of N.
+/// 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) {
@@ -2548,7 +2549,8 @@
return Seen;
}
-// isOperand - Return true if this node is an operand of N.
+/// isOperand - Return true if this node is an operand of N.
+///
bool SDOperand::isOperand(SDNode *N) const {
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i)
if (*this == N->getOperand(i))
@@ -2578,7 +2580,10 @@
}
}
-// isPredecessor - Return true if this node is a predecessor of N.
+/// isPredecessor - Return true if this node is a predecessor of N. This node
+/// is either an operand of N or it can be reached by recursively traversing
+/// up the operands.
+/// NOTE: this is an expensive method. Use it carefully.
bool SDNode::isPredecessor(SDNode *N) const {
std::set<SDNode *> Visited;
bool found = false;