From 4ee621125876cc954cba5280dd9395552755a871 Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Sun, 5 Feb 2006 06:29:23 +0000 Subject: * 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 --- lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) (limited to 'lib') 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 @@ MVT::ValueType *SDNode::getValueTypeList(MVT::ValueType VT) { /// 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 @@ bool SDNode::hasNUsesOfValue(unsigned NUses, unsigned Value) { return use_size() == NUses; if (Uses.size() < NUses) return false; - SDOperand TheValue(this, Value); + SDOperand TheValue(const_cast(this), Value); std::set UsersHandled; - for (std::vector::iterator UI = Uses.begin(), E = Uses.end(); + for (std::vector::const_iterator UI = Uses.begin(), E = Uses.end(); UI != E; ++UI) { SDNode *User = *UI; 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 { switch (getOpcode()) { default: -- cgit v1.1