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Add a utility function to SDOperand for testing if a value is unused.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42038 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2007-09-17 17:44:31 +00:00
parent 7d6ff3a25d
commit e1b50639a8
1 changed files with 7 additions and 0 deletions
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7
include/llvm/CodeGen/SelectionDAGNodes.h
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@@ -766,6 +766,10 @@ public:
/// hasOneUse - Return true if there is exactly one operation using this /// hasOneUse - Return true if there is exactly one operation using this
/// result value of the defining operator. /// result value of the defining operator.
inline bool hasOneUse() const; inline bool hasOneUse() const;
/// use_empty - Return true if there are no operations using this
/// result value of the defining operator.
inline bool use_empty() const;
}; };
@@ -1035,6 +1039,9 @@ inline unsigned SDOperand::getTargetOpcode() const {
inline bool SDOperand::hasOneUse() const { inline bool SDOperand::hasOneUse() const {
return Val->hasNUsesOfValue(1, ResNo); return Val->hasNUsesOfValue(1, ResNo);
} }
inline bool SDOperand::use_empty() const {
return !Val->hasAnyUseOfValue(ResNo);
}
/// UnarySDNode - This class is used for single-operand SDNodes. This is solely /// UnarySDNode - This class is used for single-operand SDNodes. This is solely
/// to allow co-allocation of node operands with the node itself. /// to allow co-allocation of node operands with the node itself.