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Add comment to the definition of Constant::isZeroValue().
(There already has a concise comment to the declaration.) Thank Eric Christopher for his feedback! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171926 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -51,6 +51,8 @@ bool Constant::isNegativeZeroValue() const {
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return isNullValue();
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}
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// Return true iff this constant is positive zero (floating point), negative
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// zero (floating point), or a null value.
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bool Constant::isZeroValue() const {
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// Floating point values have an explicit -0.0 value.
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if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))
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