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Add comment to the definition of Constant::isZeroValue().

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(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
This commit is contained in:
Shuxin Yang 2013-01-09 00:53:25 +00:00
parent 8456efb38e
commit c3d6de2fe5
1 changed files with 2 additions and 0 deletions
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2
lib/IR/Constants.cpp
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@ -51,6 +51,8 @@ bool Constant::isNegativeZeroValue() const {
return isNullValue();
}
// Return true iff this constant is positive zero (floating point), negative
// zero (floating point), or a null value.
bool Constant::isZeroValue() const {
// Floating point values have an explicit -0.0 value.
if (const ConstantFP *CFP = dyn_cast<ConstantFP>(this))