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
diff --git a/lib/IR/Constants.cpp b/lib/IR/Constants.cpp
index 812692f..9327554 100644
--- a/lib/IR/Constants.cpp
+++ b/lib/IR/Constants.cpp
@@ -51,6 +51,8 @@
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))