tree 46d7f0ade03f045f4ef7c81866ca24f3aa7a1c5d
parent f0a7e8a8407ca508d76f077dd1f3fa4fec65051d
author Meghana Gupta <megupta@microsoft.com> 1554756678 -0700
committer Meghana Gupta <megupta@microsoft.com> 1555616638 -0700

OS#19078643: Fix constant branch folding when equal sources can be Undefined

We constant fold branches with same sources. The outcome of this folding is different when the source has a valueType of Undefined.
Previously, we checked for this case with ValueType::IsUndefined. But this check does not include valueTypes like - Undefined | Boolean, in which case we cannot constant fold.
With this fix, we handle the case where we can have a definite valueType which could be Undefined.