Ignore ConstantExpr in IgnoreParens
Summary:
This moves it up from IgnoreParenImpCasts to IgnoreParens, so that more
helpers ignore it. For most clients, this ensures that these helpers
behave the same with and without C++17 enabled, which is what appears to
introduce these new expression nodes.
Fixes PR39881
Reviewers: void, rsmith
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D55853
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@350068
91177308-0d34-0410-b5e6-
96231b3b80d8