The syntax of the linear clause that specifies its argument and
linear-modifier as linear-modifier(list) was deprecated since OpenMP 5.2
and the step modifier was added for specifying the linear step.
Reference: OpenMP 5.2 Spec, Page 627, Line 15
Summary:
omp.h header file defines omp_null_allocator as a predefined allocator,
need to consider it also as a predefined allocator.
Reviewers: jdoerfert
Subscribers: jholewinski, yaxunl, guansong, cfe-commits, caomhin
Tags: #clang
Differential Revision: https://reviews.llvm.org/D79186
