Peter Klausler 9489699438 [flang] Fold IS_CONTIGUOUS() to .FALSE. when it is known to be ...

At present, IS_CONTIGUOUS() can only either fold to .TRUE. or
remain unknown.  The underlying analysis, however, is capable
of returning a tri-state result (true, false, or unknown).
Extend and expose it to folding so that IS_CONTIGUOUS() can
fold to .FALSE. as well as to .TRUE. when contiguity is
known.

Differential Revision: https://reviews.llvm.org/D134466

2022-09-23 14:16:26 -07:00

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