1. Sema: add support for `__attribute__((__swift_objc_members__))` (details)
  2. [InstSimplify] add folds for fmin/fmax with 'nnan' (details)
  3. [flang] Correctly detect overlapping integer cases (details)
Commit 916b43403588a85425bbc82712427cf53ed877cc by Saleem Abdulrasool
Sema: add support for `__attribute__((__swift_objc_members__))`

This adds the `__swift_objc_members__` attribute to the semantic
analysis.  It allows for annotating ObjC interfaces to provide Swift
semantics indicating that the types derived from this interface will be
back-bridged to Objective-C to allow interoperability with Objective-C
and Swift.

This is based on the work of the original changes in

Differential Revision:
Reviewed By: Aaron Ballman, Dmitri Gribenko
The file was modifiedclang/test/Misc/pragma-attribute-supported-attributes-list.test (diff)
The file was modifiedclang/include/clang/Basic/ (diff)
The file was modifiedclang/lib/Sema/SemaDeclAttr.cpp (diff)
The file was addedclang/test/SemaObjC/attr-swift_objc_members.m
The file was modifiedclang/include/clang/Basic/ (diff)
Commit 55d371abd7f470496f45d960c29bb66da0e81aee by spatel
[InstSimplify] add folds for fmin/fmax with 'nnan'

maximum(nnan X, +INF) --> +INF
minimum(nnan X, -INF) --> -INF

This is based on the similar codegen transform proposed in:
The file was modifiedllvm/lib/Analysis/InstructionSimplify.cpp (diff)
The file was modifiedllvm/test/Transforms/InstSimplify/fminmax-folds.ll (diff)
Commit ed0abc8ad3f3be99f40c25238ec42065a8ba077f by tkeith
[flang] Correctly detect overlapping integer cases

Integer case values were being compared as unsigned by operator<
on evaluate::value::Integer. Change that to signed so that overlap
can be detected correctly.

Explicit CompareUnsigned and BLT are still available if unsigned
comparison is needed.


Differential Revision:
The file was modifiedflang/test/Semantics/case01.f90 (diff)
The file was modifiedflang/include/flang/Evaluate/integer.h (diff)