Fix some repo-mode llvm tests
Summary: - trflags is sometimes nonzero for fallback, so properly implement it
- The comment in ratToAssertType about already knowing Cell and Ref in the jit
is only true for stack slots, not locals. Losing this type information was
giving us a Gen base for a minstr instruction, upsetting one of the
assertions. It was llvm-only because we change the length and shape of
tracelets by forcing a break after FCall, and this kind of bug tends to
depend on that.
Reviewed By: @jasone
Differential Revision:
D1742487