swift

090a7a33 - SILCombine: fix a problem with thin_to_thick_function elimination.

SILCombine: fix a problem with thin_to_thick_function elimination. The optimizer can generate a thin_to_thick_function conversion from a throwing thin to a non-throwing thick function (in case it can prove that the function is actually not throwing). Therefore, when removing such a conversion from the callee-argument of an apply, we have to check if the new callee (= the argument of the thin_to_thick_function) is a throwing function and set the not-throwing flag in this case. This fixes a SILVerifier crash. rdar://problem/56358645