At some point, pass definitions were heavily macro-ized. Pass
descriptive names were added in two places. This is not only redundant
but a source of confusion. You could waste a lot of time grepping for
the wrong string. I removed all the getName() overrides which, at
around 90 passes, was a fairly significant amount of code bloat.
Any pass that we want to be able to invoke by name from a tool
(sil-opt) or pipeline plan *should* have unique type name, enum value,
commend-line string, and name string. I removed a comment about the
various inliner passes that contradicted that.
Side note: We should be consistent with the policy that a pass is
identified by its type. We have a couple passes, LICM and CSE, which
currently violate that convention.
Also, add a third [serializable] state for functions whose bodies we
*can* serialize, but only do so if they're referenced from another
serialized function.
This will be used for bodies synthesized for imported definitions,
such as init(rawValue:), etc, and various thunks, but for now this
change is NFC.
SubstitutionList is going to be a more compact representation of
a SubstitutionMap, suitable for inline allocation inside another
object.
For now, it's just a typedef for ArrayRef<Substitution>.
We do this by creating a shared function that calls the builtin int_trap.
Eventually I am going to use this to test a runtime bug reducer. But that is for
another day.
Previously, bug reducer tester would just assert when it saw a direct apply to
its target function. Now we add support for also causing a miscompile by just
deleting the apply. This is tested by eliminating an apply to putchar to ensure
we are not dependent on any stdlib details.
This pass works by blowing up if it finds an apply that calls a function
specified via the cl command line option 'bug-reducer-tester-target-func'. This
makes it easy to test sil-bug-reducer.
