* module/language/tree-il/effects.scm (make-effects-analyzer):
Fix analysis for list, cons, make-prompt-tage, and vector; &allocation
is a `cause' effect. Fixes#21899.
* test-suite/tests/cse.test ("cse"): Add test case.
* module/language/tree-il/effects.scm (make-effects-analyzer): Be more
precise regarding the effects of the so-called
effect+exception-free-primitives: now we check their arities.
* test-suite/tests/cse.test ("cse"): Add a test that we don't
elide (cons 1 2 3) in effect context.
* module/language/tree-il/effects.scm (make-effects-analyzer): The
analyzer will take an optional second argument, a lookup procedure of
type sym -> exp. This can let the analyzer dig into calls to
lexically bound procedures.
