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Take inline trampoline into account when optimizing fall-through jumps

The IR2-level optimisation bug manifests itself as randomly bogus
code in the presence of tail and local calls to the same function.

Reported by Eric Marsden on sbcl-devel.

Test case by Anton Kovalenko.

Fixes lp#883500

Paul Khuong Paul Khuong 2011-10-30

changed src/compiler/ir2opt.lisp
changed tests/compiler.pure.lisp
changed NEWS
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