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7382f23e58
* libguile/vm-i-scheme.c: Add add1 and sub1 instructions.
* module/language/tree-il/compile-glil.scm: Compile 1+ and 1- to add1
and sub1.
* module/language/tree-il/primitives.scm (define-primitive-expander):
Add support for `if' statements in the consequent.
(+, -): Compile (- x 1), (+ x 1), and (+ 1 x) to 1- or 1+ as
appropriate.
(1-): Remove this one. Seems we forgot 1+ before, but we weren't
compiling it nicely anyway.
* test-suite/tests/tree-il.test ("void"): Fix expected compilation of (+
(void) 1) to allow for add1.
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