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add `nil?' primitive

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* libguile/boolean.c (scm_nil_p): New function.

* libguile/vm-i-scheme.c (nilp, not_nilp):
* libguile/vm-i-system.c (br_if_nil, br_if_not_nil): New instructions.
  Renumber other ops.

* libguile/_scm.h (SCM_OBJCODE_MINOR_VERSION): Increment.

* module/language/assembly/compile-bytecode.scm (compile-bytecode): Add
  support for writing `br-if-nil' and `br-if-not-nil' instructions.

* module/language/assembly/disassemble.scm (code-annotation): Add
  `br-if-nil' and `br-if-not-nil' to the list of branch instructions.

* module/language/tree-il/compile-glil.scm: Add `nil?' to
  `*primcall-ops*'.
  (flatten): Use the new branch instructions for `nil?' conditionals.

* module/language/tree-il/primitives.scm: Add `nil?' to
  `*interesting-primitive-names*', `*effect-free-primitives', and
  `*effect+exception-free-primitives*'.
This commit is contained in:
BT Templeton 2011-06-15 20:21:28 -04:00
parent 6937c7aa8b
commit 9348168ed5
8 changed files with 180 additions and 132 deletions
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2
module/language/assembly/compile-bytecode.scm
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@ -133,6 +133,8 @@
((br-if-not-eq ,l) (write-break l))
((br-if-null ,l) (write-break l))
((br-if-not-null ,l) (write-break l))
((br-if-nil ,l) (write-break l))
((br-if-not-nil ,l) (write-break l))
((br-if-nargs-ne ,hi ,lo ,l) (write-byte hi) (write-byte lo) (write-break l))
((br-if-nargs-lt ,hi ,lo ,l) (write-byte hi) (write-byte lo) (write-break l))
((br-if-nargs-gt ,hi ,lo ,l) (write-byte hi) (write-byte lo) (write-break l))