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Allow string->utf8 to constant-fold

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* module/language/tree-il/primitives.scm (*interesting-primitive-names*):
(*primitive-accessors*): Add string->utf8, utf8->string, and
string-utf8-length.
(primitive-module): New public function, moved here from (language
tree-il compile-bytecode).

* module/language/tree-il/compile-bytecode.scm: Use primitive-module
from (language tree-il primitives).

* module/language/tree-il/peval.scm (peval): A bugfix: load primitives
from their proper module.  Allows bytevector primitives to fold.

* module/language/cps/guile-vm/reify-primitives.scm:
* module/language/cps/effects-analysis.scm:
* module/language/cps/types.scm
* module/language/tree-il/primitives.scm:
* module/language/tree-il/cps-primitives.scm:
* module/language/tree-il/effects.scm (make-effects-analyzer):
Add string->utf8, utf8->string, and string-utf8-length.

* module/language/tree-il/compile-cps.scm (string->utf8)
(string-utf8-length, utf8->string): New custom lowerers, including type
checks and an unboxed result for string-utf8-length.

* module/system/vm/assembler.scm:
* libguile/intrinsics.h:
* libguile/intrinsics.c: Because string-utf8-length returns an unboxed
value, we need an intrinsic for it; go ahead and add an intrinsic for
string->utf8 and utf8->string too, as we will likely be able to use
these in the future.
This commit is contained in:
Andy Wingo 2023-11-15 10:18:37 +01:00
parent 437e5ac43d
commit d08cc4f6e2
12 changed files with 186 additions and 111 deletions
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3
libguile/intrinsics.h
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@ -218,6 +218,9 @@ typedef void (*scm_t_scm_uimm_scm_intrinsic) (SCM, uint8_t, SCM);
M(scm_from_scmn_scmn, lookup_bound_public, "lookup-bound-public", LOOKUP_BOUND_PUBLIC) \
M(scm_from_scmn_scmn, lookup_bound_private, "lookup-bound-private", LOOKUP_BOUND_PRIVATE) \
M(scm_from_scm, symbol_to_string, "symbol->string", SYMBOL_TO_STRING) \
M(scm_from_scm, string_to_utf8, "string->utf8", STRING_TO_UTF8) \
M(u64_from_scm, string_utf8_length, "string-utf8-length", STRING_UTF8_LENGTH) \
M(scm_from_scm, utf8_to_string, "utf8->string", UTF8_TO_STRING) \
/* Add new intrinsics here; also update scm_bootstrap_intrinsics. */
/* Intrinsics prefixed with $ are meant to reduce bytecode size,