Hi,
I was browsing bugs.call-cc.org and found this low hanging bug so I gave it a
shot.
I hope I didn’t mess up too much.
>From fcba39930dcb56cc16500531fa37cf0fe0a4aaef Mon Sep 17 00:00:00 2001
From: Kooda <ko...@upyum.com>
Date: Wed, 18 May 2016 10:48:58 +0200
Subject: [PATCH] Make locative-ref inlineable (ticket #1260)
- Deprecate C_localtive_ref
- Add C_a_i_locative_ref
- Add a compiler rewrite for locative-ref
- Add a specialization for locative-ref on locatives
---
c-platform.scm | 2 +-
chicken.h | 3 ++-
lolevel.scm | 3 ++-
runtime.c | 27 ++++++++++++++++++++++++++-
types.db | 4 +++-
5 files changed, 34 insertions(+), 5 deletions(-)
diff --git a/c-platform.scm b/c-platform.scm
index b2f6629..3e7548b 100644
--- a/c-platform.scm
+++ b/c-platform.scm
@@ -533,7 +533,6 @@
(rewrite 'call-with-values 13 2 "C_call_with_values" #t)
(rewrite '##sys#call-with-values 13 2 "C_u_call_with_values" #f)
(rewrite '##sys#call-with-values 13 2 "C_call_with_values" #t)
-(rewrite 'locative-ref 13 1 "C_locative_ref" #t)
(rewrite '##sys#continuation-graft 13 2 "C_continuation_graft" #t)
(rewrite 'caar 2 1 "C_u_i_caar" #f)
@@ -874,6 +873,7 @@
(rewrite 'address->pointer 16 1 "C_a_i_address_to_pointer" #f 2)
(rewrite 'pointer->address 16 1 "C_a_i_pointer_to_address" #f words-per-flonum)
(rewrite 'pointer+ 16 2 "C_a_u_i_pointer_inc" #f 2)
+(rewrite 'locative-ref 16 1 "C_a_i_locative_ref" #t words-per-flonum)
(rewrite 'pointer-u8-ref 2 1 "C_u_i_pointer_u8_ref" #f)
(rewrite 'pointer-s8-ref 2 1 "C_u_i_pointer_s8_ref" #f)
diff --git a/chicken.h b/chicken.h
index 160d40d..3f00956 100644
--- a/chicken.h
+++ b/chicken.h
@@ -1831,7 +1831,7 @@ C_fctexport C_cpsproc(C_register_finalizer) C_noret;
C_fctexport C_cpsproc(C_set_dlopen_flags) C_noret;
C_fctexport C_cpsproc(C_dload) C_noret;
C_fctexport C_cpsproc(C_become) C_noret;
-C_fctexport C_cpsproc(C_locative_ref) C_noret;
+C_fctexport C_cpsproc(C_locative_ref) C_noret; /* DEPRECATED */
C_fctexport C_cpsproc(C_call_with_cthulhu) C_noret;
C_fctexport C_cpsproc(C_copy_closure) C_noret;
C_fctexport C_cpsproc(C_dump_heap_state) C_noret;
@@ -1923,6 +1923,7 @@ C_fctexport C_word C_fcall C_i_char_greaterp(C_word x,
C_word y) C_regparm;
C_fctexport C_word C_fcall C_i_char_lessp(C_word x, C_word y) C_regparm;
C_fctexport C_word C_fcall C_i_char_greater_or_equal_p(C_word x, C_word y)
C_regparm;
C_fctexport C_word C_fcall C_i_char_less_or_equal_p(C_word x, C_word y)
C_regparm;
+C_fctexport C_word C_fcall C_a_i_locative_ref(C_word **a, int c, C_word loc)
C_regparm;
C_fctexport C_word C_fcall C_i_locative_set(C_word loc, C_word x) C_regparm;
C_fctexport C_word C_fcall C_i_locative_to_object(C_word loc) C_regparm;
C_fctexport C_word C_fcall C_a_i_make_locative(C_word **a, int c, C_word type,
C_word object, C_word index, C_word weak) C_regparm;
diff --git a/lolevel.scm b/lolevel.scm
index 7a1724f..1ac2eed 100644
--- a/lolevel.scm
+++ b/lolevel.scm
@@ -298,7 +298,8 @@ EOF
(define locative-ref
(getter-with-setter
- (##core#primitive "C_locative_ref")
+ (lambda (loc)
+ (##core#inline_allocate ("C_a_i_locative_ref" 4) loc))
locative-set!
"(locative-ref loc)"))
diff --git a/runtime.c b/runtime.c
index 113e26d..c61d5d2 100644
--- a/runtime.c
+++ b/runtime.c
@@ -8780,7 +8780,7 @@ C_regparm C_word C_fcall C_a_i_make_locative(C_word **a,
int c, C_word type, C_w
return (C_word)loc;
}
-
+/* DEPRECATED */
void C_ccall C_locative_ref(C_word c, C_word *av)
{
C_word
@@ -8816,6 +8816,31 @@ void C_ccall C_locative_ref(C_word c, C_word *av)
}
}
+C_regparm C_word C_fcall C_a_i_locative_ref(C_word **a, int c, C_word loc)
+{
+ C_word *ptr;
+
+ if(C_immediatep(loc) || C_block_header(loc) != C_LOCATIVE_TAG)
+ barf(C_BAD_ARGUMENT_TYPE_ERROR, "locative-ref", loc);
+
+ ptr = (C_word *)C_block_item(loc, 0);
+
+ if(ptr == NULL) barf(C_LOST_LOCATIVE_ERROR, "locative-ref", loc);
+
+ switch(C_unfix(C_block_item(loc, 2))) {
+ case C_SLOT_LOCATIVE: return *ptr;
+ case C_CHAR_LOCATIVE: return C_make_character(*((char *)ptr));
+ case C_U8_LOCATIVE: return C_fix(*((unsigned char *)ptr));
+ case C_S8_LOCATIVE: return C_fix(*((char *)ptr));
+ case C_U16_LOCATIVE: return C_fix(*((unsigned short *)ptr));
+ case C_S16_LOCATIVE: return C_fix(*((short *)ptr));
+ case C_U32_LOCATIVE: return C_unsigned_int_to_num(a, *((C_u32 *)ptr));
+ case C_S32_LOCATIVE: return C_int_to_num(a, *((C_s32 *)ptr));
+ case C_F32_LOCATIVE: return C_flonum(a, *((float *)ptr));
+ case C_F64_LOCATIVE: return C_flonum(a, *((double *)ptr));
+ default: panic(C_text("bad locative type"));
+ }
+}
C_regparm C_word C_fcall C_i_locative_set(C_word loc, C_word x)
{
diff --git a/types.db b/types.db
index b4a3887..b1165c0 100644
--- a/types.db
+++ b/types.db
@@ -1502,7 +1502,9 @@
(extended-procedure? (#(procedure #:clean) extended-procedure (*) boolean))
(free (#(procedure #:clean #:enforce) free (pointer) undefined))
(locative->object (#(procedure #:clean #:enforce) locative->object (locative)
*))
-(locative-ref (#(procedure #:clean #:enforce) locative-ref (locative) *))
+(locative-ref (#(procedure #:clean #:enforce) locative-ref (locative) *)
+ ((locative)
+ (##core#inline_allocate ("C_a_i_locative_ref" 4) #(1))))
(locative-set! (#(procedure #:enforce) locative-set! (locative *) *))
(locative? (#(procedure #:pure #:predicate locative) locative? (*) boolean))
(make-locative (#(procedure #:clean #:enforce) make-locative (* #!optional
fixnum) locative))
--
2.1.4
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