Merge the implementation of B::sv_{undef,no,yes} using ALIAS.

On this platform, this reduces the object code size by around .75K.

diff --git a/ext/B/B.xs b/ext/B/B.xs
index 51ad9a9..3ab820e 100644 (file)
--- a/ext/B/B.xs
+++ b/ext/B/B.xs
@@ -622,9 +622,6 @@ BOOT:
 #define B_defstash()   PL_defstash
 #define B_curstash()   PL_curstash
 #define B_comppadlist()        (PL_main_cv ? CvPADLIST(PL_main_cv) : CvPADLIST(PL_compcv))
-#define B_sv_undef()   &PL_sv_undef
-#define B_sv_yes()     &PL_sv_yes
-#define B_sv_no()      &PL_sv_no
 #define B_formfeed()   PL_formfeed
 #ifdef USE_ITHREADS
 #define B_regex_padav()        PL_regex_padav
@@ -668,15 +665,6 @@ B_amagic_generation()
 B::AV
 B_comppadlist()
 
-B::SV
-B_sv_undef()
-
-B::SV
-B_sv_yes()
-
-B::SV
-B_sv_no()
-
 B::HV
 B_curstash()
 
@@ -698,6 +686,16 @@ B_diehook()
 
 MODULE = B     PACKAGE = B
 
+B::SV
+sv_undef()
+    ALIAS:
+       sv_no = 1
+       sv_yes = 2
+    CODE:
+       RETVAL = ix > 1 ? &PL_sv_yes : ix < 1 ? &PL_sv_undef : &PL_sv_no;
+    OUTPUT:
+       RETVAL
+
 B::OP
 main_root()
     ALIAS: