rb_call_info_t: shrink to 96 bytes from 104 bytes on 64-bit

This keeps ci->flag and ci->aux.index consistent across 32-bit
and 64-bit platforms.

ci->flag: VM_CALL_* flags only use 9 bits, currently
ci->aux.index: 2 billion ivars per class should be enough for anybody

This saves around 50K allocations on "valgrind ruby -e exit" on x86-64
before:
  total heap usage: 48,122 allocs, 19,253 frees, 8,099,197 bytes allocated
after:
  total heap usage: 48,069 allocs, 19,214 frees, 8,047,266 bytes allocated

* vm_core.h (rb_call_info_t): ci->flag becomes 32-bit unsigned int
  ci->index becomes a 32-bit signed int (from signed long).
  Reorder for better packing on 64-bit, giving an 8 byte reduction
  from 104 to 96 bytes for each ci.

* compile.c (new_callinfo, setup_args, iseq_compile_each,
  iseq_build_from_ary_body): adjust for type changes

* vm_insnhelper.c (vm_getivar): ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47509 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 2c43e06f63..c9ec803630 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -498,7 +498,7 @@ vm_getivar(VALUE obj, ID id, IC ic, rb_call_info_t *ci, int is_attr)
 
 	if (LIKELY((!is_attr && ic->ic_serial == RCLASS_SERIAL(klass)) ||
 		   (is_attr && ci->aux.index > 0))) {
-	    long index = !is_attr ? (long)ic->ic_value.index : ci->aux.index - 1;
+	    int index = !is_attr ? (int)ic->ic_value.index : ci->aux.index - 1;
 	    long len = ROBJECT_NUMIV(obj);
 	    VALUE *ptr = ROBJECT_IVPTR(obj);
 
@@ -522,7 +522,7 @@ vm_getivar(VALUE obj, ID id, IC ic, rb_call_info_t *ci, int is_attr)
 			ic->ic_serial = RCLASS_SERIAL(klass);
 		    }
 		    else { /* call_info */
-			ci->aux.index = index + 1;
+			ci->aux.index = (int)index + 1;
 		    }
 		}
 	    }