1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/****************************************************************
* *
* Copyright 2012 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "lv_val.h"
#include "toktyp.h"
#include "compiler.h"
#include "opcode.h"
#include "indir_enum.h"
#include "cache.h"
#include "op.h"
#include <rtnhdr.h>
#include "valid_mname.h"
#include "gtm_string.h"
#include "cachectl.h"
#include "gtm_text_alloc.h"
#include "callg.h"
#include "mdq.h"
#include "stack_frame.h"
#include "stringpool.h"
#include "mv_stent.h"
#include "min_max.h"
#include "glvn_pool.h"
GBLREF stack_frame *frame_pointer;
/* Finds a slot in the glvn pool for saving a variable name. Used by SET and FOR */
uint4 op_glvnslot(uint4 recycle)
{
glvn_pool_entry *slot;
uint4 indx, findx;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
GLVN_POOL_EXPAND_IF_NEEDED;
indx = (TREF(glvn_pool_ptr))->top;
if (GLVN_POOL_UNTOUCHED == GLVN_INDX(frame_pointer))
/* low water mark - drain back to here when frame is unwound */
SET_GLVN_INDX(frame_pointer, (indx) ? indx : GLVN_POOL_EMPTY);
slot = &(TREF(glvn_pool_ptr))->slot[indx];
slot->sav_opcode = OC_NOOP; /* flag the slot as not filled out in case something goes wrong */
if (ANY_SLOT != recycle)
{ /* attempt to reuse slot (for FOR control) */
assert((0 < recycle) && (recycle <= MAX_FOR_STACK));
findx = (TREF(glvn_pool_ptr))->for_slot[recycle];
if (((GLVN_INDX(frame_pointer) <= findx) || (GLVN_POOL_EMPTY == GLVN_INDX(frame_pointer))) && (findx < indx))
{ /* reuse and pop anything beyond it */
slot = &(TREF(glvn_pool_ptr))->slot[findx];
(TREF(glvn_pool_ptr))->top = findx + 1;
(TREF(glvn_pool_ptr))->mval_top = slot->mval_top;
return findx;
}
/* point new slot's precursor field at indx, which corresponds an earlier frame */
(TREF(glvn_pool_ptr))->for_slot[recycle] = indx;
slot->precursor = (findx < indx) ? findx : GLVN_POOL_EMPTY;
}
slot->mval_top = (TREF(glvn_pool_ptr))->mval_top;
return (TREF(glvn_pool_ptr))->top++;
}
|
