102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2011 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "mdq.h"
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#include "hashtab_str.h"
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#include "compiler.h"
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#include "opcode.h"
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#include "mmemory.h"
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GBLREF int mlitmax;
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GBLREF mliteral literal_chain;
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GBLREF hash_table_str *complits_hashtab;
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oprtype put_lit(mval *x)
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{
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mliteral *a;
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triple *ref;
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boolean_t usehtab, added;
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stringkey litkey;
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ht_ent_str *litent;
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assert(MV_DEFINED(x));
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MV_FORCE_STR(x);
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DEBUG_ONLY(litent = NULL);
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ref = newtriple(OC_LIT);
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ref->operand[0].oprclass = MLIT_REF;
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/* Multiple reasons to use hashtab since coerce which processes integer parms to functions will
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actually *remove* literals if they were just put on so we don't want to convert to hashtab
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then have that literal and/or some others yanked to pull us back under the count as that would
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confuse things mightily.
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*/
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usehtab = (LIT_HASH_CUTOVER < mlitmax) || (complits_hashtab && complits_hashtab->base);
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if (!usehtab)
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{ /* Brute force scan under cutover .. should include all intrinsics */
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dqloop(&literal_chain, que, a)
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if (is_equ(x, &(a->v)))
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{
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a->rt_addr--;
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ref->operand[0].oprval.mlit = a;
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return put_tref(ref);
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}
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} else
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{ /* Use hash table -- load it up if haven't created it yet */
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if (!complits_hashtab)
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{
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complits_hashtab = (hash_table_str *)malloc(SIZEOF(hash_table_str));
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complits_hashtab->base = NULL;
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}
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if (!complits_hashtab->base)
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{ /* Need to initialize hash table and load it with the elements so far */
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init_hashtab_str(complits_hashtab, LIT_HASH_CUTOVER * 2, HASHTAB_NO_COMPACT, HASHTAB_NO_SPARE_TABLE);
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assert(complits_hashtab->base);
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dqloop(&literal_chain, que, a)
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{
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litkey.str = a->v.str;
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COMPUTE_HASH_STR(&litkey);
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added = add_hashtab_str(complits_hashtab, &litkey, a, &litent);
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assert(added);
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assert(litent->value);
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assert(litent->key.str.addr == ((mliteral *)litent->value)->v.str.addr);
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}
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}
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/* Set the hash value in this element */
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litkey.str = x->str;
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COMPUTE_HASH_STR(&litkey);
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added = add_hashtab_str(complits_hashtab, &litkey, NULL, &litent);
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if (!added)
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{ /* Hash entry exists for this literal */
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a = (mliteral *)litent->value;
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assert(a);
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assert(MV_DEFINED(&(a->v)));
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assert(is_equ(x, &(a->v)));
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a->rt_addr--;
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ref->operand[0].oprval.mlit = a;
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return put_tref(ref);
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}
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}
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ref->operand[0].oprval.mlit = a = (mliteral *)mcalloc(SIZEOF(mliteral));
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dqins(&literal_chain, que, a);
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a->rt_addr = -1;
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a->v = *x;
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if (usehtab)
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{ /* Now that new mlit is created, place it in created hashtab entry */
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assert(litent);
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litent->value = a;
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assert(litent->key.str.addr == ((mliteral *)litent->value)->v.str.addr);
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assert(litent->key.str.len == ((mliteral *)litent->value)->v.str.len);
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}
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mlitmax++;
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return put_tref(ref);
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}
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