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Remove ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT (#3217)

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Ecma-string hash limit has already been increased to UINT32_MAX so all the string hashes can be stored directly in the hashmap.
This patch fixes #3216.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-10-16 13:59:43 +02:00
committed by Zoltan Herczeg
parent f0e432c9b9
commit 7518b7bfe6
1 changed files with 4 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jerry-core/ecma/base/ecma-property-hashmap.c
+4 -53
View File
@@ -28,11 +28,6 @@
#if ENABLED (JERRY_PROPRETY_HASHMAP)
/**
* Maximum number of properties that can be stored in a hashmap directly
*/
#define ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT (UINT16_MAX + 1)
/**
* Compute the total size of the property hashmap.
*/
@@ -134,7 +129,6 @@ ecma_property_hashmap_create (ecma_object_t *object_p) /**< object */
memset (hashmap_p, 0, total_size);
hashmap_p->header.types[0] = ECMA_PROPERTY_TYPE_HASHMAP;
hashmap_p->header.types[1] = 0;
hashmap_p->header.next_property_cp = object_p->u1.property_list_cp;
hashmap_p->max_property_count = max_property_count;
hashmap_p->null_count = max_property_count - named_property_count;
@@ -144,16 +138,6 @@ ecma_property_hashmap_create (ecma_object_t *object_p) /**< object */
uint8_t *bits_p = (uint8_t *) (pair_list_p + max_property_count);
uint32_t mask = max_property_count - 1;
uint8_t shift_counter = 0;
while (max_property_count > ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT)
{
shift_counter++;
max_property_count >>= 1;
}
hashmap_p->header.types[1] = shift_counter;
prop_iter_cp = object_p->u1.property_list_cp;
ECMA_SET_NON_NULL_POINTER (object_p->u1.property_list_cp, hashmap_p);
@@ -175,16 +159,7 @@ ecma_property_hashmap_create (ecma_object_t *object_p) /**< object */
property_pair_p->names_cp[i]);
uint32_t step = ecma_property_hashmap_steps[entry_index & (ECMA_PROPERTY_HASHMAP_NUMBER_OF_STEPS - 1)];
if (mask < ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT)
{
entry_index &= mask;
}
else
{
entry_index <<= shift_counter;
JERRY_ASSERT (entry_index <= mask);
}
entry_index &= mask;
#ifndef JERRY_NDEBUG
/* Because max_property_count (power of 2) and step (a prime
* number) are relative primes, all entries of the hasmap are
@@ -268,15 +243,8 @@ ecma_property_hashmap_insert (ecma_object_t *object_p, /**< object */
uint32_t entry_index = ecma_string_hash (name_p);
uint32_t step = ecma_property_hashmap_steps[entry_index & (ECMA_PROPERTY_HASHMAP_NUMBER_OF_STEPS - 1)];
uint32_t mask = hashmap_p->max_property_count - 1;
entry_index &= mask;
if (mask < ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT)
{
entry_index &= mask;
}
else
{
entry_index <<= hashmap_p->header.types[1];
}
#ifndef JERRY_NDEBUG
/* See the comment for this variable in ecma_property_hashmap_create. */
@@ -351,15 +319,7 @@ ecma_property_hashmap_delete (ecma_object_t *object_p, /**< object */
jmem_cpointer_t *pair_list_p = (jmem_cpointer_t *) (hashmap_p + 1);
uint8_t *bits_p = (uint8_t *) (pair_list_p + hashmap_p->max_property_count);
if (mask < ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT)
{
entry_index &= mask;
}
else
{
entry_index <<= hashmap_p->header.types[1];
JERRY_ASSERT (entry_index <= mask);
}
entry_index &= mask;
#ifndef JERRY_NDEBUG
/* See the comment for this variable in ecma_property_hashmap_create. */
@@ -453,16 +413,7 @@ ecma_property_hashmap_find (ecma_property_hashmap_t *hashmap_p, /**< hashmap */
uint32_t mask = hashmap_p->max_property_count - 1;
jmem_cpointer_t *pair_list_p = (jmem_cpointer_t *) (hashmap_p + 1);
uint8_t *bits_p = (uint8_t *) (pair_list_p + hashmap_p->max_property_count);
if (mask < ECMA_PROPERTY_HASHMAP_SHIFT_LIMIT)
{
entry_index &= mask;
}
else
{
entry_index <<= hashmap_p->header.types[1];
JERRY_ASSERT (entry_index <= mask);
}
entry_index &= mask;
#ifndef JERRY_NDEBUG
/* See the comment for this variable in ecma_property_hashmap_create. */