PHP 8 Opcache API #4
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beberlei
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1. For statement "$a->change($a = array("a" => range(1, 5)));", the
following opcodes will be generated:
0002 ASSIGN CV0($a) V1
0003 INIT_METHOD_CALL 1 CV0($a) string("change")
0004 INIT_NS_FCALL_BY_NAME 2 string("A\range")
0005 SEND_VAL_EX int(1) 1
0006 SEND_VAL_EX int(5) 2
0007 V1 = DO_FCALL_BY_NAME
The updates in function zend_jit_init_fcall(), zend_jit_send_val() and
zend_jit_do_fcall() are made to support INIT_NS_FCALL_BY_NAME,
SEND_VAL_EX and DO_FCALL_BY_NAME respectively.
2. For method $change(), opcode RECV is used to obtain the argument:
0000 #1.CV0($config) [rc1, rcn, array of [any, ref]] = RECV 1
Accordingly the updates in functions zend_jit_recv() and
zend_jit_verify_arg_type() are made.
3. For statement "array_keys($config["a"])", the following opcodes will
be generated:
0001 INIT_NS_FCALL_BY_NAME 1 string("A\array_keys")
0002 CHECK_FUNC_ARG 1
0003 #3.V1 [ref, rc1, rcn, any] = FETCH_DIM_FUNC_ARG #1.CV0($config)
... -> #2.CV0($config) [rc1, rcn, ...
0004 SEND_FUNC_ARG #3.V1 [ref, rc1, rcn, any] 1
0005 #4.V1 [ref, rc1, rcn, any] = DO_FCALL_BY_NAME
CHECK_FUNC_ARG and SEND_FUNC_ARG are not supported before. See the
updates in functions zend_jit_check_func_arg() and zend_jit_send_var().
Besides, a new path is covered in macro OBJ_RELEASE when leaving.
beberlei
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Jun 19, 2021
The following opcodes would be generated for $foo: 0000 #2.CV0($test) [bool] RANGE[0..1] = RECV 1 0001 #3.CV1($x) [long] RANGE[MIN..MAX] = RECV 2 0002 JMPZ #2.CV0($test) [bool] RANGE[0..1] BB4 0003 #4.T2 [bool] ... = IS_SMALLER_OR_EQUAL int(1) #3.CV1($x) ... 0004 JMP BB5 ... The updates in function zend_jit_verify_arg_type() are made to support RECV opcode. The updates in function zend_jit_bool_jmpznz() are made to support JMPZ opcode. New path is covered in functions zend_jit_cmp() and zend_jit_cmp_long_long() for IS_SMALLER_OR_EQUAL opcode.
beberlei
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Jun 19, 2021
Opcodes for $test are: BB0: 0000 #1.CV0($char_code) [rc1, rcn, any] = RECV 1 BB1: 0001 #2.T1 [rc1, ...] = BW_AND #1.CV0($char_code) ... 0002 #3.T2 [bool] RANGE[0..1] = BOOL_NOT #2.T1 [rc1, ...] 0003 #4.T1 [bool] RANGE[0..1] = IS_EQUAL #1.CV0($char_code) ... 0004 JMPZ #4.T1 [bool] RANGE[0..1] BB3 ... New path is covered in function zend_jit_long_math_helper() for opcode BW_AND. New path is covered in function zend_jit_bool_jmpznz() for opcode BOOL_NOT. Major changes lie in functions zend_jit_cmp(), zend_jit_cmp_slow() and zend_jit_check_exception_undef_result() to support opocdes IS_EQUAL and JMPZ.
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This PR contains the changes needed to persist attributes in Opcache for PHP 8. It uses macros to avoid a lot of code duplication without paying the cost of additional function calls.