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When encountering the following SSA graph:
BB1:
#2.T1 [string] = COALESCE #1.CV0($str) [null, string] BB2
BB2:
#5.T1 [string] = QM_ASSIGN string("")
BB3:
#7.X1 [string] = Phi(#2.X1 [string], #5.X1 [string])
FREE #7.T1 [string]
We would currently determine that #7, #5 are dead, and eliminate
the FREE and QM_ASSIGN. However, we cannot eliminate #2, as
COALESCE is also responsible for control flow.
Fix this my marking all non-CV phis as live to start with. This
can be relaxed to check the kind of the source instruction, but
I couldn't immediately come up with a case where it would be
useful.
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1. For statement "$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.
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The opcodes for function $foo are:
0001 INIT_FCALL 1 96 string("var_dump")
0002 #2.T1 [null, long] = FETCH_DIM_R array(...) #1.CV0($n) [...]
0003 SEND_VAL #2.T1 [null, long] 1
0004 DO_ICALL
0005 RETURN null
Opcode FETCH_DIM_R is not touched before, and the updates in function
zend_jit_fetch_dim_read() are made to support it.
As different types of arguments are used for $foo, several cases in
function zend_jit_fetch_dimension_address_inner() are covered as well.
Besides, opcode DO_ICALL can reach one site of cold code in function
zend_jit_do_fcall().
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Opcodes for $Test::method are:
BB0:
0000 #0.T0 [rcn, any] = FETCH_OBJ_R THIS string("prop")
0001 #1.T0 [bool] RANGE[0..1] = JMPZ_EX #0.T0 [rcn, any] BB3
BB1:
0002 #2.T1 [rcn, any] = FETCH_OBJ_R THIS string("prop")
0003 INIT_METHOD_CALL 0 #2.T1 [rcn, any] string("method2")
0004 #3.V1 [ref, rc1, rcn, any] = DO_FCALL
...
New path is covered in functions zend_jit_fetch_obj() and
zend_jit_zval_copy_deref() for FETCH_OBJ_R THIS opcode.
New path is covered in function zend_jit_init_method_call() for opcode
INIT_METHOD_CALL.
Major chagnes lie in function zend_jit_bool_jmpznz() to support opcode
JMPZ_EX.
Note that macro ZVAL_DTOR_FUNC is updated to remove the hard-coded use
of REG0.
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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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* JIT/AArch64: Support shifted immediate As pointed out by MikePall in [1], shifted immediate value is supported. See [2]. For example, `add x0, x1, php#4096` would be encoded by DynASM into `add x0, x1, #1, lsl #12` directly. In this patch, a helper is added to check whether an immediate value is in the two allowed ranges: (1) 0 to 4095, and (2) LSL #12 on all the values from the first range. Note that this helper works for add/adds/sub/subs/cmp/cmn instructions. [1] LuaJIT/LuaJIT#718 [2] https://github.com/LuaJIT/LuaJIT/blob/v2.1/dynasm/dasm_arm64.lua#L342 Change-Id: I4870048b9b8e6c429b73a4803af2a3b2d5ec0fbb * Deprecatd CMP_IMM/ADD_SUB_IMM and add test cases Macros CMP_IMM and ADD_SUB_IMM are deprecated and instead we use this helper to guard the immediate encoding. Add two 64-bit only test cases, since 64-bit integers are used and tested inside. Change-Id: I0b42d4617b40372e2f4ce5b6ad31a4ddb7d89e49
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