[PATCH 12/15] i386: Fix non-robust split condition in define_insn_and_split

[Kewen.Lin]

Hi Uros,

on 2021/11/17 下午3:13, Uros Bizjak wrote:
> On Thu, Nov 11, 2021 at 12:25 PM Kewen Lin <linkw@linux.ibm.com> wrote:
>>
>> This patch is to fix some non-robust split conditions in some
>> define_insn_and_splits, to make each of them applied on top of
>> the corresponding condition for define_insn part, otherwise the
>> splitting could perform unexpectedly.
>>
>> gcc/ChangeLog:
>>
>>         * config/i386/i386.md (*add<dwi>3_doubleword, *addv<dwi>4_doubleword,
>>         *addv<dwi>4_doubleword_1, *sub<dwi>3_doubleword,
>>         *subv<dwi>4_doubleword, *subv<dwi>4_doubleword_1,
>>         *add<dwi>3_doubleword_cc_overflow_1, *divmodsi4_const,
>>         *neg<dwi>2_doubleword, *tls_dynamic_gnu2_combine_64_<mode>): Fix split
>>         condition.
> 
> OK.
> 

Thanks!  Committed as r12-5334.

BR,
Kewen

> Thanks,
> Uros.
> 
>> ---
>>  gcc/config/i386/i386.md | 20 ++++++++++----------
>>  1 file changed, 10 insertions(+), 10 deletions(-)
>>
>> diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
>> index 6eb9de81921..2bd09e502ae 100644
>> --- a/gcc/config/i386/i386.md
>> +++ b/gcc/config/i386/i386.md
>> @@ -5491,7 +5491,7 @@ (define_insn_and_split "*add<dwi>3_doubleword"
>>     (clobber (reg:CC FLAGS_REG))]
>>    "ix86_binary_operator_ok (PLUS, <DWI>mode, operands)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CCC FLAGS_REG)
>>                    (compare:CCC
>>                      (plus:DWIH (match_dup 1) (match_dup 2))
>> @@ -6300,7 +6300,7 @@ (define_insn_and_split "*addv<dwi>4_doubleword"
>>         (plus:<DWI> (match_dup 1) (match_dup 2)))]
>>    "ix86_binary_operator_ok (PLUS, <DWI>mode, operands)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CCC FLAGS_REG)
>>                    (compare:CCC
>>                      (plus:DWIH (match_dup 1) (match_dup 2))
>> @@ -6347,7 +6347,7 @@ (define_insn_and_split "*addv<dwi>4_doubleword_1"
>>     && CONST_SCALAR_INT_P (operands[2])
>>     && rtx_equal_p (operands[2], operands[3])"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CCC FLAGS_REG)
>>                    (compare:CCC
>>                      (plus:DWIH (match_dup 1) (match_dup 2))
>> @@ -6641,7 +6641,7 @@ (define_insn_and_split "*sub<dwi>3_doubleword"
>>     (clobber (reg:CC FLAGS_REG))]
>>    "ix86_binary_operator_ok (MINUS, <MODE>mode, operands)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CC FLAGS_REG)
>>                    (compare:CC (match_dup 1) (match_dup 2)))
>>               (set (match_dup 0)
>> @@ -6817,7 +6817,7 @@ (define_insn_and_split "*subv<dwi>4_doubleword"
>>         (minus:<DWI> (match_dup 1) (match_dup 2)))]
>>    "ix86_binary_operator_ok (MINUS, <MODE>mode, operands)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CC FLAGS_REG)
>>                    (compare:CC (match_dup 1) (match_dup 2)))
>>               (set (match_dup 0)
>> @@ -6862,7 +6862,7 @@ (define_insn_and_split "*subv<dwi>4_doubleword_1"
>>     && CONST_SCALAR_INT_P (operands[2])
>>     && rtx_equal_p (operands[2], operands[3])"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CC FLAGS_REG)
>>                    (compare:CC (match_dup 1) (match_dup 2)))
>>               (set (match_dup 0)
>> @@ -7542,7 +7542,7 @@ (define_insn_and_split "*add<dwi>3_doubleword_cc_overflow_1"
>>         (plus:<DWI> (match_dup 1) (match_dup 2)))]
>>    "ix86_binary_operator_ok (PLUS, <DWI>mode, operands)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel [(set (reg:CCC FLAGS_REG)
>>                    (compare:CCC
>>                      (plus:DWIH (match_dup 1) (match_dup 2))
>> @@ -9000,7 +9000,7 @@ (define_insn_and_split "*divmodsi4_const"
>>     (clobber (reg:CC FLAGS_REG))]
>>    "!optimize_function_for_size_p (cfun)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(set (match_dup 0) (match_dup 2))
>>     (set (match_dup 1) (match_dup 4))
>>     (parallel [(set (match_dup 0)
>> @@ -10515,7 +10515,7 @@ (define_insn_and_split "*neg<dwi>2_doubleword"
>>     (clobber (reg:CC FLAGS_REG))]
>>    "ix86_unary_operator_ok (NEG, <DWI>mode, operands)"
>>    "#"
>> -  "reload_completed"
>> +  "&& reload_completed"
>>    [(parallel
>>      [(set (reg:CCC FLAGS_REG)
>>           (ne:CCC (match_dup 1) (const_int 0)))
>> @@ -16898,7 +16898,7 @@ (define_insn_and_split "*tls_dynamic_gnu2_combine_64_<mode>"
>>     (clobber (reg:CC FLAGS_REG))]
>>    "TARGET_64BIT && TARGET_GNU2_TLS"
>>    "#"
>> -  ""
>> +  "&& 1"
>>    [(set (match_dup 0) (match_dup 4))]
>>  {
>>    operands[4] = can_create_pseudo_p () ? gen_reg_rtx (ptr_mode) : operands[0];
>> --
>> 2.27.0
>>