On Thu, Nov 11, 2021 at 12:25 PM Kewen Lin <li...@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,
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
>
