On Wed, Aug 4, 2021 at 5:33 AM liuhongt <hongtao....@intel.com> wrote:
>
> Hi:
> The define_peephole2 which is added by r12-2640-gf7bf03cf69ccb7dc
> should only work on general registers, considering that x86 also
> supports mov instructions between gpr, sse reg, mask reg, limiting the
> peephole2 predicate to general_reg_operand.
> I failed to contruct a testcase, but I believe that the PR problem
> should be solved by this patch.
>
> Bootstrapped and regtested on x86_64-linux-gnu{-m32,}.
> Ok for trunk?
>
> gcc/ChangeLog:
>
> PR target/101743
> * config/i386/i386.md (peephole2): Refine predicate from
> register_operand to general_reg_operand.
OK.
Thanks,
Uros.
> ---
> gcc/config/i386/i386.md | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
> index 0c23ddb8d1f..51e8b475bca 100644
> --- a/gcc/config/i386/i386.md
> +++ b/gcc/config/i386/i386.md
> @@ -19423,11 +19423,11 @@ (define_peephole2
> ;; Eliminate a reg-reg mov by inverting the condition of a cmov (#1).
> ;; mov r0,r1; dec r0; mov r2,r3; cmov r0,r2 -> dec r1; mov r0,r3; cmov r0, r1
> (define_peephole2
> - [(set (match_operand:SWI248 0 "register_operand")
> - (match_operand:SWI248 1 "register_operand"))
> + [(set (match_operand:SWI248 0 "general_reg_operand")
> + (match_operand:SWI248 1 "general_reg_operand"))
> (parallel [(set (reg FLAGS_REG) (match_operand 5))
> (set (match_dup 0) (match_operand:SWI248 6))])
> - (set (match_operand:SWI248 2 "register_operand")
> + (set (match_operand:SWI248 2 "general_reg_operand")
> (match_operand:SWI248 3))
> (set (match_dup 0)
> (if_then_else:SWI248 (match_operator 4 "ix86_comparison_operator"
> @@ -19455,10 +19455,10 @@ (define_peephole2
> ;; Eliminate a reg-reg mov by inverting the condition of a cmov (#2).
> ;; mov r2,r3; mov r0,r1; dec r0; cmov r0,r2 -> dec r1; mov r0,r3; cmov r0, r1
> (define_peephole2
> - [(set (match_operand:SWI248 2 "register_operand")
> + [(set (match_operand:SWI248 2 "general_reg_operand")
> (match_operand:SWI248 3))
> - (set (match_operand:SWI248 0 "register_operand")
> - (match_operand:SWI248 1 "register_operand"))
> + (set (match_operand:SWI248 0 "general_reg_operand")
> + (match_operand:SWI248 1 "general_reg_operand"))
> (parallel [(set (reg FLAGS_REG) (match_operand 5))
> (set (match_dup 0) (match_operand:SWI248 6))])
> (set (match_dup 0)
> --
> 2.27.0
>
