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aarch64: Deduplicate bmask lowering rule (#5154)

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This commit is contained in:
Afonso Bordado
2022-10-31 19:44:35 +00:00
committed by GitHub
parent bb11e61d75
commit 04fa8951ba
1 changed files with 4 additions and 12 deletions
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16
cranelift/codegen/src/isa/aarch64/inst.isle
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@@ -3531,19 +3531,11 @@
(combined Reg (orr $I64 lo hi)))
(lower_bmask ty $I64 (value_reg combined))))
;; For converting from a smaller type into i128, duplicate the result of
;; For converting from any type into i128, duplicate the result of
;; converting to i64.
(rule 2
(lower_bmask $I128 (fits_in_64 ty) val)
(let ((res ValueRegs (lower_bmask $I64 ty val))
(res Reg (value_regs_get res 0)))
(value_regs res res)))
;; For conversions to a 128-bit mask, we duplicate the result of converting to
;; an I64.
(rule 3
(lower_bmask $I128 $I128 val)
(let ((res ValueRegs (lower_bmask $I64 $I128 val))
(lower_bmask $I128 in_ty val)
(let ((res ValueRegs (lower_bmask $I64 in_ty val))
(res Reg (value_regs_get res 0)))
(value_regs res res)))
@@ -3553,7 +3545,7 @@
;; and tmp, val, #ty_mask
;; cmp tmp, #0
;; csetm res, ne
(rule 4
(rule 3
(lower_bmask out_ty (fits_in_16 in_ty) val)
(let ((mask_bits ImmLogic (imm_logic_from_u64 $I32 (ty_mask in_ty)))
(masked Reg (and_imm $I32 (value_regs_get val 0) mask_bits)))