diff mbox series

[v2] aarch64: Add pattern for bswap + rotate [PR 110039]

Message ID 20230531131348.1392914-1-christophe.lyon@linaro.org
State Committed
Commit 070d651c6db37c3658be0a5274f44265045428e6
Headers
Series [v2] aarch64: Add pattern for bswap + rotate [PR 110039] |

Commit Message

Christophe Lyon May 31, 2023, 1:13 p.m. UTC 
  After commit g:d8545fb2c71683f407bfd96706103297d4d6e27b, we missed a
pattern to match the new GIMPLE form.

With this patch, gcc.target/aarch64/rev16_2.c passes again.

2023-05-31  Christophe Lyon  <christophe.lyon@linaro.org>

	PR target/110039
	gcc/
	* config/aarch64/aarch64.md (aarch64_rev16si2_alt3): New
	pattern.
---
 gcc/config/aarch64/aarch64.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

Comments

Richard Sandiford May 31, 2023, 1:15 p.m. UTC | #1 
Christophe Lyon <christophe.lyon@linaro.org> writes:
> After commit g:d8545fb2c71683f407bfd96706103297d4d6e27b, we missed a
> pattern to match the new GIMPLE form.
>
> With this patch, gcc.target/aarch64/rev16_2.c passes again.
>
> 2023-05-31  Christophe Lyon  <christophe.lyon@linaro.org>
>
> 	PR target/110039
> 	gcc/
> 	* config/aarch64/aarch64.md (aarch64_rev16si2_alt3): New
> 	pattern.

OK, thanks.

Richard

> ---
>  gcc/config/aarch64/aarch64.md | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
> index 8b8951d7b14..9af7024da43 100644
> --- a/gcc/config/aarch64/aarch64.md
> +++ b/gcc/config/aarch64/aarch64.md
> @@ -6267,6 +6267,16 @@
>    [(set_attr "type" "rev")]
>  )
>  
> +;; Similar pattern to match (rotate (bswap) 16)
> +(define_insn "aarch64_rev16si2_alt3"
> +  [(set (match_operand:SI 0 "register_operand" "=r")
> +        (rotate:SI (bswap:SI (match_operand:SI 1 "register_operand" "r"))
> +                   (const_int 16)))]
> +  ""
> +  "rev16\\t%w0, %w1"
> +  [(set_attr "type" "rev")]
> +)
> +
>  ;; zero_extend version of above
>  (define_insn "*bswapsi2_uxtw"
>    [(set (match_operand:DI 0 "register_operand" "=r")
diff mbox series

Patch

diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 8b8951d7b14..9af7024da43 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -6267,6 +6267,16 @@ 
   [(set_attr "type" "rev")]
 )
 
+;; Similar pattern to match (rotate (bswap) 16)
+(define_insn "aarch64_rev16si2_alt3"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (rotate:SI (bswap:SI (match_operand:SI 1 "register_operand" "r"))
+                   (const_int 16)))]
+  ""
+  "rev16\\t%w0, %w1"
+  [(set_attr "type" "rev")]
+)
+
 ;; zero_extend version of above
 (define_insn "*bswapsi2_uxtw"
   [(set (match_operand:DI 0 "register_operand" "=r")