aarch64: Use correct type attributes for RTL generating XTN(2)

Use the correct "neon_move_narrow_q" type attribute in RTL patterns
that generate XTN/XTN2 instructions.

This makes a material difference because these instructions can be
executed on both SIMD pipes in the Cortex-A57 core model, whereas the
"neon_shift_imm_narrow_q" attribute (in use until now) would suggest
to the scheduler that they could only execute on one of the two
pipes.

gcc/ChangeLog:

2021-05-18  Jonathan Wright  <jonathan.wright@arm.com>

	* config/aarch64/aarch64-simd.md: Use "neon_move_narrow_q"
	type attribute in patterns generating XTN(2).

diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index 447b5575f2f5adbad4957e90787a4954af644b20..e750faed1dbd940cdfa216d858b98f3bc25bba42 100644 (file)
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -1697,7 +1697,7 @@
        (truncate:<VNARROWQ> (match_operand:VQN 1 "register_operand" "w")))]
   "TARGET_SIMD"
   "xtn\\t%0.<Vntype>, %1.<Vtype>"
-  [(set_attr "type" "neon_shift_imm_narrow_q")]
+  [(set_attr "type" "neon_move_narrow_q")]
 )
 
 (define_insn "aarch64_xtn2<mode>_le"
@@ -1707,7 +1707,7 @@
          (truncate:<VNARROWQ> (match_operand:VQN 2 "register_operand" "w"))))]
   "TARGET_SIMD && !BYTES_BIG_ENDIAN"
   "xtn2\t%0.<V2ntype>, %2.<Vtype>"
-  [(set_attr "type" "neon_shift_imm_narrow_q")]
+  [(set_attr "type" "neon_move_narrow_q")]
 )
 
 (define_insn "aarch64_xtn2<mode>_be"
@@ -1717,7 +1717,7 @@
          (match_operand:<VNARROWQ> 1 "register_operand" "0")))]
   "TARGET_SIMD && BYTES_BIG_ENDIAN"
   "xtn2\t%0.<V2ntype>, %2.<Vtype>"
-  [(set_attr "type" "neon_shift_imm_narrow_q")]
+  [(set_attr "type" "neon_move_narrow_q")]
 )
 
 (define_expand "aarch64_xtn2<mode>"
@@ -8618,7 +8618,7 @@
        (truncate:<VNARROWQ> (match_operand:VQN 1 "register_operand" "w")))]
   "TARGET_SIMD"
   "xtn\t%0.<Vntype>, %1.<Vtype>"
-  [(set_attr "type" "neon_shift_imm_narrow_q")]
+  [(set_attr "type" "neon_move_narrow_q")]
 )
 
 (define_insn "aarch64_bfdot<mode>"