aarch64: Use memcpy to copy vector tables in vqtbl[234] intrinsics

Use __builtin_memcpy to copy vector structures instead of building
a new opaque structure one vector at a time in each of the vqtbl[234]
Neon intrinsics in arm_neon.h. This simplifies the header file and
also improves code generation - superfluous move instructions were
emitted for every register extraction/set in this additional
structure.

Add new code generation tests to verify that superfluous move
instructions are no longer generated for the vqtbl[234] intrinsics.

gcc/ChangeLog:

2021-07-08  Jonathan Wright  <jonathan.wright@arm.com>

	* config/aarch64/arm_neon.h (vqtbl2_s8): Use __builtin_memcpy
	instead of constructing __builtin_aarch64_simd_oi one vector
	at a time.
	(vqtbl2_u8): Likewise.
	(vqtbl2_p8): Likewise.
	(vqtbl2q_s8): Likewise.
	(vqtbl2q_u8): Likewise.
	(vqtbl2q_p8): Likewise.
	(vqtbl3_s8): Use __builtin_memcpy instead of constructing
	__builtin_aarch64_simd_ci one vector at a time.
	(vqtbl3_u8): Likewise.
	(vqtbl3_p8): Likewise.
	(vqtbl3q_s8): Likewise.
	(vqtbl3q_u8): Likewise.
	(vqtbl3q_p8): Likewise.
	(vqtbl4_s8): Use __builtin_memcpy instead of constructing
	__builtin_aarch64_simd_xi one vector at a time.
	(vqtbl4_u8): Likewise.
	(vqtbl4_p8): Likewise.
	(vqtbl4q_s8): Likewise.
	(vqtbl4q_u8): Likewise.
	(vqtbl4q_p8): Likewise.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/vector_structure_intrinsics.c: New test.

0 files changed, 0 insertions, 0 deletions