[Patch][GCC][AArch64] - Lower store and load neon builtins to gimple

[Patch][GCC][AArch64] - Lower store and load neon builtins to gimple

20-10-2021  Andre Vieira  <andre.simoesdiasvieira@arm.com>
	    Jirui Wu  <jirui.wu@arm.com>
gcc/ChangeLog:

	* config/aarch64/aarch64-builtins.c
	(aarch64_general_gimple_fold_builtin):
	lower vld1 and vst1 variants of the neon builtins
	* config/aarch64/aarch64-protos.h:
	(aarch64_general_gimple_fold_builtin): Add gsi parameter.
	* config/aarch64/aarch64.c (aarch64_general_gimple_fold_builtin):
	Likwise.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/fmla_intrinsic_1.c: prevent over optimization.
	* gcc.target/aarch64/fmls_intrinsic_1.c: Likewise.
	* gcc.target/aarch64/fmul_intrinsic_1.c: Likewise.
	* gcc.target/aarch64/mla_intrinsic_1.c: Likewise.
	* gcc.target/aarch64/mls_intrinsic_1.c: Likewise.
	* gcc.target/aarch64/mul_intrinsic_1.c: Likewise.
	* gcc.target/aarch64/simd/vmul_elem_1.c: Likewise.
	* gcc.target/aarch64/vclz.c: Likewise.
	* gcc.target/aarch64/vneg_s.c: Likewise.