aarch64: Remove redundant builtins code

aarch64_builtin_vectorized_function handles some built-in functions
that already have equivalent internal functions.  This seems to be
redundant now, since the target builtins that it chooses are mapped
to the same optab patterns as the internal functions.

gcc/
	* config/aarch64/aarch64-builtins.cc
	(aarch64_builtin_vectorized_function): Remove handling of
	floor, ceil, trunc, round, nearbyint, sqrt, clz and ctz.

gcc/testsuite/
	* gcc.target/aarch64/vect_unary_1.c: New test.

gcc/config/aarch64/aarch64-builtins.cc

@@ -2581,38 +2581,6 @@ aarch64_builtin_vectorized_function (unsigned int fn, tree type_out,
   switch (fn)
     {
 #undef AARCH64_CHECK_BUILTIN_MODE
-#define AARCH64_CHECK_BUILTIN_MODE(C, N) \
-  (out_mode == V##C##N##Fmode && in_mode == V##C##N##Fmode)
-    CASE_CFN_FLOOR:
-      return AARCH64_FIND_FRINT_VARIANT (floor);
-    CASE_CFN_CEIL:
-      return AARCH64_FIND_FRINT_VARIANT (ceil);
-    CASE_CFN_TRUNC:
-      return AARCH64_FIND_FRINT_VARIANT (btrunc);
-    CASE_CFN_ROUND:
-      return AARCH64_FIND_FRINT_VARIANT (round);
-    CASE_CFN_NEARBYINT:
-      return AARCH64_FIND_FRINT_VARIANT (nearbyint);
-    CASE_CFN_SQRT:
-      return AARCH64_FIND_FRINT_VARIANT (sqrt);
-#undef AARCH64_CHECK_BUILTIN_MODE
-#define AARCH64_CHECK_BUILTIN_MODE(C, N) \
-  (out_mode == V##C##SImode && in_mode == V##C##N##Imode)
-    CASE_CFN_CLZ:
-      {
-	if (AARCH64_CHECK_BUILTIN_MODE (4, S))
-	  return aarch64_builtin_decls[AARCH64_SIMD_BUILTIN_UNOP_clzv4si];
-	return NULL_TREE;
-      }
-    CASE_CFN_CTZ:
-      {
-	if (AARCH64_CHECK_BUILTIN_MODE (2, S))
-	  return aarch64_builtin_decls[AARCH64_SIMD_BUILTIN_UNOP_ctzv2si];
-	else if (AARCH64_CHECK_BUILTIN_MODE (4, S))
-	  return aarch64_builtin_decls[AARCH64_SIMD_BUILTIN_UNOP_ctzv4si];
-	return NULL_TREE;
-      }
-#undef AARCH64_CHECK_BUILTIN_MODE
 #define AARCH64_CHECK_BUILTIN_MODE(C, N) \
   (out_mode == V##C##N##Imode && in_mode == V##C##N##Fmode)
     CASE_CFN_IFLOOR:

gcc/testsuite/gcc.target/aarch64/vect_unary_1.c

@@ -0,0 +1,186 @@
+/* { dg-options "-O3 --save-temps" } */
+/* { dg-final { check-function-bodies "**" "" "" } } */
+
+#include <stdint.h>
+
+#define TEST2(OUT, NAME, IN)						\
+OUT __attribute__((vector_size(sizeof(OUT) * 2)))			\
+test2_##OUT##_##NAME##_##IN (float dummy,				\
+			     IN __attribute__((vector_size(sizeof(IN) * 2))) y) \
+{									\
+  OUT __attribute__((vector_size(sizeof(OUT) * 2))) x;			\
+  x[0] = __builtin_##NAME (y[0]);					\
+  x[1] = __builtin_##NAME (y[1]);					\
+  return x;								\
+}									\
+
+#define TEST4(OUT, NAME, IN)						\
+OUT __attribute__((vector_size(16)))					\
+test4_##OUT##_##NAME##_##IN (float dummy,				\
+			     IN __attribute__((vector_size(16))) y)	\
+{									\
+  OUT __attribute__((vector_size(16))) x;				\
+  x[0] = __builtin_##NAME (y[0]);					\
+  x[1] = __builtin_##NAME (y[1]);					\
+  x[2] = __builtin_##NAME (y[2]);					\
+  x[3] = __builtin_##NAME (y[3]);					\
+  return x;								\
+}									\
+
+/*
+** test2_float_truncf_float:
+**	frintz	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (float, truncf, float)
+
+/*
+** test2_double_trunc_double:
+**	frintz	v0.2d, v1.2d
+**	ret
+*/
+TEST2 (double, trunc, double)
+
+/*
+** test4_float_truncf_float:
+**	frintz	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (float, truncf, float)
+
+/*
+** test2_float_roundf_float:
+**	frinta	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (float, roundf, float)
+
+/*
+** test2_double_round_double:
+**	frinta	v0.2d, v1.2d
+**	ret
+*/
+TEST2 (double, round, double)
+
+/*
+** test4_float_roundf_float:
+**	frinta	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (float, roundf, float)
+
+/*
+** test2_float_nearbyintf_float:
+**	frinti	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (float, nearbyintf, float)
+
+/*
+** test2_double_nearbyint_double:
+**	frinti	v0.2d, v1.2d
+**	ret
+*/
+TEST2 (double, nearbyint, double)
+
+/*
+** test4_float_nearbyintf_float:
+**	frinti	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (float, nearbyintf, float)
+
+/*
+** test2_float_floorf_float:
+**	frintm	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (float, floorf, float)
+
+/*
+** test2_double_floor_double:
+**	frintm	v0.2d, v1.2d
+**	ret
+*/
+TEST2 (double, floor, double)
+
+/*
+** test4_float_floorf_float:
+**	frintm	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (float, floorf, float)
+
+/*
+** test2_float_ceilf_float:
+**	frintp	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (float, ceilf, float)
+
+/*
+** test2_double_ceil_double:
+**	frintp	v0.2d, v1.2d
+**	ret
+*/
+TEST2 (double, ceil, double)
+
+/*
+** test4_float_ceilf_float:
+**	frintp	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (float, ceilf, float)
+
+/*
+** test2_float_rintf_float:
+**	frintx	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (float, rintf, float)
+
+/*
+** test2_double_rint_double:
+**	frintx	v0.2d, v1.2d
+**	ret
+*/
+TEST2 (double, rint, double)
+
+/*
+** test4_float_rintf_float:
+**	frintx	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (float, rintf, float)
+
+/*
+** test2_int_clz_int:
+**	clz	v0.2s, v1.2s
+**	ret
+*/
+TEST2 (int, clz, int)
+
+/*
+** test4_int_clz_int:
+**	clz	v0.4s, v1.4s
+**	ret
+*/
+TEST4 (int, clz, int)
+
+/*
+** test2_int_ctz_int:
+**	rev32	(v[0-9]+).8b, v1.8b
+**	rbit	(v[0-9]+).8b, \1.8b
+**	clz	v0.2s, \2.2s
+**	ret
+*/
+TEST2 (int, ctz, int)
+
+/*
+** test4_int_ctz_int:
+**	rev32	(v[0-9]+).16b, v1.16b
+**	rbit	(v[0-9]+).16b, \1.16b
+**	clz	v0.4s, \2.4s
+**	ret
+*/
+TEST4 (int, ctz, int)