[PATCH] aarch64: Use type-qualified builtins for ADDV Neon intrinsics

[Jonathan Wright <Jonathan.Wright@arm.com>]

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Hi,

This patch declares unsigned type-qualified builtins and uses them to
implement the vector reduction Neon intrinsics. This removes the need
for many casts in arm_neon.h.

Regression tested and bootstrapped on aarch64-none-linux-gnu - no
issues.

Ok for master?

Thanks,
Jonathan

---

gcc/ChangeLog:

2021-11-09  Jonathan Wright  <jonathan.wright@arm.com>

	* config/aarch64/aarch64-simd-builtins.def: Declare unsigned
	builtins for vector reduction.
	* config/aarch64/arm_neon.h (vaddv_u8): Use type-qualified
	builtin and remove casts.
	(vaddv_u16): Likewise.
	(vaddv_u32): Likewise.
	(vaddvq_u8): Likewise.
	(vaddvq_u16): Likewise.
	(vaddvq_u32): Likewise.
	(vaddvq_u64): Likewise.

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diff --git a/gcc/config/aarch64/aarch64-simd-builtins.def b/gcc/config/aarch64/aarch64-simd-builtins.def
index 7d6de6728cf7c63872e09850a394101f7abf21d4..35a099e1fb8dd1acb9e35583d1267df257d961b0 100644
--- a/gcc/config/aarch64/aarch64-simd-builtins.def
+++ b/gcc/config/aarch64/aarch64-simd-builtins.def
@@ -513,6 +513,7 @@
 
   /* Implemented by aarch64_reduc_plus_<mode>.  */
   BUILTIN_VALL (UNOP, reduc_plus_scal_, 10, NONE)
+  BUILTIN_VDQ_I (UNOPU, reduc_plus_scal_, 10, NONE)
 
   /* Implemented by reduc_<maxmin_uns>_scal_<mode> (producing scalar).  */
   BUILTIN_VDQIF_F16 (UNOP, reduc_smax_scal_, 10, NONE)
diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h
index ab46897d784b81bec9654d87557640ca4c1e5681..3c03432b5b6c6cd0f349671366615925d38121e5 100644
--- a/gcc/config/aarch64/arm_neon.h
+++ b/gcc/config/aarch64/arm_neon.h
@@ -9695,21 +9695,21 @@ __extension__ extern __inline uint8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddv_u8 (uint8x8_t __a)
 {
-  return (uint8_t) __builtin_aarch64_reduc_plus_scal_v8qi ((int8x8_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v8qi_uu (__a);
 }
 
 __extension__ extern __inline uint16_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddv_u16 (uint16x4_t __a)
 {
-  return (uint16_t) __builtin_aarch64_reduc_plus_scal_v4hi ((int16x4_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v4hi_uu (__a);
 }
 
 __extension__ extern __inline uint32_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddv_u32 (uint32x2_t __a)
 {
-  return (int32_t) __builtin_aarch64_reduc_plus_scal_v2si ((int32x2_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v2si_uu (__a);
 }
 
 __extension__ extern __inline int8_t
@@ -9744,28 +9744,28 @@ __extension__ extern __inline uint8_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddvq_u8 (uint8x16_t __a)
 {
-  return (uint8_t) __builtin_aarch64_reduc_plus_scal_v16qi ((int8x16_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v16qi_uu (__a);
 }
 
 __extension__ extern __inline uint16_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddvq_u16 (uint16x8_t __a)
 {
-  return (uint16_t) __builtin_aarch64_reduc_plus_scal_v8hi ((int16x8_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v8hi_uu (__a);
 }
 
 __extension__ extern __inline uint32_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddvq_u32 (uint32x4_t __a)
 {
-  return (uint32_t) __builtin_aarch64_reduc_plus_scal_v4si ((int32x4_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v4si_uu (__a);
 }
 
 __extension__ extern __inline uint64_t
 __attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
 vaddvq_u64 (uint64x2_t __a)
 {
-  return (uint64_t) __builtin_aarch64_reduc_plus_scal_v2di ((int64x2_t) __a);
+  return __builtin_aarch64_reduc_plus_scal_v2di_uu (__a);
 }
 
 __extension__ extern __inline float32_t