[PATCH 13/13] rs6000, remove vector set and vector init built-ins.

[Carl Love <cel@linux.ibm.com>]

rs6000, remove vector set and vector init built-ins.

The vector init built-ins:

  __builtin_vec_init_v16qi, __builtin_vec_init_v8hi,
  __builtin_vec_init_v4si, __builtin_vec_init_v4sf,
  __builtin_vec_init_v2di, __builtin_vec_init_v2df,
  __builtin_vec_set_v1ti

perform the same operation as initializing the vector in C code.  For
example:

  result_v4si = __builtin_vec_init_v4si (1, 2, 3, 4);
  result_v4si = {1, 2, 3, 4};

These two constructs were tested and verified they generate identical
assembly instructions with no optimization and -O3 optimization.

The vector set built-ins:

  __builtin_vec_set_v16qi, __builtin_vec_set_v8hi.
  __builtin_vec_set_v4si, __builtin_vec_set_v4sf

perform the same operation as setting a specific element in the vector in
C code.  For example:

  src_v4si = __builtin_vec_set_v4si (src_v4si, int_val, index);
  src_v4si[index] = int_val;

The built-in actually generates more instructions than the inline C code
with no optimization but is identical with -O3 optimizations.

All of the above built-ins that are removed do not have test cases and
are not documented.

Built-ins   __builtin_vec_set_v1ti __builtin_vec_set_v2di,
__builtin_vec_set_v2df are not removed as they are used in function
resolve_vec_insert() in file rs6000-c.cc.

The built-ins are removed as they don't provide any benefit over just
using C code.

gcc/ChangeLog:
	* config/rs6000/rs6000-builtins.def (__builtin_vec_init_v16qi,
	 __builtin_vec_init_v8hi, __builtin_vec_init_v4si,
	__builtin_vec_init_v4sf, __builtin_vec_init_v2di,
	__builtin_vec_init_v2df, __builtin_vec_set_v1ti,
	__builtin_vec_set_v16qi, __builtin_vec_set_v8hi.
	__builtin_vec_set_v4si, __builtin_vec_set_v4sf,
	__builtin_vec_set_v2di, __builtin_vec_set_v2df,
	__builtin_vec_set_v1ti): Remove built-in definitions.
---
 gcc/config/rs6000/rs6000-builtins.def | 42 ++-------------------------
 1 file changed, 2 insertions(+), 40 deletions(-)

diff --git a/gcc/config/rs6000/rs6000-builtins.def b/gcc/config/rs6000/rs6000-builtins.def
index 19d05b8043a..d04ad4ce7e5 100644
--- a/gcc/config/rs6000/rs6000-builtins.def
+++ b/gcc/config/rs6000/rs6000-builtins.def
@@ -1115,37 +1115,6 @@
   const signed short __builtin_vec_ext_v8hi (vss, signed int);
     VEC_EXT_V8HI nothing {extract}
 
-  const vsc __builtin_vec_init_v16qi (signed char, signed char, signed char, \
-            signed char, signed char, signed char, signed char, signed char, \
-            signed char, signed char, signed char, signed char, signed char, \
-            signed char, signed char, signed char);
-    VEC_INIT_V16QI nothing {init}
-
-  const vf __builtin_vec_init_v4sf (float, float, float, float);
-    VEC_INIT_V4SF nothing {init}
-
-  const vsi __builtin_vec_init_v4si (signed int, signed int, signed int, \
-                                     signed int);
-    VEC_INIT_V4SI nothing {init}
-
-  const vss __builtin_vec_init_v8hi (signed short, signed short, signed short,\
-             signed short, signed short, signed short, signed short, \
-             signed short);
-    VEC_INIT_V8HI nothing {init}
-
-  const vsc __builtin_vec_set_v16qi (vsc, signed char, const int<4>);
-    VEC_SET_V16QI nothing {set}
-
-  const vf __builtin_vec_set_v4sf (vf, float, const int<2>);
-    VEC_SET_V4SF nothing {set}
-
-  const vsi __builtin_vec_set_v4si (vsi, signed int, const int<2>);
-    VEC_SET_V4SI nothing {set}
-
-  const vss __builtin_vec_set_v8hi (vss, signed short, const int<3>);
-    VEC_SET_V8HI nothing {set}
-
-
 ; Cell builtins.
 [cell]
   pure vsc __builtin_altivec_lvlx (signed long, const void *);
@@ -1292,15 +1261,8 @@
   const signed long long __builtin_vec_ext_v2di (vsll, signed int);
     VEC_EXT_V2DI nothing {extract}
 
-  const vsq __builtin_vec_init_v1ti (signed __int128);
-    VEC_INIT_V1TI nothing {init}
-
-  const vd __builtin_vec_init_v2df (double, double);
-    VEC_INIT_V2DF nothing {init}
-
-  const vsll __builtin_vec_init_v2di (signed long long, signed long long);
-    VEC_INIT_V2DI nothing {init}
-
+;; VEC_SET_V1TI, VEC_SET_V2DF and VEC_SET_V2DI are used in
+;; resolve_vec_insert(), rs6000-c.cc
   const vsq __builtin_vec_set_v1ti (vsq, signed __int128, const int<0,0>);
     VEC_SET_V1TI nothing {set}
 
-- 
2.44.0