rs6000: Sanitize vector modes

This removes the vector modes that were only used by SPE.  It also
rearranges things so it is easier to see what is there, and for what.


	* config/rs6000/rs6000-modes.def: Remove all 8-byte vector modes
	except V2SF and V2SI.  Rearrange the vector modes, and add comments.
	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Remove V8QImode
	and V4HImode.
	(reg_offset_addressing_ok_p): Remove V4HImode and V1DImode.
	(rs6000_legitimate_offset_address_p): Ditto.
	(rs6000_emit_move): Ditto.
	(rs6000_init_builtins): Remove V4HI_type_node.

From-SVN: r249162

gcc/ChangeLog

+2017-06-13  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* config/rs6000/rs6000-modes.def: Remove all 8-byte vector modes
+	except V2SF and V2SI.  Rearrange the vector modes, and add comments.
+	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Remove V8QImode
+	and V4HImode.
+	(reg_offset_addressing_ok_p): Remove V4HImode and V1DImode.
+	(rs6000_legitimate_offset_address_p): Ditto.
+	(rs6000_emit_move): Ditto.
+	(rs6000_init_builtins): Remove V4HI_type_node.
+
 2017-06-13  Martin Liska  <mliska@suse.cz>
 
 	PR sanitize/78204

gcc/config/rs6000/rs6000-modes.def

@@ -41,15 +41,20 @@ CC_MODE (CCFP);
 CC_MODE (CCEQ);
 
 /* Vector modes.  */
-VECTOR_MODES (INT, 8);        /*       V8QI  V4HI V2SI */
+
+/* VMX/VSX.  */
 VECTOR_MODES (INT, 16);       /* V16QI V8HI  V4SI V2DI */
-VECTOR_MODES (INT, 32);       /* V32QI V16HI V8SI V4DI */
-VECTOR_MODE (INT, DI, 1);
-VECTOR_MODE (INT, TI, 1);
-VECTOR_MODES (FLOAT, 8);      /*             V4HF V2SF */
+VECTOR_MODE (INT, TI, 1);     /*                  V1TI */
 VECTOR_MODES (FLOAT, 16);     /*       V8HF  V4SF V2DF */
+
+/* Two VMX/VSX vectors (for permute, select, concat, etc.)  */
+VECTOR_MODES (INT, 32);       /* V32QI V16HI V8SI V4DI */
 VECTOR_MODES (FLOAT, 32);     /*       V16HF V8SF V4DF */
 
+/* Paired single.  */
+VECTOR_MODE (FLOAT, SF, 2);   /* The only valid paired-single mode.  */
+VECTOR_MODE (INT, SI, 2);     /* For paired-single permutes.  */
+
 /* Replacement for TImode that only is allowed in GPRs.  We also use PTImode
    for quad memory atomic operations to force getting an even/odd register
    combination.  */

gcc/config/rs6000/rs6000.c

@@ -2450,8 +2450,6 @@ rs6000_debug_reg_global (void)
     SDmode,
     DDmode,
     TDmode,
-    V8QImode,
-    V4HImode,
     V2SImode,
     V16QImode,
     V8HImode,
@@ -8490,9 +8488,7 @@ reg_offset_addressing_ok_p (machine_mode mode)
 	return mode_supports_vsx_dform_quad (mode);
       break;
 
-    case V4HImode:
     case V2SImode:
-    case V1DImode:
     case V2SFmode:
        /* Paired vector modes.  Only reg+reg addressing is valid.  */
       if (TARGET_PAIRED_FLOAT)
@@ -8730,9 +8726,7 @@ rs6000_legitimate_offset_address_p (machine_mode mode, rtx x,
   extra = 0;
   switch (mode)
     {
-    case V4HImode:
     case V2SImode:
-    case V1DImode:
     case V2SFmode:
       /* SPE vector modes.  */
       return SPE_CONST_OFFSET_OK (offset);
@@ -10981,10 +10975,8 @@ rs6000_emit_move (rtx dest, rtx source, machine_mode mode)
     case V8HImode:
     case V4SFmode:
     case V4SImode:
-    case V4HImode:
     case V2SFmode:
     case V2SImode:
-    case V1DImode:
     case V2DFmode:
     case V2DImode:
     case V1TImode:
@@ -16843,7 +16835,6 @@ rs6000_init_builtins (void)
 				       : "__vector long long",
 				       intDI_type_node, 2);
   V2DF_type_node = rs6000_vector_type ("__vector double", double_type_node, 2);
-  V4HI_type_node = build_vector_type (intHI_type_node, 4);
   V4SI_type_node = rs6000_vector_type ("__vector signed int",
 				       intSI_type_node, 4);
   V4SF_type_node = rs6000_vector_type ("__vector float", float_type_node, 4);
@@ -16991,7 +16982,6 @@ rs6000_init_builtins (void)
   builtin_mode_to_type[V2DImode][0] = V2DI_type_node;
   builtin_mode_to_type[V2DImode][1] = unsigned_V2DI_type_node;
   builtin_mode_to_type[V2DFmode][0] = V2DF_type_node;
-  builtin_mode_to_type[V4HImode][0] = V4HI_type_node;
   builtin_mode_to_type[V4SImode][0] = V4SI_type_node;
   builtin_mode_to_type[V4SImode][1] = unsigned_V4SI_type_node;
   builtin_mode_to_type[V4SFmode][0] = V4SF_type_node;