gallium: Remove loop register file.

It was only used for D3D's REP/END/BGNFOR/ENDFOR. D3D's aL register is
just like another address register now.

src/gallium/auxiliary/tgsi/tgsi_dump.c

@@ -100,7 +100,6 @@ static const char *file_names[TGSI_FILE_COUNT] =
    "SAMP",
    "ADDR",
    "IMM",
-   "LOOP",
    "PRED",
    "SV"
 };

src/gallium/auxiliary/tgsi/tgsi_exec.c

@@ -1346,13 +1346,6 @@ store_dest(struct tgsi_exec_machine *mach,
       dst = &mach->Addrs[index].xyzw[chan_index];
       break;
 
-   case TGSI_FILE_LOOP:
-      assert(reg->Register.Index == 0);
-      assert(mach->LoopCounterStackTop > 0);
-      assert(chan_index == CHAN_X);
-      dst = &mach->LoopCounterStack[mach->LoopCounterStackTop - 1].xyzw[chan_index];
-      break;
-
    case TGSI_FILE_PREDICATE:
       index = reg->Register.Index;
       assert(index < TGSI_EXEC_NUM_PREDS);

src/gallium/auxiliary/tgsi/tgsi_exec.h

@@ -299,10 +299,6 @@ struct tgsi_exec_machine
    uint LoopLabelStack[TGSI_EXEC_MAX_LOOP_NESTING];
    int LoopLabelStackTop;
 
-   /** Loop counter stack (x = index, y = counter, z = step) */
-   struct tgsi_exec_vector LoopCounterStack[TGSI_EXEC_MAX_LOOP_NESTING];
-   int LoopCounterStackTop;
-   
    /** Loop continue mask stack (see comments in tgsi_exec.c) */
    uint ContStack[TGSI_EXEC_MAX_LOOP_NESTING];
    int ContStackTop;

src/gallium/auxiliary/tgsi/tgsi_sanity.c

@@ -235,8 +235,8 @@ static const char *file_names[TGSI_FILE_COUNT] =
    "SAMP",
    "ADDR",
    "IMM",
-   "LOOP",
-   "PRED"
+   "PRED",
+   "SV"
 };
 
 static boolean

src/gallium/auxiliary/tgsi/tgsi_text.c

@@ -278,7 +278,6 @@ static const char *file_names[TGSI_FILE_COUNT] =
    "SAMP",
    "ADDR",
    "IMM",
-   "LOOP",
    "PRED",
    "SV"
 };

src/gallium/auxiliary/tgsi/tgsi_ureg.c

@@ -74,7 +74,6 @@ struct ureg_tokens {
 #define UREG_MAX_IMMEDIATE 32
 #define UREG_MAX_TEMP 256
 #define UREG_MAX_ADDR 2
-#define UREG_MAX_LOOP 1
 #define UREG_MAX_PRED 1
 
 struct const_decl {
@@ -151,7 +150,6 @@ struct ureg_program
 
    unsigned nr_addrs;
    unsigned nr_preds;
-   unsigned nr_loops;
    unsigned nr_instructions;
 
    struct ureg_tokens domain[2];
@@ -537,19 +535,6 @@ struct ureg_dst ureg_DECL_address( struct ureg_program *ureg )
    return ureg_dst_register( TGSI_FILE_ADDRESS, 0 );
 }
 
-/* Allocate a new loop register.
- */
-struct ureg_dst
-ureg_DECL_loop(struct ureg_program *ureg)
-{
-   if (ureg->nr_loops < UREG_MAX_LOOP) {
-      return ureg_dst_register(TGSI_FILE_LOOP, ureg->nr_loops++);
-   }
-
-   assert(0);
-   return ureg_dst_register(TGSI_FILE_LOOP, 0);
-}
-
 /* Allocate a new predicate register.
  */
 struct ureg_dst
@@ -1356,13 +1341,6 @@ static void emit_decls( struct ureg_program *ureg )
                        0, ureg->nr_addrs );
    }
 
-   if (ureg->nr_loops) {
-      emit_decl_range(ureg,
-                      TGSI_FILE_LOOP,
-                      0,
-                      ureg->nr_loops);
-   }
-
    if (ureg->nr_preds) {
       emit_decl_range(ureg,
                       TGSI_FILE_PREDICATE,

src/gallium/auxiliary/tgsi/tgsi_ureg.h

@@ -230,9 +230,6 @@ ureg_release_temporary( struct ureg_program *ureg,
 struct ureg_dst
 ureg_DECL_address( struct ureg_program * );
 
-struct ureg_dst
-ureg_DECL_loop( struct ureg_program * );
-
 struct ureg_dst
 ureg_DECL_predicate(struct ureg_program *);
 

src/gallium/drivers/i965/brw_wm_debug.c

@@ -202,7 +202,8 @@ static const char *file_strings[TGSI_FILE_COUNT+1] = {
    "SAMPLER",
    "ADDR",
    "IMM",
-   "LOOP",
+   "PRED",
+   "SV",
    "PAYLOAD"
 };
 

src/gallium/include/pipe/p_shader_tokens.h

@@ -73,9 +73,8 @@ enum tgsi_file_type {
    TGSI_FILE_SAMPLER      =5,
    TGSI_FILE_ADDRESS      =6,
    TGSI_FILE_IMMEDIATE    =7,
-   TGSI_FILE_LOOP         =8,
-   TGSI_FILE_PREDICATE    =9,
-   TGSI_FILE_SYSTEM_VALUE =10,
+   TGSI_FILE_PREDICATE    =8,
+   TGSI_FILE_SYSTEM_VALUE =9,
    TGSI_FILE_COUNT      /**< how many TGSI_FILE_ types */
 };