Updated to mesalib 7.9

1 files changed, 0 insertions, 1035 deletions

diff --git a/mesalib/src/mesa/shader/prog_optimize.c b/mesalib/src/mesa/shader/prog_optimize.c
deleted file mode 100644
index 2941a17da..000000000
--- a/mesalib/src/mesa/shader/prog_optimize.c
+++ /dev/null
@@ -1,1035 +0,0 @@
-/*
- * Mesa 3-D graphics library
- * Version:  7.5
- *
- * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-
-
-#include "main/glheader.h"
-#include "main/context.h"
-#include "main/macros.h"
-#include "program.h"
-#include "prog_instruction.h"
-#include "prog_optimize.h"
-#include "prog_print.h"
-
-
-#define MAX_LOOP_NESTING 50
-
-
-static GLboolean dbg = GL_FALSE;
-
-/* Returns the mask of channels read from the given srcreg in this instruction.
- */
-static GLuint
-get_src_arg_mask(const struct prog_instruction *inst, int arg)
-{
-   int writemask = inst->DstReg.WriteMask;
-
-   if (inst->CondUpdate)
-      writemask = WRITEMASK_XYZW;
-
-   switch (inst->Opcode) {
-   case OPCODE_MOV:
-   case OPCODE_ABS:
-   case OPCODE_ADD:
-   case OPCODE_MUL:
-   case OPCODE_SUB:
-      return writemask;
-   case OPCODE_RCP:
-   case OPCODE_SIN:
-   case OPCODE_COS:
-   case OPCODE_RSQ:
-   case OPCODE_POW:
-   case OPCODE_EX2:
-      return WRITEMASK_X;
-   case OPCODE_DP2:
-      return WRITEMASK_XY;
-   case OPCODE_DP3:
-   case OPCODE_XPD:
-      return WRITEMASK_XYZ;
-   default:
-      return WRITEMASK_XYZW;
-   }
-}
-
-/**
- * In 'prog' remove instruction[i] if removeFlags[i] == TRUE.
- * \return number of instructions removed
- */
-static GLuint
-remove_instructions(struct gl_program *prog, const GLboolean *removeFlags)
-{
-   GLint i, removeEnd = 0, removeCount = 0;
-   GLuint totalRemoved = 0;
-
-   /* go backward */
-   for (i = prog->NumInstructions - 1; i >= 0; i--) {
-      if (removeFlags[i]) {
-         totalRemoved++;
-         if (removeCount == 0) {
-            /* begin a run of instructions to remove */
-            removeEnd = i;
-            removeCount = 1;
-         }
-         else {
-            /* extend the run of instructions to remove */
-            removeCount++;
-         }
-      }
-      else {
-         /* don't remove this instruction, but check if the preceeding
-          * instructions are to be removed.
-          */
-         if (removeCount > 0) {
-            GLint removeStart = removeEnd - removeCount + 1;
-            _mesa_delete_instructions(prog, removeStart, removeCount);
-            removeStart = removeCount = 0; /* reset removal info */
-         }
-      }
-   }
-   /* Finish removing if the first instruction was to be removed. */
-   if (removeCount > 0) {
-      GLint removeStart = removeEnd - removeCount + 1;
-      _mesa_delete_instructions(prog, removeStart, removeCount);
-   }
-   return totalRemoved;
-}
-
-
-/**
- * Remap register indexes according to map.
- * \param prog  the program to search/replace
- * \param file  the type of register file to search/replace
- * \param map  maps old register indexes to new indexes
- */
-static void
-replace_regs(struct gl_program *prog, gl_register_file file, const GLint map[])
-{
-   GLuint i;
-
-   for (i = 0; i < prog->NumInstructions; i++) {
-      struct prog_instruction *inst = prog->Instructions + i;
-      const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
-      GLuint j;
-      for (j = 0; j < numSrc; j++) {
-         if (inst->SrcReg[j].File == file) {
-            GLuint index = inst->SrcReg[j].Index;
-            ASSERT(map[index] >= 0);
-            inst->SrcReg[j].Index = map[index];
-         }
-      }
-      if (inst->DstReg.File == file) {
-         const GLuint index = inst->DstReg.Index;
-         ASSERT(map[index] >= 0);
-         inst->DstReg.Index = map[index];
-      }
-   }
-}
-
-
-/**
- * Consolidate temporary registers to use low numbers.  For example, if the
- * shader only uses temps 4, 5, 8, replace them with 0, 1, 2.
- */
-static void
-_mesa_consolidate_registers(struct gl_program *prog)
-{
-   GLboolean tempUsed[MAX_PROGRAM_TEMPS];
-   GLint tempMap[MAX_PROGRAM_TEMPS];
-   GLuint tempMax = 0, i;
-
-   if (dbg) {
-      printf("Optimize: Begin register consolidation\n");
-   }
-
-   memset(tempUsed, 0, sizeof(tempUsed));
-
-   for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
-      tempMap[i] = -1;
-   }
-
-   /* set tempUsed[i] if temporary [i] is referenced */
-   for (i = 0; i < prog->NumInstructions; i++) {
-      const struct prog_instruction *inst = prog->Instructions + i;
-      const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
-      GLuint j;
-      for (j = 0; j < numSrc; j++) {
-         if (inst->SrcReg[j].File == PROGRAM_TEMPORARY) {
-            const GLuint index = inst->SrcReg[j].Index;
-            ASSERT(index < MAX_PROGRAM_TEMPS);
-            tempUsed[index] = GL_TRUE;
-            tempMax = MAX2(tempMax, index);
-            break;
-         }
-      }
-      if (inst->DstReg.File == PROGRAM_TEMPORARY) {
-         const GLuint index = inst->DstReg.Index;
-         ASSERT(index < MAX_PROGRAM_TEMPS);
-         tempUsed[index] = GL_TRUE;
-         tempMax = MAX2(tempMax, index);
-      }
-   }
-
-   /* allocate a new index for each temp that's used */
-   {
-      GLuint freeTemp = 0;
-      for (i = 0; i <= tempMax; i++) {
-         if (tempUsed[i]) {
-            tempMap[i] = freeTemp++;
-            /*printf("replace %u with %u\n", i, tempMap[i]);*/
-         }
-      }
-      if (freeTemp == tempMax + 1) {
-         /* no consolidation possible */
-         return;
-      }         
-      if (dbg) {
-         printf("Replace regs 0..%u with 0..%u\n", tempMax, freeTemp-1);
-      }
-   }
-
-   replace_regs(prog, PROGRAM_TEMPORARY, tempMap);
-
-   if (dbg) {
-      printf("Optimize: End register consolidation\n");
-   }
-}
-
-
-/**
- * Remove dead instructions from the given program.
- * This is very primitive for now.  Basically look for temp registers
- * that are written to but never read.  Remove any instructions that
- * write to such registers.  Be careful with condition code setters.
- */
-static void
-_mesa_remove_dead_code(struct gl_program *prog)
-{
-   GLboolean tempRead[MAX_PROGRAM_TEMPS][4];
-   GLboolean *removeInst; /* per-instruction removal flag */
-   GLuint i, rem = 0, comp;
-
-   memset(tempRead, 0, sizeof(tempRead));
-
-   if (dbg) {
-      printf("Optimize: Begin dead code removal\n");
-      /*_mesa_print_program(prog);*/
-   }
-
-   removeInst = (GLboolean *)
-      calloc(1, prog->NumInstructions * sizeof(GLboolean));
-
-   /* Determine which temps are read and written */
-   for (i = 0; i < prog->NumInstructions; i++) {
-      const struct prog_instruction *inst = prog->Instructions + i;
-      const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
-      GLuint j;
-
-      /* check src regs */
-      for (j = 0; j < numSrc; j++) {
-         if (inst->SrcReg[j].File == PROGRAM_TEMPORARY) {
-            const GLuint index = inst->SrcReg[j].Index;
-            GLuint read_mask;
-            ASSERT(index < MAX_PROGRAM_TEMPS);
-	    read_mask = get_src_arg_mask(inst, j);
-
-            if (inst->SrcReg[j].RelAddr) {
-               if (dbg)
-                  printf("abort remove dead code (indirect temp)\n");
-               goto done;
-            }
-
-	    for (comp = 0; comp < 4; comp++) {
-	       GLuint swz = (inst->SrcReg[j].Swizzle >> (3 * comp)) & 0x7;
-
-	       if ((read_mask & (1 << comp)) == 0)
-		  continue;
-
-	       switch (swz) {
-	       case SWIZZLE_X:
-		  tempRead[index][0] = GL_TRUE;
-		  break;
-	       case SWIZZLE_Y:
-		  tempRead[index][1] = GL_TRUE;
-		  break;
-	       case SWIZZLE_Z:
-		  tempRead[index][2] = GL_TRUE;
-		  break;
-	       case SWIZZLE_W:
-		  tempRead[index][3] = GL_TRUE;
-		  break;
-	       }
-	    }
-         }
-      }
-
-      /* check dst reg */
-      if (inst->DstReg.File == PROGRAM_TEMPORARY) {
-         const GLuint index = inst->DstReg.Index;
-         ASSERT(index < MAX_PROGRAM_TEMPS);
-
-         if (inst->DstReg.RelAddr) {
-            if (dbg)
-               printf("abort remove dead code (indirect temp)\n");
-            goto done;
-         }
-
-         if (inst->CondUpdate) {
-            /* If we're writing to this register and setting condition
-             * codes we cannot remove the instruction.  Prevent removal
-             * by setting the 'read' flag.
-             */
-            tempRead[index][0] = GL_TRUE;
-            tempRead[index][1] = GL_TRUE;
-            tempRead[index][2] = GL_TRUE;
-            tempRead[index][3] = GL_TRUE;
-         }
-      }
-   }
-
-   /* find instructions that write to dead registers, flag for removal */
-   for (i = 0; i < prog->NumInstructions; i++) {
-      struct prog_instruction *inst = prog->Instructions + i;
-      const GLuint numDst = _mesa_num_inst_dst_regs(inst->Opcode);
-
-      if (numDst != 0 && inst->DstReg.File == PROGRAM_TEMPORARY) {
-         GLint chan, index = inst->DstReg.Index;
-
-	 for (chan = 0; chan < 4; chan++) {
-	    if (!tempRead[index][chan] &&
-		inst->DstReg.WriteMask & (1 << chan)) {
-	       if (dbg) {
-		  printf("Remove writemask on %u.%c\n", i,
-			       chan == 3 ? 'w' : 'x' + chan);
-	       }
-	       inst->DstReg.WriteMask &= ~(1 << chan);
-	       rem++;
-	    }
-	 }
-
-	 if (inst->DstReg.WriteMask == 0) {
-	    /* If we cleared all writes, the instruction can be removed. */
-	    if (dbg)
-	       printf("Remove instruction %u: \n", i);
-	    removeInst[i] = GL_TRUE;
-	 }
-      }
-   }
-
-   /* now remove the instructions which aren't needed */
-   rem = remove_instructions(prog, removeInst);
-
-   if (dbg) {
-      printf("Optimize: End dead code removal.\n");
-      printf("  %u channel writes removed\n", rem);
-      printf("  %u instructions removed\n", rem);
-      /*_mesa_print_program(prog);*/
-   }
-
-done:
-   free(removeInst);
-}
-
-
-enum temp_use
-{
-   READ,
-   WRITE,
-   FLOW,
-   END
-};
-
-/**
- * Scan forward in program from 'start' for the next occurance of TEMP[index].
- * Return READ, WRITE, FLOW or END to indicate the next usage or an indicator
- * that we can't look further.
- */
-static enum temp_use
-find_next_temp_use(const struct gl_program *prog, GLuint start, GLuint index)
-{
-   GLuint i;
-
-   for (i = start; i < prog->NumInstructions; i++) {
-      const struct prog_instruction *inst = prog->Instructions + i;
-      switch (inst->Opcode) {
-      case OPCODE_BGNLOOP:
-      case OPCODE_ENDLOOP:
-      case OPCODE_BGNSUB:
-      case OPCODE_ENDSUB:
-         return FLOW;
-      default:
-         {
-            const GLuint numSrc = _mesa_num_inst_src_regs(inst->Opcode);
-            GLuint j;
-            for (j = 0; j < numSrc; j++) {
-               if (inst->SrcReg[j].File == PROGRAM_TEMPORARY &&
-                   inst->SrcReg[j].Index == index)
-                  return READ;
-            }
-            if (inst->DstReg.File == PROGRAM_TEMPORARY &&
-                inst->DstReg.Index == index)
-               return WRITE;
-         }
-      }
-   }
-
-   return END;
-}
-
-static GLboolean _mesa_is_flow_control_opcode(enum prog_opcode opcode)
-{
-   switch (opcode) {
-   case OPCODE_BGNLOOP:
-   case OPCODE_BGNSUB:
-   case OPCODE_BRA:
-   case OPCODE_CAL:
-   case OPCODE_CONT:
-   case OPCODE_IF:
-   case OPCODE_ELSE:
-   case OPCODE_END:
-   case OPCODE_ENDIF:
-   case OPCODE_ENDLOOP:
-   case OPCODE_ENDSUB:
-   case OPCODE_RET:
-      return GL_TRUE;
-   default:
-      return GL_FALSE;
-   }
-}
-
-/**
- * Try to remove use of extraneous MOV instructions, to free them up for dead
- * code removal.
- */
-static void
-_mesa_remove_extra_move_use(struct gl_program *prog)
-{
-   GLuint i, j;
-
-   if (dbg) {
-      printf("Optimize: Begin remove extra move use\n");
-      _mesa_print_program(prog);
-   }
-
-   /*
-    * Look for sequences such as this:
-    *    MOV tmpX, arg0;
-    *    ...
-    *    FOO tmpY, tmpX, arg1;
-    * and convert into:
-    *    MOV tmpX, arg0;
-    *    ...
-    *    FOO tmpY, arg0, arg1;
-    */
-
-   for (i = 0; i + 1 < prog->NumInstructions; i++) {
-      const struct prog_instruction *mov = prog->Instructions + i;
-
-      if (mov->Opcode != OPCODE_MOV ||
-	  mov->DstReg.File != PROGRAM_TEMPORARY ||
-	  mov->DstReg.RelAddr ||
-	  mov->DstReg.CondMask != COND_TR ||
-	  mov->SaturateMode != SATURATE_OFF ||
-	  mov->SrcReg[0].RelAddr)
-	 continue;
-
-      /* Walk through remaining instructions until the or src reg gets
-       * rewritten or we get into some flow-control, eliminating the use of
-       * this MOV.
-       */
-      for (j = i + 1; j < prog->NumInstructions; j++) {
-	 struct prog_instruction *inst2 = prog->Instructions + j;
-	 GLuint arg;
-
-	 if (_mesa_is_flow_control_opcode(inst2->Opcode))
-	     break;
-
-	 /* First rewrite this instruction's args if appropriate. */
-	 for (arg = 0; arg < _mesa_num_inst_src_regs(inst2->Opcode); arg++) {
-	    int comp;
-	    int read_mask = get_src_arg_mask(inst2, arg);
-
-	    if (inst2->SrcReg[arg].File != mov->DstReg.File ||
-		inst2->SrcReg[arg].Index != mov->DstReg.Index ||
-		inst2->SrcReg[arg].RelAddr ||
-		inst2->SrcReg[arg].Abs)
-	       continue;
-
-	    /* Check that all the sources for this arg of inst2 come from inst1
-	     * or constants.
-	     */
-	    for (comp = 0; comp < 4; comp++) {
-	       int src_swz = GET_SWZ(inst2->SrcReg[arg].Swizzle, comp);
-
-	       /* If the MOV didn't write that channel, can't use it. */
-	       if ((read_mask & (1 << comp)) &&
-		   src_swz <= SWIZZLE_W &&
-		   (mov->DstReg.WriteMask & (1 << src_swz)) == 0)
-		  break;
-	    }
-	    if (comp != 4)
-	       continue;
-
-	    /* Adjust the swizzles of inst2 to point at MOV's source */
-	    for (comp = 0; comp < 4; comp++) {
-	       int inst2_swz = GET_SWZ(inst2->SrcReg[arg].Swizzle, comp);
-
-	       if (inst2_swz <= SWIZZLE_W) {
-		  GLuint s = GET_SWZ(mov->SrcReg[0].Swizzle, inst2_swz);
-		  inst2->SrcReg[arg].Swizzle &= ~(7 << (3 * comp));
-		  inst2->SrcReg[arg].Swizzle |= s << (3 * comp);
-		  inst2->SrcReg[arg].Negate ^= (((mov->SrcReg[0].Negate >>
-						  inst2_swz) & 0x1) << comp);
-	       }
-	    }
-	    inst2->SrcReg[arg].File = mov->SrcReg[0].File;
-	    inst2->SrcReg[arg].Index = mov->SrcReg[0].Index;
-	 }
-
-	 /* If this instruction overwrote part of the move, our time is up. */
-	 if ((inst2->DstReg.File == mov->DstReg.File &&
-	      (inst2->DstReg.RelAddr ||
-	       inst2->DstReg.Index == mov->DstReg.Index)) ||
-	     (inst2->DstReg.File == mov->SrcReg[0].File &&
-	      (inst2->DstReg.RelAddr ||
-	       inst2->DstReg.Index == mov->SrcReg[0].Index)))
-	    break;
-      }
-   }
-
-   if (dbg) {
-      printf("Optimize: End remove extra move use.\n");
-      /*_mesa_print_program(prog);*/
-   }
-}
-
-/**
- * Try to remove extraneous MOV instructions from the given program.
- */
-static void
-_mesa_remove_extra_moves(struct gl_program *prog)
-{
-   GLboolean *removeInst; /* per-instruction removal flag */
-   GLuint i, rem, loopNesting = 0, subroutineNesting = 0;
-
-   if (dbg) {
-      printf("Optimize: Begin remove extra moves\n");
-      _mesa_print_program(prog);
-   }
-
-   removeInst = (GLboolean *)
-      calloc(1, prog->NumInstructions * sizeof(GLboolean));
-
-   /*
-    * Look for sequences such as this:
-    *    FOO tmpX, arg0, arg1;
-    *    MOV tmpY, tmpX;
-    * and convert into:
-    *    FOO tmpY, arg0, arg1;
-    */
-
-   for (i = 0; i < prog->NumInstructions; i++) {
-      const struct prog_instruction *inst = prog->Instructions + i;
-
-      switch (inst->Opcode) {
-      case OPCODE_BGNLOOP:
-         loopNesting++;
-         break;
-      case OPCODE_ENDLOOP:
-         loopNesting--;
-         break;
-      case OPCODE_BGNSUB:
-         subroutineNesting++;
-         break;
-      case OPCODE_ENDSUB:
-         subroutineNesting--;
-         break;
-      case OPCODE_MOV:
-         if (i > 0 &&
-             loopNesting == 0 &&
-             subroutineNesting == 0 &&
-             inst->SrcReg[0].File == PROGRAM_TEMPORARY &&
-             inst->SrcReg[0].Swizzle == SWIZZLE_XYZW) {
-            /* see if this MOV can be removed */
-            const GLuint tempIndex = inst->SrcReg[0].Index;
-            struct prog_instruction *prevInst;
-            GLuint prevI;
-
-            /* get pointer to previous instruction */
-            prevI = i - 1;
-            while (prevI > 0 && removeInst[prevI])
-               prevI--;
-            prevInst = prog->Instructions + prevI;
-
-            if (prevInst->DstReg.File == PROGRAM_TEMPORARY &&
-                prevInst->DstReg.Index == tempIndex &&
-                prevInst->DstReg.WriteMask == WRITEMASK_XYZW) {
-
-               enum temp_use next_use =
-                  find_next_temp_use(prog, i + 1, tempIndex);
-
-               if (next_use == WRITE || next_use == END) {
-                  /* OK, we can safely remove this MOV instruction.
-                   * Transform:
-                   *   prevI: FOO tempIndex, x, y;
-                   *       i: MOV z, tempIndex;
-                   * Into:
-                   *   prevI: FOO z, x, y;
-                   */
-
-                  /* patch up prev inst */
-                  prevInst->DstReg.File = inst->DstReg.File;
-                  prevInst->DstReg.Index = inst->DstReg.Index;
-
-                  /* flag this instruction for removal */
-                  removeInst[i] = GL_TRUE;
-
-                  if (dbg) {
-                     printf("Remove MOV at %u\n", i);
-                     printf("new prev inst %u: ", prevI);
-                     _mesa_print_instruction(prevInst);
-                  }
-               }
-            }
-         }
-         break;
-      default:
-         ; /* nothing */
-      }
-   }
-
-   /* now remove the instructions which aren't needed */
-   rem = remove_instructions(prog, removeInst);
-
-   free(removeInst);
-
-   if (dbg) {
-      printf("Optimize: End remove extra moves.  %u instructions removed\n", rem);
-      /*_mesa_print_program(prog);*/
-   }
-}
-
-
-/** A live register interval */
-struct interval
-{
-   GLuint Reg;         /** The temporary register index */
-   GLuint Start, End;  /** Start/end instruction numbers */
-};
-
-
-/** A list of register intervals */
-struct interval_list
-{
-   GLuint Num;
-   struct interval Intervals[MAX_PROGRAM_TEMPS];
-};
-
-
-static void
-append_interval(struct interval_list *list, const struct interval *inv)
-{
-   list->Intervals[list->Num++] = *inv;
-}
-
-
-/** Insert interval inv into list, sorted by interval end */
-static void
-insert_interval_by_end(struct interval_list *list, const struct interval *inv)
-{
-   /* XXX we could do a binary search insertion here since list is sorted */
-   GLint i = list->Num - 1;
-   while (i >= 0 && list->Intervals[i].End > inv->End) {
-      list->Intervals[i + 1] = list->Intervals[i];
-      i--;
-   }
-   list->Intervals[i + 1] = *inv;
-   list->Num++;
-
-#ifdef DEBUG
-   {
-      GLuint i;
-      for (i = 0; i + 1 < list->Num; i++) {
-         ASSERT(list->Intervals[i].End <= list->Intervals[i + 1].End);
-      }
-   }
-#endif
-}
-
-
-/** Remove the given interval from the interval list */
-static void
-remove_interval(struct interval_list *list, const struct interval *inv)
-{
-   /* XXX we could binary search since list is sorted */
-   GLuint k;
-   for (k = 0; k < list->Num; k++) {
-      if (list->Intervals[k].Reg == inv->Reg) {
-         /* found, remove it */
-         ASSERT(list->Intervals[k].Start == inv->Start);
-         ASSERT(list->Intervals[k].End == inv->End);
-         while (k < list->Num - 1) {
-            list->Intervals[k] = list->Intervals[k + 1];
-            k++;
-         }
-         list->Num--;
-         return;
-      }
-   }
-}
-
-
-/** called by qsort() */
-static int
-compare_start(const void *a, const void *b)
-{
-   const struct interval *ia = (const struct interval *) a;
-   const struct interval *ib = (const struct interval *) b;
-   if (ia->Start < ib->Start)
-      return -1;
-   else if (ia->Start > ib->Start)
-      return +1;
-   else
-      return 0;
-}
-
-/** sort the interval list according to interval starts */
-static void
-sort_interval_list_by_start(struct interval_list *list)
-{
-   qsort(list->Intervals, list->Num, sizeof(struct interval), compare_start);
-#ifdef DEBUG
-   {
-      GLuint i;
-      for (i = 0; i + 1 < list->Num; i++) {
-         ASSERT(list->Intervals[i].Start <= list->Intervals[i + 1].Start);
-      }
-   }
-#endif
-}
-
-
-/**
- * Update the intermediate interval info for register 'index' and
- * instruction 'ic'.
- */
-static void
-update_interval(GLint intBegin[], GLint intEnd[], GLuint index, GLuint ic)
-{
-   ASSERT(index < MAX_PROGRAM_TEMPS);
-   if (intBegin[index] == -1) {
-      ASSERT(intEnd[index] == -1);
-      intBegin[index] = intEnd[index] = ic;
-   }
-   else {
-      intEnd[index] = ic;
-   }
-}
-
-
-/**
- * Find first/last instruction that references each temporary register.
- */
-GLboolean
-_mesa_find_temp_intervals(const struct prog_instruction *instructions,
-                          GLuint numInstructions,
-                          GLint intBegin[MAX_PROGRAM_TEMPS],
-                          GLint intEnd[MAX_PROGRAM_TEMPS])
-{
-   struct loop_info
-   {
-      GLuint Start, End;  /**< Start, end instructions of loop */
-   };
-   struct loop_info loopStack[MAX_LOOP_NESTING];
-   GLuint loopStackDepth = 0;
-   GLuint i;
-
-   for (i = 0; i < MAX_PROGRAM_TEMPS; i++){
-      intBegin[i] = intEnd[i] = -1;
-   }
-
-   /* Scan instructions looking for temporary registers */
-   for (i = 0; i < numInstructions; i++) {
-      const struct prog_instruction *inst = instructions + i;
-      if (inst->Opcode == OPCODE_BGNLOOP) {
-         loopStack[loopStackDepth].Start = i;
-         loopStack[loopStackDepth].End = inst->BranchTarget;
-         loopStackDepth++;
-      }
-      else if (inst->Opcode == OPCODE_ENDLOOP) {
-         loopStackDepth--;
-      }
-      else if (inst->Opcode == OPCODE_CAL) {
-         return GL_FALSE;
-      }
-      else {
-         const GLuint numSrc = 3;/*_mesa_num_inst_src_regs(inst->Opcode);*/
-         GLuint j;
-         for (j = 0; j < numSrc; j++) {
-            if (inst->SrcReg[j].File == PROGRAM_TEMPORARY) {
-               const GLuint index = inst->SrcReg[j].Index;
-               if (inst->SrcReg[j].RelAddr)
-                  return GL_FALSE;
-               update_interval(intBegin, intEnd, index, i);
-               if (loopStackDepth > 0) {
-                  /* extend temp register's interval to end of loop */
-                  GLuint loopEnd = loopStack[loopStackDepth - 1].End;
-                  update_interval(intBegin, intEnd, index, loopEnd);
-               }
-            }
-         }
-         if (inst->DstReg.File == PROGRAM_TEMPORARY) {
-            const GLuint index = inst->DstReg.Index;
-            if (inst->DstReg.RelAddr)
-               return GL_FALSE;
-            update_interval(intBegin, intEnd, index, i);
-            if (loopStackDepth > 0) {
-               /* extend temp register's interval to end of loop */
-               GLuint loopEnd = loopStack[loopStackDepth - 1].End;
-               update_interval(intBegin, intEnd, index, loopEnd);
-            }
-         }
-      }
-   }
-
-   return GL_TRUE;
-}
-
-
-/**
- * Find the live intervals for each temporary register in the program.
- * For register R, the interval [A,B] indicates that R is referenced
- * from instruction A through instruction B.
- * Special consideration is needed for loops and subroutines.
- * \return GL_TRUE if success, GL_FALSE if we cannot proceed for some reason
- */
-static GLboolean
-find_live_intervals(struct gl_program *prog,
-                    struct interval_list *liveIntervals)
-{
-   GLint intBegin[MAX_PROGRAM_TEMPS], intEnd[MAX_PROGRAM_TEMPS];
-   GLuint i;
-
-   /*
-    * Note: we'll return GL_FALSE below if we find relative indexing
-    * into the TEMP register file.  We can't handle that yet.
-    * We also give up on subroutines for now.
-    */
-
-   if (dbg) {
-      printf("Optimize: Begin find intervals\n");
-   }
-
-   /* build intermediate arrays */
-   if (!_mesa_find_temp_intervals(prog->Instructions, prog->NumInstructions,
-                                  intBegin, intEnd))
-      return GL_FALSE;
-
-   /* Build live intervals list from intermediate arrays */
-   liveIntervals->Num = 0;
-   for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
-      if (intBegin[i] >= 0) {
-         struct interval inv;
-         inv.Reg = i;
-         inv.Start = intBegin[i];
-         inv.End = intEnd[i];
-         append_interval(liveIntervals, &inv);
-      }
-   }
-
-   /* Sort the list according to interval starts */
-   sort_interval_list_by_start(liveIntervals);
-
-   if (dbg) {
-      /* print interval info */
-      for (i = 0; i < liveIntervals->Num; i++) {
-         const struct interval *inv = liveIntervals->Intervals + i;
-         printf("Reg[%d] live [%d, %d]:",
-                      inv->Reg, inv->Start, inv->End);
-         if (1) {
-            GLuint j;
-            for (j = 0; j < inv->Start; j++)
-               printf(" ");
-            for (j = inv->Start; j <= inv->End; j++)
-               printf("x");
-         }
-         printf("\n");
-      }
-   }
-
-   return GL_TRUE;
-}
-
-
-/** Scan the array of used register flags to find free entry */
-static GLint
-alloc_register(GLboolean usedRegs[MAX_PROGRAM_TEMPS])
-{
-   GLuint k;
-   for (k = 0; k < MAX_PROGRAM_TEMPS; k++) {
-      if (!usedRegs[k]) {
-         usedRegs[k] = GL_TRUE;
-         return k;
-      }
-   }
-   return -1;
-}
-
-
-/**
- * This function implements "Linear Scan Register Allocation" to reduce
- * the number of temporary registers used by the program.
- *
- * We compute the "live interval" for all temporary registers then
- * examine the overlap of the intervals to allocate new registers.
- * Basically, if two intervals do not overlap, they can use the same register.
- */
-static void
-_mesa_reallocate_registers(struct gl_program *prog)
-{
-   struct interval_list liveIntervals;
-   GLint registerMap[MAX_PROGRAM_TEMPS];
-   GLboolean usedRegs[MAX_PROGRAM_TEMPS];
-   GLuint i;
-   GLint maxTemp = -1;
-
-   if (dbg) {
-      printf("Optimize: Begin live-interval register reallocation\n");
-      _mesa_print_program(prog);
-   }
-
-   for (i = 0; i < MAX_PROGRAM_TEMPS; i++){
-      registerMap[i] = -1;
-      usedRegs[i] = GL_FALSE;
-   }
-
-   if (!find_live_intervals(prog, &liveIntervals)) {
-      if (dbg)
-         printf("Aborting register reallocation\n");
-      return;
-   }
-
-   {
-      struct interval_list activeIntervals;
-      activeIntervals.Num = 0;
-
-      /* loop over live intervals, allocating a new register for each */
-      for (i = 0; i < liveIntervals.Num; i++) {
-         const struct interval *live = liveIntervals.Intervals + i;
-
-         if (dbg)
-            printf("Consider register %u\n", live->Reg);
-
-         /* Expire old intervals.  Intervals which have ended with respect
-          * to the live interval can have their remapped registers freed.
-          */
-         {
-            GLint j;
-            for (j = 0; j < (GLint) activeIntervals.Num; j++) {
-               const struct interval *inv = activeIntervals.Intervals + j;
-               if (inv->End >= live->Start) {
-                  /* Stop now.  Since the activeInterval list is sorted
-                   * we know we don't have to go further.
-                   */
-                  break;
-               }
-               else {
-                  /* Interval 'inv' has expired */
-                  const GLint regNew = registerMap[inv->Reg];
-                  ASSERT(regNew >= 0);
-
-                  if (dbg)
-                     printf("  expire interval for reg %u\n", inv->Reg);
-
-                  /* remove interval j from active list */
-                  remove_interval(&activeIntervals, inv);
-                  j--;  /* counter-act j++ in for-loop above */
-
-                  /* return register regNew to the free pool */
-                  if (dbg)
-                     printf("  free reg %d\n", regNew);
-                  ASSERT(usedRegs[regNew] == GL_TRUE);
-                  usedRegs[regNew] = GL_FALSE;
-               }
-            }
-         }
-
-         /* find a free register for this live interval */
-         {
-            const GLint k = alloc_register(usedRegs);
-            if (k < 0) {
-               /* out of registers, give up */
-               return;
-            }
-            registerMap[live->Reg] = k;
-            maxTemp = MAX2(maxTemp, k);
-            if (dbg)
-               printf("  remap register %u -> %d\n", live->Reg, k);
-         }
-
-         /* Insert this live interval into the active list which is sorted
-          * by increasing end points.
-          */
-         insert_interval_by_end(&activeIntervals, live);
-      }
-   }
-
-   if (maxTemp + 1 < (GLint) liveIntervals.Num) {
-      /* OK, we've reduced the number of registers needed.
-       * Scan the program and replace all the old temporary register
-       * indexes with the new indexes.
-       */
-      replace_regs(prog, PROGRAM_TEMPORARY, registerMap);
-
-      prog->NumTemporaries = maxTemp + 1;
-   }
-
-   if (dbg) {
-      printf("Optimize: End live-interval register reallocation\n");
-      printf("Num temp regs before: %u  after: %u\n",
-                   liveIntervals.Num, maxTemp + 1);
-      _mesa_print_program(prog);
-   }
-}
-
-
-/**
- * Apply optimizations to the given program to eliminate unnecessary
- * instructions, temp regs, etc.
- */
-void
-_mesa_optimize_program(GLcontext *ctx, struct gl_program *program)
-{
-   _mesa_remove_extra_move_use(program);
-
-   if (1)
-      _mesa_remove_dead_code(program);
-
-   if (0) /* not tested much yet */
-      _mesa_remove_extra_moves(program);
-
-   if (0)
-      _mesa_consolidate_registers(program);
-   else
-      _mesa_reallocate_registers(program);
-}