mesa/st: glsl_to_tgsi move some helper classes to extra files

To prepare the implementation of a temp register lifetime tracker
some of the classes are moved into seperate header/implementation
files to make them accessible from other files.

Specifically these are:

    class st_src_reg;
    class st_dst_reg;
    class glsl_to_tgsi_instruction;
    struct rename_reg_pair;

    int swizzle_for_type(const glsl_type *type, int component);

  as inline:

    bool is_resource_instruction(unsigned opcode);
    unsigned num_inst_dst_regs(const glsl_to_tgsi_instruction *op);
    unsigned num_inst_src_regs(const glsl_to_tgsi_instruction *op);

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

4 files changed, 368 insertions, 287 deletions

diff --git a/src/mesa/Makefile.sources b/src/mesa/Makefile.sources
index e65b091fe8..40d1a2e538 100644
--- a/src/mesa/Makefile.sources
+++ b/src/mesa/Makefile.sources
@@ -511,6 +511,8 @@ STATETRACKER_FILES = \
 	state_tracker/st_glsl_to_nir.cpp \
 	state_tracker/st_glsl_to_tgsi.cpp \
 	state_tracker/st_glsl_to_tgsi.h \
+	state_tracker/st_glsl_to_tgsi_private.cpp \
+	state_tracker/st_glsl_to_tgsi_private.h \
 	state_tracker/st_glsl_types.cpp \
 	state_tracker/st_glsl_types.h \
 	state_tracker/st_manager.c \
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
index 5348c6f9f3..7ccb6e25d6 100644
--- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp
@@ -55,6 +55,7 @@
 #include "st_format.h"
 #include "st_nir.h"
 #include "st_shader_cache.h"
+#include "st_glsl_to_tgsi_private.h"
 
 #include "util/hash_table.h"
 #include <algorithm>
@@ -65,28 +66,6 @@
 
 #define MAX_GLSL_TEXTURE_OFFSET 4
 
-class st_src_reg;
-class st_dst_reg;
-
-static int swizzle_for_size(int size);
-
-static int swizzle_for_type(const glsl_type *type, int component = 0)
-{
-   unsigned num_elements = 4;
-
-   if (type) {
-      type = type->without_array();
-      if (type->is_scalar() || type->is_vector() || type->is_matrix())
-         num_elements = type->vector_elements;
-   }
-
-   int swizzle = swizzle_for_size(num_elements);
-   assert(num_elements + component <= 4);
-
-   swizzle += component * MAKE_SWIZZLE4(1, 1, 1, 1);
-   return swizzle;
-}
-
 static unsigned is_precise(const ir_variable *ir)
 {
    if (!ir)
@@ -94,231 +73,6 @@ static unsigned is_precise(const ir_variable *ir)
    return ir->data.precise || ir->data.invariant;
 }
 
-/**
- * This struct is a corresponding struct to TGSI ureg_src.
- */
-class st_src_reg {
-public:
-   st_src_reg(gl_register_file file, int index, const glsl_type *type,
-              int component = 0, unsigned array_id = 0)
-   {
-      assert(file != PROGRAM_ARRAY || array_id != 0);
-      this->file = file;
-      this->index = index;
-      this->swizzle = swizzle_for_type(type, component);
-      this->negate = 0;
-      this->abs = 0;
-      this->index2D = 0;
-      this->type = type ? type->base_type : GLSL_TYPE_ERROR;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->double_reg2 = false;
-      this->array_id = array_id;
-      this->is_double_vertex_input = false;
-   }
-
-   st_src_reg(gl_register_file file, int index, enum glsl_base_type type)
-   {
-      assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
-      this->type = type;
-      this->file = file;
-      this->index = index;
-      this->index2D = 0;
-      this->swizzle = SWIZZLE_XYZW;
-      this->negate = 0;
-      this->abs = 0;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->double_reg2 = false;
-      this->array_id = 0;
-      this->is_double_vertex_input = false;
-   }
-
-   st_src_reg(gl_register_file file, int index, enum glsl_base_type type, int index2D)
-   {
-      assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
-      this->type = type;
-      this->file = file;
-      this->index = index;
-      this->index2D = index2D;
-      this->swizzle = SWIZZLE_XYZW;
-      this->negate = 0;
-      this->abs = 0;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->double_reg2 = false;
-      this->array_id = 0;
-      this->is_double_vertex_input = false;
-   }
-
-   st_src_reg()
-   {
-      this->type = GLSL_TYPE_ERROR;
-      this->file = PROGRAM_UNDEFINED;
-      this->index = 0;
-      this->index2D = 0;
-      this->swizzle = 0;
-      this->negate = 0;
-      this->abs = 0;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->double_reg2 = false;
-      this->array_id = 0;
-      this->is_double_vertex_input = false;
-   }
-
-   explicit st_src_reg(st_dst_reg reg);
-
-   int32_t index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
-   int16_t index2D;
-   uint16_t swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
-   int negate:4; /**< NEGATE_XYZW mask from mesa */
-   unsigned abs:1;
-   enum glsl_base_type type:5; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
-   unsigned has_index2:1;
-   gl_register_file file:5; /**< PROGRAM_* from Mesa */
-   /*
-    * Is this the second half of a double register pair?
-    * currently used for input mapping only.
-    */
-   unsigned double_reg2:1;
-   unsigned is_double_vertex_input:1;
-   unsigned array_id:10;
-
-   /** Register index should be offset by the integer in this reg. */
-   st_src_reg *reladdr;
-   st_src_reg *reladdr2;
-
-   st_src_reg get_abs()
-   {
-      st_src_reg reg = *this;
-      reg.negate = 0;
-      reg.abs = 1;
-      return reg;
-   }
-};
-
-class st_dst_reg {
-public:
-   st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type, int index)
-   {
-      assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
-      this->file = file;
-      this->index = index;
-      this->index2D = 0;
-      this->writemask = writemask;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->type = type;
-      this->array_id = 0;
-   }
-
-   st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type)
-   {
-      assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
-      this->file = file;
-      this->index = 0;
-      this->index2D = 0;
-      this->writemask = writemask;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->type = type;
-      this->array_id = 0;
-   }
-
-   st_dst_reg()
-   {
-      this->type = GLSL_TYPE_ERROR;
-      this->file = PROGRAM_UNDEFINED;
-      this->index = 0;
-      this->index2D = 0;
-      this->writemask = 0;
-      this->reladdr = NULL;
-      this->reladdr2 = NULL;
-      this->has_index2 = false;
-      this->array_id = 0;
-   }
-
-   explicit st_dst_reg(st_src_reg reg);
-
-   int32_t index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
-   int16_t index2D;
-   gl_register_file file:5; /**< PROGRAM_* from Mesa */
-   unsigned writemask:4; /**< Bitfield of WRITEMASK_[XYZW] */
-   enum glsl_base_type type:5; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
-   unsigned has_index2:1;
-   unsigned array_id:10;
-
-   /** Register index should be offset by the integer in this reg. */
-   st_src_reg *reladdr;
-   st_src_reg *reladdr2;
-};
-
-st_src_reg::st_src_reg(st_dst_reg reg)
-{
-   this->type = reg.type;
-   this->file = reg.file;
-   this->index = reg.index;
-   this->swizzle = SWIZZLE_XYZW;
-   this->negate = 0;
-   this->abs = 0;
-   this->reladdr = reg.reladdr;
-   this->index2D = reg.index2D;
-   this->reladdr2 = reg.reladdr2;
-   this->has_index2 = reg.has_index2;
-   this->double_reg2 = false;
-   this->array_id = reg.array_id;
-   this->is_double_vertex_input = false;
-}
-
-st_dst_reg::st_dst_reg(st_src_reg reg)
-{
-   this->type = reg.type;
-   this->file = reg.file;
-   this->index = reg.index;
-   this->writemask = WRITEMASK_XYZW;
-   this->reladdr = reg.reladdr;
-   this->index2D = reg.index2D;
-   this->reladdr2 = reg.reladdr2;
-   this->has_index2 = reg.has_index2;
-   this->array_id = reg.array_id;
-}
-
-class glsl_to_tgsi_instruction : public exec_node {
-public:
-   DECLARE_RALLOC_CXX_OPERATORS(glsl_to_tgsi_instruction)
-
-   st_dst_reg dst[2];
-   st_src_reg src[4];
-   st_src_reg resource; /**< sampler, image or buffer register */
-   st_src_reg *tex_offsets;
-
-   /** Pointer to the ir source this tree came from for debugging */
-   ir_instruction *ir;
-
-   unsigned op:8; /**< TGSI opcode */
-   unsigned precise:1;
-   unsigned saturate:1;
-   unsigned is_64bit_expanded:1;
-   unsigned sampler_base:5;
-   unsigned sampler_array_size:6; /**< 1-based size of sampler array, 1 if not array */
-   unsigned tex_target:4; /**< One of TEXTURE_*_INDEX */
-   glsl_base_type tex_type:5;
-   unsigned tex_shadow:1;
-   unsigned image_format:9;
-   unsigned tex_offset_num_offset:3;
-   unsigned dead_mask:4; /**< Used in dead code elimination */
-   unsigned buffer_access:3; /**< buffer access type */
-
-   const struct tgsi_opcode_info *info;
-};
-
 class variable_storage {
    DECLARE_RZALLOC_CXX_OPERATORS(variable_storage)
 
@@ -398,11 +152,6 @@ find_array_type(struct inout_decl *decls, unsigned count, unsigned array_id)
    return GLSL_TYPE_ERROR;
 }
 
-struct rename_reg_pair {
-   bool valid;
-   int new_reg;
-};
-
 struct glsl_to_tgsi_visitor : public ir_visitor {
 public:
    glsl_to_tgsi_visitor();
@@ -606,7 +355,7 @@ fail_link(struct gl_shader_program *prog, const char *fmt, ...)
    prog->data->LinkStatus = linking_failure;
 }
 
-static int
+int
 swizzle_for_size(int size)
 {
    static const int size_swizzles[4] = {
@@ -620,40 +369,6 @@ swizzle_for_size(int size)
    return size_swizzles[size - 1];
 }
 
-static bool
-is_resource_instruction(unsigned opcode)
-{
-   switch (opcode) {
-   case TGSI_OPCODE_RESQ:
-   case TGSI_OPCODE_LOAD:
-   case TGSI_OPCODE_ATOMUADD:
-   case TGSI_OPCODE_ATOMXCHG:
-   case TGSI_OPCODE_ATOMCAS:
-   case TGSI_OPCODE_ATOMAND:
-   case TGSI_OPCODE_ATOMOR:
-   case TGSI_OPCODE_ATOMXOR:
-   case TGSI_OPCODE_ATOMUMIN:
-   case TGSI_OPCODE_ATOMUMAX:
-   case TGSI_OPCODE_ATOMIMIN:
-   case TGSI_OPCODE_ATOMIMAX:
-      return true;
-   default:
-      return false;
-   }
-}
-
-static unsigned
-num_inst_dst_regs(const glsl_to_tgsi_instruction *op)
-{
-   return op->info->num_dst;
-}
-
-static unsigned
-num_inst_src_regs(const glsl_to_tgsi_instruction *op)
-{
-   return op->info->is_tex || is_resource_instruction(op->op) ?
-      op->info->num_src - 1 : op->info->num_src;
-}
 
 glsl_to_tgsi_instruction *
 glsl_to_tgsi_visitor::emit_asm(ir_instruction *ir, unsigned op,
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp
new file mode 100644
index 0000000000..0075ae8676
--- /dev/null
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_private.cpp
@@ -0,0 +1,196 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ * Copyright © 2011 Bryan Cain
+ * Copyright © 2017 Gert Wollny
+ *
+ * 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 (including the next
+ * paragraph) 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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 "st_glsl_to_tgsi_private.h"
+#include <tgsi/tgsi_info.h>
+#include <mesa/program/prog_instruction.h>
+
+static int swizzle_for_type(const glsl_type *type, int component = 0)
+{
+   unsigned num_elements = 4;
+
+   if (type) {
+      type = type->without_array();
+      if (type->is_scalar() || type->is_vector() || type->is_matrix())
+         num_elements = type->vector_elements;
+   }
+
+   int swizzle = swizzle_for_size(num_elements);
+   assert(num_elements + component <= 4);
+
+   swizzle += component * MAKE_SWIZZLE4(1, 1, 1, 1);
+   return swizzle;
+}
+
+st_src_reg::st_src_reg(gl_register_file file, int index, const glsl_type *type,
+                       int component, unsigned array_id)
+{
+   assert(file != PROGRAM_ARRAY || array_id != 0);
+   this->file = file;
+   this->index = index;
+   this->swizzle = swizzle_for_type(type, component);
+   this->negate = 0;
+   this->abs = 0;
+   this->index2D = 0;
+   this->type = type ? type->base_type : GLSL_TYPE_ERROR;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->double_reg2 = false;
+   this->array_id = array_id;
+   this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg(gl_register_file file, int index, enum glsl_base_type type)
+{
+   assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+   this->type = type;
+   this->file = file;
+   this->index = index;
+   this->index2D = 0;
+   this->swizzle = SWIZZLE_XYZW;
+   this->negate = 0;
+   this->abs = 0;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->double_reg2 = false;
+   this->array_id = 0;
+   this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg(gl_register_file file, int index, enum glsl_base_type type, int index2D)
+{
+   assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+   this->type = type;
+   this->file = file;
+   this->index = index;
+   this->index2D = index2D;
+   this->swizzle = SWIZZLE_XYZW;
+   this->negate = 0;
+   this->abs = 0;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->double_reg2 = false;
+   this->array_id = 0;
+   this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg()
+{
+   this->type = GLSL_TYPE_ERROR;
+   this->file = PROGRAM_UNDEFINED;
+   this->index = 0;
+   this->index2D = 0;
+   this->swizzle = 0;
+   this->negate = 0;
+   this->abs = 0;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->double_reg2 = false;
+   this->array_id = 0;
+   this->is_double_vertex_input = false;
+}
+
+st_src_reg::st_src_reg(st_dst_reg reg)
+{
+   this->type = reg.type;
+   this->file = reg.file;
+   this->index = reg.index;
+   this->swizzle = SWIZZLE_XYZW;
+   this->negate = 0;
+   this->abs = 0;
+   this->reladdr = reg.reladdr;
+   this->index2D = reg.index2D;
+   this->reladdr2 = reg.reladdr2;
+   this->has_index2 = reg.has_index2;
+   this->double_reg2 = false;
+   this->array_id = reg.array_id;
+   this->is_double_vertex_input = false;
+}
+
+st_src_reg st_src_reg::get_abs()
+{
+   st_src_reg reg = *this;
+   reg.negate = 0;
+   reg.abs = 1;
+   return reg;
+}
+
+st_dst_reg::st_dst_reg(st_src_reg reg)
+{
+   this->type = reg.type;
+   this->file = reg.file;
+   this->index = reg.index;
+   this->writemask = WRITEMASK_XYZW;
+   this->reladdr = reg.reladdr;
+   this->index2D = reg.index2D;
+   this->reladdr2 = reg.reladdr2;
+   this->has_index2 = reg.has_index2;
+   this->array_id = reg.array_id;
+}
+
+st_dst_reg::st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type, int index)
+{
+   assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+   this->file = file;
+   this->index = index;
+   this->index2D = 0;
+   this->writemask = writemask;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->type = type;
+   this->array_id = 0;
+}
+
+st_dst_reg::st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type)
+{
+   assert(file != PROGRAM_ARRAY); /* need array_id > 0 */
+   this->file = file;
+   this->index = 0;
+   this->index2D = 0;
+   this->writemask = writemask;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->type = type;
+   this->array_id = 0;
+}
+
+st_dst_reg::st_dst_reg()
+{
+   this->type = GLSL_TYPE_ERROR;
+   this->file = PROGRAM_UNDEFINED;
+   this->index = 0;
+   this->index2D = 0;
+   this->writemask = 0;
+   this->reladdr = NULL;
+   this->reladdr2 = NULL;
+   this->has_index2 = false;
+   this->array_id = 0;
+}
\ No newline at end of file
diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi_private.h b/src/mesa/state_tracker/st_glsl_to_tgsi_private.h
new file mode 100644
index 0000000000..c92d96cf6c
--- /dev/null
+++ b/src/mesa/state_tracker/st_glsl_to_tgsi_private.h
@@ -0,0 +1,168 @@
+/*
+ * Copyright © 2010 Intel Corporation
+ * Copyright © 2011 Bryan Cain
+ * Copyright © 2017 Gert Wollny
+ *
+ * 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 (including the next
+ * paragraph) 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#ifndef ST_GLSL_TO_TGSI_PRIVATE_H
+#define ST_GLSL_TO_TGSI_PRIVATE_H
+
+#include <mesa/main/mtypes.h>
+#include <compiler/glsl_types.h>
+#include <compiler/glsl/ir.h>
+#include <tgsi/tgsi_info.h>
+
+int swizzle_for_size(int size);
+
+class st_dst_reg;
+/**
+ * This struct is a corresponding struct to TGSI ureg_src.
+ */
+class st_src_reg {
+public:
+   st_src_reg(gl_register_file file, int index, const glsl_type *type,
+              int component = 0, unsigned array_id = 0);
+
+   st_src_reg(gl_register_file file, int index, enum glsl_base_type type);
+
+   st_src_reg(gl_register_file file, int index, enum glsl_base_type type, int index2D);
+
+   st_src_reg();
+
+   explicit st_src_reg(st_dst_reg reg);
+
+   st_src_reg get_abs();
+
+   int32_t index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
+   int16_t index2D;
+
+   uint16_t swizzle; /**< SWIZZLE_XYZWONEZERO swizzles from Mesa. */
+   int negate:4; /**< NEGATE_XYZW mask from mesa */
+   unsigned abs:1;
+   enum glsl_base_type type:5; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
+   unsigned has_index2:1;
+   gl_register_file file:5; /**< PROGRAM_* from Mesa */
+   /*
+    * Is this the second half of a double register pair?
+    * currently used for input mapping only.
+    */
+   unsigned double_reg2:1;
+   unsigned is_double_vertex_input:1;
+   unsigned array_id:10;
+   /** Register index should be offset by the integer in this reg. */
+   st_src_reg *reladdr;
+   st_src_reg *reladdr2;
+
+};
+
+class st_dst_reg {
+public:
+   st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type, int index);
+
+   st_dst_reg(gl_register_file file, int writemask, enum glsl_base_type type);
+
+   st_dst_reg();
+
+   explicit st_dst_reg(st_src_reg reg);
+
+   int32_t index; /**< temporary index, VERT_ATTRIB_*, VARYING_SLOT_*, etc. */
+   int16_t index2D;
+   gl_register_file file:5; /**< PROGRAM_* from Mesa */
+   unsigned writemask:4; /**< Bitfield of WRITEMASK_[XYZW] */
+   enum glsl_base_type type:5; /** GLSL_TYPE_* from GLSL IR (enum glsl_base_type) */
+   unsigned has_index2:1;
+   unsigned array_id:10;
+
+   /** Register index should be offset by the integer in this reg. */
+   st_src_reg *reladdr;
+   st_src_reg *reladdr2;
+};
+
+class glsl_to_tgsi_instruction : public exec_node {
+public:
+   DECLARE_RALLOC_CXX_OPERATORS(glsl_to_tgsi_instruction)
+
+   st_dst_reg dst[2];
+   st_src_reg src[4];
+   st_src_reg resource; /**< sampler or buffer register */
+   st_src_reg *tex_offsets;
+
+   /** Pointer to the ir source this tree came fe02549fdrom for debugging */
+   ir_instruction *ir;
+
+   unsigned op:8; /**< TGSI opcode */
+   unsigned precise:1;
+   unsigned saturate:1;
+   unsigned is_64bit_expanded:1;
+   unsigned sampler_base:5;
+   unsigned sampler_array_size:6; /**< 1-based size of sampler array, 1 if not array */
+   unsigned tex_target:4; /**< One of TEXTURE_*_INDEX */
+   glsl_base_type tex_type:5;
+   unsigned tex_shadow:1;
+   unsigned image_format:9;
+   unsigned tex_offset_num_offset:3;
+   unsigned dead_mask:4; /**< Used in dead code elimination */
+   unsigned buffer_access:3; /**< buffer access type */
+
+   const struct tgsi_opcode_info *info;
+};
+
+struct rename_reg_pair {
+   bool valid;
+   int new_reg;
+};
+
+inline static bool
+is_resource_instruction(unsigned opcode)
+{
+   switch (opcode) {
+   case TGSI_OPCODE_RESQ:
+   case TGSI_OPCODE_LOAD:
+   case TGSI_OPCODE_ATOMUADD:
+   case TGSI_OPCODE_ATOMXCHG:
+   case TGSI_OPCODE_ATOMCAS:
+   case TGSI_OPCODE_ATOMAND:
+   case TGSI_OPCODE_ATOMOR:
+   case TGSI_OPCODE_ATOMXOR:
+   case TGSI_OPCODE_ATOMUMIN:
+   case TGSI_OPCODE_ATOMUMAX:
+   case TGSI_OPCODE_ATOMIMIN:
+   case TGSI_OPCODE_ATOMIMAX:
+      return true;
+   default:
+      return false;
+   }
+}
+
+inline static unsigned
+num_inst_dst_regs(const glsl_to_tgsi_instruction *op)
+{
+   return op->info->num_dst;
+}
+
+inline static unsigned
+num_inst_src_regs(const glsl_to_tgsi_instruction *op)
+{
+   return op->info->is_tex || is_resource_instruction(op->op) ?
+      op->info->num_src - 1 : op->info->num_src;
+}
+#endif