i965: Move the back-end compiler to src/intel/compiler

Mostly a dummy git mv with a couple of noticable parts:
 - With the earlier header cleanups, nothing in src/intel depends
files from src/mesa/drivers/dri/i965/
 - Both Autoconf and Android builds are addressed. Thanks to Mauro and
Tapani for the fixups in the latter
 - brw_util.[ch] is not really compiler specific, so it's moved to i965.

v2:
 - move brw_eu_defines.h instead of brw_defines.h
 - remove no-longer applicable includes
 - add missing vulkan/ prefix in the Android build (thanks Tapani)

v3:
 - don't list brw_defines.h in src/intel/Makefile.sources (Jason)
 - rebase on top of the oa patches

[Emil Velikov: commit message, various small fixes througout]
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/compiler/brw_fs_live_variables.h

@@ -0,0 +1,115 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ *
+ * 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.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "brw_fs.h"
+#include "util/bitset.h"
+
+struct cfg_t;
+
+namespace brw {
+
+struct block_data {
+   /**
+    * Which variables are defined before being used in the block.
+    *
+    * Note that for our purposes, "defined" means unconditionally, completely
+    * defined.
+    */
+   BITSET_WORD *def;
+
+   /**
+    * Which variables are used before being defined in the block.
+    */
+   BITSET_WORD *use;
+
+   /** Which defs reach the entry point of the block. */
+   BITSET_WORD *livein;
+
+   /** Which defs reach the exit point of the block. */
+   BITSET_WORD *liveout;
+
+   BITSET_WORD flag_def[1];
+   BITSET_WORD flag_use[1];
+   BITSET_WORD flag_livein[1];
+   BITSET_WORD flag_liveout[1];
+};
+
+class fs_live_variables {
+public:
+   DECLARE_RALLOC_CXX_OPERATORS(fs_live_variables)
+
+   fs_live_variables(fs_visitor *v, const cfg_t *cfg);
+   ~fs_live_variables();
+
+   bool vars_interfere(int a, int b);
+   int var_from_reg(const fs_reg &reg) const
+   {
+      return var_from_vgrf[reg.nr] + reg.offset / REG_SIZE;
+   }
+
+   /** Map from virtual GRF number to index in block_data arrays. */
+   int *var_from_vgrf;
+
+   /**
+    * Map from any index in block_data to the virtual GRF containing it.
+    *
+    * For alloc.sizes of [1, 2, 3], vgrf_from_var would contain
+    * [0, 1, 1, 2, 2, 2].
+    */
+   int *vgrf_from_var;
+
+   int num_vars;
+   int num_vgrfs;
+   int bitset_words;
+
+   /** @{
+    * Final computed live ranges for each var (each component of each virtual
+    * GRF).
+    */
+   int *start;
+   int *end;
+   /** @} */
+
+   /** Per-basic-block information on live variables */
+   struct block_data *block_data;
+
+protected:
+   void setup_def_use();
+   void setup_one_read(struct block_data *bd, fs_inst *inst, int ip,
+                       const fs_reg &reg);
+   void setup_one_write(struct block_data *bd, fs_inst *inst, int ip,
+                        const fs_reg &reg);
+   void compute_live_variables();
+   void compute_start_end();
+
+   fs_visitor *v;
+   const cfg_t *cfg;
+   void *mem_ctx;
+
+};
+
+} /* namespace brw */