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diff --git a/src/compiler/nir/nir_search.h b/src/compiler/nir/nir_search.h
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+/*
+ * Copyright © 2014 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:
+ *    Jason Ekstrand ([email protected])
+ *
+ */
+
+#ifndef _NIR_SEARCH_
+#define _NIR_SEARCH_
+
+#include "nir.h"
+
+#define NIR_SEARCH_MAX_VARIABLES 16
+
+typedef enum {
+   nir_search_value_expression,
+   nir_search_value_variable,
+   nir_search_value_constant,
+} nir_search_value_type;
+
+typedef struct {
+   nir_search_value_type type;
+} nir_search_value;
+
+typedef struct {
+   nir_search_value value;
+
+   /** The variable index;  Must be less than NIR_SEARCH_MAX_VARIABLES */
+   unsigned variable;
+
+   /** Indicates that the given variable must be a constant
+    *
+    * This is only alloed in search expressions and indicates that the
+    * given variable is only allowed to match constant values.
+    */
+   bool is_constant;
+
+   /** Indicates that the given variable must have a certain type
+    *
+    * This is only allowed in search expressions and indicates that the
+    * given variable is only allowed to match values that come from an ALU
+    * instruction with the given output type.  A type of nir_type_void
+    * means it can match any type.
+    *
+    * Note: A variable that is both constant and has a non-void type will
+    * never match anything.
+    */
+   nir_alu_type type;
+} nir_search_variable;
+
+typedef struct {
+   nir_search_value value;
+
+   union {
+      uint32_t u;
+      int32_t i;
+      float f;
+   } data;
+} nir_search_constant;
+
+typedef struct {
+   nir_search_value value;
+
+   nir_op opcode;
+   const nir_search_value *srcs[4];
+} nir_search_expression;
+
+NIR_DEFINE_CAST(nir_search_value_as_variable, nir_search_value,
+                nir_search_variable, value)
+NIR_DEFINE_CAST(nir_search_value_as_constant, nir_search_value,
+                nir_search_constant, value)
+NIR_DEFINE_CAST(nir_search_value_as_expression, nir_search_value,
+                nir_search_expression, value)
+
+nir_alu_instr *
+nir_replace_instr(nir_alu_instr *instr, const nir_search_expression *search,
+                  const nir_search_value *replace, void *mem_ctx);
+
+#endif /* _NIR_SEARCH_ */