i965/vs: Add vec4_instruction::is_tex() query.

Copy and pasted from fs_inst::is_tex(), but without TXB.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>

src/mesa/drivers/dri/i965/brw_vec4.cpp

@@ -31,6 +31,16 @@ extern "C" {
 
 namespace brw {
 
+bool
+vec4_instruction::is_tex()
+{
+   return (opcode == SHADER_OPCODE_TEX ||
+	   opcode == SHADER_OPCODE_TXD ||
+	   opcode == SHADER_OPCODE_TXF ||
+	   opcode == SHADER_OPCODE_TXL ||
+	   opcode == SHADER_OPCODE_TXS);
+}
+
 bool
 vec4_instruction::is_math()
 {

src/mesa/drivers/dri/i965/brw_vec4.h

@@ -276,6 +276,7 @@ public:
    ir_instruction *ir;
    const char *annotation;
 
+   bool is_tex();
    bool is_math();
 };