i965/vs: Avoid generating a MOV for most ir_assignment handling.

Removes an average of 11.5% of instructions in 54% of vertex shaders
in shader-db.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_vec4.h b/src/mesa/drivers/dri/i965/brw_vec4.h
index 082021513d2..620b05570a6 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.h
+++ b/src/mesa/drivers/dri/i965/brw_vec4.h
@@ -388,6 +388,12 @@ public:
    vec4_instruction *emit(enum opcode opcode, dst_reg dst,
 			  src_reg src0, src_reg src1, src_reg src2);
 
+   bool try_rewrite_rhs_to_dst(ir_assignment *ir,
+			       dst_reg dst,
+			       src_reg src,
+			       vec4_instruction *pre_rhs_inst,
+			       vec4_instruction *last_rhs_inst);
+
    /** Walks an exec_list of ir_instruction and sends it through this visitor. */
    void visit_instructions(const exec_list *list);