llvmpipe: generate two shader varients, one omits triangle in/out testing

When we know that a 4x4 pixel block is entirely inside of a triangle
use the jit function which omits the in/out test code.

Results in a few percent speedup in many tests.

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_rast.h b/src/gallium/drivers/llvmpipe/lp_rast.h
index d926adb6b2..2a97fe4c67 100644
--- a/src/gallium/drivers/llvmpipe/lp_rast.h
+++ b/src/gallium/drivers/llvmpipe/lp_rast.h
@@ -66,8 +66,10 @@ struct lp_rast_state {
    
    /* The shader itself.  Probably we also need to pass a pointer to
     * the tile color/z/stencil data somehow:
-    */
-   lp_jit_frag_func jit_function;
+    * jit_function[0] skips the triangle in/out test code
+    * jit_function[1] does triangle in/out testing
+     */
+   lp_jit_frag_func jit_function[2];
 
    boolean opaque;
 };