[Mesa-dev] [PATCH 9/9] i965: Use NIR by default for Fragment shaders on SNB+

[Jason Ekstrand]

GLSL IR vs. NIR FS instructions on snb:
total instructions in shared programs: 4976784 -> 4973072 (-0.07%)
instructions in affected programs:     3309521 -> 3305809 (-0.11%)
helped:                                7161
HURT:                                  9839
GAINED:                                55
LOST:                                  23

GLSL IR vs. NIR FS instructions on ivb:
total instructions in shared programs: 4593938 -> 4588496 (-0.12%)
instructions in affected programs:     2948822 -> 2943380 (-0.18%)
helped:                                6878
HURT:                                  8801
GAINED:                                69
LOST:                                  44

GLSL IR vs. NIR FS instructions on hsw:
total instructions in shared programs: 4089459 -> 4081368 (-0.20%)
instructions in affected programs:     2592474 -> 2584383 (-0.31%)
helped:                                6492
HURT:                                  9403
GAINED:                                69
LOST:                                  32

GLSL IR vs. NIR FS instructions on bdw:
total instructions in shared programs: 4065050 -> 4058653 (-0.16%)
instructions in affected programs:     2555555 -> 2549158 (-0.25%)
helped:                                5910
HURT:                                  9765
GAINED:                                45
LOST:                                  53
---
 src/mesa/drivers/dri/i965/brw_fs.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp
index 3d4d31a..42f6604 100644
--- a/src/mesa/drivers/dri/i965/brw_fs.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
@@ -3943,7 +3943,7 @@ fs_visitor::run_fs()
        * functions called "main").
        */
       if (shader) {
-         if (env_var_as_boolean("INTEL_USE_NIR", false)) {
+         if (env_var_as_boolean("INTEL_USE_NIR", brw->gen >= 6)) {
             emit_nir_code();
          } else {
             foreach_in_list(ir_instruction, ir, shader->base.ir) {
-- 
2.3.2