[Mesa-dev] [PATCH 2/2] [rfc] nir: bump unroll instruction count to 96.

[Dave Airlie]

From: Dave Airlie <airlied at redhat.com>

This gets the ssao demo from 400->440 fps on radv with the
previous patch.

Now the demo does a 0->32 loop across a ubo with 32 members,
I don't know if we still have that sort of information available
about the UBO in question at this stage. Maybe someone more
familiar with spir-v/nir can tell if we can access that info
then we can force a loop unroll like we do for var arrays.

Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 src/compiler/nir/nir_opt_loop_unroll.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir_opt_loop_unroll.c b/src/compiler/nir/nir_opt_loop_unroll.c
index 79d04f9..6158d58 100644
--- a/src/compiler/nir/nir_opt_loop_unroll.c
+++ b/src/compiler/nir/nir_opt_loop_unroll.c
@@ -34,7 +34,7 @@
  * loops that would unroll with GLSL IR fail to unroll if we set this to 25 so
  * we set it to 26.
  */
-#define LOOP_UNROLL_LIMIT 26
+#define LOOP_UNROLL_LIMIT 96
 
 /* Prepare this loop for unrolling by first converting to lcssa and then
  * converting the phis from the loops first block and the block that follows
-- 
2.9.4