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nir: bump loop unroll limit to 96.

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With the ssao demo from Vulkan demos:
radv/rx480: 440->440fps
anv/haswell: 24->34 fps

The demo does a 0->32 loop across a ubo with 32 members.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2017-10-11 09:48:21 +10:00
parent 5be3fdfa32
commit 2d36efdb7f
1 changed files with 3 additions and 1 deletions
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4
src/compiler/nir/nir_opt_loop_unroll.c
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@ -33,8 +33,10 @@
* to give about the same results. Around 5 instructions per node. But some
* loops that would unroll with GLSL IR fail to unroll if we set this to 25 so
* we set it to 26.
* This was bumped to 96 because it unrolled more loops with a positive
* effect (vulkan ssao demo).
*/
#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