path: root/src/gallium/drivers/vc4
diff options
authorIan Romanick <>2018-06-18 16:11:55 -0700
committerIan Romanick <>2018-12-17 13:47:06 -0800
commit378f9967710e9145f2a4f8eee89d87badbe0e6ea (patch)
treeeea53659babbc84c15da3357ab7c01f615c2d3a3 /src/gallium/drivers/vc4
parent8fb8ebfbb05d3323481c8ba6d320b3a3580bad99 (diff)
nir/opt_peephole_select: Don't peephole_select expensive math instructions
On some GPUs, especially older Intel GPUs, some math instructions are very expensive. On those architectures, don't reduce flow control to a csel if one of the branches contains one of these expensive math instructions. This prevents a bunch of cycle count regressions on pre-Gen6 platforms with a later patch (intel/compiler: More peephole select for pre-Gen6). v2: Remove stray #if block. Noticed by Thomas. Signed-off-by: Ian Romanick <> Reviewed-by: Thomas Helland <> Reviewed-by: Lionel Landwerlin <>
Diffstat (limited to 'src/gallium/drivers/vc4')
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c
index 48d83061f9a..fb75c07e266 100644
--- a/src/gallium/drivers/vc4/vc4_program.c
+++ b/src/gallium/drivers/vc4/vc4_program.c
@@ -1591,7 +1591,7 @@ vc4_optimize_nir(struct nir_shader *s)
NIR_PASS(progress, s, nir_opt_dce);
NIR_PASS(progress, s, nir_opt_dead_cf);
NIR_PASS(progress, s, nir_opt_cse);
- NIR_PASS(progress, s, nir_opt_peephole_select, 8, true);
+ NIR_PASS(progress, s, nir_opt_peephole_select, 8, true, true);
NIR_PASS(progress, s, nir_opt_algebraic);
NIR_PASS(progress, s, nir_opt_constant_folding);
NIR_PASS(progress, s, nir_opt_undef);