Mesa (main): radeonsi: enable use_waterfall_for_divergent_tex_samplers

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Module: Mesa
Branch: main
Commit: dad36b5f12414ebd3e83af16aa67dbf280cd9551
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=dad36b5f12414ebd3e83af16aa67dbf280cd9551

Author: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
Date:   Wed May 25 16:05:39 2022 +0200

radeonsi: enable use_waterfall_for_divergent_tex_samplers

And run the nir_divergence_analysis pass in si_get_nir_shader to make
sure it's up to date.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/2253
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16709>

---

 src/gallium/drivers/radeonsi/si_shader.c      | 2 ++
 src/gallium/drivers/radeonsi/si_shader_llvm.c | 1 +
 2 files changed, 3 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 4b1c3f7f7ce..cde217ffd25 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -1608,6 +1608,8 @@ struct nir_shader *si_get_nir_shader(struct si_shader_selector *sel,
    if (progress || progress2)
       si_nir_late_opts(nir);
 
+   NIR_PASS_V(nir, nir_divergence_analysis);
+
    /* This helps LLVM form VMEM clauses and thus get more GPU cache hits.
     * 200 is tuned for Viewperf. It should be done last.
     */
diff --git a/src/gallium/drivers/radeonsi/si_shader_llvm.c b/src/gallium/drivers/radeonsi/si_shader_llvm.c
index fed85ad7b5a..9f94403d33b 100644
--- a/src/gallium/drivers/radeonsi/si_shader_llvm.c
+++ b/src/gallium/drivers/radeonsi/si_shader_llvm.c
@@ -1063,6 +1063,7 @@ bool si_llvm_translate_nir(struct si_shader_context *ctx, struct si_shader *shad
    ctx->abi.load_grid_size_from_user_sgpr = true;
    ctx->abi.clamp_div_by_zero = ctx->screen->options.clamp_div_by_zero ||
                                 info->options & SI_PROFILE_CLAMP_DIV_BY_ZERO;
+   ctx->abi.use_waterfall_for_divergent_tex_samplers = true;
 
    for (unsigned i = 0; i < info->num_outputs; i++) {
       LLVMTypeRef type = ctx->ac.f32;