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radv: Use constant for ray traversal exit condition.

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Make the stack base ssa def dead in the loop, can save a register.

Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18538>
This commit is contained in:
Bas Nieuwenhuizen 2022-09-11 16:48:58 +02:00
parent 40a235c9a8
commit 91a4cd26b3
1 changed files with 2 additions and 1 deletions
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3
src/amd/vulkan/radv_pipeline_rt.c
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@ -1404,6 +1404,7 @@ build_traversal_shader(struct radv_device *device,
nir_ssa_def *stack_base =
nir_iadd_imm(&b, nir_imul_imm(&b, nir_load_local_invocation_index(&b), stack_entry_size),
b.shader->info.shared_size);
nir_ssa_def *stack_exit_bound = nir_imm_int(&b, stack_entry_stride + b.shader->info.shared_size);
b.shader->info.shared_size += stack_entry_stride * MAX_STACK_ENTRY_COUNT;
@ -1438,7 +1439,7 @@ build_traversal_shader(struct radv_device *device,
nir_push_if(&b, nir_ieq_imm(&b, nir_load_var(&b, trav_vars.current_node), -1));
{
nir_push_if(&b, nir_ieq(&b, nir_load_var(&b, trav_vars.stack), stack_base));
nir_push_if(&b, nir_ilt(&b, nir_load_var(&b, trav_vars.stack), stack_exit_bound));
nir_jump(&b, nir_jump_break);
nir_pop_if(&b, NULL);