gallium: replace PIPE_SHADER_CAP_INDIRECT_INPUT/OUTPUT_ADDR with NIR options

This is a prerequisite for enabling nir_opt_varyings for all gallium
drivers.

nir_lower_io_passes (called by the GLSL linker) only uses NIR options
to lower indirect IO access before lowering IO and calling
nir_opt_varyings.

Most drivers report full support for indirect IO and lower it themselves,
which prevents compaction of lowered indirectly accessed varyings because
nir_opt_varyings doesn't touch indirect varyings.

Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> (Rb for asahi)
Reviewed-by: Pavel Ondračka <pavel.ondracka@gmail.com> (for r300)
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32423>

src/intel/compiler/brw_compiler.c

@@ -79,6 +79,8 @@ const struct nir_shader_compiler_options brw_scalar_nir_options = {
    .vectorize_tess_levels = true,
    .vertex_id_zero_based = true,
    .scalarize_ddx = true,
+   .support_indirect_inputs = (uint8_t)BITFIELD_MASK(PIPE_SHADER_TYPES),
+   .support_indirect_outputs = (uint8_t)BITFIELD_MASK(PIPE_SHADER_TYPES),
 };
 
 struct brw_compiler *

src/intel/compiler/elk/elk_compiler.c

@@ -122,6 +122,8 @@ elk_compiler_create(void *mem_ctx, const struct intel_device_info *devinfo)
       nir_options->lower_doubles_options = fp64_options;
 
       nir_options->unify_interfaces = i < MESA_SHADER_FRAGMENT;
+      nir_options->support_indirect_inputs = (uint8_t)BITFIELD_MASK(PIPE_SHADER_TYPES),
+      nir_options->support_indirect_outputs = (uint8_t)BITFIELD_MASK(PIPE_SHADER_TYPES),
 
       nir_options->force_indirect_unrolling |=
          elk_nir_no_indirect_mask(compiler, i);

src/intel/compiler/elk/elk_nir_options.c

@@ -31,7 +31,9 @@
    .vertex_id_zero_based = true,                                              \
    .lower_base_vertex = true,                                                 \
    .support_16bit_alu = true,                                                 \
-   .lower_uniforms_to_ubo = true
+   .lower_uniforms_to_ubo = true,                                             \
+   .support_indirect_inputs = (uint8_t)BITFIELD_MASK(PIPE_SHADER_TYPES),      \
+   .support_indirect_outputs = (uint8_t)BITFIELD_MASK(PIPE_SHADER_TYPES)
 
 #define COMMON_SCALAR_OPTIONS                                                 \
    .lower_to_scalar = true,                                                   \