radv: handle loc->indirect correctly for the first descriptor

This was wrong for descriptor #0 when all of them are indirect.
This is because indirect_offset was 0 and we emitted a
"normal" descriptor pointer for nothing.

While we are at it remove
radv_userdata_info::indirect_offset which is useless.

CC: 18.2 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
(cherry picked from commit aa30205929)

src/amd/vulkan/radv_nir_to_llvm.c

@@ -545,13 +545,12 @@ create_llvm_function(LLVMContextRef ctx, LLVMModuleRef module,
 
 
 static void
-set_loc(struct radv_userdata_info *ud_info, uint8_t *sgpr_idx, uint8_t num_sgprs,
-	uint32_t indirect_offset)
+set_loc(struct radv_userdata_info *ud_info, uint8_t *sgpr_idx,
+	uint8_t num_sgprs, bool indirect)
 {
 	ud_info->sgpr_idx = *sgpr_idx;
 	ud_info->num_sgprs = num_sgprs;
-	ud_info->indirect = indirect_offset > 0;
-	ud_info->indirect_offset = indirect_offset;
+	ud_info->indirect = indirect;
 	*sgpr_idx += num_sgprs;
 }
 
@@ -563,7 +562,7 @@ set_loc_shader(struct radv_shader_context *ctx, int idx, uint8_t *sgpr_idx,
 		&ctx->shader_info->user_sgprs_locs.shader_data[idx];
 	assert(ud_info);
 
-	set_loc(ud_info, sgpr_idx, num_sgprs, 0);
+	set_loc(ud_info, sgpr_idx, num_sgprs, false);
 }
 
 static void
@@ -577,15 +576,16 @@ set_loc_shader_ptr(struct radv_shader_context *ctx, int idx, uint8_t *sgpr_idx)
 
 static void
 set_loc_desc(struct radv_shader_context *ctx, int idx,  uint8_t *sgpr_idx,
-	     uint32_t indirect_offset)
+	     bool indirect)
 {
 	struct radv_userdata_locations *locs =
 		&ctx->shader_info->user_sgprs_locs;
 	struct radv_userdata_info *ud_info = &locs->descriptor_sets[idx];
 	assert(ud_info);
 
-	set_loc(ud_info, sgpr_idx, HAVE_32BIT_POINTERS ? 1 : 2, indirect_offset);
-	if (indirect_offset == 0)
+	set_loc(ud_info, sgpr_idx, HAVE_32BIT_POINTERS ? 1 : 2, indirect);
+
+	if (!indirect)
 		locs->descriptor_sets_enabled |= 1 << idx;
 }
 
@@ -806,7 +806,7 @@ set_global_input_locs(struct radv_shader_context *ctx, gl_shader_stage stage,
 		for (unsigned i = 0; i < num_sets; ++i) {
 			if ((ctx->shader_info->info.desc_set_used_mask & (1 << i)) &&
 			    ctx->options->layout->set[i].layout->shader_stages & stage_mask) {
-				set_loc_desc(ctx, i, user_sgpr_idx, 0);
+				set_loc_desc(ctx, i, user_sgpr_idx, false);
 			} else
 				ctx->descriptor_sets[i] = NULL;
 		}
@@ -817,7 +817,7 @@ set_global_input_locs(struct radv_shader_context *ctx, gl_shader_stage stage,
 		for (unsigned i = 0; i < num_sets; ++i) {
 			if ((ctx->shader_info->info.desc_set_used_mask & (1 << i)) &&
 			    ctx->options->layout->set[i].layout->shader_stages & stage_mask) {
-				set_loc_desc(ctx, i, user_sgpr_idx, i * 8);
+				set_loc_desc(ctx, i, user_sgpr_idx, true);
 				ctx->descriptor_sets[i] =
 					ac_build_load_to_sgpr(&ctx->ac,
 							      desc_sets,

src/amd/vulkan/radv_shader.h

@@ -192,7 +192,6 @@ struct radv_userdata_info {
 	int8_t sgpr_idx;
 	uint8_t num_sgprs;
 	bool indirect;
-	uint32_t indirect_offset;
 };
 
 struct radv_userdata_locations {