Commit 3bf8981c authored by Connor Abbott's avatar Connor Abbott

ac,radeonsi: Always mark buffer stores as inaccessiblememonly

inaccessiblememonly means that it doesn't modify memory accesible via
normal LLVM pointers. This lets LLVM's dead store elimination, memcpy
forwarding, etc. ignore functions with this attribute. We don't
represent descriptors as pointers, so this property is always true of
buffer and image stores. There are plans to represent descriptors via
pointers, but this just means that now nothing is inaccessiblememonly,
as LLVM will then understand loads/stores via its usual alias analysis.

Radeonsi was mistakenly only setting it if the driver could prove that
there were no reads, and then it was cargo-culted into ac_llvm_build
and ac_llvm_to_nir. Rip it out of everything.

statistics with nir enabled:

Totals from affected shaders:
SGPRS: 152 -> 152 (0.00 %)
VGPRS: 128 -> 132 (3.12 %)
Spilled SGPRs: 0 -> 0 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 9324 -> 9244 (-0.86 %) bytes
LDS: 2 -> 2 (0.00 %) blocks
Max Waves: 17 -> 17 (0.00 %)
Wait states: 0 -> 0 (0.00 %)

The only difference was a manhattan31 shader.
Acked-by: Timothy Arceri's avatarTimothy Arceri <tarceri@itsqueeze.com>
Acked-by: default avatarNicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: default avatarMarek Olšák <marek.olsak@amd.com>
parent 4db2c1e2
......@@ -1116,7 +1116,6 @@ ac_build_llvm7_buffer_store_common(struct ac_llvm_context *ctx,
unsigned num_channels,
bool glc,
bool slc,
bool writeonly_memory,
bool use_format)
{
LLVMValueRef args[] = {
......@@ -1141,7 +1140,7 @@ ac_build_llvm7_buffer_store_common(struct ac_llvm_context *ctx,
}
ac_build_intrinsic(ctx, name, ctx->voidt, args, ARRAY_SIZE(args),
ac_get_store_intr_attribs(writeonly_memory));
AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY);
}
static void
......@@ -1155,7 +1154,6 @@ ac_build_llvm8_buffer_store_common(struct ac_llvm_context *ctx,
LLVMTypeRef return_channel_type,
bool glc,
bool slc,
bool writeonly_memory,
bool use_format,
bool structurized)
{
......@@ -1184,7 +1182,7 @@ ac_build_llvm8_buffer_store_common(struct ac_llvm_context *ctx,
}
ac_build_intrinsic(ctx, name, ctx->voidt, args, idx,
ac_get_store_intr_attribs(writeonly_memory));
AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY);
}
void
......@@ -1195,18 +1193,17 @@ ac_build_buffer_store_format(struct ac_llvm_context *ctx,
LLVMValueRef voffset,
unsigned num_channels,
bool glc,
bool slc,
bool writeonly_memory)
bool slc)
{
if (HAVE_LLVM >= 0x800) {
ac_build_llvm8_buffer_store_common(ctx, rsrc, data, vindex,
voffset, NULL, num_channels,
ctx->f32, glc, slc,
writeonly_memory, true, true);
true, true);
} else {
ac_build_llvm7_buffer_store_common(ctx, rsrc, data, vindex, voffset,
num_channels, glc, slc,
writeonly_memory, true);
true);
}
}
......@@ -1224,7 +1221,6 @@ ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
unsigned inst_offset,
bool glc,
bool slc,
bool writeonly_memory,
bool swizzle_enable_hint)
{
/* Split 3 channel stores, because only LLVM 9+ support 3-channel
......@@ -1240,11 +1236,11 @@ ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
ac_build_buffer_store_dword(ctx, rsrc, v01, 2, voffset,
soffset, inst_offset, glc, slc,
writeonly_memory, swizzle_enable_hint);
swizzle_enable_hint);
ac_build_buffer_store_dword(ctx, rsrc, v[2], 1, voffset,
soffset, inst_offset + 8,
glc, slc,
writeonly_memory, swizzle_enable_hint);
swizzle_enable_hint);
return;
}
......@@ -1267,7 +1263,6 @@ ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
num_channels,
ctx->f32,
glc, slc,
writeonly_memory,
false, false);
} else {
if (voffset)
......@@ -1277,7 +1272,7 @@ ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
ac_to_float(ctx, vdata),
ctx->i32_0, offset,
num_channels, glc, slc,
writeonly_memory, false);
false);
}
return;
}
......@@ -1294,7 +1289,7 @@ ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset,
immoffset, num_channels, dfmt, nfmt, glc,
slc, writeonly_memory);
slc);
}
static LLVMValueRef
......@@ -2000,7 +1995,6 @@ ac_build_llvm8_tbuffer_store(struct ac_llvm_context *ctx,
unsigned nfmt,
bool glc,
bool slc,
bool writeonly_memory,
bool structurized)
{
LLVMValueRef args[7];
......@@ -2024,7 +2018,7 @@ ac_build_llvm8_tbuffer_store(struct ac_llvm_context *ctx,
indexing_kind, type_name);
ac_build_intrinsic(ctx, name, ctx->voidt, args, idx,
ac_get_store_intr_attribs(writeonly_memory));
AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY);
}
static void
......@@ -2040,7 +2034,6 @@ ac_build_tbuffer_store(struct ac_llvm_context *ctx,
unsigned nfmt,
bool glc,
bool slc,
bool writeonly_memory,
bool structurized) /* only matters for LLVM 8+ */
{
if (HAVE_LLVM >= 0x800) {
......@@ -2050,8 +2043,7 @@ ac_build_tbuffer_store(struct ac_llvm_context *ctx,
ac_build_llvm8_tbuffer_store(ctx, rsrc, vdata, vindex, voffset,
soffset, num_channels, dfmt, nfmt,
glc, slc, writeonly_memory,
structurized);
glc, slc, structurized);
} else {
LLVMValueRef params[] = {
vdata,
......@@ -2073,7 +2065,7 @@ ac_build_tbuffer_store(struct ac_llvm_context *ctx,
type_names[func]);
ac_build_intrinsic(ctx, name, ctx->voidt, params, 10,
ac_get_store_intr_attribs(writeonly_memory));
AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY);
}
}
......@@ -2089,12 +2081,11 @@ ac_build_struct_tbuffer_store(struct ac_llvm_context *ctx,
unsigned dfmt,
unsigned nfmt,
bool glc,
bool slc,
bool writeonly_memory)
bool slc)
{
ac_build_tbuffer_store(ctx, rsrc, vdata, vindex, voffset, soffset,
immoffset, num_channels, dfmt, nfmt, glc, slc,
writeonly_memory, true);
true);
}
void
......@@ -2108,12 +2099,11 @@ ac_build_raw_tbuffer_store(struct ac_llvm_context *ctx,
unsigned dfmt,
unsigned nfmt,
bool glc,
bool slc,
bool writeonly_memory)
bool slc)
{
ac_build_tbuffer_store(ctx, rsrc, vdata, NULL, voffset, soffset,
immoffset, num_channels, dfmt, nfmt, glc, slc,
writeonly_memory, false);
false);
}
void
......@@ -2122,8 +2112,7 @@ ac_build_tbuffer_store_short(struct ac_llvm_context *ctx,
LLVMValueRef vdata,
LLVMValueRef voffset,
LLVMValueRef soffset,
bool glc,
bool writeonly_memory)
bool glc)
{
vdata = LLVMBuildBitCast(ctx->builder, vdata, ctx->i16, "");
......@@ -2132,8 +2121,7 @@ ac_build_tbuffer_store_short(struct ac_llvm_context *ctx,
ac_build_llvm8_buffer_store_common(ctx, rsrc, vdata, NULL,
voffset, soffset, 1,
ctx->i16, glc, false,
writeonly_memory, false,
false);
false, false);
} else {
unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_16;
unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT;
......@@ -2141,8 +2129,8 @@ ac_build_tbuffer_store_short(struct ac_llvm_context *ctx,
vdata = LLVMBuildZExt(ctx->builder, vdata, ctx->i32, "");
ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset,
ctx->i32_0, 1, dfmt, nfmt, glc, false,
writeonly_memory);
ctx->i32_0, 1, dfmt, nfmt, glc,
false);
}
}
......@@ -2152,8 +2140,7 @@ ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
LLVMValueRef vdata,
LLVMValueRef voffset,
LLVMValueRef soffset,
bool glc,
bool writeonly_memory)
bool glc)
{
vdata = LLVMBuildBitCast(ctx->builder, vdata, ctx->i8, "");
......@@ -2162,8 +2149,7 @@ ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
ac_build_llvm8_buffer_store_common(ctx, rsrc, vdata, NULL,
voffset, soffset, 1,
ctx->i8, glc, false,
writeonly_memory, false,
false);
false, false);
} else {
unsigned dfmt = V_008F0C_BUF_DATA_FORMAT_8;
unsigned nfmt = V_008F0C_BUF_NUM_FORMAT_UINT;
......@@ -2171,8 +2157,7 @@ ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
vdata = LLVMBuildZExt(ctx->builder, vdata, ctx->i32, "");
ac_build_raw_tbuffer_store(ctx, rsrc, vdata, voffset, soffset,
ctx->i32_0, 1, dfmt, nfmt, glc, false,
writeonly_memory);
ctx->i32_0, 1, dfmt, nfmt, glc, false);
}
}
/**
......
......@@ -271,7 +271,6 @@ ac_build_buffer_store_dword(struct ac_llvm_context *ctx,
unsigned inst_offset,
bool glc,
bool slc,
bool writeonly_memory,
bool swizzle_enable_hint);
void
......@@ -282,8 +281,7 @@ ac_build_buffer_store_format(struct ac_llvm_context *ctx,
LLVMValueRef voffset,
unsigned num_channels,
bool glc,
bool slc,
bool writeonly_memory);
bool slc);
LLVMValueRef
ac_build_buffer_load(struct ac_llvm_context *ctx,
......@@ -395,8 +393,7 @@ ac_build_tbuffer_store_short(struct ac_llvm_context *ctx,
LLVMValueRef vdata,
LLVMValueRef voffset,
LLVMValueRef soffset,
bool glc,
bool writeonly_memory);
bool glc);
void
ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
......@@ -404,8 +401,7 @@ ac_build_tbuffer_store_byte(struct ac_llvm_context *ctx,
LLVMValueRef vdata,
LLVMValueRef voffset,
LLVMValueRef soffset,
bool glc,
bool writeonly_memory);
bool glc);
void
ac_build_struct_tbuffer_store(struct ac_llvm_context *ctx,
......@@ -419,8 +415,7 @@ ac_build_struct_tbuffer_store(struct ac_llvm_context *ctx,
unsigned dfmt,
unsigned nfmt,
bool glc,
bool slc,
bool writeonly_memory);
bool slc);
void
ac_build_raw_tbuffer_store(struct ac_llvm_context *ctx,
......@@ -433,8 +428,7 @@ ac_build_raw_tbuffer_store(struct ac_llvm_context *ctx,
unsigned dfmt,
unsigned nfmt,
bool glc,
bool slc,
bool writeonly_memory);
bool slc);
LLVMValueRef
ac_get_thread_id(struct ac_llvm_context *ctx);
......
......@@ -120,13 +120,6 @@ ac_get_load_intr_attribs(bool can_speculate)
AC_FUNC_ATTR_READONLY;
}
static inline unsigned
ac_get_store_intr_attribs(bool writeonly_memory)
{
return writeonly_memory ? AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY :
AC_FUNC_ATTR_WRITEONLY;
}
unsigned
ac_count_scratch_private_memory(LLVMValueRef function);
......
......@@ -1622,13 +1622,11 @@ static void visit_store_ssbo(struct ac_nir_context *ctx,
if (num_bytes == 1) {
ac_build_tbuffer_store_byte(&ctx->ac, rsrc, data,
offset, ctx->ac.i32_0,
cache_policy & ac_glc,
writeonly_memory);
cache_policy & ac_glc);
} else if (num_bytes == 2) {
ac_build_tbuffer_store_short(&ctx->ac, rsrc, data,
offset, ctx->ac.i32_0,
cache_policy & ac_glc,
writeonly_memory);
cache_policy & ac_glc);
} else {
int num_channels = num_bytes / 4;
......@@ -1654,8 +1652,7 @@ static void visit_store_ssbo(struct ac_nir_context *ctx,
num_channels, offset,
ctx->ac.i32_0, 0,
cache_policy & ac_glc,
false, writeonly_memory,
false);
false, false);
}
}
}
......@@ -2556,8 +2553,7 @@ static void visit_image_store(struct ac_nir_context *ctx,
ac_build_buffer_store_format(&ctx->ac, rsrc, src, vindex,
ctx->ac.i32_0, src_channels,
args.cache_policy & ac_glc, false,
writeonly_memory);
args.cache_policy & ac_glc, false);
} else {
args.opcode = ac_image_store;
args.data[0] = ac_to_float(&ctx->ac, get_src(ctx, instr->src[3]));
......
......@@ -1585,13 +1585,13 @@ store_tcs_output(struct ac_shader_abi *abi,
if (!is_tess_factor && writemask != 0xF)
ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, value, 1,
buf_addr, ctx->oc_lds,
4 * (base + chan), 1, 0, true, false);
4 * (base + chan), 1, 0, false);
}
if (writemask == 0xF) {
ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, src, 4,
buf_addr, ctx->oc_lds,
(base * 4), 1, 0, true, false);
(base * 4), 1, 0, false);
}
}
......@@ -1858,7 +1858,7 @@ visit_emit_vertex(struct ac_shader_abi *abi, unsigned stream, LLVMValueRef *addr
ctx->gsvs_ring[stream],
out_val, 1,
voffset, ctx->gs2vs_offset, 0,
1, 1, true, true);
1, 1, true);
}
}
......@@ -2773,7 +2773,7 @@ radv_emit_stream_output(struct radv_shader_context *ctx,
ac_build_buffer_store_dword(&ctx->ac, so_buffers[buf],
vdata, num_comps, so_write_offsets[buf],
ctx->ac.i32_0, offset,
1, 1, true, false);
1, 1, false);
}
static void
......@@ -3150,7 +3150,7 @@ handle_es_outputs_post(struct radv_shader_context *ctx,
out_val, 1,
NULL, ctx->es2gs_offset,
(4 * param_index + j) * 4,
1, 1, true, true);
1, 1, true);
}
}
}
......@@ -3283,7 +3283,7 @@ write_tess_factors(struct radv_shader_context *ctx)
ac_build_buffer_store_dword(&ctx->ac, buffer,
LLVMConstInt(ctx->ac.i32, 0x80000000, false),
1, ctx->ac.i32_0, tf_base,
0, 1, 0, true, false);
0, 1, 0, false);
tf_offset += 4;
ac_nir_build_endif(&inner_if_ctx);
......@@ -3292,11 +3292,11 @@ write_tess_factors(struct radv_shader_context *ctx)
/* Store the tessellation factors. */
ac_build_buffer_store_dword(&ctx->ac, buffer, vec0,
MIN2(stride, 4), byteoffset, tf_base,
tf_offset, 1, 0, true, false);
tf_offset, 1, 0, false);
if (vec1)
ac_build_buffer_store_dword(&ctx->ac, buffer, vec1,
stride - 4, byteoffset, tf_base,
16 + tf_offset, 1, 0, true, false);
16 + tf_offset, 1, 0, false);
//store to offchip for TES to read - only if TES reads them
if (ctx->options->key.tcs.tes_reads_tess_factors) {
......@@ -3313,7 +3313,7 @@ write_tess_factors(struct radv_shader_context *ctx)
ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, outer_vec,
outer_comps, tf_outer_offset,
ctx->oc_lds, 0, 1, 0, true, false);
ctx->oc_lds, 0, 1, 0, false);
if (inner_comps) {
param_inner = shader_io_get_unique_index(VARYING_SLOT_TESS_LEVEL_INNER);
tf_inner_offset = get_tcs_tes_buffer_address(ctx, NULL,
......@@ -3323,7 +3323,7 @@ write_tess_factors(struct radv_shader_context *ctx)
ac_build_gather_values(&ctx->ac, inner, inner_comps);
ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, inner_vec,
inner_comps, tf_inner_offset,
ctx->oc_lds, 0, 1, 0, true, false);
ctx->oc_lds, 0, 1, 0, false);
}
}
ac_nir_build_endif(&if_ctx);
......
......@@ -811,7 +811,7 @@ void si_build_prim_discard_compute_shader(struct si_shader_context *ctx)
};
LLVMValueRef rsrc = ac_build_gather_values(&ctx->ac, desc, 4);
ac_build_buffer_store_dword(&ctx->ac, rsrc, count, 1, ctx->i32_0,
ctx->i32_0, 0, true, true, true, false);
ctx->i32_0, 0, true, true, false);
} else {
LLVMBuildStore(builder, count,
si_expand_32bit_pointer(ctx, vertex_count_addr));
......@@ -864,7 +864,7 @@ void si_build_prim_discard_compute_shader(struct si_shader_context *ctx)
ac_build_buffer_store_format(&ctx->ac, output_indexbuf, vdata,
vindex, ctx->i32_0, 3, true,
INDEX_STORES_USE_SLC, true);
INDEX_STORES_USE_SLC);
}
lp_build_endif(&if_accepted);
......
......@@ -1351,7 +1351,7 @@ static void store_output_tcs(struct lp_build_tgsi_context *bld_base,
if (reg->Register.WriteMask != 0xF && !is_tess_factor) {
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 1,
buf_addr, base,
4 * chan_index, 1, 0, true, false);
4 * chan_index, 1, 0, false);
}
/* Write tess factors into VGPRs for the epilog. */
......@@ -1371,7 +1371,7 @@ static void store_output_tcs(struct lp_build_tgsi_context *bld_base,
LLVMValueRef value = ac_build_gather_values(&ctx->ac,
values, 4);
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 4, buf_addr,
base, 0, 1, 0, true, false);
base, 0, 1, 0, false);
}
}
......@@ -1479,7 +1479,7 @@ static void si_nir_store_output_tcs(struct ac_shader_abi *abi,
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 1,
addr, base,
4 * buffer_store_offset,
1, 0, true, false);
1, 0, false);
}
/* Write tess factors into VGPRs for the epilog. */
......@@ -1499,7 +1499,7 @@ static void si_nir_store_output_tcs(struct ac_shader_abi *abi,
LLVMValueRef value = ac_build_gather_values(&ctx->ac,
values, 4);
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 4, addr,
base, 0, 1, 0, true, false);
base, 0, 1, 0, false);
}
}
......@@ -2660,7 +2660,7 @@ static void emit_streamout_output(struct si_shader_context *ctx,
vdata, num_comps,
so_write_offsets[buf_idx],
ctx->i32_0,
stream_out->dst_offset * 4, 1, 1, true, false);
stream_out->dst_offset * 4, 1, 1, false);
}
/**
......@@ -3054,7 +3054,7 @@ static void si_copy_tcs_inputs(struct lp_build_tgsi_context *bld_base)
LLVMValueRef value = lshs_lds_load(bld_base, ctx->ac.i32, ~0, lds_ptr);
ac_build_buffer_store_dword(&ctx->ac, buffer, value, 4, buffer_addr,
buffer_offset, 0, 1, 0, true, false);
buffer_offset, 0, 1, 0, false);
}
}
......@@ -3180,7 +3180,7 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
ac_build_buffer_store_dword(&ctx->ac, buffer,
LLVMConstInt(ctx->i32, 0x80000000, 0),
1, ctx->i32_0, tf_base,
offset, 1, 0, true, false);
offset, 1, 0, false);
offset += 4;
}
......@@ -3189,12 +3189,12 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
/* Store the tessellation factors. */
ac_build_buffer_store_dword(&ctx->ac, buffer, vec0,
MIN2(stride, 4), byteoffset, tf_base,
offset, 1, 0, true, false);
offset, 1, 0, false);
offset += 16;
if (vec1)
ac_build_buffer_store_dword(&ctx->ac, buffer, vec1,
stride - 4, byteoffset, tf_base,
offset, 1, 0, true, false);
offset, 1, 0, false);
/* Store the tess factors into the offchip buffer if TES reads them. */
if (shader->key.part.tcs.epilog.tes_reads_tess_factors) {
......@@ -3217,7 +3217,7 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
ac_build_buffer_store_dword(&ctx->ac, buf, outer_vec,
outer_comps, tf_outer_offset,
base, 0, 1, 0, true, false);
base, 0, 1, 0, false);
if (inner_comps) {
param_inner = si_shader_io_get_unique_index_patch(
TGSI_SEMANTIC_TESSINNER, 0);
......@@ -3228,7 +3228,7 @@ static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
ac_build_gather_values(&ctx->ac, inner, inner_comps);
ac_build_buffer_store_dword(&ctx->ac, buf, inner_vec,
inner_comps, tf_inner_offset,
base, 0, 1, 0, true, false);
base, 0, 1, 0, false);
}
}
......@@ -3535,7 +3535,7 @@ static void si_llvm_emit_es_epilogue(struct ac_shader_abi *abi,
ctx->esgs_ring,
out_val, 1, NULL, soffset,
(4 * param + chan) * 4,
1, 1, true, true);
1, 1, true);
}
}
......@@ -4247,7 +4247,7 @@ static void si_llvm_emit_vertex(struct ac_shader_abi *abi,
ctx->gsvs_ring[stream],
out_val, 1,
voffset, soffset, 0,
1, 1, true, true);
1, 1, true);
}
}
......
......@@ -635,7 +635,7 @@ static void store_emit_buffer(struct si_shader_context *ctx,
voff, ctx->i32_0, 0,
!!(cache_policy & ac_glc),
!!(cache_policy & ac_slc),
writeonly_memory, false);
false);
}
}
......@@ -728,13 +728,13 @@ static void store_emit(
ac_build_gather_values(&ctx->ac, chans, num_channels),
vindex, ctx->i32_0 /* voffset */,
num_channels,
!!(args.cache_policy & ac_glc), false,
writeonly_memory);
!!(args.cache_policy & ac_glc),
false);
} else {
args.opcode = ac_image_store;
args.data[0] = ac_build_gather_values(&ctx->ac, chans, 4);
args.dim = ac_image_dim_from_tgsi_target(ctx->screen, inst->Memory.Texture);
args.attributes = ac_get_store_intr_attribs(writeonly_memory);
args.attributes = AC_FUNC_ATTR_INACCESSIBLE_MEM_ONLY;
args.dmask = 0xf;
emit_data->output[emit_data->chan] =
......
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