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radv: Use structured intrinsics instead of indexing workaround for GFX9. 

These force the index to be used in the instruction so we don't need the
workaround.

Totals:
SGPRS: 1321642 -> 1321802 (0.01 %)
VGPRS: 943664 -> 943788 (0.01 %)
Spilled SGPRs: 28468 -> 28480 (0.04 %)
Spilled VGPRs: 88 -> 89 (1.14 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 80 -> 80 (0.00 %) dwords per thread
Code Size: 52415292 -> 52338932 (-0.15 %) bytes
LDS: 400 -> 400 (0.00 %) blocks
Max Waves: 233903 -> 233803 (-0.04 %)
Wait states: 0 -> 0 (0.00 %)

Totals from affected shaders:
SGPRS: 238344 -> 238504 (0.07 %)
VGPRS: 232732 -> 232856 (0.05 %)
Spilled SGPRs: 13125 -> 13137 (0.09 %)
Spilled VGPRs: 88 -> 89 (1.14 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 80 -> 80 (0.00 %) dwords per thread
Code Size: 15752712 -> 15676352 (-0.48 %) bytes
LDS: 139 -> 139 (0.00 %) blocks
Max Waves: 31680 -> 31580 (-0.32 %)
Wait states: 0 -> 0 (0.00 %)

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
This commit is contained in:
Bas Nieuwenhuizen 2018-11-12 22:42:36 +01:00
parent 0990168642
commit dd0172e865
3 changed files with 75 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/amd/common/ac_llvm_build.c
View File

@ -1161,6 +1161,47 @@ ac_build_buffer_load_common(struct ac_llvm_context *ctx,
ac_get_load_intr_attribs(can_speculate));
}
static LLVMValueRef
ac_build_llvm8_buffer_load_common(struct ac_llvm_context *ctx,
LLVMValueRef rsrc,
LLVMValueRef vindex,
LLVMValueRef voffset,
LLVMValueRef soffset,
unsigned num_channels,
bool glc,
bool slc,
bool can_speculate,
bool use_format,
bool structurized)
{
LLVMValueRef args[5];
int idx = 0;
args[idx++] = LLVMBuildBitCast(ctx->builder, rsrc, ctx->v4i32, "");
if (structurized)
args[idx++] = vindex ? vindex : ctx->i32_0;
args[idx++] = voffset ? voffset : ctx->i32_0;
args[idx++] = soffset ? soffset : ctx->i32_0;
args[idx++] = LLVMConstInt(ctx->i32, (glc ? 1 : 0) + (slc ? 2 : 0), 0);
unsigned func = CLAMP(num_channels, 1, 3) - 1;
LLVMTypeRef types[] = {ctx->f32, ctx->v2f32, ctx->v4f32};
const char *type_names[] = {"f32", "v2f32", "v4f32"};
const char *indexing_kind = structurized ? "struct" : "raw";
char name[256];
if (use_format) {
snprintf(name, sizeof(name), "llvm.amdgcn.%s.buffer.load.format.%s",
indexing_kind, type_names[func]);
} else {
snprintf(name, sizeof(name), "llvm.amdgcn.%s.buffer.load.%s",
indexing_kind, type_names[func]);
}
return ac_build_intrinsic(ctx, name, types[func], args,
idx,
ac_get_load_intr_attribs(can_speculate));
}
LLVMValueRef
ac_build_buffer_load(struct ac_llvm_context *ctx,
LLVMValueRef rsrc,
@ -1218,6 +1259,11 @@ LLVMValueRef ac_build_buffer_load_format(struct ac_llvm_context *ctx,
bool glc,
bool can_speculate)
{
if (HAVE_LLVM >= 0x800) {
return ac_build_llvm8_buffer_load_common(ctx, rsrc, vindex, voffset, ctx->i32_0,
num_channels, glc, false,
can_speculate, true, true);
}
return ac_build_buffer_load_common(ctx, rsrc, vindex, voffset,
num_channels, glc, false,
can_speculate, true);
@ -1231,6 +1277,12 @@ LLVMValueRef ac_build_buffer_load_format_gfx9_safe(struct ac_llvm_context *ctx,
bool glc,
bool can_speculate)
{
if (HAVE_LLVM >= 0x800) {
return ac_build_llvm8_buffer_load_common(ctx, rsrc, vindex, voffset, ctx->i32_0,
num_channels, glc, false,
can_speculate, true, true);
}
LLVMValueRef elem_count = LLVMBuildExtractElement(ctx->builder, rsrc, LLVMConstInt(ctx->i32, 2, 0), "");
LLVMValueRef stride = LLVMBuildExtractElement(ctx->builder, rsrc, ctx->i32_1, "");
stride = LLVMBuildLShr(ctx->builder, stride, LLVMConstInt(ctx->i32, 16, 0), "");

29
src/amd/common/ac_nir_to_llvm.c
View File

@ -2387,10 +2387,17 @@ static void visit_image_store(struct ac_nir_context *ctx,
params[2] = LLVMBuildExtractElement(ctx->ac.builder, get_src(ctx, instr->src[1]),
ctx->ac.i32_0, ""); /* vindex */
params[3] = ctx->ac.i32_0; /* voffset */
params[4] = glc; /* glc */
params[5] = ctx->ac.i1false; /* slc */
ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.buffer.store.format.v4f32", ctx->ac.voidt,
params, 6, 0);
if (HAVE_LLVM >= 0x800) {
params[4] = ctx->ac.i32_0; /* soffset */
params[5] = glc ? ctx->ac.i32_1 : ctx->ac.i32_0;
ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.struct.buffer.store.format.v4f32", ctx->ac.voidt,
params, 6, 0);
} else {
params[4] = glc; /* glc */
params[5] = ctx->ac.i1false; /* slc */
ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.buffer.store.format.v4f32", ctx->ac.voidt,
params, 6, 0);
}
} else {
struct ac_image_args args = {};
args.opcode = ac_image_store;
@ -2470,10 +2477,18 @@ static LLVMValueRef visit_image_atomic(struct ac_nir_context *ctx,
params[param_count++] = LLVMBuildExtractElement(ctx->ac.builder, get_src(ctx, instr->src[1]),
ctx->ac.i32_0, ""); /* vindex */
params[param_count++] = ctx->ac.i32_0; /* voffset */
params[param_count++] = ctx->ac.i1false; /* slc */
if (HAVE_LLVM >= 0x800) {
params[param_count++] = ctx->ac.i32_0; /* soffset */
params[param_count++] = ctx->ac.i32_0; /* slc */
length = snprintf(intrinsic_name, sizeof(intrinsic_name),
"llvm.amdgcn.buffer.atomic.%s", atomic_name);
length = snprintf(intrinsic_name, sizeof(intrinsic_name),
"llvm.amdgcn.struct.buffer.atomic.%s.i32", atomic_name);
} else {
params[param_count++] = ctx->ac.i1false; /* slc */
length = snprintf(intrinsic_name, sizeof(intrinsic_name),
"llvm.amdgcn.buffer.atomic.%s", atomic_name);
}
assert(length < sizeof(intrinsic_name));
return ac_build_intrinsic(&ctx->ac, intrinsic_name, ctx->ac.i32,

2
src/amd/vulkan/radv_nir_to_llvm.c
View File

@ -3500,7 +3500,7 @@ LLVMModuleRef ac_translate_nir_to_llvm(struct ac_llvm_compiler *ac_llvm,
ctx.abi.load_sampler_desc = radv_get_sampler_desc;
ctx.abi.load_resource = radv_load_resource;
ctx.abi.clamp_shadow_reference = false;
ctx.abi.gfx9_stride_size_workaround = ctx.ac.chip_class == GFX9;
ctx.abi.gfx9_stride_size_workaround = ctx.ac.chip_class == GFX9 && HAVE_LLVM < 0x800;
if (shader_count >= 2)
ac_init_exec_full_mask(&ctx.ac);