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-rw-r--r--src/shader_recompiler/CMakeLists.txt1
-rw-r--r--src/shader_recompiler/frontend/ir/breadth_first_search.h57
-rw-r--r--src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp84
-rw-r--r--src/shader_recompiler/ir_opt/texture_pass.cpp68
4 files changed, 106 insertions, 104 deletions
diff --git a/src/shader_recompiler/CMakeLists.txt b/src/shader_recompiler/CMakeLists.txt
index 181eac9f2..700b17113 100644
--- a/src/shader_recompiler/CMakeLists.txt
+++ b/src/shader_recompiler/CMakeLists.txt
@@ -27,6 +27,7 @@ add_library(shader_recompiler STATIC
frontend/ir/attribute.h
frontend/ir/basic_block.cpp
frontend/ir/basic_block.h
+ frontend/ir/breadth_first_search.h
frontend/ir/condition.cpp
frontend/ir/condition.h
frontend/ir/flow_test.cpp
diff --git a/src/shader_recompiler/frontend/ir/breadth_first_search.h b/src/shader_recompiler/frontend/ir/breadth_first_search.h
new file mode 100644
index 000000000..b35f062d4
--- /dev/null
+++ b/src/shader_recompiler/frontend/ir/breadth_first_search.h
@@ -0,0 +1,57 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <optional>
+#include <type_traits>
+#include <queue>
+
+#include <boost/container/small_vector.hpp>
+
+#include "shader_recompiler/frontend/ir/microinstruction.h"
+#include "shader_recompiler/frontend/ir/value.h"
+
+namespace Shader::IR {
+
+template <typename Pred>
+auto BreadthFirstSearch(const Value& value, Pred&& pred)
+ -> std::invoke_result_t<Pred, const Inst*> {
+ if (value.IsImmediate()) {
+ // Nothing to do with immediates
+ return std::nullopt;
+ }
+ // Breadth-first search visiting the right most arguments first
+ // Small vector has been determined from shaders in Super Smash Bros. Ultimate
+ boost::container::small_vector<const Inst*, 2> visited;
+ std::queue<const Inst*> queue;
+ queue.push(value.InstRecursive());
+
+ while (!queue.empty()) {
+ // Pop one instruction from the queue
+ const Inst* const inst{queue.front()};
+ queue.pop();
+ if (const std::optional result = pred(inst)) {
+ // This is the instruction we were looking for
+ return result;
+ }
+ // Visit the right most arguments first
+ for (size_t arg = inst->NumArgs(); arg--;) {
+ const Value arg_value{inst->Arg(arg)};
+ if (arg_value.IsImmediate()) {
+ continue;
+ }
+ // Queue instruction if it hasn't been visited
+ const Inst* const arg_inst{arg_value.InstRecursive()};
+ if (std::ranges::find(visited, arg_inst) == visited.end()) {
+ visited.push_back(arg_inst);
+ queue.push(arg_inst);
+ }
+ }
+ }
+ // SSA tree has been traversed and the result hasn't been found
+ return std::nullopt;
+}
+
+} // namespace Shader::IR
diff --git a/src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp b/src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp
index f94c82e21..0858a0bdd 100644
--- a/src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp
+++ b/src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp
@@ -12,6 +12,7 @@
#include <boost/container/small_vector.hpp>
#include "shader_recompiler/frontend/ir/basic_block.h"
+#include "shader_recompiler/frontend/ir/breadth_first_search.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/ir_opt/passes.h"
@@ -219,68 +220,35 @@ std::optional<LowAddrInfo> TrackLowAddress(IR::Inst* inst) {
};
}
-/// Tries to get the storage buffer out of a constant buffer read instruction
-std::optional<StorageBufferAddr> TryGetStorageBuffer(const IR::Inst* inst, const Bias* bias) {
- if (inst->Opcode() != IR::Opcode::GetCbufU32) {
- return std::nullopt;
- }
- const IR::Value index{inst->Arg(0)};
- const IR::Value offset{inst->Arg(1)};
- if (!index.IsImmediate()) {
- // Definitely not a storage buffer if it's read from a non-immediate index
- return std::nullopt;
- }
- if (!offset.IsImmediate()) {
- // TODO: Support SSBO arrays
- return std::nullopt;
- }
- const StorageBufferAddr storage_buffer{
- .index{index.U32()},
- .offset{offset.U32()},
- };
- if (bias && !MeetsBias(storage_buffer, *bias)) {
- // We have to blacklist some addresses in case we wrongly point to them
- return std::nullopt;
- }
- return storage_buffer;
-}
-
/// Tries to track the storage buffer address used by a global memory instruction
std::optional<StorageBufferAddr> Track(const IR::Value& value, const Bias* bias) {
- if (value.IsImmediate()) {
- // Nothing to do with immediates
- return std::nullopt;
- }
- // Breadth-first search visiting the right most arguments first
- // Small vector has been determined from shaders in Super Smash Bros. Ultimate
- small_vector<const IR::Inst*, 2> visited;
- std::queue<const IR::Inst*> queue;
- queue.push(value.InstRecursive());
-
- while (!queue.empty()) {
- // Pop one instruction from the queue
- const IR::Inst* const inst{queue.front()};
- queue.pop();
- if (const std::optional<StorageBufferAddr> result = TryGetStorageBuffer(inst, bias)) {
- // This is the instruction we were looking for
- return result;
+ const auto pred{[bias](const IR::Inst* inst) -> std::optional<StorageBufferAddr> {
+ if (inst->Opcode() != IR::Opcode::GetCbufU32) {
+ return std::nullopt;
}
- // Visit the right most arguments first
- for (size_t arg = inst->NumArgs(); arg--;) {
- const IR::Value arg_value{inst->Arg(arg)};
- if (arg_value.IsImmediate()) {
- continue;
- }
- // Queue instruction if it hasn't been visited
- const IR::Inst* const arg_inst{arg_value.InstRecursive()};
- if (std::ranges::find(visited, arg_inst) == visited.end()) {
- visited.push_back(arg_inst);
- queue.push(arg_inst);
- }
+ const IR::Value index{inst->Arg(0)};
+ const IR::Value offset{inst->Arg(1)};
+ if (!index.IsImmediate()) {
+ // Definitely not a storage buffer if it's read from a
+ // non-immediate index
+ return std::nullopt;
}
- }
- // SSA tree has been traversed and the origin hasn't been found
- return std::nullopt;
+ if (!offset.IsImmediate()) {
+ // TODO: Support SSBO arrays
+ return std::nullopt;
+ }
+ const StorageBufferAddr storage_buffer{
+ .index{index.U32()},
+ .offset{offset.U32()},
+ };
+ if (bias && !MeetsBias(storage_buffer, *bias)) {
+ // We have to blacklist some addresses in case we wrongly
+ // point to them
+ return std::nullopt;
+ }
+ return storage_buffer;
+ }};
+ return BreadthFirstSearch(value, pred);
}
/// Collects the storage buffer used by a global memory instruction and the instruction itself
diff --git a/src/shader_recompiler/ir_opt/texture_pass.cpp b/src/shader_recompiler/ir_opt/texture_pass.cpp
index da8977b76..bcb94ce4d 100644
--- a/src/shader_recompiler/ir_opt/texture_pass.cpp
+++ b/src/shader_recompiler/ir_opt/texture_pass.cpp
@@ -2,13 +2,14 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <algorithm>
#include <optional>
-#include <boost/container/flat_set.hpp>
#include <boost/container/small_vector.hpp>
#include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
+#include "shader_recompiler/frontend/ir/breadth_first_search.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/ir_opt/passes.h"
#include "shader_recompiler/shader_info.h"
@@ -28,9 +29,6 @@ struct TextureInst {
using TextureInstVector = boost::container::small_vector<TextureInst, 24>;
-using VisitedBlocks = boost::container::flat_set<IR::Block*, std::less<IR::Block*>,
- boost::container::small_vector<IR::Block*, 2>>;
-
IR::Opcode IndexedInstruction(const IR::Inst& inst) {
switch (inst.Opcode()) {
case IR::Opcode::BindlessImageSampleImplicitLod:
@@ -101,57 +99,35 @@ bool IsTextureInstruction(const IR::Inst& inst) {
return IndexedInstruction(inst) != IR::Opcode::Void;
}
-std::optional<ConstBufferAddr> Track(IR::Block* block, const IR::Value& value,
- VisitedBlocks& visited) {
- if (value.IsImmediate()) {
- // Immediates can't be a storage buffer
+std::optional<ConstBufferAddr> TryGetConstBuffer(const IR::Inst* inst) {
+ if (inst->Opcode() != IR::Opcode::GetCbufU32) {
return std::nullopt;
}
- const IR::Inst* const inst{value.InstRecursive()};
- if (inst->Opcode() == IR::Opcode::GetCbufU32) {
- const IR::Value index{inst->Arg(0)};
- const IR::Value offset{inst->Arg(1)};
- if (!index.IsImmediate()) {
- // Reading a bindless texture from variable indices is valid
- // but not supported here at the moment
- return std::nullopt;
- }
- if (!offset.IsImmediate()) {
- // TODO: Support arrays of textures
- return std::nullopt;
- }
- return ConstBufferAddr{
- .index{index.U32()},
- .offset{offset.U32()},
- };
+ const IR::Value index{inst->Arg(0)};
+ const IR::Value offset{inst->Arg(1)};
+ if (!index.IsImmediate()) {
+ // Reading a bindless texture from variable indices is valid
+ // but not supported here at the moment
+ return std::nullopt;
}
- // Reversed loops are more likely to find the right result
- for (size_t arg = inst->NumArgs(); arg--;) {
- IR::Block* inst_block{block};
- if (inst->Opcode() == IR::Opcode::Phi) {
- // If we are going through a phi node, mark the current block as visited
- visited.insert(block);
- // and skip already visited blocks to avoid looping forever
- IR::Block* const phi_block{inst->PhiBlock(arg)};
- if (visited.contains(phi_block)) {
- // Already visited, skip
- continue;
- }
- inst_block = phi_block;
- }
- const std::optional storage_buffer{Track(inst_block, inst->Arg(arg), visited)};
- if (storage_buffer) {
- return *storage_buffer;
- }
+ if (!offset.IsImmediate()) {
+ // TODO: Support arrays of textures
+ return std::nullopt;
}
- return std::nullopt;
+ return ConstBufferAddr{
+ .index{index.U32()},
+ .offset{offset.U32()},
+ };
+}
+
+std::optional<ConstBufferAddr> Track(const IR::Value& value) {
+ return IR::BreadthFirstSearch(value, TryGetConstBuffer);
}
TextureInst MakeInst(Environment& env, IR::Block* block, IR::Inst& inst) {
ConstBufferAddr addr;
if (IsBindless(inst)) {
- VisitedBlocks visited;
- const std::optional<ConstBufferAddr> track_addr{Track(block, inst.Arg(0), visited)};
+ const std::optional<ConstBufferAddr> track_addr{Track(inst.Arg(0))};
if (!track_addr) {
throw NotImplementedException("Failed to track bindless texture constant buffer");
}