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-rw-r--r--src/shader_recompiler/ir_opt/global_memory_to_storage_buffer_pass.cpp31
1 files changed, 26 insertions, 5 deletions
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 03bd547b7..98e3dfef7 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
@@ -43,6 +43,8 @@ using StorageBufferSet =
boost::container::flat_set<StorageBufferAddr, std::less<StorageBufferAddr>,
boost::container::small_vector<StorageBufferAddr, 16>>;
using StorageInstVector = boost::container::small_vector<StorageInst, 24>;
+using VisitedBlocks = boost::container::flat_set<IR::Block*, std::less<IR::Block*>,
+ boost::container::small_vector<IR::Block*, 4>>;
/// Returns true when the instruction is a global memory instruction
bool IsGlobalMemory(const IR::Inst& inst) {
@@ -194,7 +196,8 @@ std::optional<LowAddrInfo> TrackLowAddress(IR::Inst* inst) {
}
/// Recursively tries to track the storage buffer address used by a global memory instruction
-std::optional<StorageBufferAddr> Track(const IR::Value& value, const Bias* bias) {
+std::optional<StorageBufferAddr> Track(IR::Block* block, const IR::Value& value, const Bias* bias,
+ VisitedBlocks& visited) {
if (value.IsImmediate()) {
// Immediates can't be a storage buffer
return std::nullopt;
@@ -223,8 +226,24 @@ std::optional<StorageBufferAddr> Track(const IR::Value& value, const Bias* bias)
}
// Reversed loops are more likely to find the right result
for (size_t arg = inst->NumArgs(); arg--;) {
- if (const std::optional storage_buffer{Track(inst->Arg(arg), bias)}) {
- return *storage_buffer;
+ 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;
+ }
+ const std::optional storage_buffer{Track(phi_block, inst->Arg(arg), bias, visited)};
+ if (storage_buffer) {
+ return *storage_buffer;
+ }
+ } else {
+ const std::optional storage_buffer{Track(block, inst->Arg(arg), bias, visited)};
+ if (storage_buffer) {
+ return *storage_buffer;
+ }
}
}
return std::nullopt;
@@ -248,10 +267,12 @@ void CollectStorageBuffers(IR::Block& block, IR::Inst& inst, StorageBufferSet& s
}
// First try to find storage buffers in the NVN address
const IR::U32 low_addr{low_addr_info->value};
- std::optional<StorageBufferAddr> storage_buffer{Track(low_addr, &nvn_bias)};
+ VisitedBlocks visited_blocks;
+ std::optional storage_buffer{Track(&block, low_addr, &nvn_bias, visited_blocks)};
if (!storage_buffer) {
// If it fails, track without a bias
- storage_buffer = Track(low_addr, nullptr);
+ visited_blocks.clear();
+ storage_buffer = Track(&block, low_addr, nullptr, visited_blocks);
if (!storage_buffer) {
// If that also failed, drop the global memory usage
DiscardGlobalMemory(block, inst);