shader_ir: Pass decoded nodes as a whole instead of per basic blocks

Some games call LDG at the top of a basic block, making the tracking
heuristic to fail. This commit lets the heuristic the decoded nodes as a
whole instead of per basic blocks.

This may lead to some false positives but allows it the heuristic to
track cases it previously couldn't.

src/video_core/shader/decode.cpp

@@ -151,7 +151,7 @@ u32 ShaderIR::DecodeInstr(BasicBlock& bb, u32 pc) {
     UNIMPLEMENTED_IF_MSG(instr.pred.full_pred == Pred::NeverExecute,
                          "NeverExecute predicate not implemented");
 
-    static const std::map<OpCode::Type, u32 (ShaderIR::*)(BasicBlock&, const BasicBlock&, u32)>
+    static const std::map<OpCode::Type, u32 (ShaderIR::*)(BasicBlock&, u32)>
         decoders = {
             {OpCode::Type::Arithmetic, &ShaderIR::DecodeArithmetic},
             {OpCode::Type::ArithmeticImmediate, &ShaderIR::DecodeArithmeticImmediate},
@@ -181,9 +181,9 @@ u32 ShaderIR::DecodeInstr(BasicBlock& bb, u32 pc) {
 
     std::vector<Node> tmp_block;
     if (const auto decoder = decoders.find(opcode->get().GetType()); decoder != decoders.end()) {
-        pc = (this->*decoder->second)(tmp_block, bb, pc);
+        pc = (this->*decoder->second)(tmp_block, pc);
     } else {
-        pc = DecodeOther(tmp_block, bb, pc);
+        pc = DecodeOther(tmp_block, pc);
     }
 
     // Some instructions (like SSY) don't have a predicate field, they are always unconditionally
@@ -192,11 +192,14 @@ u32 ShaderIR::DecodeInstr(BasicBlock& bb, u32 pc) {
     const auto pred_index = static_cast<u32>(instr.pred.pred_index);
 
     if (can_be_predicated && pred_index != static_cast<u32>(Pred::UnusedIndex)) {
-        bb.push_back(
+        const Node conditional =
-            Conditional(GetPredicate(pred_index, instr.negate_pred != 0), std::move(tmp_block)));
+            Conditional(GetPredicate(pred_index, instr.negate_pred != 0), std::move(tmp_block));
+        global_code.push_back(conditional);
+        bb.push_back(conditional);
     } else {
         for (auto& node : tmp_block) {
-            bb.push_back(std::move(node));
+            global_code.push_back(node);
+            bb.push_back(node);
         }
     }
 

src/video_core/shader/decode/arithmetic.cpp

@@ -13,7 +13,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::SubOp;
 
-u32 ShaderIR::DecodeArithmetic(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeArithmetic(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/arithmetic_half.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeArithmeticHalf(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeArithmeticHalf(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/arithmetic_half_immediate.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeArithmeticHalfImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeArithmeticHalfImmediate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/arithmetic_immediate.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeArithmeticImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeArithmeticImmediate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/arithmetic_integer.cpp

@@ -15,7 +15,7 @@ using Tegra::Shader::OpCode;
 using Tegra::Shader::Pred;
 using Tegra::Shader::Register;
 
-u32 ShaderIR::DecodeArithmeticInteger(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeArithmeticInteger(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/arithmetic_integer_immediate.cpp

@@ -16,7 +16,7 @@ using Tegra::Shader::Pred;
 using Tegra::Shader::PredicateResultMode;
 using Tegra::Shader::Register;
 
-u32 ShaderIR::DecodeArithmeticIntegerImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeArithmeticIntegerImmediate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/bfe.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeBfe(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeBfe(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/bfi.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeBfi(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeBfi(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/conversion.cpp

@@ -13,7 +13,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Register;
 
-u32 ShaderIR::DecodeConversion(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeConversion(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/ffma.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeFfma(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeFfma(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/float_set.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeFloatSet(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeFloatSet(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/float_set_predicate.cpp

@@ -13,7 +13,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Pred;
 
-u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeFloatSetPredicate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/half_set.cpp

@@ -14,7 +14,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeHalfSet(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeHalfSet(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/half_set_predicate.cpp

@@ -13,7 +13,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Pred;
 
-u32 ShaderIR::DecodeHalfSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeHalfSetPredicate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/hfma2.cpp

@@ -16,7 +16,7 @@ using Tegra::Shader::HalfType;
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeHfma2(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeHfma2(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/integer_set.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeIntegerSet(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeIntegerSet(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/integer_set_predicate.cpp

@@ -13,7 +13,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Pred;
 
-u32 ShaderIR::DecodeIntegerSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeIntegerSetPredicate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/memory.cpp

@@ -36,7 +36,7 @@ static std::size_t GetCoordCount(TextureType texture_type) {
     }
 }
 
-u32 ShaderIR::DecodeMemory(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeMemory(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 
@@ -137,7 +137,8 @@ u32 ShaderIR::DecodeMemory(BasicBlock& bb, const BasicBlock& code, u32 pc) {
         }();
 
         const Node addr_register = GetRegister(instr.gpr8);
-        const Node base_address = TrackCbuf(addr_register, code, static_cast<s64>(code.size()));
+        const Node base_address =
+            TrackCbuf(addr_register, global_code, static_cast<s64>(global_code.size()));
         const auto cbuf = std::get_if<CbufNode>(base_address);
         ASSERT(cbuf != nullptr);
         const auto cbuf_offset_imm = std::get_if<ImmediateNode>(cbuf->GetOffset());

src/video_core/shader/decode/other.cpp

@@ -14,7 +14,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Register;
 
-u32 ShaderIR::DecodeOther(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeOther(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/predicate_set_predicate.cpp

@@ -13,7 +13,7 @@ using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Pred;
 
-u32 ShaderIR::DecodePredicateSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodePredicateSetPredicate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/predicate_set_register.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodePredicateSetRegister(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodePredicateSetRegister(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/register_set_predicate.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeRegisterSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeRegisterSetPredicate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/shift.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeShift(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeShift(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/video.cpp

@@ -15,7 +15,7 @@ using Tegra::Shader::Pred;
 using Tegra::Shader::VideoType;
 using Tegra::Shader::VmadShr;
 
-u32 ShaderIR::DecodeVideo(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeVideo(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/decode/xmad.cpp

@@ -12,7 +12,7 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
-u32 ShaderIR::DecodeXmad(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+u32 ShaderIR::DecodeXmad(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 

src/video_core/shader/shader_ir.h

@@ -591,31 +591,31 @@ private:
      */
     u32 DecodeInstr(BasicBlock& bb, u32 pc);
 
-    u32 DecodeArithmetic(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeArithmetic(BasicBlock& bb, u32 pc);
-    u32 DecodeArithmeticImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeArithmeticImmediate(BasicBlock& bb, u32 pc);
-    u32 DecodeBfe(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeBfe(BasicBlock& bb, u32 pc);
-    u32 DecodeBfi(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeBfi(BasicBlock& bb, u32 pc);
-    u32 DecodeShift(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeShift(BasicBlock& bb, u32 pc);
-    u32 DecodeArithmeticInteger(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeArithmeticInteger(BasicBlock& bb, u32 pc);
-    u32 DecodeArithmeticIntegerImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeArithmeticIntegerImmediate(BasicBlock& bb, u32 pc);
-    u32 DecodeArithmeticHalf(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeArithmeticHalf(BasicBlock& bb, u32 pc);
-    u32 DecodeArithmeticHalfImmediate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeArithmeticHalfImmediate(BasicBlock& bb, u32 pc);
-    u32 DecodeFfma(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeFfma(BasicBlock& bb, u32 pc);
-    u32 DecodeHfma2(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeHfma2(BasicBlock& bb, u32 pc);
-    u32 DecodeConversion(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeConversion(BasicBlock& bb, u32 pc);
-    u32 DecodeMemory(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeMemory(BasicBlock& bb, u32 pc);
-    u32 DecodeFloatSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeFloatSetPredicate(BasicBlock& bb, u32 pc);
-    u32 DecodeIntegerSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeIntegerSetPredicate(BasicBlock& bb, u32 pc);
-    u32 DecodeHalfSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeHalfSetPredicate(BasicBlock& bb, u32 pc);
-    u32 DecodePredicateSetRegister(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodePredicateSetRegister(BasicBlock& bb, u32 pc);
-    u32 DecodePredicateSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodePredicateSetPredicate(BasicBlock& bb, u32 pc);
-    u32 DecodeRegisterSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeRegisterSetPredicate(BasicBlock& bb, u32 pc);
-    u32 DecodeFloatSet(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeFloatSet(BasicBlock& bb, u32 pc);
-    u32 DecodeIntegerSet(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeIntegerSet(BasicBlock& bb, u32 pc);
-    u32 DecodeHalfSet(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeHalfSet(BasicBlock& bb, u32 pc);
-    u32 DecodeVideo(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeVideo(BasicBlock& bb, u32 pc);
-    u32 DecodeXmad(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeXmad(BasicBlock& bb, u32 pc);
-    u32 DecodeOther(BasicBlock& bb, const BasicBlock& code, u32 pc);
+    u32 DecodeOther(BasicBlock& bb, u32 pc);
 
     /// Internalizes node's data and returns a managed pointer to a clone of that node
     Node StoreNode(NodeData&& node_data);
@@ -804,6 +804,7 @@ private:
     std::map<std::pair<u32, u32>, ExitMethod> exit_method_map;
 
     std::map<u32, BasicBlock> basic_blocks;
+    BasicBlock global_code;
 
     std::vector<std::unique_ptr<NodeData>> stored_nodes;