diff options
Diffstat (limited to 'src/shader_recompiler/ir_opt')
| -rw-r--r-- | src/shader_recompiler/ir_opt/constant_propagation_pass.cpp | 50 | ||||
| -rw-r--r-- | src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp | 24 | ||||
| -rw-r--r-- | src/shader_recompiler/ir_opt/verification_pass.cpp | 4 |
3 files changed, 75 insertions, 3 deletions
diff --git a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp index f1170c61e..9fba6ac23 100644 --- a/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp +++ b/src/shader_recompiler/ir_opt/constant_propagation_pass.cpp @@ -132,6 +132,32 @@ void FoldLogicalAnd(IR::Inst& inst) { } } +void FoldLogicalOr(IR::Inst& inst) { + if (!FoldCommutative(inst, [](bool a, bool b) { return a || b; })) { + return; + } + const IR::Value rhs{inst.Arg(1)}; + if (rhs.IsImmediate()) { + if (rhs.U1()) { + inst.ReplaceUsesWith(IR::Value{true}); + } else { + inst.ReplaceUsesWith(inst.Arg(0)); + } + } +} + +void FoldLogicalNot(IR::Inst& inst) { + const IR::U1 value{inst.Arg(0)}; + if (value.IsImmediate()) { + inst.ReplaceUsesWith(IR::Value{!value.U1()}); + return; + } + IR::Inst* const arg{value.InstRecursive()}; + if (arg->Opcode() == IR::Opcode::LogicalNot) { + inst.ReplaceUsesWith(arg->Arg(0)); + } +} + template <typename Dest, typename Source> void FoldBitCast(IR::Inst& inst, IR::Opcode reverse) { const IR::Value value{inst.Arg(0)}; @@ -160,6 +186,24 @@ void FoldWhenAllImmediates(IR::Inst& inst, Func&& func) { inst.ReplaceUsesWith(EvalImmediates(inst, func, Indices{})); } +void FoldBranchConditional(IR::Inst& inst) { + const IR::U1 cond{inst.Arg(0)}; + if (cond.IsImmediate()) { + // TODO: Convert to Branch + return; + } + const IR::Inst* cond_inst{cond.InstRecursive()}; + if (cond_inst->Opcode() == IR::Opcode::LogicalNot) { + const IR::Value true_label{inst.Arg(1)}; + const IR::Value false_label{inst.Arg(2)}; + // Remove negation on the conditional (take the parameter out of LogicalNot) and swap + // the branches + inst.SetArg(0, cond_inst->Arg(0)); + inst.SetArg(1, false_label); + inst.SetArg(2, true_label); + } +} + void ConstantPropagation(IR::Inst& inst) { switch (inst.Opcode()) { case IR::Opcode::GetRegister: @@ -178,6 +222,10 @@ void ConstantPropagation(IR::Inst& inst) { return FoldSelect<u32>(inst); case IR::Opcode::LogicalAnd: return FoldLogicalAnd(inst); + case IR::Opcode::LogicalOr: + return FoldLogicalOr(inst); + case IR::Opcode::LogicalNot: + return FoldLogicalNot(inst); case IR::Opcode::ULessThan: return FoldWhenAllImmediates(inst, [](u32 a, u32 b) { return a < b; }); case IR::Opcode::BitFieldUExtract: @@ -188,6 +236,8 @@ void ConstantPropagation(IR::Inst& inst) { } return (base >> shift) & ((1U << count) - 1); }); + case IR::Opcode::BranchConditional: + return FoldBranchConditional(inst); default: break; } diff --git a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp index 15a9db90a..8ca996e93 100644 --- a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp +++ b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp @@ -34,6 +34,13 @@ struct SignFlagTag : FlagTag {}; struct CarryFlagTag : FlagTag {}; struct OverflowFlagTag : FlagTag {}; +struct GotoVariable : FlagTag { + GotoVariable() = default; + explicit GotoVariable(u32 index_) : index{index_} {} + + u32 index; +}; + struct DefTable { [[nodiscard]] ValueMap& operator[](IR::Reg variable) noexcept { return regs[IR::RegIndex(variable)]; @@ -43,6 +50,10 @@ struct DefTable { return preds[IR::PredIndex(variable)]; } + [[nodiscard]] ValueMap& operator[](GotoVariable goto_variable) { + return goto_vars[goto_variable.index]; + } + [[nodiscard]] ValueMap& operator[](ZeroFlagTag) noexcept { return zero_flag; } @@ -61,6 +72,7 @@ struct DefTable { std::array<ValueMap, IR::NUM_USER_REGS> regs; std::array<ValueMap, IR::NUM_USER_PREDS> preds; + boost::container::flat_map<u32, ValueMap> goto_vars; ValueMap zero_flag; ValueMap sign_flag; ValueMap carry_flag; @@ -68,15 +80,15 @@ struct DefTable { }; IR::Opcode UndefOpcode(IR::Reg) noexcept { - return IR::Opcode::Undef32; + return IR::Opcode::UndefU32; } IR::Opcode UndefOpcode(IR::Pred) noexcept { - return IR::Opcode::Undef1; + return IR::Opcode::UndefU1; } IR::Opcode UndefOpcode(const FlagTag&) noexcept { - return IR::Opcode::Undef1; + return IR::Opcode::UndefU1; } [[nodiscard]] bool IsPhi(const IR::Inst& inst) noexcept { @@ -165,6 +177,9 @@ void SsaRewritePass(IR::Function& function) { pass.WriteVariable(pred, block, inst.Arg(1)); } break; + case IR::Opcode::SetGotoVariable: + pass.WriteVariable(GotoVariable{inst.Arg(0).U32()}, block, inst.Arg(1)); + break; case IR::Opcode::SetZFlag: pass.WriteVariable(ZeroFlagTag{}, block, inst.Arg(0)); break; @@ -187,6 +202,9 @@ void SsaRewritePass(IR::Function& function) { inst.ReplaceUsesWith(pass.ReadVariable(pred, block)); } break; + case IR::Opcode::GetGotoVariable: + inst.ReplaceUsesWith(pass.ReadVariable(GotoVariable{inst.Arg(0).U32()}, block)); + break; case IR::Opcode::GetZFlag: inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block)); break; diff --git a/src/shader_recompiler/ir_opt/verification_pass.cpp b/src/shader_recompiler/ir_opt/verification_pass.cpp index 8a5adf5a2..32b56eb57 100644 --- a/src/shader_recompiler/ir_opt/verification_pass.cpp +++ b/src/shader_recompiler/ir_opt/verification_pass.cpp @@ -14,6 +14,10 @@ namespace Shader::Optimization { static void ValidateTypes(const IR::Function& function) { for (const auto& block : function.blocks) { for (const IR::Inst& inst : *block) { + if (inst.Opcode() == IR::Opcode::Phi) { + // Skip validation on phi nodes + continue; + } const size_t num_args{inst.NumArgs()}; for (size_t i = 0; i < num_args; ++i) { const IR::Type t1{inst.Arg(i).Type()}; |