diff options
| author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2021-02-05 05:58:02 -0300 |
|---|---|---|
| committer | ameerj <52414509+ameerj@users.noreply.github.com> | 2021-07-22 21:51:21 -0400 |
| commit | e81739493a0cacc1efe3295f9d287d5d31b1a989 (patch) | |
| tree | 11a3d04ce9def535414a00226030798f337c053c /src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp | |
| parent | d24a16045f0f6b0b873d5e3b5bf187c1a8c4343f (diff) | |
shader: Constant propagation and global memory to storage buffer
Diffstat (limited to 'src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp')
| -rw-r--r-- | src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp | 56 |
1 files changed, 54 insertions, 2 deletions
diff --git a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp index a4b256a40e..3c9b020e08 100644 --- a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp +++ b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp @@ -14,8 +14,6 @@ // https://link.springer.com/chapter/10.1007/978-3-642-37051-9_6 // -#include <map> - #include <boost/container/flat_map.hpp> #include "shader_recompiler/frontend/ir/basic_block.h" @@ -30,6 +28,12 @@ namespace Shader::Optimization { namespace { using ValueMap = boost::container::flat_map<IR::Block*, IR::Value, std::less<IR::Block*>>; +struct FlagTag {}; +struct ZeroFlagTag : FlagTag {}; +struct SignFlagTag : FlagTag {}; +struct CarryFlagTag : FlagTag {}; +struct OverflowFlagTag : FlagTag {}; + struct DefTable { [[nodiscard]] ValueMap& operator[](IR::Reg variable) noexcept { return regs[IR::RegIndex(variable)]; @@ -39,8 +43,28 @@ struct DefTable { return preds[IR::PredIndex(variable)]; } + [[nodiscard]] ValueMap& operator[](ZeroFlagTag) noexcept { + return zero_flag; + } + + [[nodiscard]] ValueMap& operator[](SignFlagTag) noexcept { + return sign_flag; + } + + [[nodiscard]] ValueMap& operator[](CarryFlagTag) noexcept { + return carry_flag; + } + + [[nodiscard]] ValueMap& operator[](OverflowFlagTag) noexcept { + return overflow_flag; + } + std::array<ValueMap, IR::NUM_USER_REGS> regs; std::array<ValueMap, IR::NUM_USER_PREDS> preds; + ValueMap zero_flag; + ValueMap sign_flag; + ValueMap carry_flag; + ValueMap overflow_flag; }; IR::Opcode UndefOpcode(IR::Reg) noexcept { @@ -51,6 +75,10 @@ IR::Opcode UndefOpcode(IR::Pred) noexcept { return IR::Opcode::Undef1; } +IR::Opcode UndefOpcode(const FlagTag&) noexcept { + return IR::Opcode::Undef1; +} + [[nodiscard]] bool IsPhi(const IR::Inst& inst) noexcept { return inst.Opcode() == IR::Opcode::Phi; } @@ -135,6 +163,18 @@ void SsaRewritePass(IR::Function& function) { pass.WriteVariable(pred, block.get(), inst.Arg(1)); } break; + case IR::Opcode::SetZFlag: + pass.WriteVariable(ZeroFlagTag{}, block.get(), inst.Arg(0)); + break; + case IR::Opcode::SetSFlag: + pass.WriteVariable(SignFlagTag{}, block.get(), inst.Arg(0)); + break; + case IR::Opcode::SetCFlag: + pass.WriteVariable(CarryFlagTag{}, block.get(), inst.Arg(0)); + break; + case IR::Opcode::SetOFlag: + pass.WriteVariable(OverflowFlagTag{}, block.get(), inst.Arg(0)); + break; case IR::Opcode::GetRegister: if (const IR::Reg reg{inst.Arg(0).Reg()}; reg != IR::Reg::RZ) { inst.ReplaceUsesWith(pass.ReadVariable(reg, block.get())); @@ -145,6 +185,18 @@ void SsaRewritePass(IR::Function& function) { inst.ReplaceUsesWith(pass.ReadVariable(pred, block.get())); } break; + case IR::Opcode::GetZFlag: + inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block.get())); + break; + case IR::Opcode::GetSFlag: + inst.ReplaceUsesWith(pass.ReadVariable(SignFlagTag{}, block.get())); + break; + case IR::Opcode::GetCFlag: + inst.ReplaceUsesWith(pass.ReadVariable(CarryFlagTag{}, block.get())); + break; + case IR::Opcode::GetOFlag: + inst.ReplaceUsesWith(pass.ReadVariable(OverflowFlagTag{}, block.get())); + break; default: break; } |