diff options
| author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2021-01-09 03:30:07 -0300 |
|---|---|---|
| committer | ameerj <52414509+ameerj@users.noreply.github.com> | 2021-07-22 21:51:21 -0400 |
| commit | 2d48a7b4d0666ad16d03a22d85712617a0849046 (patch) | |
| tree | dd1069afca86f66e77e3438da77421a43adf5091 /src/shader_recompiler/ir_opt/identity_removal_pass.cpp | |
| parent | 75059c46d645e42e8da31fb97d003047c67b004b (diff) | |
shader: Initial recompiler work
Diffstat (limited to 'src/shader_recompiler/ir_opt/identity_removal_pass.cpp')
| -rw-r--r-- | src/shader_recompiler/ir_opt/identity_removal_pass.cpp | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/shader_recompiler/ir_opt/identity_removal_pass.cpp b/src/shader_recompiler/ir_opt/identity_removal_pass.cpp new file mode 100644 index 0000000000..f9bb063fb1 --- /dev/null +++ b/src/shader_recompiler/ir_opt/identity_removal_pass.cpp @@ -0,0 +1,37 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <vector> + +#include "shader_recompiler/frontend/ir/basic_block.h" +#include "shader_recompiler/frontend/ir/microinstruction.h" +#include "shader_recompiler/ir_opt/passes.h" + +namespace Shader::Optimization { + +void IdentityRemovalPass(IR::Block& block) { + std::vector<IR::Inst*> to_invalidate; + + for (auto inst = block.begin(); inst != block.end();) { + const size_t num_args{inst->NumArgs()}; + for (size_t i = 0; i < num_args; ++i) { + IR::Value arg; + while ((arg = inst->Arg(i)).IsIdentity()) { + inst->SetArg(i, arg.Inst()->Arg(0)); + } + } + if (inst->Opcode() == IR::Opcode::Identity || inst->Opcode() == IR::Opcode::Void) { + to_invalidate.push_back(&*inst); + inst = block.Instructions().erase(inst); + } else { + ++inst; + } + } + + for (IR::Inst* const inst : to_invalidate) { + inst->Invalidate(); + } +} + +} // namespace Shader::Optimization |