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author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2021-01-09 07:30:07 +0100 |
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committer | ameerj <52414509+ameerj@users.noreply.github.com> | 2021-07-23 03:51:21 +0200 |
commit | 2d48a7b4d0666ad16d03a22d85712617a0849046 (patch) | |
tree | dd1069afca86f66e77e3438da77421a43adf5091 /src/shader_recompiler/ir_opt/dead_code_elimination_pass.cpp | |
parent | thread_worker: Fix compile time error (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/shader_recompiler/ir_opt/dead_code_elimination_pass.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/shader_recompiler/ir_opt/dead_code_elimination_pass.cpp b/src/shader_recompiler/ir_opt/dead_code_elimination_pass.cpp new file mode 100644 index 000000000..bbaa412f6 --- /dev/null +++ b/src/shader_recompiler/ir_opt/dead_code_elimination_pass.cpp @@ -0,0 +1,23 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <ranges> + +#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 DeadCodeEliminationPass(IR::Block& block) { + // We iterate over the instructions in reverse order. + // This is because removing an instruction reduces the number of uses for earlier instructions. + for (IR::Inst& inst : std::views::reverse(block)) { + if (!inst.HasUses() && !inst.MayHaveSideEffects()) { + inst.Invalidate(); + } + } +} + +} // namespace Shader::Optimization |