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shader_recompiler: Improve divergence handling and readlane elimintation (#2667)

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* control_flow_graph: Improve divergence handling

* recompiler: Simplify optimization passes

Removes a redudant constant propagation and cleans up the passes a little

* ir_passes: Add new readlane elimination pass

The algorithm has grown complex enough where it deserves its own pass. The old implementation could only handle a single phi level properly,
however this one should be able to eliminate vast majority of lane cases remaining. It first performs a traversal of the phi tree to ensure
that all phi sources can be rewritten into an expected value and then performs elimintation by recursively duplicating the phi nodes at each step,
in order to preserve control flow.

* clang format

* control_flow_graph: Remove debug code
This commit is contained in:
TheTurtle 2025-03-23 00:35:42 +02:00 • committed by GitHub
parent a80c4a7f48
commit 1f9ac53c28
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GPG key ID: B5690EEEBB952194
9 changed files with 211 additions and 139 deletions
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CMakeLists.txt
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@ -771,6 +771,7 @@ set(SHADER_RECOMPILER src/shader_recompiler/exception.h
src/shader_recompiler/ir/passes/identity_removal_pass.cpp
src/shader_recompiler/ir/passes/ir_passes.h
src/shader_recompiler/ir/passes/lower_buffer_format_to_raw.cpp
src/shader_recompiler/ir/passes/readlane_elimination_pass.cpp
src/shader_recompiler/ir/passes/resource_tracking_pass.cpp
src/shader_recompiler/ir/passes/ring_access_elimination.cpp
src/shader_recompiler/ir/passes/shader_info_collection_pass.cpp
@ -1121,7 +1122,6 @@ cmrc_add_resource_library(embedded-resources
src/images/gold.png
src/images/platinum.png
src/images/silver.png)
target_link_libraries(shadps4 PRIVATE res::embedded)
# ImGui resources