mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-30 15:00:06 +00:00
4ba9dcc8a0
This implements the conditional constant propagation pass proposed in Constant propagation with conditional branches, Wegman and Zadeck, ACM TOPLAS 13(2):181-210. The main logic resides in CCPPass::VisitInstruction. Instruction that may produce a constant value are evaluated with the constant folder. If they produce a new constant, the instruction is considered interesting. Otherwise, it's considered varying (for unfoldable instructions) or just not interesting (when not enough operands have a constant value). The other main piece of logic is in CCPPass::VisitBranch. This evaluates the selector of the branch. When it's found to be a known value, it computes the destination basic block and sets it. This tells the propagator which branches to follow. The patch required extensions to the constant manager as well. Instead of hashing the Constant pointers, this patch changes the constant pool to hash the contents of the Constant. This allows the lookups to be done using the actual values of the Constant, preventing duplicate definitions.
150 lines
3.8 KiB
CMake
150 lines
3.8 KiB
CMake
# Copyright (c) 2016 Google Inc.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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add_library(SPIRV-Tools-opt
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aggressive_dead_code_elim_pass.h
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basic_block.h
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block_merge_pass.h
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build_module.h
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ccp_pass.h
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cfg_cleanup_pass.h
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cfg.h
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common_uniform_elim_pass.h
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compact_ids_pass.h
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constants.h
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dead_branch_elim_pass.h
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dead_variable_elimination.h
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decoration_manager.h
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def_use_manager.h
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dominator_analysis.h
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dominator_tree.h
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eliminate_dead_constant_pass.h
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eliminate_dead_functions_pass.h
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feature_manager.h
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flatten_decoration_pass.h
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fold.h
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fold_spec_constant_op_and_composite_pass.h
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freeze_spec_constant_value_pass.h
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function.h
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inline_exhaustive_pass.h
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inline_opaque_pass.h
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inline_pass.h
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insert_extract_elim.h
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instruction.h
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ir_context.h
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ir_loader.h
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local_access_chain_convert_pass.h
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local_redundancy_elimination.h
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local_single_block_elim_pass.h
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local_single_store_elim_pass.h
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local_ssa_elim_pass.h
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log.h
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mem_pass.h
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merge_return_pass.h
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module.h
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null_pass.h
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passes.h
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pass.h
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pass_manager.h
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private_to_local_pass.h
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propagator.h
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redundancy_elimination.h
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reflect.h
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remove_duplicates_pass.h
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scalar_replacement_pass.h
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set_spec_constant_default_value_pass.h
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strength_reduction_pass.h
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strip_debug_info_pass.h
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tree_iterator.h
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type_manager.h
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types.h
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unify_const_pass.h
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value_number_table.h
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aggressive_dead_code_elim_pass.cpp
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basic_block.cpp
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block_merge_pass.cpp
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build_module.cpp
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ccp_pass.cpp
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cfg_cleanup_pass.cpp
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cfg.cpp
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common_uniform_elim_pass.cpp
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compact_ids_pass.cpp
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constants.cpp
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dead_branch_elim_pass.cpp
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dead_variable_elimination.cpp
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decoration_manager.cpp
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def_use_manager.cpp
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dominator_tree.cpp
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eliminate_dead_constant_pass.cpp
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eliminate_dead_functions_pass.cpp
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feature_manager.cpp
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flatten_decoration_pass.cpp
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fold.cpp
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fold_spec_constant_op_and_composite_pass.cpp
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freeze_spec_constant_value_pass.cpp
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function.cpp
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inline_exhaustive_pass.cpp
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inline_opaque_pass.cpp
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inline_pass.cpp
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insert_extract_elim.cpp
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instruction.cpp
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instruction_list.cpp
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ir_context.cpp
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ir_loader.cpp
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local_access_chain_convert_pass.cpp
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local_redundancy_elimination.cpp
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local_single_block_elim_pass.cpp
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local_single_store_elim_pass.cpp
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local_ssa_elim_pass.cpp
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mem_pass.cpp
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merge_return_pass.cpp
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module.cpp
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optimizer.cpp
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pass.cpp
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pass_manager.cpp
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private_to_local_pass.cpp
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propagator.cpp
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redundancy_elimination.cpp
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remove_duplicates_pass.cpp
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scalar_replacement_pass.cpp
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set_spec_constant_default_value_pass.cpp
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strength_reduction_pass.cpp
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strip_debug_info_pass.cpp
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type_manager.cpp
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types.cpp
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unify_const_pass.cpp
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value_number_table.cpp
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)
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spvtools_default_compile_options(SPIRV-Tools-opt)
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target_include_directories(SPIRV-Tools-opt
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PUBLIC ${spirv-tools_SOURCE_DIR}/include
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PUBLIC ${SPIRV_HEADER_INCLUDE_DIR}
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PRIVATE ${spirv-tools_BINARY_DIR}
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)
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# We need the assembling and disassembling functionalities in the main library.
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target_link_libraries(SPIRV-Tools-opt
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PUBLIC ${SPIRV_TOOLS})
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set_property(TARGET SPIRV-Tools-opt PROPERTY FOLDER "SPIRV-Tools libraries")
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spvtools_check_symbol_exports(SPIRV-Tools-opt)
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if(ENABLE_SPIRV_TOOLS_INSTALL)
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install(TARGETS SPIRV-Tools-opt
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RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
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LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
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ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
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endif(ENABLE_SPIRV_TOOLS_INSTALL)
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