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https://github.com/KhronosGroup/SPIRV-Tools
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9beb54513c
* Reimplement LCS used by spirv-diff
Two improvements are made to the LCS algorithm:
- The LCS algorithm is reimplemented to use a std::stack instead of
being recursive. This prevents stack overflow in the LCSTest.Large
test.
- The LCS algorithm uses an NxM table. Previously, entries of this
table were {size_t, bool, bool}, which is now packed in 32 bits. The
first entry can assume a maximum value of min(N, M), which
realistically for SPIR-V diff will not be larger than 1 billion
instructions. This reduces memory usage of LCS by 75%.
This partially reverts
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| .. | ||
| .gitignore | ||
| basic_autogen.cpp | ||
| basic_dst.spvasm | ||
| basic_src.spvasm | ||
| diff_test_files_autogen.cmake | ||
| different_decorations_fragment_autogen.cpp | ||
| different_decorations_fragment_dst.spvasm | ||
| different_decorations_fragment_src.spvasm | ||
| different_decorations_vertex_autogen.cpp | ||
| different_decorations_vertex_dst.spvasm | ||
| different_decorations_vertex_src.spvasm | ||
| extra_if_block_autogen.cpp | ||
| extra_if_block_dst.spvasm | ||
| extra_if_block_src.spvasm | ||
| generate_tests.py | ||
| index_signedness_autogen.cpp | ||
| index_signedness_dst.spvasm | ||
| index_signedness_src.spvasm | ||
| int_vs_uint_constants_autogen.cpp | ||
| int_vs_uint_constants_dst.spvasm | ||
| int_vs_uint_constants_src.spvasm | ||
| large_functions_large_diffs_autogen.cpp | ||
| large_functions_large_diffs_dst.spvasm | ||
| large_functions_large_diffs_src.spvasm | ||
| large_functions_small_diffs_autogen.cpp | ||
| large_functions_small_diffs_dst.spvasm | ||
| large_functions_small_diffs_src.spvasm | ||
| multiple_different_entry_points_autogen.cpp | ||
| multiple_different_entry_points_dst.spvasm | ||
| multiple_different_entry_points_src.spvasm | ||
| multiple_same_entry_points_autogen.cpp | ||
| multiple_same_entry_points_dst.spvasm | ||
| multiple_same_entry_points_src.spvasm | ||
| OpExtInst_in_dst_only_autogen.cpp | ||
| OpExtInst_in_dst_only_dst.spvasm | ||
| OpExtInst_in_dst_only_src.spvasm | ||
| OpExtInst_in_src_only_autogen.cpp | ||
| OpExtInst_in_src_only_dst.spvasm | ||
| OpExtInst_in_src_only_src.spvasm | ||
| README.md | ||
| reordered_if_blocks_autogen.cpp | ||
| reordered_if_blocks_dst.spvasm | ||
| reordered_if_blocks_src.spvasm | ||
| reordered_switch_blocks_autogen.cpp | ||
| reordered_switch_blocks_dst.spvasm | ||
| reordered_switch_blocks_src.spvasm | ||
| small_functions_small_diffs_autogen.cpp | ||
| small_functions_small_diffs_dst.spvasm | ||
| small_functions_small_diffs_src.spvasm | ||
| unrelated_shaders_autogen.cpp | ||
| unrelated_shaders_dst.spvasm | ||
| unrelated_shaders_src.spvasm | ||
Diff tests
This directory contains files used to ensure correctness of the spirv-diff implementation. The
generate_tests.py script takes name_src.spvasm and name_dst.spvasm (for each name) and
produces unit test files in the form of name_autogen.cpp.
The unit test files test the diff between the src and dst inputs, as well as between debug-stripped
versions of those. Additionally, based on the {variant}_TESTS lists defined in
generate_tests.py, extra unit tests are added to exercise different options of spirv-diff.
New tests are added simply by placing a new name_src.spvasm and name_dst.spvasm pair in this
directory and running generate_tests.py. Note that this script needs the path to the spirv-diff
executable that is built.
The generate_tests.py script additionally expects name_src.spvasm to include a heading where the
purpose of the test is explained. This heading is parsed as a block of lines starting with ;; at
the top of the file.