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2e461aa2e4
ShaderCacheVersion.cmake wrote the source version and the APS5_* switch
list into a generated ShaderCacheVersion.hpp that ShaderDiskCache.cpp
included. The version hashes every recompiler source, so any content
change under core/shader/recompiler rewrote that header and recompiled
ShaderDiskCache.cpp next to the file actually edited.
The script now writes ShaderCacheVersion.cpp, which defines
Generated::SourceVersion and Generated::RecompilerSwitches (a span over
the same sorted switch list) with constinit. They are declared in the
new ShaderCacheSourceVersion.hpp in the source tree, which
ShaderDiskCache.cpp includes; the generated directory is no longer an
include directory. The header has a different name from the old
generated one so that a build directory that still holds the stale
ShaderCacheVersion.hpp next to the generated .cpp cannot pick it up.
What is hashed is unchanged: the same manifest (recompiler sources,
HostThreadLocal.hpp, submodule commits, compiler, build type,
architecture and flags), the same checks and the same rewrite-only-
when-different step, so the version still changes exactly when it did.
Running the upstream/main script and this one with the same arguments
over this tree gives the same version (0x7907101dc4d8c62e) and the same
26 switches, and a second ninja run has no work to do. The value
differs from the one main 682ef0c17 generates (0xdce3a0ce03bf030a) only
because this commit edits hashed files, as any recompiler change does.
Tested with ninja -d explain -j 4 shader_recompiler_agc_driver,
CCACHE_DISABLE=1, after appending a line to
IntermediateRepresentation/src/IrType.cpp, three runs on main and then
three runs on this commit back to back, with the machine at 100% CPU
from other builds. On main ShaderCacheVersion.hpp and
ShaderDiskCache.cpp.obj are dirty and the rebuild takes 22.0/23.9/22.2 s.
With this change only ShaderCacheVersion.cpp.obj and IrType.cpp.obj are
compiled, ShaderDiskCache.cpp is absent from the explain output, and the
rebuild takes 12.2/14.7/15.0 s. The shader and recompiler ctest set
(26 tests) passes.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Codex <noreply@openai.com>
16 lines
358 B
C++
16 lines
358 B
C++
#ifndef CORE_SHADER_RECOMPILER_SHADERCACHESOURCEVERSION_HPP
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#define CORE_SHADER_RECOMPILER_SHADERCACHESOURCEVERSION_HPP
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#include <cstdint>
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#include <span>
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#include <string_view>
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namespace ShaderRecompiler::ShaderDiskCache::Generated {
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extern const std::uint64_t SourceVersion;
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extern const std::span<const std::string_view> RecompilerSwitches;
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}
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#endif
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