[PATCH] D158469: [clang][deps] Compute command lines and file deps on-demand

[Jan Svoboda via Phabricator via cfe-commits]

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Although generating command lines and collecting file dependencies recently got faster, there are still benefits to be had from doing these lazily, on-demand.

This patch makes it so that the `ModuleDepsGraph` keeps the scanning instance alive. Instances of `ModuleDeps` can then use pointer to the `ModuleDepCollector` to compute the information lazily.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D158469

Files:
  clang/include/clang/Tooling/DependencyScanning/DependencyScanningTool.h
  clang/include/clang/Tooling/DependencyScanning/DependencyScanningWorker.h
  clang/include/clang/Tooling/DependencyScanning/ModuleDepCollector.h
  clang/lib/Tooling/DependencyScanning/DependencyScanningTool.cpp
  clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
  clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp
  clang/tools/clang-scan-deps/ClangScanDeps.cpp

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