[all-commits] [llvm/llvm-project] 615673: [Preamble] Invalidate preamble when missing header...

[Sam McCall via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 615673f3a10e98f33e2db64512be0452145236fe
      https://github.com/llvm/llvm-project/commit/615673f3a10e98f33e2db64512be0452145236fe
  Author: Sam McCall <sam.mccall at gmail.com>
  Date:   2020-06-08 (Mon, 08 Jun 2020)

  Changed paths:
    M clang-tools-extra/clangd/unittests/ClangdLSPServerTests.cpp
    M clang-tools-extra/clangd/unittests/TUSchedulerTests.cpp
    M clang/include/clang/Frontend/PrecompiledPreamble.h
    M clang/lib/Frontend/PrecompiledPreamble.cpp

  Log Message:
  -----------
  [Preamble] Invalidate preamble when missing headers become present.

Summary:
To avoid excessive extra stat()s, only check the possible locations of
headers that weren't found at all (leading to a compile error).
For headers that *were* found, we don't check for files earlier on the
search path that could override them.

Reviewers: kadircet

Subscribers: javed.absar, jkorous, arphaman, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D77942