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chromium / chromium / src / 54969766fd2029c506befc46e9ce14d67c7ed02a
commit54969766fd2029c506befc46e9ce14d67c7ed02a[log] [tgz]
authorArthur Eubanks <aeubanks@google.com>Tue Apr 25 03:05:19 2023
committerChromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com>Tue Apr 25 03:05:19 2023
treef6ff65f52e2450b9078890c6e311a0772843a6b8
parent13269d83de67a71b3c19fb7704e22c6fcc450024 [diff]
Reland [clang] Disable autoupgrading debug info in ThinLTO builds

ThinLTO reads bitcode many times and attempts to upgrade the debug info every time. This is expensive since it calls the verifier. We don't need this given all LLVM bitcode producers are from the same version of LLVM.

For just the build step that runs ThinLTO and links official Chrome, measured 34T -> 32T instructions via perf stat.

Reland disables adding flag for ChromeOS since that toolchain is too old to have this flag.

Bug: 972449
Change-Id: I44552dd6c9dc71683c002d0c885e78b2a4341659
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4470209
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Arthur Eubanks <aeubanks@google.com>
Cr-Commit-Position: refs/heads/main@{#1135007}
1 file changed
tree: f6ff65f52e2450b9078890c6e311a0772843a6b8
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. ATL_OWNERS
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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