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Rdar 29016063 swift 3.1 branch precompile bridging header #6768

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Merged
merged 10 commits into from
Jan 13, 2017
Merged

Rdar 29016063 swift 3.1 branch precompile bridging header #6768

merged 10 commits into from
Jan 13, 2017

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graydon
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@graydon graydon commented Jan 13, 2017

Cherry-pick for swift-3.1-branch of #5977

Includes option setting the bridging PCH system to off by default.

See rdar://29016063

graydon added 10 commits January 12, 2017 17:00
@graydon
[Bridging PCH] Add ClangImporter::emitBridgingPCH.
4609464
@graydon
[Bridging PCH] Add -emit-pch to Frontend; call emitBridgingPCH.
f36f2af
@graydon
[Bridging PCH] Store ClangImporter::BridgingHeaderLookupTable indirec…
56c4acf 
…tly.
@graydon
[Bridging PCH] Populate bridging lookup table when reading MK_PCH mod…
7ac9b16 
…ule.
@graydon
[Bridging PCH] Pass .pch bridging headers to clang -import-pch
4617828
@graydon
[Bridging PCH] Add testcase for emitting, importing a bridging PCH file.
ddc997e
@graydon
[Bridging PCH] Auto-generate and use temporary bridging PCHs from dri…
2d398b6 
…ver.
@graydon
[Bridging PCH] Warn on non-redundant implicit bridging-header imports.
b90f524 
We're trying to get rid of implicit bridging-header imports, as a feature.
These are IMPORTED_HEADER blocks left in modules built with bridging
headers, that trigger re-importing the bridging header into any client
that imports the module.

As a half-way measure to deprecating them, we add a warning here that
triggers when an implicit bridging-header import occurs that is _not_
suppressed as redundant by clang.
@graydon
[Bridging PCH] Handle mixed PCH + implicit bridging header imports.
75fc21b 
This happens fairly regularly in unit testing scenarios.
@graydon
[Bridging PCH] Add -enable-bridging-pch option, set default to disabled.
d557114
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@swift-ci test

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graydon commented Jan 13, 2017

Unfortunately it won't build without its corresponding change in clang: apple/swift-clang#61

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Which we can do!

apple/swift-clang#61
@swift-ci Please test

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Build failed
Jenkins build - Swift Test OS X Platform
Git Commit - d557114
Test requested by - @jrose-apple

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…unless update_checkout fails for some reason. @erg?

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Build failed
Jenkins build - Swift Test Linux Platform
Git Commit - d557114
Test requested by - @jrose-apple

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graydon commented Jan 13, 2017

apple/swift-clang#61
@swift-ci Please test

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Build failed
Jenkins build - Swift Test OS X Platform
Git Commit - d557114
Test requested by - @graydon

@swift-ci
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Build failed
Jenkins build - Swift Test Linux Platform
Git Commit - d557114
Test requested by - @graydon

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graydon commented Jan 13, 2017

"18:39:57 NameError: global name 'lock' is not defined" uh yes, that's not me!

@tkremenek tkremenek merged commit badaeb2 into swiftlang:swift-3.1-branch Jan 13, 2017
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erg commented Jan 13, 2017 •
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The swift-3.1-branch got the update-checkout parallelize patch but not the fix for that patch 8526d16.

If you use shell.run before calling run_parallel the lock that synchronizes writes to console is not initialized yet.

This patch 8526d16 should get into swift-3.1-branch.

@erg erg mentioned this pull request Jan 13, 2017
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@graydon graydon deleted the rdar-29016063-swift-3.1-branch-precompile-bridging-header branch January 18, 2017 22:35
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@graydon @tkremenek @jrose-apple @swift-ci @erg