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graydongraydon
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[Bridging PCH] Add -enable-bridging-pch option, set default to disabled.
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6 files changed

+19
-13
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6 files changed

+19
-13
lines changed

‎include/swift/Option/Options.td‎

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Original file line numberDiff line numberDiff line change
@@ -237,6 +237,10 @@ def disable_swift_bridge_attr : Flag<["-"], "disable-swift-bridge-attr">,
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Flags<[FrontendOption, HelpHidden]>,
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HelpText<"Disable using the swift bridge attribute">;
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def enable_bridging_pch : Flag<["-"], "enable-bridging-pch">,
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Flags<[HelpHidden]>,
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HelpText<"Enable automatic generation of bridging PCH files">;
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def disable_bridging_pch : Flag<["-"], "disable-bridging-pch">,
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Flags<[HelpHidden]>,
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HelpText<"Disable automatic generation of bridging PCH files">;

‎lib/Driver/Driver.cpp‎

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1277,7 +1277,9 @@ void Driver::buildActions(const ToolChain &TC,
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// the header into a temporary PCH, and replace the import argument with the
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// PCH in the subsequent frontend jobs.
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JobAction *PCH = nullptr;
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if (!Args.hasArg(options::OPT_disable_bridging_pch)) {
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if (Args.hasFlag(options::OPT_enable_bridging_pch,
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options::OPT_disable_bridging_pch,
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false)) {
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if (Arg *A = Args.getLastArg(options::OPT_import_objc_header)) {
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StringRef Value = A->getValue();
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auto Ty = TC.lookupTypeForExtension(llvm::sys::path::extension(Value));

‎test/ClangImporter/pch-bridging-header-unittest-ok.swift‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -5,10 +5,10 @@
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// CHECK: IMPORTED_HEADER{{.*}}Inputs/app-bridging-header-to-pch.h
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// Should get no warnings when we PCH-in the chained unit-test bridging header (thereby suppressing implicit import)
8-
// RUN: %target-swiftc_driver -D UNIT_TESTS -typecheck -Xfrontend -verify -import-objc-header %S/Inputs/chained-unit-test-bridging-header-to-pch.h -I %S/Inputs -I %t %s
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// RUN: %target-swiftc_driver -D UNIT_TESTS -typecheck -Xfrontend -verify -enable-bridging-pch -import-objc-header %S/Inputs/chained-unit-test-bridging-header-to-pch.h -I %S/Inputs -I %t %s
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// Should get no warnings when we PCH-in the app bridging header (thereby suppressing implicit import)
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// RUN: %target-swiftc_driver -typecheck -Xfrontend -verify -import-objc-header %S/Inputs/app-bridging-header-to-pch.h -I %t %s
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// RUN: %target-swiftc_driver -typecheck -Xfrontend -verify -enable-bridging-pch -import-objc-header %S/Inputs/app-bridging-header-to-pch.h -I %t %s
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import App
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‎test/ClangImporter/pch-bridging-header-unittest-warn.swift‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -5,7 +5,7 @@
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// CHECK: IMPORTED_HEADER{{.*}}Inputs/app-bridging-header-to-pch.h
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// Should get a warning when we PCH-in the unit test header and then implicitly import the app header.
8-
// RUN: %target-swiftc_driver -D UNIT_TESTS -typecheck -Xfrontend -verify -import-objc-header %S/Inputs/unit-test-bridging-header-to-pch.h -I %t %s
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// RUN: %target-swiftc_driver -D UNIT_TESTS -typecheck -Xfrontend -verify -enable-bridging-pch -import-objc-header %S/Inputs/unit-test-bridging-header-to-pch.h -I %t %s
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// Should get a warning when skip the unit test header entirely and implicitly import the app header.
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// RUN: %target-swiftc_driver -typecheck -Xfrontend -verify -I %t %s

‎test/ClangImporter/pch-bridging-header.swift‎

Lines changed: 5 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -5,19 +5,19 @@
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// RUN: %target-swift-frontend -emit-pch -o %t/sdk-bridging-header.pch %S/Inputs/sdk-bridging-header.h
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// RUN: %target-swift-frontend -parse -verify %s -import-objc-header %t/sdk-bridging-header.pch
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// Now test the driver-automated version is inert when disabled
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// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -disable-bridging-pch -parse -save-temps %s -import-objc-header %S/Inputs/sdk-bridging-header.h
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// Now test the driver-automated version is inert when (default) disabled
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// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -parse -save-temps %s -import-objc-header %S/Inputs/sdk-bridging-header.h
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// RUN: not ls %t/tmp/*.pch >/dev/null 2>&1
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// Test the driver-automated version works when not-disabled
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// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -parse -save-temps %s -import-objc-header %S/Inputs/sdk-bridging-header.h
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// Test the driver-automated version works when enabled
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// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -parse -save-temps %s -enable-bridging-pch -import-objc-header %S/Inputs/sdk-bridging-header.h
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// RUN: ls %t/tmp/*.pch >/dev/null 2>&1
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// RUN: llvm-objdump -raw-clang-ast %t/tmp/*.pch | llvm-bcanalyzer -dump | %FileCheck %s
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// CHECK: ORIGINAL_FILE{{.*}}Inputs/sdk-bridging-header.h
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// Test the driver-automated version deletes its PCH file when done
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// RUN: rm %t/tmp/*.pch
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// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -parse %s -import-objc-header %S/Inputs/sdk-bridging-header.h
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// RUN: env TMPDIR=%t/tmp/ %target-swiftc_driver -parse %s -enable-bridging-pch -import-objc-header %S/Inputs/sdk-bridging-header.h
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// RUN: not ls %t/tmp/*.pch >/dev/null 2>&1
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import Foundation

‎test/Driver/bridging-pch.swift‎

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Original file line numberDiff line numberDiff line change
@@ -1,17 +1,17 @@
1-
// RUN: %swiftc_driver -typecheck -driver-print-actions -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=YESPCHACT
1+
// RUN: %swiftc_driver -typecheck -enable-bridging-pch -driver-print-actions -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=YESPCHACT
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// YESPCHACT: 0: input, "{{.*}}Inputs/bridging-header.h", objc-header
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// YESPCHACT: 1: generate-pch, {0}, pch
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// YESPCHACT: 2: input, "{{.*}}bridging-pch.swift", swift
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// YESPCHACT: 3: compile, {2, 1}, none
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7-
// RUN: %swiftc_driver -typecheck -disable-bridging-pch -driver-print-actions -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=NOPCHACT
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// RUN: %swiftc_driver -typecheck -driver-print-actions -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=NOPCHACT
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// NOPCHACT: 0: input, "{{.*}}bridging-pch.swift", swift
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// NOPCHACT: 1: compile, {0}, none
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// RUN: %swiftc_driver -typecheck -driver-print-jobs -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=YESPCHJOB
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// RUN: %swiftc_driver -typecheck -enable-bridging-pch -driver-print-jobs -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=YESPCHJOB
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// YESPCHJOB: {{.*}}swift -frontend {{.*}} -emit-pch -o {{.*}}bridging-header-{{.*}}.pch
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// YESPCHJOB: {{.*}}swift -frontend {{.*}} -import-objc-header {{.*}}bridging-header-{{.*}}.pch
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15-
// RUN: %swiftc_driver -typecheck -disable-bridging-pch -driver-print-jobs -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=NOPCHJOB
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// RUN: %swiftc_driver -typecheck -driver-print-jobs -import-objc-header %S/Inputs/bridging-header.h %s 2>&1 | %FileCheck %s -check-prefix=NOPCHJOB
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// NOPCHJOB: {{.*}}swift -frontend {{.*}} -import-objc-header {{.*}}Inputs/bridging-header.h
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