81a650ee87
Add a new driver level flag `-fcf-runtime-abi=` that allows one to specify the
runtime ABI for CoreFoundation. This controls the language interoperability.
In particular, this is relevant for generating the CFConstantString classes
(primarily through the `__builtin___CFStringMakeConstantString` builtin) which
construct a reference to the "CFObject"'s `isa` field. This type differs
between swift 4.1 and 4.2+.
Valid values for the new option include:
- objc [default behaviour] - enable ObjectiveC interoperability
- swift-4.1 - enable interoperability with swift 4.1
- swift-4.2 - enable interoperability with swift 4.2
- swift-5.0 - enable interoperability with swift 5.0
- swift [alias] - target the latest swift ABI
Furthermore, swift 4.2+ changed the layout for the CFString when building
CoreFoundation *without* ObjectiveC interoperability. In such a case, a field
was added to the CFObject base type changing it from: <{ const int*, int }> to
<{ uintptr_t, uintptr_t, uint64_t }>.
In swift 5.0, the CFString type will be further adjusted to change the length
from a uint32_t on everything but BE LP64 targets to uint64_t.
Note that the default behaviour for clang remains unchanged and the new layout
must be explicitly opted into via `-fcf-runtime-abi=swift*`.
llvm-svn: 345222
23 lines
1.5 KiB
C
23 lines
1.5 KiB
C
// RUN: %clang -### -target aarch64-unknown-windows-msvc -c %s 2>&1 | FileCheck -check-prefix CHECK-UNSPECIFIED %s
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// RUN: %clang -### -target thumbv7-unknown-linux-android -c %s 2>&1 | FileCheck -check-prefix CHECK-UNSPECIFIED %s
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// RUN: %clang -### -target x86_64-apple-macosx -c %s 2>&1 | FileCheck -check-prefix CHECK-UNSPECIFIED %s
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// RUN: %clang -### -target aarch64-unknown-windows-msvc -fcf-runtime-abi=objc -c %s 2>&1 | FileCheck -check-prefix CHECK-OBJC %s
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// RUN: %clang -### -target thumbv7-unknown-linux-android -fcf-runtime-abi=swift-5.0 -c %s 2>&1 | FileCheck -check-prefix CHECK-SWIFT-5_0 %s
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// RUN: %clang -### -target i386-unknown-freebsd -fcf-runtime-abi=swift-4.2 -c %s 2>&1 | FileCheck -check-prefix CHECK-SWIFT-4_2 %s
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// RUN: %clang -### -target s390x-unknown-linux-gnu -fcf-runtime-abi=swift-4.1 -c %s 2>&1 | FileCheck -check-prefix CHECK-SWIFT-4_1 %s
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// RUN: %clang -### -target x86_64-apple-macosx -fcf-runtime-abi=swift -c %s 2>&1 | FileCheck -check-prefix CHECK-SWIFT %s
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// RUN: %clang -### -target arm7k-apple-watchos -fcf-runtime-abi=invalid -c %s 2>&1 | FileCheck -check-prefix CHECK-INVALID %s
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// CHECK-UNSPECIFIED-NOT: "-fcf-runtime-abi=
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// CHECK-OBJC: "-fcf-runtime-abi=objc"
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// CHECK-SWIFT-5_0: "-fcf-runtime-abi=swift-5.0"
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// CHECK-SWIFT-4_2: "-fcf-runtime-abi=swift-4.2"
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// CHECK-SWIFT-4_1: "-fcf-runtime-abi=swift-4.1"
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// CHECK-SWIFT: "-fcf-runtime-abi=swift"
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// CHECK-INVALID: error: invalid CoreFoundation Runtime ABI 'invalid'; must be one of 'objc', 'standalone', 'swift', 'swift-5.0', 'swift-4.2', 'swift-4.1'
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