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Add #objectFormat compilation conditional (SE-0492) #80212

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Merged
merged 2 commits into from
Oct 23, 2025
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Merged

Add #objectFormat compilation conditional (SE-0492) #80212

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c3f865b
Add #objectFormat compilation conditional (SE-0492)
kubamracek Oct 16, 2025
4923db8
Adjust PlatformConditionKinds.def + target #objectFormat test more pr…
kubamracek Oct 22, 2025
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3 changes: 3 additions & 0 deletions include/swift/AST/PlatformConditionKinds.def
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Expand Up @@ -49,5 +49,8 @@ PLATFORM_CONDITION_(PtrAuth, "ptrauth")
/// The active arch target's max atomic bit width.
PLATFORM_CONDITION_(HasAtomicBitWidth, "hasAtomicBitWidth")

/// The active target's file format (Mach-O, ELF, COFF, WASM)
PLATFORM_CONDITION(ObjectFileFormat, "objectFormat")

#undef PLATFORM_CONDITION
#undef PLATFORM_CONDITION_
4 changes: 4 additions & 0 deletions lib/ASTGen/Sources/ASTGen/CompilerBuildConfiguration.swift
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Expand Up @@ -120,6 +120,10 @@ struct CompilerBuildConfiguration: BuildConfiguration {
staticBuildConfiguration.targetPointerBitWidth
}

func isActiveTargetObjectFormat(name: String) throws -> Bool {
try staticBuildConfiguration.isActiveTargetObjectFormat(name: name)
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@DougGregor DougGregor Oct 23, 2025

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It doesn't really matter, but I would expect this never to throw, because it's just querying the static build configuration

}

var targetAtomicBitWidths: [Int] {
staticBuildConfiguration.targetAtomicBitWidths
}
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4 changes: 4 additions & 0 deletions lib/ASTGen/Sources/ASTGen/EmbeddedSupport.swift
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Expand Up @@ -124,6 +124,10 @@ struct EmbeddedBuildConfiguration: BuildConfiguration {
return configuration.targetPointerBitWidth
}

func isActiveTargetObjectFormat(name: String) throws -> Bool {
return try configuration.isActiveTargetObjectFormat(name: name)
}

var targetAtomicBitWidths: [Int] {
return configuration.targetAtomicBitWidths
}
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31 changes: 26 additions & 5 deletions lib/Basic/LangOptions.cpp
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Expand Up @@ -141,13 +141,20 @@ static const SupportedConditionalValue SupportedConditionalCompilationHasAtomicB
"_128"
};

static const SupportedConditionalValue SupportedConditionalCompilationObjectFileFormats[] = {
"MachO",
"ELF",
"COFF",
"Wasm",
};

static const PlatformConditionKind AllPublicPlatformConditionKinds[] = {
#define PLATFORM_CONDITION(LABEL, IDENTIFIER) PlatformConditionKind::LABEL,
#define PLATFORM_CONDITION_(LABEL, IDENTIFIER)
#include "swift/AST/PlatformConditionKinds.def"
};

ArrayRef<SupportedConditionalValue> getSupportedConditionalCompilationValues(const PlatformConditionKind &Kind) {
static ArrayRef<SupportedConditionalValue> getSupportedConditionalCompilationValues(const PlatformConditionKind &Kind) {
switch (Kind) {
case PlatformConditionKind::OS:
return SupportedConditionalCompilationOSs;
Expand All @@ -167,12 +174,14 @@ ArrayRef<SupportedConditionalValue> getSupportedConditionalCompilationValues(con
return SupportedConditionalCompilationPtrAuthSchemes;
case PlatformConditionKind::HasAtomicBitWidth:
return SupportedConditionalCompilationHasAtomicBitWidths;
case PlatformConditionKind::ObjectFileFormat:
return SupportedConditionalCompilationObjectFileFormats;
}
llvm_unreachable("Unhandled PlatformConditionKind in switch");
}

PlatformConditionKind suggestedPlatformConditionKind(PlatformConditionKind Kind, const StringRef &V,
std::vector<StringRef> &suggestedValues) {
static PlatformConditionKind suggestedPlatformConditionKind(PlatformConditionKind Kind, const StringRef &V,
std::vector<StringRef> &suggestedValues) {
std::string lower = V.lower();
for (const PlatformConditionKind& candidateKind : AllPublicPlatformConditionKinds) {
if (candidateKind != Kind) {
Expand All @@ -191,8 +200,8 @@ PlatformConditionKind suggestedPlatformConditionKind(PlatformConditionKind Kind,
return Kind;
}

bool isMatching(PlatformConditionKind Kind, const StringRef &V,
PlatformConditionKind &suggestedKind, std::vector<StringRef> &suggestions) {
static bool isMatching(PlatformConditionKind Kind, const StringRef &V,
PlatformConditionKind &suggestedKind, std::vector<StringRef> &suggestions) {
// Compare against known values, ignoring case to avoid penalizing
// characters with incorrect case.
unsigned minDistance = std::numeric_limits<unsigned>::max();
Expand Down Expand Up @@ -231,6 +240,7 @@ checkPlatformConditionSupported(PlatformConditionKind Kind, StringRef Value,
case PlatformConditionKind::TargetEnvironment:
case PlatformConditionKind::PtrAuth:
case PlatformConditionKind::HasAtomicBitWidth:
case PlatformConditionKind::ObjectFileFormat:
return isMatching(Kind, Value, suggestedKind, suggestedValues);
case PlatformConditionKind::CanImport:
// All importable names are valid.
Expand Down Expand Up @@ -649,6 +659,17 @@ std::pair<bool, bool> LangOptions::setTarget(llvm::Triple triple) {
addPlatformConditionValue(PlatformConditionKind::PointerBitWidth, "_64");
}

// Set the "objectFormat" platform condition.
if (Target.isOSBinFormatMachO()) {
addPlatformConditionValue(PlatformConditionKind::ObjectFileFormat, "MachO");
} else if (Target.isOSBinFormatELF()) {
addPlatformConditionValue(PlatformConditionKind::ObjectFileFormat, "ELF");
} else if (Target.isOSBinFormatCOFF()) {
addPlatformConditionValue(PlatformConditionKind::ObjectFileFormat, "COFF");
} else if (Target.isOSBinFormatWasm()) {
addPlatformConditionValue(PlatformConditionKind::ObjectFileFormat, "Wasm");
}

// Set the "runtime" platform condition.
addPlatformConditionValue(PlatformConditionKind::Runtime,
EnableObjCInterop ? "_ObjC" : "_Native");
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1 change: 1 addition & 0 deletions lib/Basic/LangOptionsBridging.cpp
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Expand Up @@ -228,6 +228,7 @@ void BridgedLangOptions_enumerateBuildConfigurationEntries(

case PlatformConditionKind::Endianness:
case PlatformConditionKind::PointerBitWidth:
case PlatformConditionKind::ObjectFileFormat:
case PlatformConditionKind::CanImport:
case PlatformConditionKind::HasAtomicBitWidth:
// Handled separately.
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4 changes: 3 additions & 1 deletion lib/Parse/ParseIfConfig.cpp
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Expand Up @@ -385,7 +385,7 @@ class ValidateIfConfigCondition :
return E;
}

// ( 'os' | 'arch' | '_endian' | '_pointerBitWidth' | '_runtime' | '_hasAtomicBitWidth' ) '(' identifier ')''
// ( 'os' | 'arch' | '_endian' | '_pointerBitWidth' | '_runtime' | '_hasAtomicBitWidth' | 'objectFormat' ) '(' identifier ')''
auto Kind = getPlatformConditionKind(*KindName);
if (!Kind.has_value()) {
D.diagnose(E->getLoc(), diag::unsupported_platform_condition_expression);
Expand Down Expand Up @@ -429,6 +429,8 @@ class ValidateIfConfigCondition :
DiagName = "pointer authentication scheme"; break;
case PlatformConditionKind::HasAtomicBitWidth:
DiagName = "has atomic bit width"; break;
case PlatformConditionKind::ObjectFileFormat:
DiagName = "object file format"; break;
case PlatformConditionKind::Runtime:
llvm_unreachable("handled above");
}
Expand Down
48 changes: 48 additions & 0 deletions test/Parse/ConditionalCompilation/object_file_format.swift
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@@ -0,0 +1,48 @@
// RUN: %swift -typecheck %s -target arm64-apple-none-macho -parse-stdlib 2>&1 | %FileCheck -check-prefix CHECK-MACHO %s
// RUN: %swift -typecheck %s -target arm64-apple-none-elf -parse-stdlib 2>&1 | %FileCheck -check-prefix CHECK-ELF %s
// RUN: %swift -typecheck %s -target wasm32-unknown-wasi -parse-stdlib 2>&1 | %FileCheck -check-prefix CHECK-WASM %s
// RUN: %swift -typecheck %s -target x86_64-unknown-windows-msvc -parse-stdlib 2>&1 | %FileCheck -check-prefix CHECK-COFF %s

#if objectFormat(MachO)
#warning("I'm MachO")
#else
#warning("I'm not MachO")
#endif

#if objectFormat(ELF)
#warning("I'm ELF")
#else
#warning("I'm not ELF")
#endif

#if objectFormat(Wasm)
#warning("I'm Wasm")
#else
#warning("I'm not Wasm")
#endif

#if objectFormat(COFF)
#warning("I'm COFF")
#else
#warning("I'm not COFF")
#endif

// CHECK-MACHO: I'm MachO
// CHECK-MACHO: I'm not ELF
// CHECK-MACHO: I'm not Wasm
// CHECK-MACHO: I'm not COFF

// CHECK-ELF: I'm not MachO
// CHECK-ELF: I'm ELF
// CHECK-ELF: I'm not Wasm
// CHECK-ELF: I'm not COFF

// CHECK-WASM: I'm not MachO
// CHECK-WASM: I'm not ELF
// CHECK-WASM: I'm Wasm
// CHECK-WASM: I'm not COFF

// CHECK-COFF: I'm not MachO
// CHECK-COFF: I'm not ELF
// CHECK-COFF: I'm not Wasm
// CHECK-COFF: I'm COFF