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Refactor to use RuntimeAvailability

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This commit is contained in:
Arnold Schwaighofer
2019-06-14 12:50:13 -07:00
parent f29b77f954
commit eb32194e97
8 changed files with 91 additions and 101 deletions
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80
lib/IRGen/IRGenModule.cpp
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@@ -527,31 +527,6 @@ IRGenModule::~IRGenModule() {
static bool isReturnAttribute(llvm::Attribute::AttrKind Attr);
static AvailabilityContext
getGetReplacementAvailability(ASTContext &context) {
auto target = context.LangOpts.Target;
if (target.isMacOSX()) {
return AvailabilityContext(
VersionRange::allGTE(llvm::VersionTuple(10, 15, 0)));
} else if (target.isiOS()) {
return AvailabilityContext(
VersionRange::allGTE(llvm::VersionTuple(13, 0, 0)));
} else if (target.isWatchOS()) {
return AvailabilityContext(
VersionRange::allGTE(llvm::VersionTuple(6, 0, 0)));
} else {
return AvailabilityContext::alwaysAvailable();
}
}
bool IRGenModule::isGetReplacementAvailable(ASTContext &Context) {
auto deploymentAvailability =
AvailabilityContext::forDeploymentTarget(Context);
auto featureAvailability = getGetReplacementAvailability(Context);
return deploymentAvailability.isContainedIn(featureAvailability);
}
// Explicitly listing these constants is an unfortunate compromise for
// making the database file much more compact.
//
@@ -564,22 +539,12 @@ namespace RuntimeConstants {
const auto NoUnwind = llvm::Attribute::NoUnwind;
const auto ZExt = llvm::Attribute::ZExt;
const auto FirstParamReturned = llvm::Attribute::Returned;
bool AlwaysAvailable(ASTContext &Context) {
return false;
}
bool OpaqueTypeAvailability(ASTContext &Context) {
auto deploymentAvailability =
AvailabilityContext::forDeploymentTarget(Context);
auto featureAvailability = Context.getOpaqueTypeAvailability();
return !deploymentAvailability.isContainedIn(featureAvailability);
}
bool GetReplacementAvailability(ASTContext &Context) {
return !IRGenModule::isGetReplacementAvailable(Context);
}
const auto AlwaysAvailable = RuntimeAvailability::AlwaysAvailable;
const auto AvailableByCompatibilityLibrary =
RuntimeAvailability::AvailableByCompatibilityLibrary;
const auto ConditionallyAvailable =
RuntimeAvailability::ConditionallyAvailable;
} // namespace RuntimeConstants
// We don't use enough attributes to justify generalizing the
@@ -623,13 +588,40 @@ llvm::Constant *swift::getRuntimeFn(llvm::Module &Module,
llvm::Constant *&cache,
const char *name,
llvm::CallingConv::ID cc,
bool isWeakLinked,
RuntimeAvailability availability,
ASTContext *context,
llvm::ArrayRef<llvm::Type*> retTypes,
llvm::ArrayRef<llvm::Type*> argTypes,
ArrayRef<Attribute::AttrKind> attrs) {
if (cache)
return cache;
bool isWeakLinked = false;
std::string functionName(name);
auto isFeatureAvailable = [&]() -> bool {
auto deploymentAvailability =
AvailabilityContext::forDeploymentTarget(*context);
auto featureAvailability = context->getSwift51Availability();
return deploymentAvailability.isContainedIn(featureAvailability);
};
switch (availability) {
case RuntimeAvailability::AlwaysAvailable:
// Nothing to do.
break;
case RuntimeAvailability::ConditionallyAvailable: {
isWeakLinked = !isFeatureAvailable();
break;
}
case RuntimeAvailability::AvailableByCompatibilityLibrary: {
if (!isFeatureAvailable())
functionName.append("50");
break;
}
}
llvm::Type *retTy;
if (retTypes.size() == 1)
retTy = *retTypes.begin();
@@ -641,7 +633,7 @@ llvm::Constant *swift::getRuntimeFn(llvm::Module &Module,
{argTypes.begin(), argTypes.end()},
/*isVararg*/ false);
cache = Module.getOrInsertFunction(name, fnTy);
cache = Module.getOrInsertFunction(functionName.c_str(), fnTy);
// Add any function attributes and set the calling convention.
if (auto fn = dyn_cast<llvm::Function>(cache)) {
@@ -696,7 +688,7 @@ llvm::Constant *swift::getRuntimeFn(llvm::Module &Module,
llvm::Constant *IRGenModule::get##ID##Fn() { \
using namespace RuntimeConstants; \
return getRuntimeFn(Module, ID##Fn, #NAME, CC, \
(AVAILABILITY)(this->Context), \
AVAILABILITY, &this->Context, \
RETURNS, ARGS, ATTRS); \
}