Automatic Reference Counting.
Language-design credit goes to a lot of people, but I particularly want
to single out Blaine Garst and Patrick Beard for their contributions.
Compiler implementation credit goes to Argyrios, Doug, Fariborz, and myself,
in no particular order.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133103 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index ca613e3..35e7d80 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -26,6 +26,7 @@
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
@@ -41,7 +42,8 @@
/// Darwin - Darwin tool chain for i386 and x86_64.
Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple)
- : ToolChain(Host, Triple), TargetInitialized(false)
+ : ToolChain(Host, Triple), TargetInitialized(false),
+ ARCRuntimeForSimulator(ARCSimulator_None)
{
// Compute the initial Darwin version based on the host.
bool HadExtra;
@@ -70,6 +72,25 @@
return true;
}
+/// Darwin provides an ARC runtime starting in MacOS X 10.7 and iOS 5.0.
+bool Darwin::HasARCRuntime() const {
+ // FIXME: Remove this once there is a proper way to detect an ARC runtime
+ // for the simulator.
+ switch (ARCRuntimeForSimulator) {
+ case ARCSimulator_None:
+ break;
+ case ARCSimulator_HasARCRuntime:
+ return true;
+ case ARCSimulator_NoARCRuntime:
+ return false;
+ }
+
+ if (isTargetIPhoneOS())
+ return !isIPhoneOSVersionLT(5);
+ else
+ return !isMacosxVersionLT(10, 7);
+}
+
// FIXME: Can we tablegen this?
static const char *GetArmArchForMArch(llvm::StringRef Value) {
if (Value == "armv6k")
@@ -320,6 +341,30 @@
CmdArgs.push_back(Args.MakeArgString("-L" + P.str()));
}
+void DarwinClang::AddLinkARCArgs(const ArgList &Args,
+ ArgStringList &CmdArgs) const {
+
+ CmdArgs.push_back("-force_load");
+ llvm::sys::Path P(getDriver().ClangExecutable);
+ P.eraseComponent(); // 'clang'
+ P.eraseComponent(); // 'bin'
+ P.appendComponent("lib");
+ P.appendComponent("arc");
+ P.appendComponent("libarclite_");
+ std::string s = P.str();
+ // Mash in the platform.
+ if (isTargetIPhoneOS())
+ s += "iphoneos";
+ // FIXME: isTargetIphoneOSSimulator() is not returning true.
+ else if (ARCRuntimeForSimulator != ARCSimulator_None)
+ s += "iphonesimulator";
+ else
+ s += "macosx";
+ s += ".a";
+
+ CmdArgs.push_back(Args.MakeArgString(s));
+}
+
void DarwinClang::AddLinkRuntimeLibArgs(const ArgList &Args,
ArgStringList &CmdArgs) const {
// Darwin doesn't support real static executables, don't link any runtime
@@ -389,6 +434,35 @@
}
}
+static inline llvm::StringRef SimulatorVersionDefineName() {
+ return "__IPHONE_OS_VERSION_MIN_REQUIRED";
+}
+
+/// \brief Parse the simulator version define:
+/// __IPHONE_OS_VERSION_MIN_REQUIRED=([0-9])([0-9][0-9])([0-9][0-9])
+// and return the grouped values as integers, e.g:
+// __IPHONE_OS_VERSION_MIN_REQUIRED=40201
+// will return Major=4, Minor=2, Micro=1.
+static bool GetVersionFromSimulatorDefine(llvm::StringRef define,
+ unsigned &Major, unsigned &Minor,
+ unsigned &Micro) {
+ assert(define.startswith(SimulatorVersionDefineName()));
+ llvm::StringRef name, version;
+ llvm::tie(name, version) = define.split('=');
+ if (version.empty())
+ return false;
+ std::string verstr = version.str();
+ char *end;
+ unsigned num = (unsigned) strtol(verstr.c_str(), &end, 10);
+ if (*end != '\0')
+ return false;
+ Major = num / 10000;
+ num = num % 10000;
+ Minor = num / 100;
+ Micro = num % 100;
+ return true;
+}
+
void Darwin::AddDeploymentTarget(DerivedArgList &Args) const {
const OptTable &Opts = getDriver().getOpts();
@@ -396,6 +470,27 @@
Arg *iOSVersion = Args.getLastArg(options::OPT_miphoneos_version_min_EQ);
Arg *iOSSimVersion = Args.getLastArg(
options::OPT_mios_simulator_version_min_EQ);
+
+ // FIXME: HACK! When compiling for the simulator we don't get a
+ // '-miphoneos-version-min' to help us know whether there is an ARC runtime
+ // or not; try to parse a __IPHONE_OS_VERSION_MIN_REQUIRED
+ // define passed in command-line.
+ if (!iOSVersion) {
+ for (arg_iterator it = Args.filtered_begin(options::OPT_D),
+ ie = Args.filtered_end(); it != ie; ++it) {
+ llvm::StringRef define = (*it)->getValue(Args);
+ if (define.startswith(SimulatorVersionDefineName())) {
+ unsigned Major, Minor, Micro;
+ if (GetVersionFromSimulatorDefine(define, Major, Minor, Micro) &&
+ Major < 10 && Minor < 100 && Micro < 100) {
+ ARCRuntimeForSimulator = Major < 5 ? ARCSimulator_NoARCRuntime
+ : ARCSimulator_HasARCRuntime;
+ }
+ break;
+ }
+ }
+ }
+
if (OSXVersion && (iOSVersion || iOSSimVersion)) {
getDriver().Diag(clang::diag::err_drv_argument_not_allowed_with)
<< OSXVersion->getAsString(Args)