1 files changed, 78 insertions, 14 deletions

diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
index 2c480c1094a5..fec1985ccaca 100644
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -9,10 +9,14 @@
 #include "llvm/ADT/Triple.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Host.h"
+#include "llvm/Support/SwapByteOrder.h"
 #include "llvm/Support/TargetParser.h"
+#include "llvm/Support/VersionTuple.h"
+#include <cassert>
 #include <cstring>
 using namespace llvm;
 
@@ -625,6 +629,8 @@ static Triple::SubArchType parseSubArch(StringRef SubArchName) {
     return Triple::ARMSubArch_v8_4a;
   case ARM::ArchKind::ARMV8_5A:
     return Triple::ARMSubArch_v8_5a;
+  case ARM::ArchKind::ARMV8_6A:
+    return Triple::ARMSubArch_v8_6a;
   case ARM::ArchKind::ARMV8R:
     return Triple::ARMSubArch_v8r;
   case ARM::ArchKind::ARMV8MBaseline:
@@ -710,9 +716,7 @@ static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
 
   case Triple::ppc64:
   case Triple::ppc:
-    if (T.isOSDarwin())
-      return Triple::MachO;
-    else if (T.isOSAIX())
+    if (T.isOSAIX())
       return Triple::XCOFF;
     return Triple::ELF;
 
@@ -983,12 +987,7 @@ std::string Triple::normalize(StringRef Str) {
   }
 
   // Stick the corrected components back together to form the normalized string.
-  std::string Normalized;
-  for (unsigned i = 0, e = Components.size(); i != e; ++i) {
-    if (i) Normalized += '-';
-    Normalized += Components[i];
-  }
-  return Normalized;
+  return join(Components, "-");
 }
 
 StringRef Triple::getArchName() const {
@@ -1088,17 +1087,23 @@ bool Triple::getMacOSXVersion(unsigned &Major, unsigned &Minor,
     // Darwin version numbers are skewed from OS X versions.
     if (Major < 4)
       return false;
-    Micro = 0;
-    Minor = Major - 4;
-    Major = 10;
+    if (Major <= 19) {
+      Micro = 0;
+      Minor = Major - 4;
+      Major = 10;
+    } else {
+      Micro = 0;
+      Minor = 0;
+      // darwin20+ corresponds to macOS 11+.
+      Major = 11 + Major - 20;
+    }
     break;
   case MacOSX:
     // Default to 10.4.
     if (Major == 0) {
       Major = 10;
       Minor = 4;
-    }
-    if (Major != 10)
+    } else if (Major < 10)
       return false;
     break;
   case IOS:
@@ -1602,6 +1607,52 @@ std::string Triple::merge(const Triple &Other) const {
   return Other.str();
 }
 
+bool Triple::isMacOSXVersionLT(unsigned Major, unsigned Minor,
+                               unsigned Micro) const {
+  assert(isMacOSX() && "Not an OS X triple!");
+
+  // If this is OS X, expect a sane version number.
+  if (getOS() == Triple::MacOSX)
+    return isOSVersionLT(Major, Minor, Micro);
+
+  // Otherwise, compare to the "Darwin" number.
+  if (Major == 10) {
+    return isOSVersionLT(Minor + 4, Micro, 0);
+  } else {
+    assert(Major >= 11 && "Unexpected major version");
+    return isOSVersionLT(Major - 11 + 20, Minor, Micro);
+  }
+}
+
+VersionTuple Triple::getMinimumSupportedOSVersion() const {
+  if (getVendor() != Triple::Apple || getArch() != Triple::aarch64)
+    return VersionTuple();
+  switch (getOS()) {
+  case Triple::MacOSX:
+    // ARM64 slice is supported starting from macOS 11.0+.
+    return VersionTuple(11, 0, 0);
+  case Triple::IOS:
+    // ARM64 slice is supported starting from Mac Catalyst 14 (macOS 11).
+    // ARM64 simulators are supported for iOS 14+.
+    if (isMacCatalystEnvironment() || isSimulatorEnvironment())
+      return VersionTuple(14, 0, 0);
+    break;
+  case Triple::TvOS:
+    // ARM64 simulators are supported for tvOS 14+.
+    if (isSimulatorEnvironment())
+      return VersionTuple(14, 0, 0);
+    break;
+  case Triple::WatchOS:
+    // ARM64 simulators are supported for watchOS 7+.
+    if (isSimulatorEnvironment())
+      return VersionTuple(7, 0, 0);
+    break;
+  default:
+    break;
+  }
+  return VersionTuple();
+}
+
 StringRef Triple::getARMCPUForArch(StringRef MArch) const {
   if (MArch.empty())
     MArch = getArchName();
@@ -1664,3 +1715,16 @@ StringRef Triple::getARMCPUForArch(StringRef MArch) const {
 
   llvm_unreachable("invalid arch name");
 }
+
+VersionTuple Triple::getCanonicalVersionForOS(OSType OSKind,
+                                              const VersionTuple &Version) {
+  switch (OSKind) {
+  case MacOSX:
+    // macOS 10.16 is canonicalized to macOS 11.
+    if (Version == VersionTuple(10, 16))
+      return VersionTuple(11, 0);
+    LLVM_FALLTHROUGH;
+  default:
+    return Version;
+  }
+}