[PATCH] D115250: switched to emulated TLV on macOS before 10.7

[Kirill A. Korinsky via Phabricator via cfe-commits]

catap updated this revision to Diff 392715.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D115250/new/

https://reviews.llvm.org/D115250

Files:
  clang/lib/Basic/Targets/OSTargets.h
  clang/lib/CodeGen/ItaniumCXXABI.cpp
  llvm/include/llvm/ADT/Triple.h


Index: llvm/include/llvm/ADT/Triple.h
===================================================================
--- llvm/include/llvm/ADT/Triple.h
+++ llvm/include/llvm/ADT/Triple.h
@@ -839,7 +839,8 @@
 
   /// Tests whether the target uses emulated TLS as default.
   bool hasDefaultEmulatedTLS() const {
-    return isAndroid() || isOSOpenBSD() || isWindowsCygwinEnvironment();
+    return isAndroid() || isOSOpenBSD() || isWindowsCygwinEnvironment() ||
+           (isOSDarwin() && isMacOSXVersionLT(10, 7));
   }
 
   /// Tests whether the target uses -data-sections as default.
Index: clang/lib/CodeGen/ItaniumCXXABI.cpp
===================================================================
--- clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -2580,7 +2580,9 @@
   const char *Name = "__cxa_atexit";
   if (TLS) {
     const llvm::Triple &T = CGF.getTarget().getTriple();
-    Name = T.isOSDarwin() ?  "_tlv_atexit" : "__cxa_thread_atexit";
+    Name = (T.isOSDarwin() && !T.isMacOSXVersionLT(10, 7))
+               ? "_tlv_atexit"
+               : "__cxa_thread_atexit";
   }
 
   // We're assuming that the destructor function is something we can
Index: clang/lib/Basic/Targets/OSTargets.h
===================================================================
--- clang/lib/Basic/Targets/OSTargets.h
+++ clang/lib/Basic/Targets/OSTargets.h
@@ -91,7 +91,7 @@
     this->TLSSupported = false;
 
     if (Triple.isMacOSX())
-      this->TLSSupported = !Triple.isMacOSXVersionLT(10, 7);
+      this->TLSSupported = !Triple.isMacOSXVersionLT(10, 4);
     else if (Triple.isiOS()) {
       // 64-bit iOS supported it from 8 onwards, 32-bit device from 9 onwards,
       // 32-bit simulator from 10 onwards.


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