Add arm64_32 support to lldb, an ILP32 codegen 
that runs on arm64 ISA targets, specifically 
Apple watches.


Differential Revision: https://reviews.llvm.org/D68858

llvm-svn: 375032
diff --git a/lldb/source/Symbol/ClangASTContext.cpp b/lldb/source/Symbol/ClangASTContext.cpp
index b373468..565b15a 100644
--- a/lldb/source/Symbol/ClangASTContext.cpp
+++ b/lldb/source/Symbol/ClangASTContext.cpp
@@ -578,6 +578,7 @@
           fixed_arch.GetTriple().getOS() == llvm::Triple::UnknownOS) {
         if (fixed_arch.GetTriple().getArch() == llvm::Triple::arm ||
             fixed_arch.GetTriple().getArch() == llvm::Triple::aarch64 ||
+            fixed_arch.GetTriple().getArch() == llvm::Triple::aarch64_32 ||
             fixed_arch.GetTriple().getArch() == llvm::Triple::thumb) {
           fixed_arch.GetTriple().setOS(llvm::Triple::IOS);
         } else {