[Clang] [AArch64] [DFSan] Adding support of AArch64 for DFSan

[sdkie]

Summary

Enabling DFSan in Clang for AArch64

[pcc]

LGTM, but this will probably need to be updated.

[Eugene.Zelenko]

Looks like patch was not committed. But does it still make sense?

[shafik]

Ping should we close this?

lib/Driver/SanitizerArgs.cpp

 
 static uint64_t getToolchainUnsupportedKinds(const ToolChain &TC) {
   bool IsFreeBSD = TC.getTriple().getOS() == llvm::Triple::FreeBSD;
   bool IsLinux = TC.getTriple().getOS() == llvm::Triple::Linux;
   bool IsX86 = TC.getTriple().getArch() == llvm::Triple::x86;
   bool IsX86_64 = TC.getTriple().getArch() == llvm::Triple::x86_64;
   bool IsMIPS64 = TC.getTriple().getArch() == llvm::Triple::mips64 ||
                   TC.getTriple().getArch() == llvm::Triple::mips64el;
+  bool IsAArch64 = TC.getTriple().getArch() == llvm::Triple::aarch64;
 
   uint64_t Unsupported = 0;
   if (!(IsLinux && (IsX86_64 || IsMIPS64))) {
-    Unsupported |= Memory | DataFlow;
+    Unsupported |= Memory;
+  }
+  if (!(IsLinux && (IsX86_64 || IsMIPS64 || IsAArch64))) {
+    Unsupported |= DataFlow;
   }
   if (!((IsLinux || IsFreeBSD) && (IsX86_64 || IsMIPS64))) {
     Unsupported |= Thread;
   }
   if (!(IsLinux && (IsX86 || IsX86_64))) {
     Unsupported |= Function;
   }
   return Unsupported;