[Flang] Turn on alias analysis for locally allocated objects

We can turn on alias analysis for local objects for AOMP compiler.
Usptream patch: llvm#139682
was reverted due to ARM-specific issue in Fujitsu test suite:
https://github.com/fujitsu/compiler-test-suite/blob/main/Fortran/0614/0614_0005.f

Author: DominikAdamski

clang/lib/Driver/ToolChains/Flang.cpp

@@ -530,6 +530,15 @@ void Flang::addTargetOptions(const ArgList &Args,
       CmdArgs.push_back(A->getValue());
   }
 
+  // FIXME: Remove it when local alias tags are generated by default
+  //  See: https://github.com/llvm/llvm-project/pull/139682
+  //  We need this downstream hack due to ARM failure for test case:
+  //  https://github.com/fujitsu/compiler-test-suite/blob/main/Fortran/0614/0614_0005.f
+  if (!Triple.isARM()) {
+    CmdArgs.push_back("-mmlir");
+    CmdArgs.push_back("-local-alloc-tbaa");
+  }
+
   Args.addAllArgs(CmdArgs,
                   {options::OPT_fverbose_asm, options::OPT_fno_verbose_asm});
 }