[clang] [CLANG] Full support of complex multiplication and division. (PR #81514)

[Zahira Ammarguellat via cfe-commits]

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@@ -1041,28 +1041,15 @@ defm offload_uniform_block : BoolFOption<"offload-uniform-block",
   NegFlag<SetFalse, [], [ClangOption, CC1Option], "Don't assume">,
   BothFlags<[], [ClangOption], " that kernels are launched with uniform block sizes (default true for CUDA/HIP and false otherwise)">>;
 
-def fcx_limited_range : Joined<["-"], "fcx-limited-range">,
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zahiraam wrote:

yes there is a way of doing that:
```
def fcx_limited_range : Flag<["-"], "fcx-limited-range">,
  Group<f_Group>, Visibility<[ClangOption, CC1Option]>,
  HelpText<"Basic algebraic expansions of complex arithmetic operations "
           "involving are enabled.">,
  Alias<fcomplex_arithmetic_EQ>, AliasArgs<["basic"]>;
```

That still produces the misleading warning for: -fcx-limited-range -fcomplex-arithmetic=improved


https://github.com/llvm/llvm-project/pull/81514