[PATCH] D88594: [OpenMP] Add Error Handling for Conflicting Pointer Sizes for Target Offload

[Alexey Bataev via Phabricator via llvm-commits]

ABataev added inline comments.


================
Comment at: clang/lib/Frontend/CompilerInvocation.cpp:3209-3214
+      else if ((T.isArch64Bit() && TT.isArch32Bit()) ||
+               (T.isArch64Bit() && TT.isArch16Bit()) ||
+               (T.isArch32Bit() && TT.isArch64Bit()) ||
+               (T.isArch32Bit() && TT.isArch16Bit()) ||
+               (T.isArch16Bit() && TT.isArch32Bit()) ||
+               (T.isArch16Bit() && TT.isArch64Bit()))
----------------
jhuber6 wrote:
> ABataev wrote:
> > Maybe do something like `Triple::getArchPointerBitWidth(T.getArch()) != Triple::getArchPointerBitWidth(TT.getArch())"?
> That was my first thought but that function is private to the Triple class so I just went with this brute force method. The file has this comment for the justification.
> 
> 
> ```
>    /// Test whether the architecture is 64-bit
>    ///
>    /// Note that this tests for 64-bit pointer width, and nothing else. Note
>    /// that we intentionally expose only three predicates, 64-bit, 32-bit, and
>    /// 16-bit. The inner details of pointer width for particular architectures
>    /// is not summed up in the triple, and so only a coarse grained predicate
>    /// system is provided.
> ```
Would it be better to convert the results of `isArch...Bit()` to enum and compare enums then? Like:
```
enum {Arch16bit, Arch32bit, Arch64bit} TArch, TTArch;

if (T.isArch16Bit())
  Tarch = Arch16Bit;
else if ...
...
// Same for TT.
if (TArch != TTArch)
...
```


Repository:
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  https://reviews.llvm.org/D88594/new/

https://reviews.llvm.org/D88594