[PATCH] D125349: [Sema] Fix crash for C11 atomic in gnu++ mode

[Jan Svoboda via Phabricator via cfe-commits]

jansvoboda11 marked an inline comment as done.
jansvoboda11 added inline comments.


================
Comment at: clang/lib/Sema/SemaOverload.cpp:8982
 
     // Extension: Add the binary operators =, +=, -=, *=, /= for vector types.
     for (QualType Vec1Ty : CandidateTypes[0].vector_types())
----------------
aaron.ballman wrote:
> Do we need to handle atomic vector types?
I tried those, but it appears vector types don't accept `_Atomic` element types:

```
typedef _Atomic unsigned v_a_unsigned __attribute__((__vector_size__(16)));
// error: invalid vector element type '_Atomic(unsigned int)'
```

And `_Atomic` vector gives this error:

```
typedef unsigned v_unsigned __attribute__((__vector_size__(16)));
typedef _Atomic v_unsigned a_v_unsigned;

a_v_unsigned avu;

void enum5() { avu += an_enum_value; }
void enum6() { avu |= an_enum_value; }
```

I'm not an expert in this area, so I can't say for sure this is the correct behavior. But at least we don't crash.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125349/new/

https://reviews.llvm.org/D125349