rjmccall added inline comments.
================
Comment at: clang/lib/Sema/SemaChecking.cpp:5011
+ !ValType->isFloatingType()) {
+ Diag(ExprRange.getBegin(),
diag::err_atomic_op_needs_atomic_int_ptr_or_fp)
<< IsC11 << Ptr->getType() << Ptr->getSourceRange();
----------------
yaxunl wrote:
> rjmccall wrote:
> > Does LLVM support atomics on all floating-point types?
> LLVM IR parser requires atomicrmw value operand must have size of power of 2,
> therefore LLVM does not support atomicrmw on x86_fp80 which has size of 80
> bytes. LLVM supports atomicrmw on all other floating-point types (bfloat,
> half, float, double, fp128, ppc_fp128).
Okay. So this needs to check the underlying FP semantics and disallow atomics
on unsupported types.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D71726/new/
https://reviews.llvm.org/D71726
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