yaxunl added inline comments.
================
Comment at: clang/lib/CodeGen/TargetInfo.cpp:9468
+ // Control constants for math operations.
+ AddGlobal("__oclc_wavefrontsize64", Wavefront64, /*Size=*/8);
+ AddGlobal("__oclc_daz_opt", DenormAreZero, /*Size=*/8);
----------------
jhuber6 wrote:
> arsenm wrote:
> > yaxunl wrote:
> > > we need to disable emitting these variables for HIP -fgpu-rdc mode and
> > > OpenCL since they will break per-TU control variable. Other cases are OK.
> > wavefrontsize belongs with the system ones
> But the code would still depend on these and they wouldn't be present right
> wavefrontsize belongs with the system ones
You are right. `__oclc_wavefrontsize64` should always be emitted with
linkonce_odr linkage since they need to be consistent among TU's. Therefore
they should always be emitted.
`__oclc_daz_opt`, `__oclc_finite_only_opt`, `__oclc_unsafe_math_opt`, and
`__oclc_correctly_rounded_sqrt32` can be different per TU, therefore they
should not be emitted for HIP `-fgpu-rdc` and OpenCL.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D130096/new/
https://reviews.llvm.org/D130096
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