[PATCH] D95976: [OpenMP] Simplify offloading parallel call codegen

[Michael Kruse via Phabricator via cfe-commits]

Meinersbur accepted this revision.
Meinersbur added a comment.
This revision is now accepted and ready to land.

This test seem to pass on Windows now. Please still fix the clang-format remarks, such as going over 80 characters on a line.



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Comment at: clang/lib/CodeGen/CGOpenMPRuntimeGPU.cpp:1150
   llvm::Value *IsMaster =
       Bld.CreateICmpEQ(RT.getGPUThreadID(CGF), getMasterThreadID(CGF));
   Bld.CreateCondBr(IsMaster, MasterBB, EST.ExitBB);
----------------
ggeorgakoudis wrote:
> Meinersbur wrote:
> > There seem to be more unordered codegen calls, such as this one.
> Some previous emitted values can be re-used, e.g., GPUThreadID in line 1150 can re-use the value from line 1140 , instead of re-emitted. I've kept emitting them as it was previously done. What is the preferred way to handle those? 
`getGPUThreadID`/`getMasterThreadID` could cache the value if used multiple times., but it would also require to put them into the entry block to be available anywhere in the function.

Otherwise, use a best-effort to minimize overhead even if the optimizer cannot unify them or in debug builds.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D95976/new/

https://reviews.llvm.org/D95976