jdoerfert added inline comments.

================
Comment at: clang/lib/CodeGen/CGOpenMPRuntime.cpp:2944-2947
+    // This could happen if the device compilation is invoked standalone.
+    if (!hasTargetRegionEntryInfo(DeviceID, FileID, ParentName, LineNum))
+      initializeTargetRegionEntryInfo(DeviceID, FileID, ParentName, LineNum,
+                                      OffloadingEntriesNum);
----------------
tianshilei1992 wrote:
> ABataev wrote:
> > jdoerfert wrote:
> > > ABataev wrote:
> > > > I would add a chack that to auxiliary device was specified. And if it 
> > > > was specified, it means this is not device-only mode and still need to 
> > > > emit an error.
> > > No it doesn't. There is nothing wrong with https://godbolt.org/z/T1h9b5, 
> > > and as I said before, I can build the situation in various other ways as 
> > > well, some of which will be outside of the users control. A global can 
> > > exist in the host/device code only.
> > I'm not saying that this is wrong. This code was used to check that the 
> > compiler works correctly and it just allows developer to understand that 
> > there is a problem with the compiler if it misses something and there is a 
> > difference between host and device codegens. If we don't want to emit an 
> > error here, still would be good to have something like an assert to be sure 
> > that the host/device codegens are synced.
> That check still doesn't work for the test case provided by @jdoerfert 
> because host IR doesn't contain that global in the offload info.
As @tianshilei1992 says, my test case does show how this can never be an 
assertion/warning even for regular host+device compliation. There is no 
guarantee a host version exists, or a device one does. We need to gracefully 
allow either.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D94871/new/

https://reviews.llvm.org/D94871

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