jhuber6 marked an inline comment as done.
jhuber6 added inline comments.
================
Comment at: openmp/runtime/test/tasking/kmp_taskloop.c:100
th_counter[i] = 0;
- #pragma omp parallel num_threads(N)
+ #pragma omp parallel // num_threads(N)
{
----------------
jhuber6 wrote:
> jdoerfert wrote:
> > jhuber6 wrote:
> > > I am not entirely sure why, but commenting this out causes the problem to
> > > go away. I tried adding proper names to the forward-declared functions
> > > but since clang already knew I had something called ident_t, I couldn't
> > > declare a new struct with the same name.
> > This is not good. The difference should only be that the `kmpc_fork_call`
> > has a different argument, right? Does the segfault happen at compile or
> > runtime?
> >
> > You can just use the ident_t clang created, right? Did you print the
> > function names requested by clang as we discussed?
> I added an assertion and debug statements. If I try to declare a struct named
> "Ident_t" I get the following error message in the seg-fault. I think the
> seg-fault is compile-time.
>
> Found OpenMP runtime function __kmpc_global_thread_num with type i32
> (%struct.ident_t.0*). Expected type is i32 (%struct.ident_t*)
> clang:
> /home/jhuber/Documents/llvm-project/llvm/lib/Frontend/OpenMP/OMPIRBuilder.cpp:124:
> static llvm::Function*
> llvm::OpenMPIRBuilder::getOrCreateRuntimeFunction(llvm::Module&,
> llvm::omp::RuntimeFunction): Assertion `FnTy == Fn->getFunctionType() &&
> "Found OpenMP runtime function has mismatched types"' failed.
I'm not sure if there's a way around this without changing the
getOrCreateRuntimeFunction method to return a FunctionCallee and removing the
assertion. Clang doesn't know about the ident_t struct when it's compiling the
file, but when its doing the codegen it sees two structs with the same name and
creates a new name. So when it gets the types it says that ident_t and
ident_t.0 don't match. As you said the old version got around this by adding a
bitcasting instruction so it knew how to turn it into an ident_t pointer.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D80222/new/
https://reviews.llvm.org/D80222
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