https://bugs.llvm.org/show_bug.cgi?id=49777
Bug ID: 49777
Summary: Clang should not try to specialize orphaned directives
in device codegen
Product: OpenMP
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Clang Compiler Support
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
For this code (https://godbolt.org/z/TnErqhTzK)
```
void work();
void use() {
#pragma omp parallel
work();
}
int main() {
#pragma omp target parallel
{ use(); }
#pragma omp target
{ use(); }
}
```
clang will serialize the parallel region in `use`.
This is not technically wrong but arguably not the right thing to do.
Even if we would not have the second target region, the `use` function
can be reached from the outside and specialization should not occur
for it at all. In general, I don't believe we should specialize early.
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