DavidSpickett wrote:
That build sets `-DLLVM_ENABLE_THREADS=OFF`. `LLVM_HAS_SPLIT_STACKS_AARCH64`
and `LLVM_HAS_SPLIT_STACKS` are false, which means we use:
```
void llvm::runOnNewStack(unsigned StackSize, function_ref<void()> Fn) {
llvm::thread Thread(
StackSize == 0 ? std::nullopt : std::optional<unsigned>(StackSize), Fn);
Thread.join();
}
```
Without threading I think this just calls the function.
So this test may need to 1 - only run on Apple Silicon and 2 - only when
threading is enabled. I wonder if it passes on other platforms because stack
protections make the offset look correct, something like that. We did not see
this failing on AArch64 Linux for example.
https://github.com/llvm/llvm-project/pull/136046
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