[IRGen][wasm] Disable manual indirection for coroutine yielding results #85358
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`clang::CodeGen::swiftcall::shouldPassIndirectly` now returns true for multiple scalar values on wasm targets because the Wasm MVP does not support multiple return values. For such targets where we can't directly return two pointers, we should not attempt to indirect at this stage because the later MC lowering will also indirect the return.
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clang::CodeGen::swiftcall::shouldPassIndirectlynow returns true for multiple scalar values on wasm targets because the Wasm MVP does not support multiple return values. For such targets where we can't directly return two pointers, we should not attempt to indirect at this stage because the later MC lowering will also indirect the return.