33add367e2
The `gpu-kernel` calling convention has several restrictions that were not enforced by the compiler until now. Add the following restrictions: 1. Cannot be async 2. Cannot be called 3. Cannot return values, return type must be `()` or `!` 4. Arguments should be primitives, i.e. passed by value. More complicated types can work when you know what you are doing, but it is rather unintuitive, one needs to know ABI/compiler internals. 5. Export name should be unmangled, either through `no_mangle` or `export_name`. Kernels are searched by name on the CPU side, having a mangled name makes it hard to find and probably almost always unintentional.
23 lines
575 B
Text
23 lines
575 B
Text
error: functions with the "gpu-kernel" ABI cannot be `async`
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--> $DIR/cannot-be-coroutine.rs:62:1
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LL | async extern "gpu-kernel" fn async_kernel() {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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help: remove the `async` keyword from this definition
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LL - async extern "gpu-kernel" fn async_kernel() {
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LL + extern "gpu-kernel" fn async_kernel() {
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error: requires `ResumeTy` lang_item
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--> $DIR/cannot-be-coroutine.rs:38:19
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LL | async fn vanilla(){
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| ___________________^
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LL | |
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LL | | }
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| |_^
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error: aborting due to 2 previous errors
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