switch to pallet_revive runtime (#40)

Signed-off-by: xermicus <cyrill@parity.io>

crates/runtime-api/src/polkavm_exports.rs

@@ -0,0 +1,29 @@
+use inkwell::{context::Context, memory_buffer::MemoryBuffer, module::Module, support::LLVMString};
+
+include!(concat!(env!("OUT_DIR"), "/polkavm_exports.rs"));
+
+/// Creates a LLVM module from the [BITCODE].
+/// The module exports `call` and `deploy` functions (which are named thereafter).
+/// Returns `Error` if the bitcode fails to parse, which should never happen.
+pub fn module<'context>(
+    context: &'context Context,
+    module_name: &str,
+) -> Result<Module<'context>, LLVMString> {
+    let buf = MemoryBuffer::create_from_memory_range(BITCODE, module_name);
+    Module::parse_bitcode_from_buffer(&buf, context)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::polkavm_exports;
+
+    #[test]
+    fn it_works() {
+        inkwell::targets::Target::initialize_riscv(&Default::default());
+        let context = inkwell::context::Context::create();
+        let module = polkavm_exports::module(&context, "polkavm_exports").unwrap();
+
+        assert!(module.get_function("call").is_some());
+        assert!(module.get_function("deploy").is_some());
+    }
+}