Add new llvm-backend-test crate.

lib/llvm-backend-tests/tests/compile.rs

@@ -0,0 +1,22 @@
+use wasmer_llvm_backend_tests::{get_compiler, wat2wasm};
+use wasmer_runtime::imports;
+use wasmer_runtime_core::compile_with;
+
+#[test]
+fn crash_return_with_float_on_stack() {
+    const MODULE: &str = r#"
+(module
+  (type (;0;) (func))
+  (type (;1;) (func (param f64) (result f64)))
+  (func $_start (type 0))
+  (func $fmod (type 1) (param f64) (result f64)
+    local.get 0
+    f64.const 0x0p+0 (;=0;)
+    f64.mul
+    return)
+)
+"#;
+    let wasm_binary = wat2wasm(MODULE.as_bytes()).expect("WAST not valid or malformed");
+    let module = compile_with(&wasm_binary, &get_compiler()).unwrap();
+    let instance = module.instantiate(&imports! {}).unwrap();
+}