fixup! tests: Adopt ABI transmute tests from crashtests

Author: workingjubilee

tests/auxiliary/minicore.rs

@@ -16,6 +16,7 @@
 
 #![feature(
     no_core,
+    intrinsics,
     lang_items,
     auto_traits,
     freeze_impls,
@@ -190,3 +191,9 @@ impl<'a, 'b: 'a, T: ?Sized + Unsize<U>, U: ?Sized> CoerceUnsized<&'a U> for &'b
 trait Drop {
     fn drop(&mut self);
 }
+
+pub mod mem {
+    #[rustc_nounwind]
+    #[rustc_intrinsic]
+    pub unsafe fn transmute<Src, Dst>(src: Src) -> Dst;
+}

tests/ui/abi/unsupported-abi-transmute.rs

@@ -1,7 +1,15 @@
-#![feature(abi_gpu_kernel)]
+//@ add-core-stubs
+//@ compile-flags: --crate-type=lib --target x86_64-unknown-none
+//@ needs-llvm-components: x86
+//@ edition: 2018
+#![no_core]
+#![feature(no_core, lang_items)]
+extern crate minicore;
+use minicore::*;
+
 // Check we error before unsupported ABIs reach codegen stages.
 
-fn main() {
-    let a = unsafe { core::mem::transmute::<usize, extern "gpu-kernel" fn(i32)>(4) }(2);
-    //~^ ERROR E0570
+fn anything() {
+    let a = unsafe { mem::transmute::<usize, extern "thiscall" fn(i32)>(4) }(2);
+    //~^ ERROR: is not a supported ABI for the current target [E0570]
 }

tests/ui/abi/unsupported-abi-transmute.stderr

@@ -1,8 +1,8 @@
-error[E0570]: `"gpu-kernel"` is not a supported ABI for the current target
-  --> $DIR/unsupported-abi-transmute.rs:5:59
+error[E0570]: `"thiscall"` is not a supported ABI for the current target
+  --> $DIR/unsupported-abi-transmute.rs:12:53
    |
-LL |     let a = unsafe { core::mem::transmute::<usize, extern "gpu-kernel" fn(i32)>(4) }(2);
-   |                                                           ^^^^^^^^^^^^
+LL |     let a = unsafe { mem::transmute::<usize, extern "thiscall" fn(i32)>(4) }(2);
+   |                                                     ^^^^^^^^^^
 
 error: aborting due to 1 previous error