test and fix some more targets

compiler/rustc_target/src/abi/call/csky.rs

@@ -7,6 +7,10 @@
 use crate::abi::call::{ArgAbi, FnAbi, Reg, Uniform};
 
 fn classify_ret<Ty>(arg: &mut ArgAbi<'_, Ty>) {
+    if !arg.layout.is_sized() {
+        // Not touching this...
+        return;
+    }
     // For return type, aggregate which <= 2*XLen will be returned in registers.
     // Otherwise, aggregate will be returned indirectly.
     if arg.layout.is_aggregate() {
@@ -24,6 +28,10 @@ fn classify_ret<Ty>(arg: &mut ArgAbi<'_, Ty>) {
 }
 
 fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) {
+    if !arg.layout.is_sized() {
+        // Not touching this...
+        return;
+    }
     // For argument type, the first 4*XLen parts of aggregate will be passed
     // in registers, and the rest will be passed in stack.
     // So we can coerce to integers directly and let backend handle it correctly.

compiler/rustc_target/src/abi/call/m68k.rs

@@ -9,6 +9,10 @@ fn classify_ret<Ty>(ret: &mut ArgAbi<'_, Ty>) {
 }
 
 fn classify_arg<Ty>(arg: &mut ArgAbi<'_, Ty>) {
+    if !arg.layout.is_sized() {
+        // Not touching this...
+        return;
+    }
     if arg.layout.is_aggregate() {
         arg.make_indirect_byval(None);
     } else {

tests/ui/abi/compatibility.rs

@@ -46,6 +46,15 @@
 // revisions: wasi
 //[wasi] compile-flags: --target wasm32-wasi
 //[wasi] needs-llvm-components: webassembly
+// revisions: csky
+//[csky] compile-flags: --target csky-unknown-linux-gnuabiv2
+//[csky] needs-llvm-components: csky
+// revisions: bpf
+//[bpf] compile-flags: --target bpfeb-unknown-none
+//[bpf] needs-llvm-components: bpf
+// revisions: m68k
+//[m68k] compile-flags: --target m68k-unknown-linux-gnu
+//[m68k] needs-llvm-components: m68k
 // FIXME: disabled on nvptx64 since the target ABI fails the sanity check
 // see https://github.com/rust-lang/rust/issues/117480
 /* revisions: nvptx64