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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:13 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:19:13 +0000
commit218caa410aa38c29984be31a5229b9fa717560ee (patch)
treec54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/codegen/avr
parentReleasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff)
downloadrustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz
rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/codegen/avr')
-rw-r--r--tests/codegen/avr/avr-func-addrspace.rs111
1 files changed, 111 insertions, 0 deletions
diff --git a/tests/codegen/avr/avr-func-addrspace.rs b/tests/codegen/avr/avr-func-addrspace.rs
new file mode 100644
index 000000000..e9740e30d
--- /dev/null
+++ b/tests/codegen/avr/avr-func-addrspace.rs
@@ -0,0 +1,111 @@
+// compile-flags: -O --target=avr-unknown-gnu-atmega328 --crate-type=rlib
+// needs-llvm-components: avr
+
+// This test validates that function pointers can be stored in global variables
+// and called upon. It ensures that Rust emits function pointers in the correct
+// address space to LLVM so that an assertion error relating to casting is
+// not triggered.
+//
+// It also validates that functions can be called through function pointers
+// through traits.
+
+#![feature(no_core, lang_items, intrinsics, unboxed_closures, arbitrary_self_types)]
+#![crate_type = "lib"]
+#![no_core]
+
+#[lang = "sized"]
+pub trait Sized { }
+#[lang = "copy"]
+pub trait Copy { }
+#[lang = "receiver"]
+pub trait Receiver { }
+#[lang = "tuple_trait"]
+pub trait Tuple { }
+
+pub struct Result<T, E> { _a: T, _b: E }
+
+impl Copy for usize {}
+impl Copy for &usize {}
+
+#[lang = "drop_in_place"]
+pub unsafe fn drop_in_place<T: ?Sized>(_: *mut T) {}
+
+#[lang = "fn_once"]
+pub trait FnOnce<Args: Tuple> {
+ #[lang = "fn_once_output"]
+ type Output;
+
+ extern "rust-call" fn call_once(self, args: Args) -> Self::Output;
+}
+
+#[lang = "fn_mut"]
+pub trait FnMut<Args: Tuple> : FnOnce<Args> {
+ extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output;
+}
+
+#[lang = "fn"]
+pub trait Fn<Args: Tuple>: FnOnce<Args> {
+ /// Performs the call operation.
+ extern "rust-call" fn call(&self, args: Args) -> Self::Output;
+}
+
+extern "rust-intrinsic" {
+ pub fn transmute<Src, Dst>(src: Src) -> Dst;
+}
+
+pub static mut STORAGE_FOO: fn(&usize, &mut u32) -> Result<(), ()> = arbitrary_black_box;
+pub static mut STORAGE_BAR: u32 = 12;
+
+fn arbitrary_black_box(ptr: &usize, _: &mut u32) -> Result<(), ()> {
+ let raw_ptr = ptr as *const usize;
+ let _v: usize = unsafe { *raw_ptr };
+ loop {}
+}
+
+#[inline(never)]
+#[no_mangle]
+fn call_through_fn_trait(a: &mut impl Fn<(), Output=()>) {
+ (*a)()
+}
+
+#[inline(never)]
+fn update_bar_value() {
+ unsafe {
+ STORAGE_BAR = 88;
+ }
+}
+
+// CHECK: define dso_local void @test(){{.+}}addrspace(1)
+#[no_mangle]
+pub extern "C" fn test() {
+ let mut buf = 7;
+
+ // A call through the Fn trait must use address space 1.
+ //
+ // CHECK: call{{.+}}addrspace(1) void @call_through_fn_trait()
+ call_through_fn_trait(&mut update_bar_value);
+
+ // A call through a global variable must use address space 1.
+ // CHECK: load {{.*}}addrspace(1){{.+}}FOO
+ unsafe {
+ STORAGE_FOO(&1, &mut buf);
+ }
+}
+
+// Validate that we can codegen transmutes between data ptrs and fn ptrs.
+
+// CHECK: define{{.+}}{{void \(\) addrspace\(1\)\*|ptr addrspace\(1\)}} @transmute_data_ptr_to_fn({{\{\}\*|ptr}}{{.*}} %x)
+#[no_mangle]
+pub unsafe fn transmute_data_ptr_to_fn(x: *const ()) -> fn() {
+ // It doesn't matter precisely how this is codegenned (through memory or an addrspacecast),
+ // as long as it doesn't cause a verifier error by using `bitcast`.
+ transmute(x)
+}
+
+// CHECK: define{{.+}}{{\{\}\*|ptr}} @transmute_fn_ptr_to_data({{void \(\) addrspace\(1\)\*|ptr addrspace\(1\)}}{{.*}} %x)
+#[no_mangle]
+pub unsafe fn transmute_fn_ptr_to_data(x: fn()) -> *const () {
+ // It doesn't matter precisely how this is codegenned (through memory or an addrspacecast),
+ // as long as it doesn't cause a verifier error by using `bitcast`.
+ transmute(x)
+}