1 files changed, 48 insertions, 0 deletions
diff --git a/src/test/assembly/align_offset.rs b/src/test/assembly/align_offset.rs
new file mode 100644
index 000000000..c5eefca34
--- /dev/null
+++ b/src/test/assembly/align_offset.rs
@@ -0,0 +1,48 @@
+// assembly-output: emit-asm
+// compile-flags: -Copt-level=1
+// only-x86_64
+// min-llvm-version: 14.0
+#![crate_type="rlib"]
+
+// CHECK-LABEL: align_offset_byte_ptr
+// CHECK: leaq 31
+// CHECK: andq $-32
+// CHECK: subq
+#[no_mangle]
+pub fn align_offset_byte_ptr(ptr: *const u8) -> usize {
+    ptr.align_offset(32)
+}
+
+// CHECK-LABEL: align_offset_byte_slice
+// CHECK: leaq 31
+// CHECK: andq $-32
+// CHECK: subq
+#[no_mangle]
+pub fn align_offset_byte_slice(slice: &[u8]) -> usize {
+    slice.as_ptr().align_offset(32)
+}
+
+// CHECK-LABEL: align_offset_word_ptr
+// CHECK: leaq 31
+// CHECK: andq $-32
+// CHECK: subq
+// CHECK: shrq
+// This `ptr` is not known to be aligned, so it is required to check if it is at all possible to
+// align. LLVM applies a simple mask.
+// CHECK: orq
+#[no_mangle]
+pub fn align_offset_word_ptr(ptr: *const u32) -> usize {
+    ptr.align_offset(32)
+}
+
+// CHECK-LABEL: align_offset_word_slice
+// CHECK: leaq 31
+// CHECK: andq $-32
+// CHECK: subq
+// CHECK: shrq
+// `slice` is known to be aligned, so `!0` is not possible as a return
+// CHECK-NOT: orq
+#[no_mangle]
+pub fn align_offset_word_slice(slice: &[u32]) -> usize {
+    slice.as_ptr().align_offset(32)
+}