3 files changed, 49 insertions, 0 deletions
diff --git a/tests/ui/asm/conditionally-sized-ptr-fail.rs b/tests/ui/asm/conditionally-sized-ptr-fail.rs
new file mode 100644
index 00000000000..b0a93495ffa
--- /dev/null
+++ b/tests/ui/asm/conditionally-sized-ptr-fail.rs
@@ -0,0 +1,19 @@
+//@ needs-asm-support
+
+use std::arch::asm;
+
+fn _f<T: ?Sized>(p: *mut T) {
+    unsafe {
+        asm!("/* {} */", in(reg) p);
+        //~^ ERROR cannot use value of unsized pointer type `*mut T` for inline assembly
+    }
+}
+
+fn _g(p: *mut [u8]) {
+    unsafe {
+        asm!("/* {} */", in(reg) p);
+        //~^ ERROR cannot use value of unsized pointer type `*mut [u8]` for inline assembly
+    }
+}
+
+fn main() {}
diff --git a/tests/ui/asm/conditionally-sized-ptr-fail.stderr b/tests/ui/asm/conditionally-sized-ptr-fail.stderr
new file mode 100644
index 00000000000..b88f59f569c
--- /dev/null
+++ b/tests/ui/asm/conditionally-sized-ptr-fail.stderr
@@ -0,0 +1,18 @@
+error: cannot use value of unsized pointer type `*mut T` for inline assembly
+  --> $DIR/conditionally-sized-ptr-fail.rs:7:34
+   |
+LL |         asm!("/* {} */", in(reg) p);
+   |                                  ^
+   |
+   = note: only sized pointers can be used in inline assembly
+
+error: cannot use value of unsized pointer type `*mut [u8]` for inline assembly
+  --> $DIR/conditionally-sized-ptr-fail.rs:14:34
+   |
+LL |         asm!("/* {} */", in(reg) p);
+   |                                  ^
+   |
+   = note: only sized pointers can be used in inline assembly
+
+error: aborting due to 2 previous errors
+
diff --git a/tests/ui/asm/conditionally-sized-ptr.rs b/tests/ui/asm/conditionally-sized-ptr.rs
new file mode 100644
index 00000000000..8ff18fd1da1
--- /dev/null
+++ b/tests/ui/asm/conditionally-sized-ptr.rs
@@ -0,0 +1,12 @@
+//@ check-pass
+//@ needs-asm-support
+
+use std::arch::asm;
+
+fn _f<T>(p: *mut T) {
+    unsafe {
+        asm!("/* {} */", in(reg) p);
+    }
+}
+
+fn main() {}