diff --git a/clang/test/CodeGen/inline-asm-p-constraint.c b/clang/test/CodeGen/inline-asm-p-constraint.c
--- a/clang/test/CodeGen/inline-asm-p-constraint.c
+++ b/clang/test/CodeGen/inline-asm-p-constraint.c
@@ -4,3 +4,12 @@
   // CHECK:     call void asm sideeffect "prfm pldl1keep, ${0:a}\0A", "r"(ptr %0)
   // CHECK-NOT: call void asm sideeffect "prfm pldl1keep, ${0:a}\0A", "p"(ptr %0)
 }
+
+int *current_task;
+long x;
+void bar (void) {
+  asm ("":"=r"(x):"p"(&current_task));
+}
+// CHECK: %0 = call i64 asm "", "=r,r"(ptr @current_task) #[[ATTR:[0-9]+]]
+// FIXME: should be memory(read)
+// CHECK: attributes #[[ATTR]] = { nounwind memory(none) }