Repro for the LLVM assertion

Author: scottmcm

tests/codegen/intrinsics/disjoint_bitor.rs

@@ -1,4 +1,4 @@
-//@ compile-flags: -C no-prepopulate-passes
+//@ compile-flags: -C no-prepopulate-passes -Z mir-opt-level=0
 
 #![crate_type = "lib"]
 #![feature(core_intrinsics)]
@@ -18,3 +18,13 @@ pub unsafe fn disjoint_bitor_unsigned(x: u64, y: u64) -> u64 {
     // CHECK: or disjoint i64 %x, %y
     disjoint_bitor(x, y)
 }
+
+// CHECK-LABEL: @disjoint_bitor_literal
+#[no_mangle]
+pub unsafe fn disjoint_bitor_literal() -> u8 {
+    // This is a separate check because even without any passes,
+    // LLVM will fold so it's not an instruction, which can assert in LLVM.
+
+    // CHECK: store i8 3
+    disjoint_bitor(1, 2)
+}