FileCheck mutable_variable_no_prop.

Author: cjgillot

tests/mir-opt/const_prop/mutable_variable_no_prop.rs

@@ -1,10 +1,17 @@
-// skip-filecheck
 // unit-test: ConstProp
 
+// Verify that we do not propagate the contents of this mutable static.
 static mut STATIC: u32 = 0x42424242;
 
 // EMIT_MIR mutable_variable_no_prop.main.ConstProp.diff
 fn main() {
+    // CHECK-LABEL: fn main(
+    // CHECK: debug x => [[x:_.*]];
+    // CHECK: debug y => [[y:_.*]];
+    // CHECK: [[x]] = const 42_u32;
+    // CHECK: [[tmp:_.*]] = (*{{_.*}});
+    // CHECK: [[x]] = move [[tmp]];
+    // CHECK: [[y]] = [[x]];
     let mut x = 42;
     unsafe {
         x = STATIC;