Make an assert message more verbose.

2018-05-29 14:11:07 -07:00
parent 7720a571fc
commit d8eaa19dda
1 changed files with 5 additions and 1 deletions
--- a/lib/codegen/src/regalloc/reload.rs
+++ b/lib/codegen/src/regalloc/reload.rs
@@ -283,7 +283,11 @@ impl<'a> Context<'a> {
                .expect("Extra results on non-call instruction");
            for (i, lv) in retvals.iter().enumerate() {
                let abi = self.cur.func.dfg.signatures[sig].returns[i];
-                debug_assert!(abi.location.is_reg());
+                debug_assert!(
+                    abi.location.is_reg(),
+                    "expected reg; got {:?}",
+                    abi.location
+                );
                if lv.affinity.is_stack() {
                    let reg = self.cur.func.dfg.replace_result(lv.value, abi.value_type);
                    self.liveness