Improve assertion text for missing live ranges.

2017-02-18 10:22:00 -08:00
parent 85fa68023c
commit a20afbefe0
1 changed files with 4 additions and 1 deletions
--- a/lib/cretonne/src/regalloc/live_value_tracker.rs
+++ b/lib/cretonne/src/regalloc/live_value_tracker.rs
@@ -229,7 +229,10 @@ impl LiveValueTracker {
        // Add the values defined by `inst`.
        let first_def = self.live.values.len();
        for value in dfg.inst_results(inst) {
-            let lr = liveness.get(value).expect("Instruction result has no live range");
+            let lr = match liveness.get(value) {
+                Some(lr) => lr,
+                None => panic!("{} result {} has no live range", dfg[inst].opcode(), value),
+            };
            assert_eq!(lr.def(), inst.into());
            match lr.def_local_end().into() {
                ExpandedProgramPoint::Inst(endpoint) => {