ISLE: finish porting imul lowering to ISLE

2021-11-05 15:41:24 -07:00
parent 30d206779e
commit b8494822dc
6 changed files with 265 additions and 205 deletions
--- a/cranelift/isle/isle/src/sema.rs
+++ b/cranelift/isle/isle/src/sema.rs
@@ -1289,7 +1289,13 @@ impl TermEnv {
            if let ast::Def::Rule(rule) = def {
                rule.expr.terms(&mut |pos, ident| {
                    let sym = tyenv.intern_mut(ident);
-                    let term = self.term_map[&sym];
+                    let term = match self.term_map.get(&sym) {
+                        None => {
+                            debug_assert!(!tyenv.errors.is_empty());
+                            return;
+                        }
+                        Some(t) => t,
+                    };
                    let term = &self.terms[term.index()];
                    if !term.has_constructor() {
                        tyenv.report_error(