diff --git a/lib/cretonne/src/context.rs b/lib/cretonne/src/context.rs
index 2441f19d02..5324248142 100644
--- a/lib/cretonne/src/context.rs
+++ b/lib/cretonne/src/context.rs
@@ -105,7 +105,9 @@ impl Context {
         }
         self.compute_domtree();
         self.eliminate_unreachable_code(isa)?;
-        self.dce(isa)?;
+        if isa.flags().opt_level() != OptLevel::Fastest {
+            self.dce(isa)?;
+        }
         self.regalloc(isa)?;
         self.prologue_epilogue(isa)?;
         self.relax_branches(isa)