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-rw-r--r--tests/codegen/vec-optimizes-away.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/codegen/vec-optimizes-away.rs b/tests/codegen/vec-optimizes-away.rs
index 77a94b0b429..39d5c1614c8 100644
--- a/tests/codegen/vec-optimizes-away.rs
+++ b/tests/codegen/vec-optimizes-away.rs
@@ -1,4 +1,4 @@
-//@ compile-flags: -O
+//@ compile-flags: -Copt-level=3
 #![crate_type = "lib"]
 
 #[no_mangle]