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-rw-r--r--tests/codegen/lib-optimizations/iter-sum.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/codegen/lib-optimizations/iter-sum.rs b/tests/codegen/lib-optimizations/iter-sum.rs
index ea8c916bfc1..a054ffffe74 100644
--- a/tests/codegen/lib-optimizations/iter-sum.rs
+++ b/tests/codegen/lib-optimizations/iter-sum.rs
@@ -1,4 +1,4 @@
-//@ compile-flags: -O
+//@ compile-flags: -Copt-level=3
 //@ only-x86_64 (vectorization varies between architectures)
 #![crate_type = "lib"]