From c32c65ae8392c5fe755731e7baf2b38fa89fbda3 Mon Sep 17 00:00:00 2001
From: Ben Kimock <kimockb@gmail.com>
Date: Wed, 11 Jan 2023 00:03:04 -0500
Subject: [PATCH] Add a duplicate SimplifyCfg pass

---
 compiler/rustc_mir_transform/src/lib.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/rustc_mir_transform/src/lib.rs b/compiler/rustc_mir_transform/src/lib.rs
index 16b8a901f3651..10ac6904e0e7a 100644
--- a/compiler/rustc_mir_transform/src/lib.rs
+++ b/compiler/rustc_mir_transform/src/lib.rs
@@ -577,6 +577,7 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
             &o1(simplify::SimplifyCfg::new("final")),
             &nrvo::RenameReturnPlace,
             &simplify::SimplifyLocals::new("final"),
+            &o1(simplify::SimplifyCfg::new("final")),
             &multiple_return_terminators::MultipleReturnTerminators,
             &deduplicate_blocks::DeduplicateBlocks,
             // Some cleanup necessary at least for LLVM and potentially other codegen backends.