From fadae872fabd317020eeefbb118d8e07e5e43994 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Mi=C4=85sko?= <tomasz.miasko@gmail.com>
Date: Sun, 3 Jul 2022 00:00:00 +0000
Subject: [PATCH] Use extend instead of repeatedly pushing into a vec

---
 compiler/rustc_mir_transform/src/simplify.rs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/compiler/rustc_mir_transform/src/simplify.rs b/compiler/rustc_mir_transform/src/simplify.rs
index 980af9843628..ec0eebe5611e 100644
--- a/compiler/rustc_mir_transform/src/simplify.rs
+++ b/compiler/rustc_mir_transform/src/simplify.rs
@@ -352,15 +352,15 @@ fn save_unreachable_coverage(
     }
 
     let start_block = &mut basic_blocks[START_BLOCK];
-    for (source_info, code_region) in dropped_coverage {
-        start_block.statements.push(Statement {
+    start_block.statements.extend(dropped_coverage.into_iter().map(
+        |(source_info, code_region)| Statement {
             source_info,
             kind: StatementKind::Coverage(Box::new(Coverage {
                 kind: CoverageKind::Unreachable,
                 code_region: Some(code_region),
             })),
-        })
-    }
+        },
+    ));
 }
 
 pub struct SimplifyLocals;