From b5b49289e1e67a1b333da3ba6cf374ca11b9d326 Mon Sep 17 00:00:00 2001
From: Ben Kimock <kimockb@gmail.com>
Date: Sun, 7 Apr 2024 16:46:21 -0400
Subject: [PATCH] Only traverse mono-reachable blocks in cg_clif

---
 compiler/rustc_codegen_cranelift/src/base.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_codegen_cranelift/src/base.rs b/compiler/rustc_codegen_cranelift/src/base.rs
index 1307a62a60d..771e5b21958 100644
--- a/compiler/rustc_codegen_cranelift/src/base.rs
+++ b/compiler/rustc_codegen_cranelift/src/base.rs
@@ -267,7 +267,7 @@ fn codegen_fn_body(fx: &mut FunctionCx<'_, '_, '_>, start_block: Block) {
         .generic_activity("codegen prelude")
         .run(|| crate::abi::codegen_fn_prelude(fx, start_block));
 
-    for (bb, bb_data) in fx.mir.basic_blocks.iter_enumerated() {
+    for (bb, bb_data) in traversal::mono_reachable(fx.mir, fx.tcx, fx.instance) {
         let block = fx.get_block(bb);
         fx.bcx.switch_to_block(block);