From 508b803c44e4df10fe189e8d1ae3a551ade9b2da Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tomasz=20Mi=C4=85sko?= <tomasz.miasko@gmail.com>
Date: Wed, 5 Mar 2025 23:36:47 +0100
Subject: [PATCH] Remove start block special case

Edges to the start block are invalid. The special case is unnecessary.
---
 compiler/rustc_mir_transform/src/add_call_guards.rs | 1 -
 1 file changed, 1 deletion(-)

diff --git a/compiler/rustc_mir_transform/src/add_call_guards.rs b/compiler/rustc_mir_transform/src/add_call_guards.rs
index 55694cacd92e..f9e757dda431 100644
--- a/compiler/rustc_mir_transform/src/add_call_guards.rs
+++ b/compiler/rustc_mir_transform/src/add_call_guards.rs
@@ -34,7 +34,6 @@ impl<'tcx> crate::MirPass<'tcx> for AddCallGuards {
     fn run_pass(&self, _tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
         let mut pred_count: IndexVec<_, _> =
             body.basic_blocks.predecessors().iter().map(|ps| ps.len()).collect();
-        pred_count[START_BLOCK] += 1;
 
         // We need a place to store the new blocks generated
         let mut new_blocks = Vec::new();