[llvm] [CodeGen] Notify LRE delegate before foldAsLoad erases UseMI (PR #226250)

[Sam Valladares via llvm-commits]

https://github.com/samvallad33 updated https://github.com/llvm/llvm-project/pull/226250

>From 078fdf1118cddc0d39beeaa3ccf48529a39f16e5 Mon Sep 17 00:00:00 2001
From: Sam Valladares <liverpool1.fan10 at gmail.com>
Date: Thu, 24 Sep 2026 10:54:34 -0700
Subject: [PATCH] [CodeGen] Notify LRE delegate before foldAsLoad erases UseMI

foldAsLoad was missing the LRE_WillEraseInstruction notify that
eliminateDeadDef already does before erase.

Fixes #222905

Assisted-by: Cursor
Signed-off-by: Sam Valladares <liverpool1.fan10 at gmail.com>
---
 llvm/lib/CodeGen/LiveRangeEdit.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/llvm/lib/CodeGen/LiveRangeEdit.cpp b/llvm/lib/CodeGen/LiveRangeEdit.cpp
index 1d6b835f16468..3d25e204743e8 100644
--- a/llvm/lib/CodeGen/LiveRangeEdit.cpp
+++ b/llvm/lib/CodeGen/LiveRangeEdit.cpp
@@ -161,6 +161,8 @@ bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
   // Update the call info.
   if (UseMI->shouldUpdateAdditionalCallInfo())
     UseMI->getMF()->moveAdditionalCallInfo(UseMI, FoldMI);
+  if (TheDelegate)
+    TheDelegate->LRE_WillEraseInstruction(UseMI);
   UseMI->eraseFromParent();
   DefMI->addRegisterDead(LI->reg(), nullptr);
   Dead.push_back(DefMI);