[llvm] [GlobalOpt] Use cast instead of dyn_cast. NFC (PR #144634)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/144634

The dyn_cast was not checked for null, and the cast is guaranteed to succeed by an earlier check.

>From c8bbff8c0b6d990511c7bd65293b5dc0976b62a4 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Tue, 17 Jun 2025 21:54:38 -0700
Subject: [PATCH] [GlobalOpt] Use cast instead of dyn_cast. NFC

The dyn_cast was not checked for null, and the cast is guaranteed
to succeed by an earlier check.
---
 llvm/lib/Transforms/IPO/GlobalOpt.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/Transforms/IPO/GlobalOpt.cpp b/llvm/lib/Transforms/IPO/GlobalOpt.cpp
index 7db0586386506..4a06e0fa619c0 100644
--- a/llvm/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/llvm/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2169,7 +2169,7 @@ static bool tryWidenGlobalArraysUsedByMemcpy(
 
     unsigned NumBytesToCopy = BytesToCopyOp->getZExtValue();
 
-    auto *Alloca = dyn_cast<AllocaInst>(CI->getArgOperand(0));
+    auto *Alloca = cast<AllocaInst>(CI->getArgOperand(0));
     uint64_t DZSize = Alloca->getAllocatedType()->getArrayNumElements();
     uint64_t SZSize = SourceDataArray->getType()->getNumElements();
     unsigned ElementByteWidth = SourceDataArray->getElementByteSize();