From d7f288502fcacfb261a03d12cdf2261d3425815a Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Tue, 17 Aug 2021 18:20:04 +0100
Subject: [PATCH] SelectionDAGBuilder::visitInlineAsm - don't dereference
 dyn_cast<> results.

dyn_cast<> can return nullptr if the cast is illegal, use cast<> instead which will assert that the cast is correct.

Fixes static analyser warning.
---
 llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 57fe970..eb27735 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -8708,7 +8708,7 @@ void SelectionDAGBuilder::visitInlineAsm(const CallBase &Call,
           MachineFunction &MF = DAG.getMachineFunction();
           MachineRegisterInfo &MRI = MF.getRegInfo();
           const TargetRegisterInfo &TRI = *MF.getSubtarget().getRegisterInfo();
-          RegisterSDNode *R = dyn_cast<RegisterSDNode>(AsmNodeOperands[CurOp+1]);
+          auto *R = cast<RegisterSDNode>(AsmNodeOperands[CurOp+1]);
           Register TiedReg = R->getReg();
           MVT RegVT = R->getSimpleValueType(0);
           const TargetRegisterClass *RC = TiedReg.isVirtual() ?
-- 
2.7.4