From e8a3cc68782cc5d43d7b8e24c4afa94448905349 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Wed, 13 Mar 2013 18:11:17 +0000
Subject: Check register classes also when changing them.

We have the same assertion in createVirtualRegister.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176959 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineRegisterInfo.cpp | 1 +
 1 file changed, 1 insertion(+)

(limited to 'lib/CodeGen/MachineRegisterInfo.cpp')

diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp
index a777f52cb2..1af00e84a6 100644
--- a/lib/CodeGen/MachineRegisterInfo.cpp
+++ b/lib/CodeGen/MachineRegisterInfo.cpp
@@ -37,6 +37,7 @@ MachineRegisterInfo::~MachineRegisterInfo() {
 ///
 void
 MachineRegisterInfo::setRegClass(unsigned Reg, const TargetRegisterClass *RC) {
+  assert(RC && RC->isAllocatable() && "Invalid RC for virtual register");
   VRegInfo[Reg].first = RC;
 }
 
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