[llvm] r176959 - Check register classes also when changing them.

[Jakob Stoklund Olesen]

Author: stoklund
Date: Wed Mar 13 13:11:17 2013
New Revision: 176959

URL: http://llvm.org/viewvc/llvm-project?rev=176959&view=rev
Log:
Check register classes also when changing them.

We have the same assertion in createVirtualRegister.

Modified:
    llvm/trunk/lib/CodeGen/MachineRegisterInfo.cpp

Modified: llvm/trunk/lib/CodeGen/MachineRegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineRegisterInfo.cpp?rev=176959&r1=176958&r2=176959&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineRegisterInfo.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineRegisterInfo.cpp Wed Mar 13 13:11:17 2013
@@ -37,6 +37,7 @@ MachineRegisterInfo::~MachineRegisterInf
 ///
 void
 MachineRegisterInfo::setRegClass(unsigned Reg, const TargetRegisterClass *RC) {
+  assert(RC && RC->isAllocatable() && "Invalid RC for virtual register");
   VRegInfo[Reg].first = RC;
 }