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

diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp
index a777f52cb24240090d1e35453d3fd23f7c099236..1af00e84a6ed2ae62d53207bbeefde08c98441cf 100644 (file)
--- 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;
 }