RegisterClassInfo::computePSetLimit - assert that we actually find a register.

Fixes "pointer is null" clang static analyzer warning.

diff --git a/llvm/lib/CodeGen/RegisterClassInfo.cpp b/llvm/lib/CodeGen/RegisterClassInfo.cpp
index bdfb2ba..1523bd4 100644 (file)
--- a/llvm/lib/CodeGen/RegisterClassInfo.cpp
+++ b/llvm/lib/CodeGen/RegisterClassInfo.cpp
@@ -186,6 +186,7 @@ unsigned RegisterClassInfo::computePSetLimit(unsigned Idx) const {
       NumRCUnits = NUnits;
     }
   }
+  assert(RC && "Failed to find register class");
   compute(RC);
   unsigned NReserved = RC->getNumRegs() - getNumAllocatableRegs(RC);
   return TRI->getRegPressureSetLimit(*MF, Idx) -