From 0b64400e0b3de18c99f77380e98da8e5e1a49832 Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Wed, 15 Jan 2020 11:51:55 +0000
Subject: [PATCH] RegisterClassInfo::computePSetLimit - assert that we actually
 find a register.

Fixes "pointer is null" clang static analyzer warning.
---
 llvm/lib/CodeGen/RegisterClassInfo.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/llvm/lib/CodeGen/RegisterClassInfo.cpp b/llvm/lib/CodeGen/RegisterClassInfo.cpp
index bdfb2ba..1523bd4 100644
--- 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) -
-- 
2.7.4