From b3875ea71b2ad3737eb368590ac81432fa03428c Mon Sep 17 00:00:00 2001
From: Kyle Butt <kyle+llvm@iteratee.net>
Date: Fri, 17 Jun 2016 22:40:19 +0000
Subject: [PATCH] Codegen: [MBP] Add assert strings. NFC

llvm-svn: 273067
---
 llvm/lib/CodeGen/MachineBlockPlacement.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/CodeGen/MachineBlockPlacement.cpp b/llvm/lib/CodeGen/MachineBlockPlacement.cpp
index 332755d0ff4b..3d51d460fd94 100644
--- a/llvm/lib/CodeGen/MachineBlockPlacement.cpp
+++ b/llvm/lib/CodeGen/MachineBlockPlacement.cpp
@@ -846,8 +846,8 @@ void MachineBlockPlacement::buildChain(
     SmallVectorImpl<MachineBasicBlock *> &BlockWorkList,
     SmallVectorImpl<MachineBasicBlock *> &EHPadWorkList,
     const BlockFilterSet *BlockFilter) {
-  assert(BB);
-  assert(BlockToChain[BB] == &Chain);
+  assert(BB && "BB must not be null.\n");
+  assert(BlockToChain[BB] == &Chain && "BlockToChainMap mis-match.\n");
   MachineFunction::iterator PrevUnplacedBlockIt = F->begin();
 
   MachineBasicBlock *LoopHeaderBB = BB;