Codegen: [MBP] Add assert strings. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273067 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/MachineBlockPlacement.cpp b/lib/CodeGen/MachineBlockPlacement.cpp
index 332755d0ff4b47cb074eafd8f1ca502193db105c..3d51d460fd940af8b0a8e9f8ea0f04e4e9e5a352 100644 (file)
--- a/lib/CodeGen/MachineBlockPlacement.cpp
+++ b/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;