diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp
index 4410fb7ecd23..b2114c250ac0 100644
--- a/llvm/lib/CodeGen/MachineBasicBlock.cpp
+++ b/llvm/lib/CodeGen/MachineBasicBlock.cpp
@@ -1137,7 +1137,6 @@ MachineBasicBlock *MachineBasicBlock::SplitCriticalEdge(
 
   MachineFunction *MF = getParent();
   MachineBasicBlock *PrevFallthrough = getNextNode();
-  DebugLoc DL;  // FIXME: this is nowhere
 
   MachineBasicBlock *NMBB = MF->CreateMachineBasicBlock();
   NMBB->setCallFrameSize(Succ->getCallFrameSize());
@@ -1218,6 +1217,15 @@ MachineBasicBlock *MachineBasicBlock::SplitCriticalEdge(
     SlotIndexUpdateDelegate SlotUpdater(*MF, Indexes);
     SmallVector<MachineOperand, 4> Cond;
     const TargetInstrInfo *TII = getParent()->getSubtarget().getInstrInfo();
+
+    // In original 'this' BB, there must be a branch instruction targeting at
+    // Succ. We can not find it out since currently getBranchDestBlock was not
+    // implemented for all targets. However, if the merged DL has column or line
+    // number, the scope and non-zero column and line number is same with that
+    // branch instruction so we can safely use it.
+    DebugLoc DL, MergedDL = findBranchDebugLoc();
+    if (MergedDL && (MergedDL.getLine() || MergedDL.getCol()))
+      DL = MergedDL;
     TII->insertBranch(*NMBB, Succ, nullptr, Cond, DL);
   }
 
diff --git a/llvm/test/CodeGen/X86/fsafdo_test1.ll b/llvm/test/CodeGen/X86/fsafdo_test1.ll
index b5ae3915294c..61c0f59aba6f 100644
--- a/llvm/test/CodeGen/X86/fsafdo_test1.ll
+++ b/llvm/test/CodeGen/X86/fsafdo_test1.ll
@@ -6,7 +6,7 @@
 ; V01: .loc    1 9 5 is_stmt 1 discriminator 2 # foo.c:9:5
 ; V0: .loc    1 9 5 is_stmt 0 discriminator 11266 # foo.c:9:5
 ; V0: .loc    1 7 3 is_stmt 1 discriminator 11266 # foo.c:7:3
-; V1: .loc    1 9 5 is_stmt 0 discriminator 258 # foo.c:9:5
+; V1: .loc    1 9 5 is_stmt 0 discriminator 514 # foo.c:9:5
 ; V1: .loc    1 7 3 is_stmt 1 discriminator 258 # foo.c:7:3
 ; Check that variable __llvm_fs_discriminator__ is generated.
 ; V01: .type   __llvm_fs_discriminator__,@object # @__llvm_fs_discriminator__