[CodeGen] Separate MBB metadata from instructions in -debug printing

Add an empty line after 'liveins:', 'successors:', or '; predecessors:',
the one that ends up to be the last one.

llvm-svn: 325258

1 files changed, 9 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp
index fca93d82d00..ef9154f6edb 100644
--- a/llvm/lib/CodeGen/MachineBasicBlock.cpp
+++ b/llvm/lib/CodeGen/MachineBasicBlock.cpp
@@ -325,6 +325,7 @@ void MachineBasicBlock::print(raw_ostream &OS, ModuleSlotTracker &MST,
   const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
   const MachineRegisterInfo &MRI = MF->getRegInfo();
   const TargetInstrInfo &TII = *getParent()->getSubtarget().getInstrInfo();
+  bool HasLineAttributes = false;
 
   // Print the preds of this block according to the CFG.
   if (!pred_empty()) {
@@ -337,6 +338,7 @@ void MachineBasicBlock::print(raw_ostream &OS, ModuleSlotTracker &MST,
       OS << printMBBReference(**I);
     }
     OS << '\n';
+    HasLineAttributes = true;
   }
 
   if (!succ_empty()) {
@@ -366,8 +368,10 @@ void MachineBasicBlock::print(raw_ostream &OS, ModuleSlotTracker &MST,
                          100.0)
            << ')';
       }
-      OS << '\n';
     }
+
+    OS << '\n';
+    HasLineAttributes = true;
   }
 
   if (!livein_empty() && MRI.tracksLiveness()) {
@@ -384,8 +388,12 @@ void MachineBasicBlock::print(raw_ostream &OS, ModuleSlotTracker &MST,
         OS << ":0x" << PrintLaneMask(LI.LaneMask);
     }
     OS << '\n';
+    HasLineAttributes = true;
   }
 
+  if (HasLineAttributes)
+    OS << '\n';
+
   bool IsInBundle = false;
   for (const MachineInstr &MI : instrs()) {
     if (Indexes) {