[llvm-commits] [llvm] r70754 - in /llvm/trunk/lib/Target/MSP430: MSP430InstrInfo.cpp MSP430InstrInfo.h

[Anton Korobeynikov]

Author: asl
Date: Sun May  3 08:15:22 2009
New Revision: 70754

URL: http://llvm.org/viewvc/llvm-project?rev=70754&view=rev
Log:
Add InsertBranch() hook for tail mergeing

Modified:
    llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.cpp
    llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.h

Modified: llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.cpp?rev=70754&r1=70753&r2=70754&view=diff

==============================================================================
--- llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.cpp Sun May  3 08:15:22 2009
@@ -149,3 +149,29 @@
 
   return true;
 }
+
+unsigned
+MSP430InstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+                              MachineBasicBlock *FBB,
+                            const SmallVectorImpl<MachineOperand> &Cond) const {
+  // FIXME this should probably have a DebugLoc operand
+  DebugLoc dl = DebugLoc::getUnknownLoc();
+
+  // Shouldn't be a fall through.
+  assert(TBB && "InsertBranch must not be told to insert a fallthrough");
+  assert((Cond.size() == 1 || Cond.size() == 0) &&
+         "MSP430 branch conditions have one component!");
+
+  if (Cond.empty()) {
+    // Unconditional branch?
+    assert(!FBB && "Unconditional branch with multiple successors!");
+    BuildMI(&MBB, dl, get(MSP430::JMP)).addMBB(TBB);
+    return 1;
+  }
+
+  // Conditional branch.
+  unsigned Count = 0;
+  assert(0 && "Implement conditional branches!");
+
+  return Count;
+}

Modified: llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.h?rev=70754&r1=70753&r2=70754&view=diff

==============================================================================
--- llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.h (original)
+++ llvm/trunk/lib/Target/MSP430/MSP430InstrInfo.h Sun May  3 08:15:22 2009
@@ -73,6 +73,10 @@
                                            MachineBasicBlock::iterator MI,
                                  const std::vector<CalleeSavedInfo> &CSI) const;
 
+  virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+                                MachineBasicBlock *FBB,
+                             const SmallVectorImpl<MachineOperand> &Cond) const;
+
 };
 
 }