Add InsertBranch() hook for tail mergeing
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70754 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/MSP430/MSP430InstrInfo.cpp b/lib/Target/MSP430/MSP430InstrInfo.cpp
index 199a323..39c835d 100644
--- a/lib/Target/MSP430/MSP430InstrInfo.cpp
+++ b/lib/Target/MSP430/MSP430InstrInfo.cpp
@@ -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;
+}
diff --git a/lib/Target/MSP430/MSP430InstrInfo.h b/lib/Target/MSP430/MSP430InstrInfo.h
index 59133d9..e07aaca 100644
--- a/lib/Target/MSP430/MSP430InstrInfo.h
+++ b/lib/Target/MSP430/MSP430InstrInfo.h
@@ -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;
+
};
}