commit b5cdaa257e167a08a8a54ea9249d847ccc415ce0
author Evan Cheng <evan.cheng@apple.com> Fri May 18 00:05:48 2007 +0000
committer Evan Cheng <evan.cheng@apple.com> Fri May 18 00:05:48 2007 +0000
tree eb8bcd2531e39b2725150f6001c1ed31ccfa07d8
parent f48ae4630bdf5c58dfca8f4d82a1ee1a88c3a767

RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37192 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCInstrInfo.cpp

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 89b5c9c..e861b2e 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -224,30 +224,32 @@
   return true;
 }
 
-void PPCInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
+unsigned PPCInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
   MachineBasicBlock::iterator I = MBB.end();
-  if (I == MBB.begin()) return;
+  if (I == MBB.begin()) return 0;
   --I;
   if (I->getOpcode() != PPC::B && I->getOpcode() != PPC::BCC)
-    return;
+    return 0;
   
   // Remove the branch.
   I->eraseFromParent();
   
   I = MBB.end();
 
-  if (I == MBB.begin()) return;
+  if (I == MBB.begin()) return 1;
   --I;
   if (I->getOpcode() != PPC::BCC)
-    return;
+    return 1;
   
   // Remove the branch.
   I->eraseFromParent();
+  return 2;
 }
 
-void PPCInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
-                                MachineBasicBlock *FBB,
-                                const std::vector<MachineOperand> &Cond) const {
+unsigned
+PPCInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+                           MachineBasicBlock *FBB,
+                           const std::vector<MachineOperand> &Cond) const {
   // Shouldn't be a fall through.
   assert(TBB && "InsertBranch must not be told to insert a fallthrough");
   assert((Cond.size() == 2 || Cond.size() == 0) && 
@@ -260,13 +262,14 @@
     else                // Conditional branch
       BuildMI(&MBB, get(PPC::BCC))
         .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
-    return;
+    return 1;
   }
   
   // Two-way Conditional Branch.
   BuildMI(&MBB, get(PPC::BCC))
     .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
   BuildMI(&MBB, get(PPC::B)).addMBB(FBB);
+  return 2;
 }
 
 bool PPCInstrInfo::BlockHasNoFallThrough(MachineBasicBlock &MBB) const {

lib/Target/PowerPC/PPCInstrInfo.h

diff --git a/lib/Target/PowerPC/PPCInstrInfo.h b/lib/Target/PowerPC/PPCInstrInfo.h
index 9005963..498a8e5 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.h
+++ b/lib/Target/PowerPC/PPCInstrInfo.h
@@ -99,10 +99,10 @@
   virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
                              MachineBasicBlock *&FBB,
                              std::vector<MachineOperand> &Cond) const;
-  virtual void RemoveBranch(MachineBasicBlock &MBB) const;
-  virtual void InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
-                            MachineBasicBlock *FBB,
-                            const std::vector<MachineOperand> &Cond) const;
+  virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
+  virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+                                MachineBasicBlock *FBB,
+                                const std::vector<MachineOperand> &Cond) const;
   virtual bool BlockHasNoFallThrough(MachineBasicBlock &MBB) const;
   virtual bool ReverseBranchCondition(std::vector<MachineOperand> &Cond) const;
 };