commit 99be49dd9b3685399f85fc9e46ad010dc8c84887
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 5613ee5bff98de4d286b8ca33bccd438e79816ce
parent c0dc382fb79da0dac1a2405204e08f4da0e16504

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

llvm-svn: 37192

llvm/lib/Target/Alpha/AlphaInstrInfo.cpp

diff --git a/llvm/lib/Target/Alpha/AlphaInstrInfo.cpp b/llvm/lib/Target/Alpha/AlphaInstrInfo.cpp
index 04b08b5..2a72d18 100644
--- a/llvm/lib/Target/Alpha/AlphaInstrInfo.cpp
+++ b/llvm/lib/Target/Alpha/AlphaInstrInfo.cpp
@@ -99,7 +99,7 @@
   }
 }
 
-void AlphaInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
+unsigned AlphaInstrInfo::InsertBranch(MachineBasicBlock &MBB,MachineBasicBlock *TBB,
                                   MachineBasicBlock *FBB,
                                   const std::vector<MachineOperand> &Cond)const{
   assert(TBB && "InsertBranch must not be told to insert a fallthrough");
@@ -117,7 +117,7 @@
       else
         BuildMI(&MBB, get(Alpha::COND_BRANCH_F))
           .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
-    return;
+    return 1;
   }
   
   // Two-way Conditional Branch.
@@ -128,6 +128,7 @@
     BuildMI(&MBB, get(Alpha::COND_BRANCH_F))
       .addImm(Cond[0].getImm()).addReg(Cond[1].getReg()).addMBB(TBB);
   BuildMI(&MBB, get(Alpha::BR)).addMBB(FBB);
+  return 2;
 }
 
 static unsigned AlphaRevCondCode(unsigned Opcode) {
@@ -203,28 +204,29 @@
   return true;
 }
 
-void AlphaInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
+unsigned AlphaInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const {
   MachineBasicBlock::iterator I = MBB.end();
-  if (I == MBB.begin()) return;
+  if (I == MBB.begin()) return 0;
   --I;
   if (I->getOpcode() != Alpha::BR && 
       I->getOpcode() != Alpha::COND_BRANCH_I &&
       I->getOpcode() != Alpha::COND_BRANCH_F)
-    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() != Alpha::COND_BRANCH_I && 
       I->getOpcode() != Alpha::COND_BRANCH_F)
-    return;
+    return 1;
   
   // Remove the branch.
   I->eraseFromParent();
+  return 2;
 }
 
 void AlphaInstrInfo::insertNoop(MachineBasicBlock &MBB, 

llvm/lib/Target/Alpha/AlphaInstrInfo.h

diff --git a/llvm/lib/Target/Alpha/AlphaInstrInfo.h b/llvm/lib/Target/Alpha/AlphaInstrInfo.h
index f5f55d9..84009be 100644
--- a/llvm/lib/Target/Alpha/AlphaInstrInfo.h
+++ b/llvm/lib/Target/Alpha/AlphaInstrInfo.h
@@ -39,13 +39,13 @@
   virtual unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
   virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
   
-  virtual void InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
+  virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
                             MachineBasicBlock *FBB,
                             const std::vector<MachineOperand> &Cond) const;
   bool AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
                      MachineBasicBlock *&FBB,
                      std::vector<MachineOperand> &Cond) const;
-  void RemoveBranch(MachineBasicBlock &MBB) const;
+  unsigned RemoveBranch(MachineBasicBlock &MBB) const;
   void insertNoop(MachineBasicBlock &MBB, 
                   MachineBasicBlock::iterator MI) const;
   bool BlockHasNoFallThrough(MachineBasicBlock &MBB) const;