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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37192 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-05-18 00:05:48 +00:00
parent f48ae4630b
commit b5cdaa257e
7 changed files with 43 additions and 32 deletions
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lib/Target/PowerPC/PPCInstrInfo.cpp
+12 -9
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@@ -224,30 +224,32 @@ bool PPCInstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,MachineBasicBlock *&TBB,
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 @@ void PPCInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
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 {