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Remove unnecessary gotos to fall-thru successors.

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llvm-svn: 85257
This commit is contained in:
Sanjiv Gupta 2009-10-27 17:40:24 +00:00
parent ec7abb4dd5
commit c690360ed5
2 changed files with 26 additions and 1 deletions
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22
lib/Target/PIC16/PIC16InstrInfo.cpp
View File

@ -214,3 +214,25 @@ InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
// returning NULL.
return 0;
}
bool PIC16InstrInfo::AnalyzeBranch(MachineBasicBlock &MBB,
MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
SmallVectorImpl<MachineOperand> &Cond,
bool AllowModify) const {
MachineBasicBlock::iterator I = MBB.end();
if (I == MBB.begin())
return true;
// Get the terminator instruction.
--I;
// Handle unconditional branches. If the unconditional branch's target is
// successor basic block then remove the unconditional branch.
if (I->getOpcode() == PIC16::br_uncond && AllowModify) {
if (MBB.isLayoutSuccessor(I->getOperand(0).getMBB())) {
TBB = 0;
I->eraseFromParent();
}
}
return true;
}

5
lib/Target/PIC16/PIC16InstrInfo.h
View File

@ -68,7 +68,10 @@ public:
unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
const SmallVectorImpl<MachineOperand> &Cond) const;
virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
MachineBasicBlock *&FBB,
SmallVectorImpl<MachineOperand> &Cond,
bool AllowModify) const;
};
} // namespace llvm