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[MachineBasicBlock] Use the const_cast(this) trick to reduce duplication 

NFC.

llvm-svn: 240413
This commit is contained in:
Benjamin Kramer 2015-06-23 14:47:18 +00:00
parent 4daa9f1e10
commit 9c956b33d7
2 changed files with 6 additions and 27 deletions
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8
llvm/include/llvm/CodeGen/MachineBasicBlock.h
View File

@ -461,7 +461,9 @@ public:
/// instruction of this basic block. If a terminator does not exist,
/// it returns end()
iterator getFirstTerminator();
const_iterator getFirstTerminator() const;
const_iterator getFirstTerminator() const {
return const_cast<MachineBasicBlock *>(this)->getFirstTerminator();
}
/// getFirstInstrTerminator - Same getFirstTerminator but it ignores bundles
/// and return an instr_iterator instead.
@ -470,7 +472,9 @@ public:
/// getLastNonDebugInstr - returns an iterator to the last non-debug
/// instruction in the basic block, or end()
iterator getLastNonDebugInstr();
const_iterator getLastNonDebugInstr() const;
const_iterator getLastNonDebugInstr() const {
return const_cast<MachineBasicBlock *>(this)->getLastNonDebugInstr();
}
/// SplitCriticalEdge - Split the critical edge from this block to the
/// given successor block, and return the newly created block, or null

25
llvm/lib/CodeGen/MachineBasicBlock.cpp
View File

@ -171,16 +171,6 @@ MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() {
return I;
}
MachineBasicBlock::const_iterator
MachineBasicBlock::getFirstTerminator() const {
const_iterator B = begin(), E = end(), I = E;
while (I != B && ((--I)->isTerminator() || I->isDebugValue()))
; /*noop */
while (I != E && !I->isTerminator())
++I;
return I;
}
MachineBasicBlock::instr_iterator MachineBasicBlock::getFirstInstrTerminator() {
instr_iterator B = instr_begin(), E = instr_end(), I = E;
while (I != B && ((--I)->isTerminator() || I->isDebugValue()))
@ -204,21 +194,6 @@ MachineBasicBlock::iterator MachineBasicBlock::getLastNonDebugInstr() {
return end();
}
MachineBasicBlock::const_iterator
MachineBasicBlock::getLastNonDebugInstr() const {
// Skip over end-of-block dbg_value instructions.
const_instr_iterator B = instr_begin(), I = instr_end();
while (I != B) {
--I;
// Return instruction that starts a bundle.
if (I->isDebugValue() || I->isInsideBundle())
continue;
return I;
}
// The block is all debug values.
return end();
}
const MachineBasicBlock *MachineBasicBlock::getLandingPadSuccessor() const {
// A block with a landing pad successor only has one other successor.
if (succ_size() > 2)