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Switch a number of loops in lib/CodeGen over to range-based for-loops, now that

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the MachineRegisterInfo iterators are compatible with it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204075 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2014-03-17 19:36:09 +00:00
parent 7ad87e4d3b
commit 92fca73d52
17 changed files with 88 additions and 143 deletions
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lib/CodeGen/PeepholeOptimizer.cpp
+6 -13
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@@ -187,10 +187,8 @@ optimizeExtInstr(MachineInstr *MI, MachineBasicBlock *MBB,
// The source has other uses. See if we can replace the other uses with use of
// the result of the extension.
SmallPtrSet<MachineBasicBlock*, 4> ReachedBBs;
for (MachineRegisterInfo::use_instr_nodbg_iterator
UI = MRI->use_instr_nodbg_begin(DstReg), UE = MRI->use_instr_nodbg_end();
UI != UE; ++UI)
ReachedBBs.insert(UI->getParent());
for (MachineInstr &UI : MRI->use_nodbg_instructions(DstReg))
ReachedBBs.insert(UI.getParent());
// Uses that are in the same BB of uses of the result of the instruction.
SmallVector<MachineOperand*, 8> Uses;
@@ -199,10 +197,7 @@ optimizeExtInstr(MachineInstr *MI, MachineBasicBlock *MBB,
SmallVector<MachineOperand*, 8> ExtendedUses;
bool ExtendLife = true;
for (MachineRegisterInfo::use_nodbg_iterator
UI = MRI->use_nodbg_begin(SrcReg), UE = MRI->use_nodbg_end();
UI != UE; ++UI) {
MachineOperand &UseMO = *UI;
for (MachineOperand &UseMO : MRI->use_nodbg_operands(SrcReg)) {
MachineInstr *UseMI = UseMO.getParent();
if (UseMI == MI)
continue;
@@ -270,11 +265,9 @@ optimizeExtInstr(MachineInstr *MI, MachineBasicBlock *MBB,
// Look for PHI uses of the extended result, we don't want to extend the
// liveness of a PHI input. It breaks all kinds of assumptions down
// stream. A PHI use is expected to be the kill of its source values.
for (MachineRegisterInfo::use_instr_nodbg_iterator
UI = MRI->use_instr_nodbg_begin(DstReg),
UE = MRI->use_instr_nodbg_end(); UI != UE; ++UI)
if (UI->isPHI())
PHIBBs.insert(UI->getParent());
for (MachineInstr &UI : MRI->use_nodbg_instructions(DstReg))
if (UI.isPHI())
PHIBBs.insert(UI.getParent());
const TargetRegisterClass *RC = MRI->getRegClass(SrcReg);
for (unsigned i = 0, e = Uses.size(); i != e; ++i) {