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Remove function Filler::isDelayFiller. Check if I is the same instruction that

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filled the last delay slot visited.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141151 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2011-10-05 01:30:09 +00:00
parent 6f818abbe3
commit 53120e0a9f
1 changed files with 7 additions and 11 deletions
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18
lib/Target/Mips/MipsDelaySlotFiller.cpp
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@ -41,6 +41,7 @@ namespace {
TargetMachine &TM;
const TargetInstrInfo *TII;
MachineBasicBlock::iterator LastFiller;
static char ID;
Filler(TargetMachine &tm)
@ -92,6 +93,8 @@ namespace {
bool Filler::
runOnMachineBasicBlock(MachineBasicBlock &MBB) {
bool Changed = false;
LastFiller = MBB.end();
for (MachineBasicBlock::iterator I = MBB.begin(); I != MBB.end(); ++I)
if (I->getDesc().hasDelaySlot()) {
++FilledSlots;
@ -106,7 +109,9 @@ runOnMachineBasicBlock(MachineBasicBlock &MBB) {
else
BuildMI(MBB, llvm::next(I), I->getDebugLoc(), TII->get(Mips::NOP));
++I; // Skip instruction that has just been moved to delay slot.
// Record the filler instruction that filled the delay slot.
// The instruction after it will be visited in the next iteration.
LastFiller = ++I;
}
return Changed;
@ -149,7 +154,7 @@ bool Filler::findDelayInstr(MachineBasicBlock &MBB,
if (I->hasUnmodeledSideEffects()
|| I->isInlineAsm()
|| I->isLabel()
|| isDelayFiller(MBB, I)
|| I == LastFiller
|| I->getDesc().isPseudo()
//
// Should not allow:
@ -264,12 +269,3 @@ bool Filler::IsRegInSet(SmallSet<unsigned, 32>& RegSet, unsigned Reg) {
return false;
}
// return true if the candidate is a delay filler.
bool Filler::isDelayFiller(MachineBasicBlock &MBB,
MachineBasicBlock::iterator candidate) {
if (candidate == MBB.begin())
return false;
const MCInstrDesc &prevdesc = (--candidate)->getDesc();
return prevdesc.hasDelaySlot();
}