diff options
Diffstat (limited to 'lib/Target/MBlaze/MBlazeDelaySlotFiller.cpp')
-rw-r--r-- | lib/Target/MBlaze/MBlazeDelaySlotFiller.cpp | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/lib/Target/MBlaze/MBlazeDelaySlotFiller.cpp b/lib/Target/MBlaze/MBlazeDelaySlotFiller.cpp index c07570a487b9..19e787d8622d 100644 --- a/lib/Target/MBlaze/MBlazeDelaySlotFiller.cpp +++ b/lib/Target/MBlaze/MBlazeDelaySlotFiller.cpp @@ -29,13 +29,11 @@ using namespace llvm; STATISTIC(FilledSlots, "Number of delay slots filled"); -namespace llvm { -cl::opt<bool> DisableDelaySlotFiller( +static cl::opt<bool> MBDisableDelaySlotFiller( "disable-mblaze-delay-filler", cl::init(false), cl::desc("Disable the MBlaze delay slot filter."), cl::Hidden); -} namespace { struct Filler : public MachineFunctionPass { @@ -109,7 +107,6 @@ static bool delayHasHazard(MachineBasicBlock::iterator &candidate, // Hazard check MachineBasicBlock::iterator a = candidate; MachineBasicBlock::iterator b = slot; - MCInstrDesc desc = candidate->getDesc(); // MBB layout:- // candidate := a0 = operation(a1, a2) @@ -123,7 +120,7 @@ static bool delayHasHazard(MachineBasicBlock::iterator &candidate, // 4. b0 is one or more of {a1, a2} // 5. a accesses memory, and the middle bit // contains a store operation. - bool a_is_memory = desc.mayLoad() || desc.mayStore(); + bool a_is_memory = candidate->mayLoad() || candidate->mayStore(); // Determine the number of operands in the slot instruction and in the // candidate instruction. @@ -156,7 +153,7 @@ static bool delayHasHazard(MachineBasicBlock::iterator &candidate, } // Check hazard type 5 - if (a_is_memory && m->getDesc().mayStore()) + if (a_is_memory && m->mayStore()) return true; } @@ -183,8 +180,8 @@ static bool isDelayFiller(MachineBasicBlock &MBB, if (candidate == MBB.begin()) return false; - MCInstrDesc brdesc = (--candidate)->getDesc(); - return (brdesc.hasDelaySlot()); + --candidate; + return (candidate->hasDelaySlot()); } static bool hasUnknownSideEffects(MachineBasicBlock::iterator &I) { @@ -211,9 +208,8 @@ findDelayInstr(MachineBasicBlock &MBB,MachineBasicBlock::iterator slot) { break; --I; - MCInstrDesc desc = I->getDesc(); - if (desc.hasDelaySlot() || desc.isBranch() || isDelayFiller(MBB,I) || - desc.isCall() || desc.isReturn() || desc.isBarrier() || + if (I->hasDelaySlot() || I->isBranch() || isDelayFiller(MBB,I) || + I->isCall() || I->isReturn() || I->isBarrier() || hasUnknownSideEffects(I)) break; @@ -232,11 +228,11 @@ findDelayInstr(MachineBasicBlock &MBB,MachineBasicBlock::iterator slot) { bool Filler::runOnMachineBasicBlock(MachineBasicBlock &MBB) { bool Changed = false; for (MachineBasicBlock::iterator I = MBB.begin(); I != MBB.end(); ++I) - if (I->getDesc().hasDelaySlot()) { + if (I->hasDelaySlot()) { MachineBasicBlock::iterator D = MBB.end(); MachineBasicBlock::iterator J = I; - if (!DisableDelaySlotFiller) + if (!MBDisableDelaySlotFiller) D = findDelayInstr(MBB,I); ++FilledSlots; |