#include <algorithm>
-#define DEBUG_TYPE "x86-pad-short-functions"
#include "X86.h"
#include "X86InstrInfo.h"
+#include "X86Subtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
using namespace llvm;
+#define DEBUG_TYPE "x86-pad-short-functions"
+
STATISTIC(NumBBsPadded, "Number of basic blocks padded");
namespace {
struct PadShortFunc : public MachineFunctionPass {
static char ID;
PadShortFunc() : MachineFunctionPass(ID)
- , Threshold(4), TM(0), TII(0) {}
+ , Threshold(4), TM(nullptr), TII(nullptr) {}
- virtual bool runOnMachineFunction(MachineFunction &MF);
+ bool runOnMachineFunction(MachineFunction &MF) override;
- virtual const char *getPassName() const {
+ const char *getPassName() const override {
return "X86 Atom pad short functions";
}
}
TM = &MF.getTarget();
- TII = TM->getInstrInfo();
+ if (!TM->getSubtarget<X86Subtarget>().padShortFunctions())
+ return false;
+
+ TII = TM->getSubtargetImpl()->getInstrInfo();
// Search through basic blocks and mark the ones that have early returns
ReturnBBs.clear();
return true;
}
- CyclesToEnd += TII->getInstrLatency(TM->getInstrItineraryData(), MI);
+ CyclesToEnd += TII->getInstrLatency(
+ TM->getSubtargetImpl()->getInstrItineraryData(), MI);
}
VisitedBBs[MBB] = VisitedBBInfo(false, CyclesToEnd);