// Temporarily disable experimental passes.
const TargetSubtargetInfo &ST = TM->getSubtarget<TargetSubtargetInfo>();
- if (!ST.enableMachineScheduler())
+ if (!ST.useMachineScheduler())
disablePass(&MachineSchedulerID);
}
const TargetSubtargetInfo &ST = TM->getSubtarget<TargetSubtargetInfo>();
if (EnableGlobalCopies == cl::BOU_UNSET)
- JoinGlobalCopies = ST.enableMachineScheduler();
+ JoinGlobalCopies = ST.useMachineScheduler();
else
JoinGlobalCopies = (EnableGlobalCopies == cl::BOU_TRUE);
const TargetLowering *TLI = IS->getTargetLowering();
const TargetSubtargetInfo &ST = IS->TM.getSubtarget<TargetSubtargetInfo>();
- if (OptLevel == CodeGenOpt::None || ST.enableMachineScheduler() ||
+ if (OptLevel == CodeGenOpt::None || ST.useMachineScheduler() ||
TLI->getSchedulingPreference() == Sched::Source)
return createSourceListDAGScheduler(IS, OptLevel);
if (TLI->getSchedulingPreference() == Sched::RegPressure)
//
//===----------------------------------------------------------------------===//
+#include "llvm/Support/CommandLine.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/ADT/SmallVector.h"
using namespace llvm;
TargetSubtargetInfo::~TargetSubtargetInfo() {}
+// Temporary option to compare overall performance change when moving from the
+// SD scheduler to the MachineScheduler pass pipeline. It should be removed
+// before 3.4. The normal way to enable/disable the MachineScheduling pass
+// itself is by using -enable-misched. For targets that already use MI sched
+// (via MySubTarget::enableMachineScheduler()) -misched-bench=false negates the
+// subtarget hook.
+static cl::opt<bool> BenchMachineSched("misched-bench", cl::Hidden,
+ cl::desc("Migrate from the target's default SD scheduler to MI scheduler"));
+
+bool TargetSubtargetInfo::useMachineScheduler() const {
+ if (BenchMachineSched.getNumOccurrences())
+ return BenchMachineSched;
+ return enableMachineScheduler();
+}
+
bool TargetSubtargetInfo::enableMachineScheduler() const {
return false;
}
bool TargetSubtargetInfo::useAA() const {
return false;
}
-