//
//===----------------------------------------------------------------------===//
-#include "llvm/Target/TargetSubtargetInfo.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/ADT/SmallVector.h"
+#include "llvm/Target/TargetSubtargetInfo.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::enablePostRAScheduler(
CodeGenOpt::Level OptLevel,
AntiDepBreakMode& Mode,
return false;
}
+bool TargetSubtargetInfo::useAA() const {
+ return false;
+}