summaryrefslogtreecommitdiffstats
path: root/contrib/llvm/lib/Target/ARM/ARMHazardRecognizer.h
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/llvm/lib/Target/ARM/ARMHazardRecognizer.h')
-rw-r--r--contrib/llvm/lib/Target/ARM/ARMHazardRecognizer.h56
1 files changed, 56 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/ARM/ARMHazardRecognizer.h b/contrib/llvm/lib/Target/ARM/ARMHazardRecognizer.h
new file mode 100644
index 0000000..98bfc4c
--- /dev/null
+++ b/contrib/llvm/lib/Target/ARM/ARMHazardRecognizer.h
@@ -0,0 +1,56 @@
+//===-- ARMHazardRecognizer.h - ARM Hazard Recognizers ----------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines hazard recognizers for scheduling ARM functions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ARMHAZARDRECOGNIZER_H
+#define ARMHAZARDRECOGNIZER_H
+
+#include "llvm/CodeGen/ScoreboardHazardRecognizer.h"
+
+namespace llvm {
+
+class ARMBaseInstrInfo;
+class ARMBaseRegisterInfo;
+class ARMSubtarget;
+class MachineInstr;
+
+/// ARMHazardRecognizer handles special constraints that are not expressed in
+/// the scheduling itinerary. This is only used during postRA scheduling. The
+/// ARM preRA scheduler uses an unspecialized instance of the
+/// ScoreboardHazardRecognizer.
+class ARMHazardRecognizer : public ScoreboardHazardRecognizer {
+ const ARMBaseInstrInfo &TII;
+ const ARMBaseRegisterInfo &TRI;
+ const ARMSubtarget &STI;
+
+ MachineInstr *LastMI;
+ unsigned FpMLxStalls;
+
+public:
+ ARMHazardRecognizer(const InstrItineraryData *ItinData,
+ const ARMBaseInstrInfo &tii,
+ const ARMBaseRegisterInfo &tri,
+ const ARMSubtarget &sti,
+ const ScheduleDAG *DAG) :
+ ScoreboardHazardRecognizer(ItinData, DAG, "post-RA-sched"), TII(tii),
+ TRI(tri), STI(sti), LastMI(0) {}
+
+ virtual HazardType getHazardType(SUnit *SU, int Stalls);
+ virtual void Reset();
+ virtual void EmitInstruction(SUnit *SU);
+ virtual void AdvanceCycle();
+ virtual void RecedeCycle();
+};
+
+} // end namespace llvm
+
+#endif // ARMHAZARDRECOGNIZER_H
OpenPOWER on IntegriCloud