Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/lib/Target/BPF/BPFFrameLowering.h

@@ -0,0 +1,41 @@
+//===-- BPFFrameLowering.h - Define frame lowering for BPF -----*- C++ -*--===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements BPF-specific bits of TargetFrameLowering class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H
+#define LLVM_LIB_TARGET_BPF_BPFFRAMELOWERING_H
+
+#include "llvm/CodeGen/TargetFrameLowering.h"
+
+namespace llvm {
+class BPFSubtarget;
+
+class BPFFrameLowering : public TargetFrameLowering {
+public:
+  explicit BPFFrameLowering(const BPFSubtarget &sti)
+      : TargetFrameLowering(TargetFrameLowering::StackGrowsDown, 8, 0) {}
+
+  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+
+  bool hasFP(const MachineFunction &MF) const override;
+  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
+                            RegScavenger *RS) const override;
+
+  MachineBasicBlock::iterator
+  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
+                                MachineBasicBlock::iterator MI) const override {
+    return MBB.erase(MI);
+  }
+};
+}
+#endif