1 files changed, 81 insertions, 0 deletions
diff --git a/llvm/lib/Target/VE/VEFrameLowering.h b/llvm/lib/Target/VE/VEFrameLowering.h
new file mode 100644
index 000000000000..97e31d21aa43
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+++ b/llvm/lib/Target/VE/VEFrameLowering.h
@@ -0,0 +1,81 @@
+//===-- VEFrameLowering.h - Define frame lowering for VE --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This class implements VE-specific bits of TargetFrameLowering class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H
+#define LLVM_LIB_TARGET_VE_VEFRAMELOWERING_H
+
+#include "VE.h"
+#include "llvm/CodeGen/TargetFrameLowering.h"
+
+namespace llvm {
+
+class VESubtarget;
+class VEFrameLowering : public TargetFrameLowering {
+public:
+  explicit VEFrameLowering(const VESubtarget &ST);
+
+  /// emitProlog/emitEpilog - These methods insert prolog and epilog code into
+  /// the function.
+  void emitPrologue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+  void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const override;
+  void emitPrologueInsns(MachineFunction &MF, MachineBasicBlock &MBB,
+                         MachineBasicBlock::iterator MBBI, int NumBytes,
+                         bool RequireFPUpdate) const;
+  void emitEpilogueInsns(MachineFunction &MF, MachineBasicBlock &MBB,
+                         MachineBasicBlock::iterator MBBI, int NumBytes,
+                         bool RequireFPUpdate) const;
+
+  MachineBasicBlock::iterator
+  eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
+                                MachineBasicBlock::iterator I) const override;
+
+  bool hasReservedCallFrame(const MachineFunction &MF) const override;
+  bool hasFP(const MachineFunction &MF) const override;
+  void determineCalleeSaves(MachineFunction &MF, BitVector &SavedRegs,
+                            RegScavenger *RS = nullptr) const override;
+
+  int getFrameIndexReference(const MachineFunction &MF, int FI,
+                             unsigned &FrameReg) const override;
+
+  const SpillSlot *
+  getCalleeSavedSpillSlots(unsigned &NumEntries) const override {
+    static const SpillSlot Offsets[] = {
+        {VE::SX17, 40},  {VE::SX18, 48},  {VE::SX19, 56},  {VE::SX20, 64},
+        {VE::SX21, 72},  {VE::SX22, 80},  {VE::SX23, 88},  {VE::SX24, 96},
+        {VE::SX25, 104}, {VE::SX26, 112}, {VE::SX27, 120}, {VE::SX28, 128},
+        {VE::SX29, 136}, {VE::SX30, 144}, {VE::SX31, 152}, {VE::SX32, 160},
+        {VE::SX33, 168}};
+    NumEntries = array_lengthof(Offsets);
+    return Offsets;
+  }
+
+  /// targetHandlesStackFrameRounding - Returns true if the target is
+  /// responsible for rounding up the stack frame (probably at emitPrologue
+  /// time).
+  bool targetHandlesStackFrameRounding() const override { return true; }
+
+private:
+  // Returns true if MF is a leaf procedure.
+  bool isLeafProc(MachineFunction &MF) const;
+
+  // Emits code for adjusting SP in function prologue/epilogue.
+  void emitSPAdjustment(MachineFunction &MF, MachineBasicBlock &MBB,
+                        MachineBasicBlock::iterator MBBI, int NumBytes) const;
+
+  // Emits code for extending SP in function prologue/epilogue.
+  void emitSPExtend(MachineFunction &MF, MachineBasicBlock &MBB,
+                    MachineBasicBlock::iterator MBBI, int NumBytes) const;
+};
+
+} // namespace llvm
+
+#endif