[llvm] [Xtensa] Initial codegen support from IR (PR #78548)

[Andrei Safronov via llvm-commits]

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@@ -0,0 +1,56 @@
+//===-- XtensaRegisterInfo.h - Xtensa Register Information Impl -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// 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 file contains the Xtensa implementation of the TargetRegisterInfo class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_XTENSA_XTENSAREGISTERINFO_H
+#define LLVM_LIB_TARGET_XTENSA_XTENSAREGISTERINFO_H
+
+#include "Xtensa.h"
+#include "llvm/CodeGen/TargetRegisterInfo.h"
+
+#define GET_REGINFO_HEADER
+#include "XtensaGenRegisterInfo.inc"
+
+namespace llvm {
+class TargetRegisterClass;
+class XtensaInstrInfo;
+class XtensaSubtarget;
+
+struct XtensaRegisterInfo : public XtensaGenRegisterInfo {
+public:
+  const XtensaSubtarget &Subtarget;
+
+  XtensaRegisterInfo(const XtensaSubtarget &STI);
+
+  bool requiresRegisterScavenging(const MachineFunction &MF) const override {
+    return true;
+  }
+
+  bool requiresFrameIndexScavenging(const MachineFunction &MF) const override {
+    return true;
+  }
+
+  const uint16_t *
+  getCalleeSavedRegs(const MachineFunction *MF = 0) const override;
+  const uint32_t *getCallPreservedMask(const MachineFunction &MF,
+                                       CallingConv::ID) const override;
+  BitVector getReservedRegs(const MachineFunction &MF) const override;
+  bool eliminateFrameIndex(MachineBasicBlock::iterator MI, int SPAdj,
+                           unsigned FIOperandNum,
+                           RegScavenger *RS = nullptr) const override;
+  Register getFrameRegister(const MachineFunction &MF) const override;
+};
+
+} // end namespace llvm
+
+#endif /* LLVM_LIB_TARGET_XTENSA_REGISTERINFO_H */
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andreisfr wrote:

Fixed

https://github.com/llvm/llvm-project/pull/78548