Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/lib/Target/X86/X86CallLowering.h

@@ -0,0 +1,54 @@
+//===- llvm/lib/Target/X86/X86CallLowering.h - Call lowering ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// This file describes how to lower LLVM calls to machine code calls.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
+#define LLVM_LIB_TARGET_X86_X86CALLLOWERING_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/CodeGen/GlobalISel/CallLowering.h"
+#include <functional>
+
+namespace llvm {
+
+class DataLayout;
+class MachineRegisterInfo;
+class X86TargetLowering;
+
+class X86CallLowering : public CallLowering {
+public:
+  X86CallLowering(const X86TargetLowering &TLI);
+
+  bool lowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
+                   unsigned VReg) const override;
+
+  bool lowerFormalArguments(MachineIRBuilder &MIRBuilder, const Function &F,
+                            ArrayRef<unsigned> VRegs) const override;
+
+  bool lowerCall(MachineIRBuilder &MIRBuilder, CallingConv::ID CallConv,
+                 const MachineOperand &Callee, const ArgInfo &OrigRet,
+                 ArrayRef<ArgInfo> OrigArgs) const override;
+
+private:
+  /// A function of this type is used to perform value split action.
+  using SplitArgTy = std::function<void(ArrayRef<unsigned>)>;
+
+  bool splitToValueTypes(const ArgInfo &OrigArgInfo,
+                         SmallVectorImpl<ArgInfo> &SplitArgs,
+                         const DataLayout &DL, MachineRegisterInfo &MRI,
+                         SplitArgTy SplitArg) const;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_LIB_TARGET_X86_X86CALLLOWERING_H