[GlobalISel] Get rid of the ifdefs in TargetLowering.

Introduce a new API used only by GlobalISel: CallLowering.
This API will contain target hooks dedicated to call lowering.

llvm-svn: 260922

1 files changed, 36 insertions, 0 deletions

diff --git a/llvm/lib/Target/AArch64/AArch64CallLowering.h b/llvm/lib/Target/AArch64/AArch64CallLowering.h
new file mode 100644
index 00000000000..449a237e913
--- /dev/null
+++ b/llvm/lib/Target/AArch64/AArch64CallLowering.h
@@ -0,0 +1,36 @@
+//===-- llvm/lib/Target/AArch64/AArch64CallLowering.h - Call lowering -----===//
+//
+//                     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_AARCH64_AARCH64CALLLOWERING
+#define LLVM_LIB_TARGET_AARCH64_AARCH64CALLLOWERING
+
+#include "llvm/CodeGen/GlobalISel/CallLowering.h"
+
+namespace llvm {
+
+class AArch64TargetLowering;
+  
+class AArch64CallLowering: public CallLowering {
+ public:
+  AArch64CallLowering(const AArch64TargetLowering &TLI);
+  
+  bool LowerReturn(MachineIRBuilder &MIRBuiler, const Value *Val,
+                   unsigned VReg) const override;
+  bool
+  LowerFormalArguments(MachineIRBuilder &MIRBuilder,
+                       const Function::ArgumentListType &Args,
+                       const SmallVectorImpl<unsigned> &VRegs) const override;
+};
+} // End of namespace llvm;
+#endif