ARM64: initial backend import

This adds a second implementation of the AArch64 architecture to LLVM,
accessible in parallel via the "arm64" triple. The plan over the
coming weeks & months is to merge the two into a single backend,
during which time thorough code review should naturally occur.

Everything will be easier with the target in-tree though, hence this
commit.

llvm-svn: 205090

1 files changed, 48 insertions, 0 deletions

diff --git a/llvm/lib/Target/ARM64/ARM64.h b/llvm/lib/Target/ARM64/ARM64.h
new file mode 100644
index 00000000000..f2c5e609986
--- /dev/null
+++ b/llvm/lib/Target/ARM64/ARM64.h
@@ -0,0 +1,48 @@
+//===-- ARM64.h - Top-level interface for ARM64 representation --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains the entry points for global functions defined in the LLVM
+// ARM64 back-end.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TARGET_ARM64_H
+#define TARGET_ARM64_H
+
+#include "MCTargetDesc/ARM64BaseInfo.h"
+#include "MCTargetDesc/ARM64MCTargetDesc.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/DataTypes.h"
+
+namespace llvm {
+
+class ARM64TargetMachine;
+class FunctionPass;
+class MachineFunctionPass;
+
+FunctionPass *createARM64DeadRegisterDefinitions();
+FunctionPass *createARM64ConditionalCompares();
+FunctionPass *createARM64AdvSIMDScalar();
+FunctionPass *createARM64BranchRelaxation();
+FunctionPass *createARM64ISelDag(ARM64TargetMachine &TM,
+                                 CodeGenOpt::Level OptLevel);
+FunctionPass *createARM64StorePairSuppressPass();
+FunctionPass *createARM64ExpandPseudoPass();
+FunctionPass *createARM64LoadStoreOptimizationPass();
+ModulePass *createARM64PromoteConstantPass();
+FunctionPass *createARM64AddressTypePromotionPass();
+/// \brief Creates an ARM-specific Target Transformation Info pass.
+ImmutablePass *createARM64TargetTransformInfoPass(const ARM64TargetMachine *TM);
+
+FunctionPass *createARM64CleanupLocalDynamicTLSPass();
+
+FunctionPass *createARM64CollectLOHPass();
+} // end namespace llvm
+
+#endif