Hexagon backend support

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146412 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 128 insertions, 0 deletions

diff --git a/lib/Target/Hexagon/HexagonTargetMachine.cpp b/lib/Target/Hexagon/HexagonTargetMachine.cpp
new file mode 100644
index 0000000000..09b7dd51a6
--- /dev/null
+++ b/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -0,0 +1,128 @@
+//===-- HexagonTargetMachine.cpp - Define TargetMachine for Hexagon -------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//
+//===----------------------------------------------------------------------===//
+
+#include "HexagonMCAsmInfo.h"
+#include "HexagonTargetMachine.h"
+#include "Hexagon.h"
+#include "HexagonISelLowering.h"
+#include "llvm/Module.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/PassManager.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Support/TargetRegistry.h"
+#include <iostream>
+
+#define GET_REGINFO_MC_DESC
+#define GET_REGINFO_TARGET_DESC
+#include "HexagonGenRegisterInfo.inc"
+
+extern "C" void LLVMInitializeHexagonTargetMC() {}
+
+using namespace llvm;
+
+static cl::
+opt<bool> DisableHardwareLoops(
+                        "disable-hexagon-hwloops", cl::Hidden,
+                        cl::desc("Disable Hardware Loops for Hexagon target"));
+
+/// HexagonTargetMachineModule - Note that this is used on hosts that
+/// cannot link in a library unless there are references into the
+/// library.  In particular, it seems that it is not possible to get
+/// things to work on Win32 without this.  Though it is unused, do not
+/// remove it.
+extern "C" int HexagonTargetMachineModule;
+int HexagonTargetMachineModule = 0;
+
+extern "C" void LLVMInitializeHexagonTarget() {
+  // Register the target.
+  RegisterTargetMachine<HexagonTargetMachine> X(TheHexagonTarget);
+
+  // Register the target asm info.
+  RegisterMCAsmInfo<HexagonMCAsmInfo> A(TheHexagonTarget);
+}
+
+
+/// HexagonTargetMachine ctor - Create an ILP32 architecture model.
+///
+
+/// Hexagon_TODO: Do I need an aggregate alignment?
+///
+HexagonTargetMachine::HexagonTargetMachine(const Target &T, StringRef TT,
+                                           StringRef CPU, StringRef FS,
+                                           TargetOptions Options,
+                                           Reloc::Model RM,
+                                           CodeModel::Model CM,
+                                           CodeGenOpt::Level OL)
+  : LLVMTargetMachine(T, TT, CPU, FS, Options, RM, CM, OL),
+    DataLayout("e-p:32:32:32-i64:64:64-i32:32:32-i16:16:16-i1:32:32-a0:0") ,
+    Subtarget(TT, CPU, FS), TLInfo(*this), InstrInfo(Subtarget),
+    TSInfo(*this),
+    FrameLowering(Subtarget),
+    InstrItins(&Subtarget.getInstrItineraryData()) {
+  setMCUseCFI(false);
+}
+
+// addPassesForOptimizations - Allow the backend (target) to add Target
+// Independent Optimization passes to the Pass Manager.
+bool HexagonTargetMachine::addPassesForOptimizations(PassManagerBase &PM) {
+
+  PM.add(createConstantPropagationPass());
+  PM.add(createLoopSimplifyPass());
+  PM.add(createDeadCodeEliminationPass());
+  PM.add(createConstantPropagationPass());
+  PM.add(createLoopUnrollPass());
+  PM.add(createLoopStrengthReducePass(getTargetLowering()));
+  return true;
+}
+
+bool HexagonTargetMachine::addInstSelector(PassManagerBase &PM) {
+  PM.add(createHexagonRemoveExtendOps(*this));
+  PM.add(createHexagonISelDag(*this));
+  return false;
+}
+
+
+bool HexagonTargetMachine::addPreRegAlloc(PassManagerBase &PM) {
+  if (!DisableHardwareLoops) {
+    PM.add(createHexagonHardwareLoops());
+  }
+
+  return false;
+}
+
+bool HexagonTargetMachine::addPostRegAlloc(PassManagerBase &PM) {
+  PM.add(createHexagonCFGOptimizer(*this));
+  return true;
+}
+
+
+bool HexagonTargetMachine::addPreSched2(PassManagerBase &PM) {
+  PM.add(createIfConverterPass());
+  return true;
+}
+
+bool HexagonTargetMachine::addPreEmitPass(PassManagerBase &PM) {
+
+  if (!DisableHardwareLoops) {
+    PM.add(createHexagonFixupHwLoops());
+  }
+
+  // Expand Spill code for predicate registers.
+  PM.add(createHexagonExpandPredSpillCode(*this));
+
+  // Split up TFRcondsets into conditional transfers.
+  PM.add(createHexagonSplitTFRCondSets(*this));
+
+  return false;
+}