[ARC] Add ARC backend.
Add the ARC backend as an experimental target to lib/Target.
Reviewed at: https://reviews.llvm.org/D36331
llvm-svn: 311667
diff --git a/llvm/lib/Target/ARC/ARCTargetMachine.cpp b/llvm/lib/Target/ARC/ARCTargetMachine.cpp
new file mode 100644
index 0000000..d2512c2
--- /dev/null
+++ b/llvm/lib/Target/ARC/ARCTargetMachine.cpp
@@ -0,0 +1,95 @@
+//===- ARCTargetMachine.cpp - Define TargetMachine for ARC ------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARCTargetMachine.h"
+#include "ARC.h"
+#include "ARCTargetTransformInfo.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+static Reloc::Model getRelocModel(Optional<Reloc::Model> RM) {
+ if (!RM.hasValue())
+ return Reloc::Static;
+ return *RM;
+}
+
+static CodeModel::Model getEffectiveCodeModel(Optional<CodeModel::Model> CM) {
+ if (CM)
+ return *CM;
+ return CodeModel::Small;
+}
+
+/// ARCTargetMachine ctor - Create an ILP32 architecture model
+ARCTargetMachine::ARCTargetMachine(const Target &T, const Triple &TT,
+ StringRef CPU, StringRef FS,
+ const TargetOptions &Options,
+ Optional<Reloc::Model> RM,
+ Optional<CodeModel::Model> CM,
+ CodeGenOpt::Level OL, bool JIT)
+ : LLVMTargetMachine(T,
+ "e-m:e-p:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-"
+ "f32:32:32-i64:32-f64:32-a:0:32-n32",
+ TT, CPU, FS, Options, getRelocModel(RM),
+ getEffectiveCodeModel(CM), OL),
+ TLOF(make_unique<TargetLoweringObjectFileELF>()),
+ Subtarget(TT, CPU, FS, *this) {
+ initAsmInfo();
+}
+
+ARCTargetMachine::~ARCTargetMachine() = default;
+
+namespace {
+
+/// ARC Code Generator Pass Configuration Options.
+class ARCPassConfig : public TargetPassConfig {
+public:
+ ARCPassConfig(ARCTargetMachine &TM, PassManagerBase &PM)
+ : TargetPassConfig(TM, PM) {}
+
+ ARCTargetMachine &getARCTargetMachine() const {
+ return getTM<ARCTargetMachine>();
+ }
+
+ bool addInstSelector() override;
+ void addPreEmitPass() override;
+ void addPreRegAlloc() override;
+};
+
+} // end anonymous namespace
+
+TargetPassConfig *ARCTargetMachine::createPassConfig(PassManagerBase &PM) {
+ return new ARCPassConfig(*this, PM);
+}
+
+bool ARCPassConfig::addInstSelector() {
+ addPass(createARCISelDag(getARCTargetMachine(), getOptLevel()));
+ return false;
+}
+
+void ARCPassConfig::addPreEmitPass() { addPass(createARCBranchFinalizePass()); }
+
+void ARCPassConfig::addPreRegAlloc() { addPass(createARCExpandPseudosPass()); }
+
+// Force static initialization.
+extern "C" void LLVMInitializeARCTarget() {
+ RegisterTargetMachine<ARCTargetMachine> X(getTheARCTarget());
+}
+
+TargetIRAnalysis ARCTargetMachine::getTargetIRAnalysis() {
+ return TargetIRAnalysis([this](const Function &F) {
+ return TargetTransformInfo(ARCTTIImpl(this, F));
+ });
+}