1 files changed, 133 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/CSKY/CSKYTargetMachine.cpp b/contrib/llvm-project/llvm/lib/Target/CSKY/CSKYTargetMachine.cpp
new file mode 100644
index 000000000000..c5a57f32e29a
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Target/CSKY/CSKYTargetMachine.cpp
@@ -0,0 +1,133 @@
+//===--- CSKYTargetMachine.cpp - Define TargetMachine for CSKY ------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements the info about CSKY target spec.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CSKYTargetMachine.h"
+#include "CSKY.h"
+#include "CSKYMachineFunctionInfo.h"
+#include "CSKYSubtarget.h"
+#include "CSKYTargetObjectFile.h"
+#include "TargetInfo/CSKYTargetInfo.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+#include "llvm/MC/TargetRegistry.h"
+#include <optional>
+
+using namespace llvm;
+
+extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeCSKYTarget() {
+  RegisterTargetMachine<CSKYTargetMachine> X(getTheCSKYTarget());
+
+  PassRegistry *Registry = PassRegistry::getPassRegistry();
+  initializeCSKYConstantIslandsPass(*Registry);
+  initializeCSKYDAGToDAGISelPass(*Registry);
+}
+
+static std::string computeDataLayout(const Triple &TT) {
+  std::string Ret;
+
+  // Only support little endian for now.
+  // TODO: Add support for big endian.
+  Ret += "e";
+
+  // CSKY is always 32-bit target with the CSKYv2 ABI as prefer now.
+  // It's a 4-byte aligned stack with ELF mangling only.
+  Ret += "-m:e-S32-p:32:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:32:32"
+         "-v128:32:32-a:0:32-Fi32-n32";
+
+  return Ret;
+}
+
+CSKYTargetMachine::CSKYTargetMachine(const Target &T, const Triple &TT,
+                                     StringRef CPU, StringRef FS,
+                                     const TargetOptions &Options,
+                                     std::optional<Reloc::Model> RM,
+                                     std::optional<CodeModel::Model> CM,
+                                     CodeGenOpt::Level OL, bool JIT)
+    : LLVMTargetMachine(T, computeDataLayout(TT), TT, CPU, FS, Options,
+                        RM.value_or(Reloc::Static),
+                        getEffectiveCodeModel(CM, CodeModel::Small), OL),
+      TLOF(std::make_unique<CSKYELFTargetObjectFile>()) {
+  initAsmInfo();
+}
+
+const CSKYSubtarget *
+CSKYTargetMachine::getSubtargetImpl(const Function &F) const {
+  Attribute CPUAttr = F.getFnAttribute("target-cpu");
+  Attribute TuneAttr = F.getFnAttribute("tune-cpu");
+  Attribute FSAttr = F.getFnAttribute("target-features");
+
+  std::string CPU =
+      CPUAttr.isValid() ? CPUAttr.getValueAsString().str() : TargetCPU;
+  std::string TuneCPU =
+      TuneAttr.isValid() ? TuneAttr.getValueAsString().str() : CPU;
+  std::string FS =
+      FSAttr.isValid() ? FSAttr.getValueAsString().str() : TargetFS;
+
+  std::string Key = CPU + TuneCPU + FS;
+  auto &I = SubtargetMap[Key];
+  if (!I) {
+    // This needs to be done before we create a new subtarget since any
+    // creation will depend on the TM and the code generation flags on the
+    // function that reside in TargetOptions.
+    resetTargetOptions(F);
+    I = std::make_unique<CSKYSubtarget>(TargetTriple, CPU, TuneCPU, FS, *this);
+    if (I->useHardFloat() && !I->hasAnyFloatExt())
+      errs() << "Hard-float can't be used with current CPU,"
+                " set to Soft-float\n";
+  }
+  return I.get();
+}
+
+MachineFunctionInfo *CSKYTargetMachine::createMachineFunctionInfo(
+    BumpPtrAllocator &Allocator, const Function &F,
+    const TargetSubtargetInfo *STI) const {
+  return CSKYMachineFunctionInfo::create<CSKYMachineFunctionInfo>(Allocator, F,
+                                                                  STI);
+}
+
+namespace {
+class CSKYPassConfig : public TargetPassConfig {
+public:
+  CSKYPassConfig(CSKYTargetMachine &TM, PassManagerBase &PM)
+      : TargetPassConfig(TM, PM) {}
+
+  CSKYTargetMachine &getCSKYTargetMachine() const {
+    return getTM<CSKYTargetMachine>();
+  }
+
+  void addIRPasses() override;
+  bool addInstSelector() override;
+  void addPreEmitPass() override;
+};
+
+} // namespace
+
+TargetPassConfig *CSKYTargetMachine::createPassConfig(PassManagerBase &PM) {
+  return new CSKYPassConfig(*this, PM);
+}
+
+void CSKYPassConfig::addIRPasses() {
+  addPass(createAtomicExpandPass());
+  TargetPassConfig::addIRPasses();
+}
+
+bool CSKYPassConfig::addInstSelector() {
+  addPass(createCSKYISelDag(getCSKYTargetMachine(), getOptLevel()));
+
+  return false;
+}
+
+void CSKYPassConfig::addPreEmitPass() {
+  addPass(createCSKYConstantIslandPass());
+}