1 files changed, 63 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/BPF/BPFSubtarget.cpp b/contrib/llvm-project/llvm/lib/Target/BPF/BPFSubtarget.cpp
new file mode 100644
index 000000000000..ab3452501b95
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/Target/BPF/BPFSubtarget.cpp
@@ -0,0 +1,63 @@
+//===-- BPFSubtarget.cpp - BPF Subtarget Information ----------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the BPF specific subclass of TargetSubtargetInfo.
+//
+//===----------------------------------------------------------------------===//
+
+#include "BPFSubtarget.h"
+#include "BPF.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "bpf-subtarget"
+
+#define GET_SUBTARGETINFO_TARGET_DESC
+#define GET_SUBTARGETINFO_CTOR
+#include "BPFGenSubtargetInfo.inc"
+
+void BPFSubtarget::anchor() {}
+
+BPFSubtarget &BPFSubtarget::initializeSubtargetDependencies(StringRef CPU,
+                                                            StringRef FS) {
+  initializeEnvironment();
+  initSubtargetFeatures(CPU, FS);
+  ParseSubtargetFeatures(CPU, FS);
+  return *this;
+}
+
+void BPFSubtarget::initializeEnvironment() {
+  HasJmpExt = false;
+  HasJmp32 = false;
+  HasAlu32 = false;
+  UseDwarfRIS = false;
+}
+
+void BPFSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
+  if (CPU == "probe")
+    CPU = sys::detail::getHostCPUNameForBPF();
+  if (CPU == "generic" || CPU == "v1")
+    return;
+  if (CPU == "v2") {
+    HasJmpExt = true;
+    return;
+  }
+  if (CPU == "v3") {
+    HasJmpExt = true;
+    HasJmp32 = true;
+    return;
+  }
+}
+
+BPFSubtarget::BPFSubtarget(const Triple &TT, const std::string &CPU,
+                           const std::string &FS, const TargetMachine &TM)
+    : BPFGenSubtargetInfo(TT, CPU, FS), InstrInfo(),
+      FrameLowering(initializeSubtargetDependencies(CPU, FS)),
+      TLInfo(TM, *this) {}