Hexagon backend support

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

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/Target/Hexagon/HexagonSubtarget.cpp b/lib/Target/Hexagon/HexagonSubtarget.cpp
new file mode 100644
index 0000000000..c0aa21b976
--- /dev/null
+++ b/lib/Target/Hexagon/HexagonSubtarget.cpp
@@ -0,0 +1,60 @@
+//===- HexagonSubtarget.cpp - Hexagon Subtarget Information ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Hexagon specific subclass of TargetSubtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#include "HexagonSubtarget.h"
+#include "Hexagon.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
+using namespace llvm;
+
+#define GET_SUBTARGETINFO_MC_DESC
+#define GET_SUBTARGETINFO_CTOR
+#define GET_SUBTARGETINFO_TARGET_DESC
+#include "HexagonGenSubtargetInfo.inc"
+
+static cl::opt<bool>
+EnableV3("enable-hexagon-v3", cl::Hidden,
+         cl::desc("Enable Hexagon V3 instructions."));
+
+static cl::opt<bool>
+EnableMemOps(
+    "enable-hexagon-memops",
+    cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed,
+    cl::desc("Generate V4 MEMOP in code generation for Hexagon target"));
+
+HexagonSubtarget::HexagonSubtarget(StringRef TT, StringRef CPU, StringRef FS):
+  HexagonGenSubtargetInfo(TT, CPU, FS),
+  HexagonArchVersion(V1),
+  CPUString(CPU.str()) {
+  ParseSubtargetFeatures(CPU, FS);
+
+  switch(HexagonArchVersion) {
+  case HexagonSubtarget::V2:
+    break;
+  case HexagonSubtarget::V3:
+    EnableV3 = true;
+    break;
+  case HexagonSubtarget::V4:
+    break;
+  default:
+    llvm_unreachable("Unknown Architecture Version.");
+  }
+
+  // Initialize scheduling itinerary for the specified CPU.
+  InstrItins = getInstrItineraryForCPU(CPUString);
+
+  if (EnableMemOps)
+    UseMemOps = true;
+  else
+    UseMemOps = false;
+}