[Hexagon] Add PIC support

[oota-llvm.git] / lib / Target / Hexagon / MCTargetDesc / HexagonMCTargetDesc.cpp

diff --git a/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp b/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
index 53305d85fd80a34f504b98b67ac6a14b84d5afe5..9a292577a8f3d83cadccbf4f1cd4afa7988b9c05 100644 (file)
--- a/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
+++ b/lib/Target/Hexagon/MCTargetDesc/HexagonMCTargetDesc.cpp
@@ -40,6 +40,20 @@ using namespace llvm;
 #define GET_REGINFO_MC_DESC
 #include "HexagonGenRegisterInfo.inc"
 
+cl::opt<bool> llvm::HexagonDisableCompound
+  ("mno-compound",
+   cl::desc("Disable looking for compound instructions for Hexagon"));
+
+cl::opt<bool> llvm::HexagonDisableDuplex
+  ("mno-pairing",
+   cl::desc("Disable looking for duplex instructions for Hexagon"));
+
+StringRef HEXAGON_MC::selectHexagonCPU(const Triple &TT, StringRef CPU) {
+  if (CPU.empty())
+    CPU = "hexagonv60";
+  return CPU;
+}
+
 MCInstrInfo *llvm::createHexagonMCInstrInfo() {
   MCInstrInfo *X = new MCInstrInfo();
   InitHexagonMCInstrInfo(X);
@@ -54,6 +68,7 @@ static MCRegisterInfo *createHexagonMCRegisterInfo(const Triple &TT) {
 
 static MCSubtargetInfo *
 createHexagonMCSubtargetInfo(const Triple &TT, StringRef CPU, StringRef FS) {
+  CPU = HEXAGON_MC::selectHexagonCPU(TT, CPU);
   return createHexagonMCSubtargetInfoImpl(TT, CPU, FS);
 }
 
@@ -76,28 +91,23 @@ public:
     StringRef Contents(Buffer);
     auto PacketBundle = Contents.rsplit('\n');
     auto HeadTail = PacketBundle.first.split('\n');
-    auto Preamble = "\t{\n\t\t";
-    auto Separator = "";
-    while(!HeadTail.first.empty()) {
-      OS << Separator;
-      StringRef Inst;
+    StringRef Separator = "\n";
+    StringRef Indent = "\t\t";
+    OS << "\t{\n";
+    while (!HeadTail.first.empty()) {
+      StringRef InstTxt;
       auto Duplex = HeadTail.first.split('\v');
-      if(!Duplex.second.empty()){
-        OS << Duplex.first << "\n";
-        Inst = Duplex.second;
-      }
-      else {
-        if(!HeadTail.first.startswith("immext"))
-          Inst = Duplex.first;
+      if (!Duplex.second.empty()) {
+        OS << Indent << Duplex.first << Separator;
+        InstTxt = Duplex.second;
+      } else if (!HeadTail.first.trim().startswith("immext")) {
+        InstTxt = Duplex.first;
       }
-      OS << Preamble;
-      OS << Inst;
+      if (!InstTxt.empty())
+        OS << Indent << InstTxt << Separator;
       HeadTail = HeadTail.second.split('\n');
-      Preamble = "";
-      Separator = "\n\t\t";
     }
-    if(HexagonMCInstrInfo::bundleSize(Inst) != 0)
-      OS << "\n\t}" << PacketBundle.second;
+    OS << "\t}" << PacketBundle.second;
   }
 };
 }
@@ -154,9 +164,9 @@ static MCCodeGenInfo *createHexagonMCCodeGenInfo(const Triple &TT,
                                                  CodeModel::Model CM,
                                                  CodeGenOpt::Level OL) {
   MCCodeGenInfo *X = new MCCodeGenInfo();
-  // For the time being, use static relocations, since there's really no
-  // support for PIC yet.
-  X->initMCCodeGenInfo(Reloc::Static, CM, OL);
+  if (RM == Reloc::Default)
+    RM = Reloc::Static;
+  X->initMCCodeGenInfo(RM, CM, OL);
   return X;
 }