[bpf] expand indirect branches

[oota-llvm.git] / lib / Target / ARM / ARMAsmPrinter.h

diff --git a/lib/Target/ARM/ARMAsmPrinter.h b/lib/Target/ARM/ARMAsmPrinter.h
index cf85a5b3b990326d2494b6b9d5c8239ec30aeffc..fb925f162f70d6bccbcd81542e73c9fe2f763e27 100644 (file)
--- a/lib/Target/ARM/ARMAsmPrinter.h
+++ b/lib/Target/ARM/ARMAsmPrinter.h
@@ -7,17 +7,20 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef ARMASMPRINTER_H
-#define ARMASMPRINTER_H
+#ifndef LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
+#define LLVM_LIB_TARGET_ARM_ARMASMPRINTER_H
 
-#include "ARM.h"
-#include "ARMTargetMachine.h"
+#include "ARMSubtarget.h"
 #include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/Support/Compiler.h"
+#include "llvm/Target/TargetMachine.h"
 
 namespace llvm {
 
+class ARMFunctionInfo;
 class MCOperand;
+class MachineConstantPool;
+class MachineOperand;
+class MCSymbol;
 
 namespace ARM {
   enum DW_ISA {
@@ -43,18 +46,20 @@ class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
   /// InConstantPool - Maintain state when emitting a sequence of constant
   /// pool entries so we can properly mark them as data regions.
   bool InConstantPool;
+
+  /// ThumbIndirectPads - These maintain a per-function list of jump pad
+  /// labels used for ARMv4t thumb code to make register indirect calls.
+  SmallVector<std::pair<unsigned, MCSymbol*>, 4> ThumbIndirectPads;
+
 public:
-  explicit ARMAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
-    : AsmPrinter(TM, Streamer), AFI(NULL), MCP(NULL), InConstantPool(false) {
-      Subtarget = &TM.getSubtarget<ARMSubtarget>();
-    }
+  explicit ARMAsmPrinter(TargetMachine &TM,
+                         std::unique_ptr<MCStreamer> Streamer);
 
   const char *getPassName() const override {
     return "ARM Assembly / Object Emitter";
   }
 
-  void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
-                    const char *Modifier = 0);
+  void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O);
 
   bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
                        unsigned AsmVariant, const char *ExtraCode,
@@ -66,8 +71,9 @@ public:
   void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
                         const MCSubtargetInfo *EndInfo) const override;
 
-  void EmitJumpTable(const MachineInstr *MI);
-  void EmitJump2Table(const MachineInstr *MI);
+  void EmitJumpTableAddrs(const MachineInstr *MI);
+  void EmitJumpTableInsts(const MachineInstr *MI);
+  void EmitJumpTableTBInst(const MachineInstr *MI, unsigned OffsetWidth);
   void EmitInstruction(const MachineInstr *MI) override;
   bool runOnMachineFunction(MachineFunction &F) override;
 
@@ -78,7 +84,7 @@ public:
   void EmitFunctionEntryLabel() override;
   void EmitStartOfAsmFile(Module &M) override;
   void EmitEndOfAsmFile(Module &M) override;
-  void EmitXXStructor(const Constant *CV) override;
+  void EmitXXStructor(const DataLayout &DL, const Constant *CV) override;
 
   // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
   bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
@@ -99,17 +105,19 @@ private:
 public:
   unsigned getISAEncoding() override {
     // ARM/Darwin adds ISA to the DWARF info for each function.
-    if (!Subtarget->isTargetMachO())
+    const Triple &TT = TM.getTargetTriple();
+    if (!TT.isOSBinFormatMachO())
       return 0;
-    return Subtarget->isThumb() ?
-      ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
+    bool isThumb = TT.getArch() == Triple::thumb ||
+                   TT.getArch() == Triple::thumbeb ||
+                   TT.getSubArch() == Triple::ARMSubArch_v7m ||
+                   TT.getSubArch() == Triple::ARMSubArch_v6m;
+    return isThumb ? ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
   }
 
 private:
   MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
-  MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
-
-  MCSymbol *GetARMSJLJEHLabel() const;
+  MCSymbol *GetARMJTIPICJumpTableLabel(unsigned uid) const;
 
   MCSymbol *GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags);