Fix thumbv4t indirect calls

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

diff --git a/lib/Target/ARM/ARMAsmPrinter.h b/lib/Target/ARM/ARMAsmPrinter.h
index 585268442ce4ba8552ec50cfabbe9c6f5f012b09..a6214911a78350b979d89859a8afffd8df8a89e4 100644 (file)
--- a/lib/Target/ARM/ARMAsmPrinter.h
+++ b/lib/Target/ARM/ARMAsmPrinter.h
@@ -1,4 +1,4 @@
-//===-- ARMAsmPrinter.h - Print machine code to an ARM .s file ------------===//
+//===-- ARMAsmPrinter.h - ARM implementation of AsmPrinter ------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -6,21 +6,22 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-// ARM Assembly printer class.
-//
-//===----------------------------------------------------------------------===//
 
-#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 {
     DW_ISA_ARM_thumb = 1,
@@ -42,70 +43,89 @@ class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {
   /// MachineFunction.
   const MachineConstantPool *MCP;
 
+  /// 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) {
-      Subtarget = &TM.getSubtarget<ARMSubtarget>();
-    }
+    : AsmPrinter(TM, Streamer), AFI(nullptr), MCP(nullptr),
+      InConstantPool(false) {
+    Subtarget = &TM.getSubtarget<ARMSubtarget>();
+  }
 
-  virtual const char *getPassName() const {
-    return "ARM Assembly Printer";
+  const char *getPassName() const override {
+    return "ARM Assembly / Object Emitter";
   }
 
   void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O,
-                    const char *Modifier = 0);
+                    const char *Modifier = nullptr);
+
+  bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
+                       unsigned AsmVariant, const char *ExtraCode,
+                       raw_ostream &O) override;
+  bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
+                             unsigned AsmVariant, const char *ExtraCode,
+                             raw_ostream &O) override;
 
-  virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
-                               unsigned AsmVariant, const char *ExtraCode,
-                               raw_ostream &O);
-  virtual bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
-                                     unsigned AsmVariant,
-                                     const char *ExtraCode, raw_ostream &O);
+  void emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
+                        const MCSubtargetInfo *EndInfo) const override;
 
   void EmitJumpTable(const MachineInstr *MI);
   void EmitJump2Table(const MachineInstr *MI);
-  virtual void EmitInstruction(const MachineInstr *MI);
-  bool runOnMachineFunction(MachineFunction &F);
+  void EmitInstruction(const MachineInstr *MI) override;
+  bool runOnMachineFunction(MachineFunction &F) override;
 
-  virtual void EmitConstantPool() {} // we emit constant pools customly!
-  virtual void EmitFunctionEntryLabel();
-  void EmitStartOfAsmFile(Module &M);
-  void EmitEndOfAsmFile(Module &M);
+  void EmitConstantPool() override {
+    // we emit constant pools customly!
+  }
+  void EmitFunctionBodyEnd() override;
+  void EmitFunctionEntryLabel() override;
+  void EmitStartOfAsmFile(Module &M) override;
+  void EmitEndOfAsmFile(Module &M) override;
+  void EmitXXStructor(const Constant *CV) override;
+
+  // lowerOperand - Convert a MachineOperand into the equivalent MCOperand.
+  bool lowerOperand(const MachineOperand &MO, MCOperand &MCOp);
 
 private:
   // Helpers for EmitStartOfAsmFile() and EmitEndOfAsmFile()
   void emitAttributes();
 
-  // Helper for ELF .o only
-  void emitARMAttributeSection();
-
   // Generic helper used to emit e.g. ARMv5 mul pseudos
   void EmitPatchedInstruction(const MachineInstr *MI, unsigned TargetOpc);
 
-public:
-  void PrintDebugValueComment(const MachineInstr *MI, raw_ostream &OS);
+  void EmitUnwindingInstruction(const MachineInstr *MI);
 
-  MachineLocation getDebugValueLocation(const MachineInstr *MI) const;
+  // emitPseudoExpansionLowering - tblgen'erated.
+  bool emitPseudoExpansionLowering(MCStreamer &OutStreamer,
+                                   const MachineInstr *MI);
 
-  virtual unsigned getISAEncoding() {
+public:
+  unsigned getISAEncoding() override {
     // ARM/Darwin adds ISA to the DWARF info for each function.
-    if (!Subtarget->isTargetDarwin())
+    if (!Subtarget->isTargetMachO())
       return 0;
     return Subtarget->isThumb() ?
-      llvm::ARM::DW_ISA_ARM_thumb : llvm::ARM::DW_ISA_ARM_arm;
+      ARM::DW_ISA_ARM_thumb : ARM::DW_ISA_ARM_arm;
   }
 
-  MCSymbol *GetARMSetPICJumpTableLabel2(unsigned uid, unsigned uid2,
-                                        const MachineBasicBlock *MBB) const;
+private:
+  MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol);
   MCSymbol *GetARMJTIPICJumpTableLabel2(unsigned uid, unsigned uid2) const;
 
-  MCSymbol *GetARMSJLJEHLabel(void) const;
+  MCSymbol *GetARMSJLJEHLabel() const;
 
-  MCSymbol *GetARMGVSymbol(const GlobalValue *GV);
-  
+  MCSymbol *GetARMGVSymbol(const GlobalValue *GV, unsigned char TargetFlags);
+
+public:
   /// EmitMachineConstantPoolValue - Print a machine constantpool value to
   /// the .s file.
-  virtual void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV);
+  void EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) override;
 };
 } // end namespace llvm