[FastISel][AArch64] Fix a few BuildMI callsites where the result register was added...

[oota-llvm.git] / lib / Target / MSP430 / MSP430AsmPrinter.cpp

diff --git a/lib/Target/MSP430/MSP430AsmPrinter.cpp b/lib/Target/MSP430/MSP430AsmPrinter.cpp
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..22a973eb179e09f144b3e65b581ede347446a5e7 100644 (file)
--- a/lib/Target/MSP430/MSP430AsmPrinter.cpp
+++ b/lib/Target/MSP430/MSP430AsmPrinter.cpp
@@ -0,0 +1,161 @@
+//===-- MSP430AsmPrinter.cpp - MSP430 LLVM assembly writer ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains a printer that converts from our internal representation
+// of machine-dependent LLVM code to the MSP430 assembly language.
+//
+//===----------------------------------------------------------------------===//
+
+#include "MSP430.h"
+#include "InstPrinter/MSP430InstPrinter.h"
+#include "MSP430InstrInfo.h"
+#include "MSP430MCInstLower.h"
+#include "MSP430TargetMachine.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "asm-printer"
+
+namespace {
+  class MSP430AsmPrinter : public AsmPrinter {
+  public:
+    MSP430AsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
+      : AsmPrinter(TM, Streamer) {}
+
+    const char *getPassName() const override {
+      return "MSP430 Assembly Printer";
+    }
+
+    void printOperand(const MachineInstr *MI, int OpNum,
+                      raw_ostream &O, const char* Modifier = nullptr);
+    void printSrcMemOperand(const MachineInstr *MI, int OpNum,
+                            raw_ostream &O);
+    bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                         unsigned AsmVariant, const char *ExtraCode,
+                         raw_ostream &O) override;
+    bool PrintAsmMemoryOperand(const MachineInstr *MI,
+                               unsigned OpNo, unsigned AsmVariant,
+                               const char *ExtraCode, raw_ostream &O) override;
+    void EmitInstruction(const MachineInstr *MI) override;
+  };
+} // end of anonymous namespace
+
+
+void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
+                                    raw_ostream &O, const char *Modifier) {
+  const MachineOperand &MO = MI->getOperand(OpNum);
+  switch (MO.getType()) {
+  default: llvm_unreachable("Not implemented yet!");
+  case MachineOperand::MO_Register:
+    O << MSP430InstPrinter::getRegisterName(MO.getReg());
+    return;
+  case MachineOperand::MO_Immediate:
+    if (!Modifier || strcmp(Modifier, "nohash"))
+      O << '#';
+    O << MO.getImm();
+    return;
+  case MachineOperand::MO_MachineBasicBlock:
+    O << *MO.getMBB()->getSymbol();
+    return;
+  case MachineOperand::MO_GlobalAddress: {
+    bool isMemOp  = Modifier && !strcmp(Modifier, "mem");
+    uint64_t Offset = MO.getOffset();
+
+    // If the global address expression is a part of displacement field with a
+    // register base, we should not emit any prefix symbol here, e.g.
+    //   mov.w &foo, r1
+    // vs
+    //   mov.w glb(r1), r2
+    // Otherwise (!) msp430-as will silently miscompile the output :(
+    if (!Modifier || strcmp(Modifier, "nohash"))
+      O << (isMemOp ? '&' : '#');
+    if (Offset)
+      O << '(' << Offset << '+';
+
+    O << *getSymbol(MO.getGlobal());
+
+    if (Offset)
+      O << ')';
+
+    return;
+  }
+  }
+}
+
+void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
+                                          raw_ostream &O) {
+  const MachineOperand &Base = MI->getOperand(OpNum);
+  const MachineOperand &Disp = MI->getOperand(OpNum+1);
+
+  // Print displacement first
+
+  // Imm here is in fact global address - print extra modifier.
+  if (Disp.isImm() && !Base.getReg())
+    O << '&';
+  printOperand(MI, OpNum+1, O, "nohash");
+
+  // Print register base field
+  if (Base.getReg()) {
+    O << '(';
+    printOperand(MI, OpNum, O);
+    O << ')';
+  }
+}
+
+/// PrintAsmOperand - Print out an operand for an inline asm expression.
+///
+bool MSP430AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+                                       unsigned AsmVariant,
+                                       const char *ExtraCode, raw_ostream &O) {
+  // Does this asm operand have a single letter operand modifier?
+  if (ExtraCode && ExtraCode[0])
+    return true; // Unknown modifier.
+
+  printOperand(MI, OpNo, O);
+  return false;
+}
+
+bool MSP430AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
+                                             unsigned OpNo, unsigned AsmVariant,
+                                             const char *ExtraCode,
+                                             raw_ostream &O) {
+  if (ExtraCode && ExtraCode[0]) {
+    return true; // Unknown modifier.
+  }
+  printSrcMemOperand(MI, OpNo, O);
+  return false;
+}
+
+//===----------------------------------------------------------------------===//
+void MSP430AsmPrinter::EmitInstruction(const MachineInstr *MI) {
+  MSP430MCInstLower MCInstLowering(OutContext, *this);
+
+  MCInst TmpInst;
+  MCInstLowering.Lower(MI, TmpInst);
+  EmitToStreamer(OutStreamer, TmpInst);
+}
+
+// Force static initialization.
+extern "C" void LLVMInitializeMSP430AsmPrinter() {
+  RegisterAsmPrinter<MSP430AsmPrinter> X(TheMSP430Target);
+}