X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FARM%2FARMMCInstLower.cpp;h=023f5f8e37a003536a381626db10164b0db00ab7;hb=12af22e8cc217827cf4f118b0f5e4ebbda9925ae;hp=ecd289c79620766febb13e0b3c06d77c0128a108;hpb=b6ec8cae3cf437ea4e3d39ad209a0687df4686c3;p=oota-llvm.git

diff --git a/lib/Target/ARM/ARMMCInstLower.cpp b/lib/Target/ARM/ARMMCInstLower.cpp
index ecd289c7962..023f5f8e37a 100644
--- a/lib/Target/ARM/ARMMCInstLower.cpp
+++ b/lib/Target/ARM/ARMMCInstLower.cpp
@@ -13,171 +13,117 @@
 //===----------------------------------------------------------------------===//
 
 #include "ARM.h"
-#include "ARMMCInstLower.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/Constants.h"
+#include "ARMAsmPrinter.h"
+#include "MCTargetDesc/ARMBaseInfo.h"
+#include "MCTargetDesc/ARMMCExpr.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Mangler.h"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SmallString.h"
 using namespace llvm;
 
-MCSymbol *ARMMCInstLower::GetGlobalAddressSymbol(const GlobalValue *GV) const {
-  return Printer.Mang->getSymbol(GV);
-}
-
-const MCSymbolRefExpr *ARMMCInstLower::
-GetSymbolRef(const MachineOperand &MO) const {
-  assert(MO.isGlobal() && "Isn't a global address reference?");
-  // FIXME: HANDLE PLT references how??
 
-  const MCSymbolRefExpr *SymRef;
-  const MCSymbol *Symbol = GetGlobalAddressSymbol(MO.getGlobal());
-
-  switch (MO.getTargetFlags()) {
-  default: assert(0 && "Unknown target flag on GV operand");
-  case 0:
-    SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, Ctx);
-    break;
-  case ARMII::MO_LO16:
-    SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_LO16, Ctx);
-    break;
-  case ARMII::MO_HI16:
-    SymRef = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_HI16, Ctx);
+MCOperand ARMAsmPrinter::GetSymbolRef(const MachineOperand &MO,
+                                      const MCSymbol *Symbol) {
+  const MCExpr *Expr;
+  unsigned Option = MO.getTargetFlags() & ARMII::MO_OPTION_MASK;
+  switch (Option) {
+  default: {
+    Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None,
+                                   OutContext);
+    switch (Option) {
+    default: llvm_unreachable("Unknown target flag on symbol operand");
+    case ARMII::MO_NO_FLAG:
+      break;
+    case ARMII::MO_LO16:
+      Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None,
+                                     OutContext);
+      Expr = ARMMCExpr::CreateLower16(Expr, OutContext);
+      break;
+    case ARMII::MO_HI16:
+      Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None,
+                                     OutContext);
+      Expr = ARMMCExpr::CreateUpper16(Expr, OutContext);
+      break;
+    }
     break;
   }
 
-  return SymRef;
-}
-
-MCSymbol *ARMMCInstLower::
-GetExternalSymbolSymbol(const MachineOperand &MO) const {
-  // FIXME: HANDLE PLT references how??
-  // FIXME: This probably needs to be merged with the above SymbolRef stuff
-  // to handle :lower16: and :upper16: (?)
-  switch (MO.getTargetFlags()) {
-  default: assert(0 && "Unknown target flag on GV operand");
-  case 0: break;
-  }
-
-  return Printer.GetExternalSymbolSymbol(MO.getSymbolName());
-}
-
-
-
-MCSymbol *ARMMCInstLower::
-GetJumpTableSymbol(const MachineOperand &MO) const {
-  SmallString<256> Name;
-  raw_svector_ostream(Name) << Printer.MAI->getPrivateGlobalPrefix() << "JTI"
-    << Printer.getFunctionNumber() << '_' << MO.getIndex();
-
-  switch (MO.getTargetFlags()) {
-  default: assert(0 && "Unknown target flag on jump table operand");
-  case 0: break;
-  }
-
-  // Create a symbol for the name.
-  return Ctx.GetOrCreateSymbol(Name.str());
-}
-
-MCSymbol *ARMMCInstLower::
-GetConstantPoolIndexSymbol(const MachineOperand &MO) const {
-  SmallString<256> Name;
-  raw_svector_ostream(Name) << Printer.MAI->getPrivateGlobalPrefix() << "CPI"
-    << Printer.getFunctionNumber() << '_' << MO.getIndex();
-
-  switch (MO.getTargetFlags()) {
-  default: assert(0 && "Unknown target flag on CPI operand");
-  case 0: break;
-  }
-
-  // Create a symbol for the name.
-  return Ctx.GetOrCreateSymbol(Name.str());
-}
-
-MCOperand ARMMCInstLower::
-LowerSymbolOperand(const MachineOperand &MO, MCSymbol *Sym) const {
-  // FIXME: We would like an efficient form for this, so we don't have to do a
-  // lot of extra uniquing.
-  const MCExpr *Expr = MCSymbolRefExpr::Create(Sym, Ctx);
-
-  switch (MO.getTargetFlags()) {
-  default: assert(0 && "Unknown target flag on Symbol operand");
-  case 0: break;
+  case ARMII::MO_PLT:
+    Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_PLT,
+                                   OutContext);
+    break;
   }
 
   if (!MO.isJTI() && MO.getOffset())
     Expr = MCBinaryExpr::CreateAdd(Expr,
-                                   MCConstantExpr::Create(MO.getOffset(), Ctx),
-                                   Ctx);
+                                   MCConstantExpr::Create(MO.getOffset(),
+                                                          OutContext),
+                                   OutContext);
   return MCOperand::CreateExpr(Expr);
-}
 
-MCOperand ARMMCInstLower::
-LowerSymbolRefOperand(const MachineOperand &MO,
-                      const MCSymbolRefExpr *Sym) const {
-  const MCExpr *Expr = Sym;
-  if (!MO.isJTI() && MO.getOffset())
-    Expr = MCBinaryExpr::CreateAdd(Expr,
-                                   MCConstantExpr::Create(MO.getOffset(), Ctx),
-                                   Ctx);
-  return MCOperand::CreateExpr(Expr);
 }
 
+bool ARMAsmPrinter::lowerOperand(const MachineOperand &MO,
+                                 MCOperand &MCOp) {
+  switch (MO.getType()) {
+  default: llvm_unreachable("unknown operand type");
+  case MachineOperand::MO_Register:
+    // Ignore all non-CPSR implicit register operands.
+    if (MO.isImplicit() && MO.getReg() != ARM::CPSR)
+      return false;
+    assert(!MO.getSubReg() && "Subregs should be eliminated!");
+    MCOp = MCOperand::CreateReg(MO.getReg());
+    break;
+  case MachineOperand::MO_Immediate:
+    MCOp = MCOperand::CreateImm(MO.getImm());
+    break;
+  case MachineOperand::MO_MachineBasicBlock:
+    MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
+        MO.getMBB()->getSymbol(), OutContext));
+    break;
+  case MachineOperand::MO_GlobalAddress: {
+    MCOp = GetSymbolRef(MO,
+                        GetARMGVSymbol(MO.getGlobal(), MO.getTargetFlags()));
+    break;
+  }
+  case MachineOperand::MO_ExternalSymbol:
+   MCOp = GetSymbolRef(MO,
+                        GetExternalSymbolSymbol(MO.getSymbolName()));
+    break;
+  case MachineOperand::MO_JumpTableIndex:
+    MCOp = GetSymbolRef(MO, GetJTISymbol(MO.getIndex()));
+    break;
+  case MachineOperand::MO_ConstantPoolIndex:
+    MCOp = GetSymbolRef(MO, GetCPISymbol(MO.getIndex()));
+    break;
+  case MachineOperand::MO_BlockAddress:
+    MCOp = GetSymbolRef(MO, GetBlockAddressSymbol(MO.getBlockAddress()));
+    break;
+  case MachineOperand::MO_FPImmediate: {
+    APFloat Val = MO.getFPImm()->getValueAPF();
+    bool ignored;
+    Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored);
+    MCOp = MCOperand::CreateFPImm(Val.convertToDouble());
+    break;
+  }
+  case MachineOperand::MO_RegisterMask:
+    // Ignore call clobbers.
+    return false;
+  }
+  return true;
+}
 
-void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
+void llvm::LowerARMMachineInstrToMCInst(const MachineInstr *MI, MCInst &OutMI,
+                                        ARMAsmPrinter &AP) {
   OutMI.setOpcode(MI->getOpcode());
 
   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
     const MachineOperand &MO = MI->getOperand(i);
 
     MCOperand MCOp;
-    switch (MO.getType()) {
-    default:
-      MI->dump();
-      assert(0 && "unknown operand type");
-    case MachineOperand::MO_Register:
-      // Ignore all non-CPSR implicit register operands.
-      if (MO.isImplicit() && MO.getReg() != ARM::CPSR) continue;
-      assert(!MO.getSubReg() && "Subregs should be eliminated!");
-      MCOp = MCOperand::CreateReg(MO.getReg());
-      break;
-    case MachineOperand::MO_Immediate:
-      MCOp = MCOperand::CreateImm(MO.getImm());
-      break;
-    case MachineOperand::MO_MachineBasicBlock:
-      MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
-                       MO.getMBB()->getSymbol(), Ctx));
-      break;
-    case MachineOperand::MO_GlobalAddress:
-      MCOp = LowerSymbolRefOperand(MO, GetSymbolRef(MO));
-      break;
-    case MachineOperand::MO_ExternalSymbol:
-      MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
-      break;
-    case MachineOperand::MO_JumpTableIndex:
-      MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
-      break;
-    case MachineOperand::MO_ConstantPoolIndex:
-      MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
-      break;
-    case MachineOperand::MO_BlockAddress:
-      MCOp = LowerSymbolOperand(MO, Printer.GetBlockAddressSymbol(
-                                              MO.getBlockAddress()));
-      break;
-    case MachineOperand::MO_FPImmediate:
-      APFloat Val = MO.getFPImm()->getValueAPF();
-      bool ignored;
-      Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored);
-      MCOp = MCOperand::CreateFPImm(Val.convertToDouble());
-      break;
-    }
-
-    OutMI.addOperand(MCOp);
+    if (AP.lowerOperand(MO, MCOp))
+      OutMI.addOperand(MCOp);
   }
-
 }