The BLX instruction is encoded differently than the BL, because why not? In

[oota-llvm.git] / lib / Target / ARM / ARMMCInstLower.cpp

diff --git a/lib/Target/ARM/ARMMCInstLower.cpp b/lib/Target/ARM/ARMMCInstLower.cpp
index 5d840be46b393a18a89d8ca92311ac3edcbcf7c1..78bb22e8a5ced0ab5cebaf470a6341b462327c2f 100644 (file)
--- a/lib/Target/ARM/ARMMCInstLower.cpp
+++ b/lib/Target/ARM/ARMMCInstLower.cpp
@@ -12,109 +12,46 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "ARMMCInstLower.h"
-//#include "llvm/CodeGen/MachineModuleInfoImpls.h"
-#include "llvm/CodeGen/AsmPrinter.h"
+#include "ARM.h"
+#include "ARMAsmPrinter.h"
+#include "llvm/Constants.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
-//#include "llvm/MC/MCStreamer.h"
 #include "llvm/Target/Mangler.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/ADT/SmallString.h"
 using namespace llvm;
 
 
-#if 0
-const ARMSubtarget &ARMMCInstLower::getSubtarget() const {
-  return AsmPrinter.getSubtarget();
-}
-
-MachineModuleInfoMachO &ARMMCInstLower::getMachOMMI() const {
-  assert(getSubtarget().isTargetDarwin() &&"Can only get MachO info on darwin");
-  return AsmPrinter.MMI->getObjFileInfo<MachineModuleInfoMachO>();
-}
-#endif
-
-MCSymbol *ARMMCInstLower::
-GetGlobalAddressSymbol(const MachineOperand &MO) const {
-  // FIXME: HANDLE PLT references how??
-  switch (MO.getTargetFlags()) {
-  default: assert(0 && "Unknown target flag on GV operand");
-  case 0: break;
-  }
-
-  return Printer.Mang->getSymbol(MO.getGlobal());
-}
-
-MCSymbol *ARMMCInstLower::
-GetExternalSymbolSymbol(const MachineOperand &MO) const {
-  // FIXME: HANDLE PLT references how??
-  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();
-
-#if 0
+static MCOperand GetSymbolRef(const MachineOperand &MO, const MCSymbol *Symbol,
+                              ARMAsmPrinter &Printer) {
+  MCContext &Ctx = Printer.OutContext;
+  const MCExpr *Expr;
   switch (MO.getTargetFlags()) {
-    default: llvm_unreachable("Unknown target flag on GV operand");
+  default: assert(0 && "Unknown target flag on symbol operand");
+  case 0:
+    Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, Ctx);
+    break;
+  case ARMII::MO_LO16:
+    Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_LO16, Ctx);
+    break;
+  case ARMII::MO_HI16:
+    Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_HI16, Ctx);
+    break;
+  case ARMII::MO_PLT:
+    Expr = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_ARM_PLT, Ctx);
+    break;
   }
-#endif
-
-  // 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();
-
-#if 0
-  switch (MO.getTargetFlags()) {
-  default: llvm_unreachable("Unknown target flag on GV operand");
-  }
-#endif
-
-  // 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);
-
-#if 0
-  switch (MO.getTargetFlags()) {
-  default: llvm_unreachable("Unknown target flag on GV operand");
-  }
-#endif
 
   if (!MO.isJTI() && MO.getOffset())
     Expr = MCBinaryExpr::CreateAdd(Expr,
                                    MCConstantExpr::Create(MO.getOffset(), Ctx),
                                    Ctx);
   return MCOperand::CreateExpr(Expr);
-}
 
+}
 
-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) {
@@ -126,8 +63,8 @@ void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
       MI->dump();
       assert(0 && "unknown operand type");
     case MachineOperand::MO_Register:
-      // Ignore all implicit register operands.
-      if (MO.isImplicit()) continue;
+      // 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;
@@ -136,27 +73,32 @@ void ARMMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
       break;
     case MachineOperand::MO_MachineBasicBlock:
       MCOp = MCOperand::CreateExpr(MCSymbolRefExpr::Create(
-                       MO.getMBB()->getSymbol(), Ctx));
+                       MO.getMBB()->getSymbol(), AP.OutContext));
       break;
     case MachineOperand::MO_GlobalAddress:
-      MCOp = LowerSymbolOperand(MO, GetGlobalAddressSymbol(MO));
+      MCOp = GetSymbolRef(MO, AP.Mang->getSymbol(MO.getGlobal()), AP);
       break;
     case MachineOperand::MO_ExternalSymbol:
-      MCOp = LowerSymbolOperand(MO, GetExternalSymbolSymbol(MO));
+      MCOp = GetSymbolRef(MO,
+                          AP.GetExternalSymbolSymbol(MO.getSymbolName()), AP);
       break;
     case MachineOperand::MO_JumpTableIndex:
-      MCOp = LowerSymbolOperand(MO, GetJumpTableSymbol(MO));
+      MCOp = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP);
       break;
     case MachineOperand::MO_ConstantPoolIndex:
-      MCOp = LowerSymbolOperand(MO, GetConstantPoolIndexSymbol(MO));
+      MCOp = GetSymbolRef(MO, AP.GetCPISymbol(MO.getIndex()), AP);
       break;
     case MachineOperand::MO_BlockAddress:
-      MCOp = LowerSymbolOperand(MO, Printer.GetBlockAddressSymbol(
-                                              MO.getBlockAddress()));
+      MCOp = GetSymbolRef(MO,AP.GetBlockAddressSymbol(MO.getBlockAddress()),AP);
+      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);
   }
-
 }