X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FMips%2FMipsMCInstLower.cpp;h=85f78674661105670d4cd47b1be1e9d0d3954e47;hb=7ef85447c950ef801414251a2ce49d2564cbf5da;hp=b6042af619d30c9164262a6c4e895e0b8ad6e14f;hpb=864f66085cd9543070ef01b9f7371c110ecd7898;p=oota-llvm.git

diff --git a/lib/Target/Mips/MipsMCInstLower.cpp b/lib/Target/Mips/MipsMCInstLower.cpp
index b6042af619d..85f78674661 100644
--- a/lib/Target/Mips/MipsMCInstLower.cpp
+++ b/lib/Target/Mips/MipsMCInstLower.cpp
@@ -11,26 +11,24 @@
 // MCInst records.
 //
 //===----------------------------------------------------------------------===//
-
 #include "MipsMCInstLower.h"
+#include "MCTargetDesc/MipsBaseInfo.h"
 #include "MipsAsmPrinter.h"
 #include "MipsInstrInfo.h"
-#include "MCTargetDesc/MipsBaseInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
 #include "llvm/CodeGen/MachineInstr.h"
 #include "llvm/CodeGen/MachineOperand.h"
+#include "llvm/IR/Mangler.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCExpr.h"
 #include "llvm/MC/MCInst.h"
-#include "llvm/Target/Mangler.h"
 
 using namespace llvm;
 
 MipsMCInstLower::MipsMCInstLower(MipsAsmPrinter &asmprinter)
   : AsmPrinter(asmprinter) {}
 
-void MipsMCInstLower::Initialize(Mangler *M, MCContext *C) {
-  Mang = M;
+void MipsMCInstLower::Initialize(MCContext *C) {
   Ctx = C;
 }
 
@@ -61,6 +59,12 @@ MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
   case MipsII::MO_GOT_DISP:  Kind = MCSymbolRefExpr::VK_Mips_GOT_DISP; break;
   case MipsII::MO_GOT_PAGE:  Kind = MCSymbolRefExpr::VK_Mips_GOT_PAGE; break;
   case MipsII::MO_GOT_OFST:  Kind = MCSymbolRefExpr::VK_Mips_GOT_OFST; break;
+  case MipsII::MO_HIGHER:    Kind = MCSymbolRefExpr::VK_Mips_HIGHER; break;
+  case MipsII::MO_HIGHEST:   Kind = MCSymbolRefExpr::VK_Mips_HIGHEST; break;
+  case MipsII::MO_GOT_HI16:  Kind = MCSymbolRefExpr::VK_Mips_GOT_HI16; break;
+  case MipsII::MO_GOT_LO16:  Kind = MCSymbolRefExpr::VK_Mips_GOT_LO16; break;
+  case MipsII::MO_CALL_HI16: Kind = MCSymbolRefExpr::VK_Mips_CALL_HI16; break;
+  case MipsII::MO_CALL_LO16: Kind = MCSymbolRefExpr::VK_Mips_CALL_LO16; break;
   }
 
   switch (MOTy) {
@@ -69,7 +73,7 @@ MCOperand MipsMCInstLower::LowerSymbolOperand(const MachineOperand &MO,
     break;
 
   case MachineOperand::MO_GlobalAddress:
-    Symbol = Mang->getSymbol(MO.getGlobal());
+    Symbol = AsmPrinter.getSymbol(MO.getGlobal());
     Offset += MO.getOffset();
     break;
 
@@ -147,7 +151,82 @@ MCOperand MipsMCInstLower::LowerOperand(const MachineOperand &MO,
   return MCOperand();
 }
 
+MCOperand MipsMCInstLower::createSub(MachineBasicBlock *BB1,
+                                     MachineBasicBlock *BB2,
+                                     MCSymbolRefExpr::VariantKind Kind) const {
+  const MCSymbolRefExpr *Sym1 = MCSymbolRefExpr::Create(BB1->getSymbol(), *Ctx);
+  const MCSymbolRefExpr *Sym2 = MCSymbolRefExpr::Create(BB2->getSymbol(), *Ctx);
+  const MCBinaryExpr *Sub = MCBinaryExpr::CreateSub(Sym1, Sym2, *Ctx);
+
+  return MCOperand::CreateExpr(MipsMCExpr::Create(Kind, Sub, *Ctx));
+}
+
+void MipsMCInstLower::
+lowerLongBranchLUi(const MachineInstr *MI, MCInst &OutMI, int Opcode,
+                   MCSymbolRefExpr::VariantKind Kind) const {
+  OutMI.setOpcode(Opcode);
+
+  // Lower register operand.
+  OutMI.addOperand(LowerOperand(MI->getOperand(0)));
+
+  // Create %hi($tgt-$baltgt) or %highest($tgt-$baltgt).
+  OutMI.addOperand(createSub(MI->getOperand(1).getMBB(),
+                             MI->getOperand(2).getMBB(), Kind));
+}
+
+void MipsMCInstLower::
+lowerLongBranchADDiu(const MachineInstr *MI, MCInst &OutMI, int Opcode,
+                     MCSymbolRefExpr::VariantKind Kind) const {
+  OutMI.setOpcode(Opcode);
+
+  // Lower two register operands.
+  for (unsigned I = 0, E = 2; I != E; ++I) {
+    const MachineOperand &MO = MI->getOperand(I);
+    OutMI.addOperand(LowerOperand(MO));
+  }
+
+  // Create %lo($tgt-$baltgt), %hi($tgt-$baltgt) or %higher($tgt-$baltgt).
+  OutMI.addOperand(createSub(MI->getOperand(2).getMBB(),
+                             MI->getOperand(3).getMBB(), Kind));
+}
+
+bool MipsMCInstLower::lowerLongBranch(const MachineInstr *MI,
+                                      MCInst &OutMI) const {
+  switch (MI->getOpcode()) {
+  default:
+    return false;
+  case Mips::LONG_BRANCH_LUi:
+    lowerLongBranchLUi(MI, OutMI, Mips::LUi, MCSymbolRefExpr::VK_Mips_ABS_HI);
+    return true;
+  case Mips::LONG_BRANCH_LUi64:
+    lowerLongBranchLUi(MI, OutMI, Mips::LUi64,
+                       MCSymbolRefExpr::VK_Mips_HIGHEST);
+    return true;
+  case Mips::LONG_BRANCH_ADDiu:
+    lowerLongBranchADDiu(MI, OutMI, Mips::ADDiu,
+                         MCSymbolRefExpr::VK_Mips_ABS_LO);
+    return true;
+  case Mips::LONG_BRANCH_DADDiu:
+    unsigned TargetFlags = MI->getOperand(2).getTargetFlags();
+    if (TargetFlags == MipsII::MO_HIGHER)
+      lowerLongBranchADDiu(MI, OutMI, Mips::DADDiu,
+                           MCSymbolRefExpr::VK_Mips_HIGHER);
+    else if (TargetFlags == MipsII::MO_ABS_HI)
+      lowerLongBranchADDiu(MI, OutMI, Mips::DADDiu,
+                           MCSymbolRefExpr::VK_Mips_ABS_HI);
+    else if (TargetFlags == MipsII::MO_ABS_LO)
+      lowerLongBranchADDiu(MI, OutMI, Mips::DADDiu,
+                           MCSymbolRefExpr::VK_Mips_ABS_LO);
+    else
+      report_fatal_error("Unexpected flags for LONG_BRANCH_DADDiu");
+    return true;
+  }
+}
+
 void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
+  if (lowerLongBranch(MI, OutMI))
+    return;
+
   OutMI.setOpcode(MI->getOpcode());
 
   for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
@@ -158,3 +237,4 @@ void MipsMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
       OutMI.addOperand(MCOp);
   }
 }
+