stub out PPCMCInstLowering, add a new option that uses it and the new

instprinter when -enable-ppc-inst-printer is passed to llc.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119061 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 75 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCMCInstLower.cpp b/lib/Target/PowerPC/PPCMCInstLower.cpp
new file mode 100644
index 0000000000..afed393638
--- /dev/null
+++ b/lib/Target/PowerPC/PPCMCInstLower.cpp
@@ -0,0 +1,75 @@
+//===-- PPCMCInstLower.cpp - Convert PPC MachineInstr to an MCInst --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains code to lower PPC MachineInstrs to their corresponding
+// MCInst records.
+//
+//===----------------------------------------------------------------------===//
+
+#include "PPCMCInstLower.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+
+using namespace llvm;
+
+void PPCMCInstLower::Lower(const MachineInstr *MI, MCInst &OutMI) const {
+  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:
+      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;
+#if 0
+    case MachineOperand::MO_GlobalAddress:
+      MCOp = LowerSymbolRefOperand(MO, GetSymbolRef(MO));
+      break;
+    case MachineOperand::MO_ExternalSymbol:
+      MCOp = LowerSymbolRefOperand(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;
+#endif
+#if 0
+    case MachineOperand::MO_FPImmediate:
+      APFloat Val = MO.getFPImm()->getValueAPF();
+      bool ignored;
+      Val.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &ignored);
+      MCOp = MCOperand::CreateFPImm(Val.convertToDouble());
+      break;
+#endif
+    }
+    
+    OutMI.addOperand(MCOp);
+  }
+}