Hexagon: enable assembler output through the MC layer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154597 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Hexagon/HexagonMCInstLower.cpp b/lib/Target/Hexagon/HexagonMCInstLower.cpp
new file mode 100644
index 0000000..fbb331b
--- /dev/null
+++ b/lib/Target/Hexagon/HexagonMCInstLower.cpp
@@ -0,0 +1,93 @@
+//===- HexagonMCInstLower.cpp - Convert Hexagon 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 Hexagon MachineInstrs to their corresponding
+// MCInst records.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Hexagon.h"
+#include "HexagonAsmPrinter.h"
+#include "HexagonMachineFunctionInfo.h"
+#include "llvm/Constants.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/Target/Mangler.h"
+
+using namespace llvm;
+
+static MCOperand GetSymbolRef(const MachineOperand& MO, const MCSymbol* Symbol,
+ HexagonAsmPrinter& Printer) {
+ MCContext &MC = Printer.OutContext;
+ const MCExpr *ME;
+
+ ME = MCSymbolRefExpr::Create(Symbol, MCSymbolRefExpr::VK_None, MC);
+
+ if (!MO.isJTI() && MO.getOffset())
+ ME = MCBinaryExpr::CreateAdd(ME, MCConstantExpr::Create(MO.getOffset(), MC),
+ MC);
+
+ return (MCOperand::CreateExpr(ME));
+}
+
+// Create an MCInst from a MachineInstr
+void llvm::HexagonLowerToMC(const MachineInstr* MI, MCInst& MCI,
+ HexagonAsmPrinter& AP) {
+ MCI.setOpcode(MI->getOpcode());
+
+ for (unsigned i = 0, e = MI->getNumOperands(); i < e; i++) {
+ const MachineOperand &MO = MI->getOperand(i);
+ MCOperand MCO;
+
+ switch (MO.getType()) {
+ default:
+ MI->dump();
+ assert(0 && "unknown operand type");
+ case MachineOperand::MO_Register:
+ // Ignore all implicit register operands.
+ if (MO.isImplicit()) continue;
+ MCO = MCOperand::CreateReg(MO.getReg());
+ break;
+ case MachineOperand::MO_FPImmediate: {
+ APFloat Val = MO.getFPImm()->getValueAPF();
+ // FP immediates are used only when setting GPRs, so they may be dealt
+ // with like regular immediates from this point on.
+ MCO = MCOperand::CreateImm(*Val.bitcastToAPInt().getRawData());
+ break;
+ }
+ case MachineOperand::MO_Immediate:
+ MCO = MCOperand::CreateImm(MO.getImm());
+ break;
+ case MachineOperand::MO_MachineBasicBlock:
+ MCO = MCOperand::CreateExpr
+ (MCSymbolRefExpr::Create(MO.getMBB()->getSymbol(),
+ AP.OutContext));
+ break;
+ case MachineOperand::MO_GlobalAddress:
+ MCO = GetSymbolRef(MO, AP.Mang->getSymbol(MO.getGlobal()), AP);
+ break;
+ case MachineOperand::MO_ExternalSymbol:
+ MCO = GetSymbolRef(MO, AP.GetExternalSymbolSymbol(MO.getSymbolName()),
+ AP);
+ break;
+ case MachineOperand::MO_JumpTableIndex:
+ MCO = GetSymbolRef(MO, AP.GetJTISymbol(MO.getIndex()), AP);
+ break;
+ case MachineOperand::MO_ConstantPoolIndex:
+ MCO = GetSymbolRef(MO, AP.GetCPISymbol(MO.getIndex()), AP);
+ break;
+ case MachineOperand::MO_BlockAddress:
+ MCO = GetSymbolRef(MO, AP.GetBlockAddressSymbol(MO.getBlockAddress()),AP);
+ break;
+ }
+
+ MCI.addOperand(MCO);
+ }
+}