From 5d5cc59cc77afe655b3707cb0e69e0827b444cad Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Fri, 17 Sep 2010 15:48:55 +0000
Subject: Vendor import of llvm r114020 (from the release_28 branch):
http://llvm.org/svn/llvm-project/llvm/branches/release_28@114020
Approved by: rpaulo (mentor)
---
lib/Target/ARM/ARMMCInstLower.cpp | 162 ++++++++++++++++++++++++++++++++++++++
1 file changed, 162 insertions(+)
create mode 100644 lib/Target/ARM/ARMMCInstLower.cpp
(limited to 'lib/Target/ARM/ARMMCInstLower.cpp')
diff --git a/lib/Target/ARM/ARMMCInstLower.cpp b/lib/Target/ARM/ARMMCInstLower.cpp
new file mode 100644
index 0000000..ab2b06b
--- /dev/null
+++ b/lib/Target/ARM/ARMMCInstLower.cpp
@@ -0,0 +1,162 @@
+//===-- ARMMCInstLower.cpp - Convert ARM 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 ARM MachineInstrs to their corresponding
+// MCInst records.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ARMMCInstLower.h"
+//#include "llvm/CodeGen/MachineModuleInfoImpls.h"
+#include "llvm/CodeGen/AsmPrinter.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
+ switch (MO.getTargetFlags()) {
+ default: llvm_unreachable("Unknown target flag on GV operand");
+ }
+#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 {
+ 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 implicit register operands.
+ if (MO.isImplicit()) 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 = LowerSymbolOperand(MO, GetGlobalAddressSymbol(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;
+ }
+
+ OutMI.addOperand(MCOp);
+ }
+
+}
--
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