summaryrefslogtreecommitdiffstats
path: root/contrib/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp')
-rw-r--r--contrib/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp326
1 files changed, 0 insertions, 326 deletions
diff --git a/contrib/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp b/contrib/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
deleted file mode 100644
index 7dafaef..0000000
--- a/contrib/llvm/lib/Target/MBlaze/MBlazeAsmPrinter.cpp
+++ /dev/null
@@ -1,326 +0,0 @@
-//===-- MBlazeAsmPrinter.cpp - MBlaze LLVM assembly writer ----------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file contains a printer that converts from our internal representation
-// of machine-dependent LLVM code to GAS-format MBlaze assembly language.
-//
-//===----------------------------------------------------------------------===//
-
-#define DEBUG_TYPE "mblaze-asm-printer"
-
-#include "MBlaze.h"
-#include "InstPrinter/MBlazeInstPrinter.h"
-#include "MBlazeInstrInfo.h"
-#include "MBlazeMCInstLower.h"
-#include "MBlazeMachineFunction.h"
-#include "MBlazeSubtarget.h"
-#include "MBlazeTargetMachine.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/IR/Constants.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DerivedTypes.h"
-#include "llvm/IR/Module.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/raw_ostream.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include <cctype>
-
-using namespace llvm;
-
-namespace {
- class MBlazeAsmPrinter : public AsmPrinter {
- const MBlazeSubtarget *Subtarget;
- public:
- explicit MBlazeAsmPrinter(TargetMachine &TM, MCStreamer &Streamer)
- : AsmPrinter(TM, Streamer) {
- Subtarget = &TM.getSubtarget<MBlazeSubtarget>();
- }
-
- virtual const char *getPassName() const {
- return "MBlaze Assembly Printer";
- }
-
- void printSavedRegsBitmask();
- void emitFrameDirective();
- virtual void EmitFunctionBodyStart();
- virtual void EmitFunctionBodyEnd();
- virtual void EmitFunctionEntryLabel();
-
- virtual bool isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB)
- const;
-
- bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
- unsigned AsmVariant, const char *ExtraCode,
- raw_ostream &O);
- void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
- void printUnsignedImm(const MachineInstr *MI, int opNum, raw_ostream &O);
- void printFSLImm(const MachineInstr *MI, int opNum, raw_ostream &O);
- void printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
- const char *Modifier = 0);
-
- void EmitInstruction(const MachineInstr *MI);
- };
-} // end of anonymous namespace
-
-// #include "MBlazeGenAsmWriter.inc"
-
-//===----------------------------------------------------------------------===//
-//
-// MBlaze Asm Directives
-//
-// -- Frame directive "frame Stackpointer, Stacksize, RARegister"
-// Describe the stack frame.
-//
-// -- Mask directives "mask bitmask, offset"
-// Tells the assembler which registers are saved and where.
-// bitmask - contain a little endian bitset indicating which registers are
-// saved on function prologue (e.g. with a 0x80000000 mask, the
-// assembler knows the register 31 (RA) is saved at prologue.
-// offset - the position before stack pointer subtraction indicating where
-// the first saved register on prologue is located. (e.g. with a
-//
-// Consider the following function prologue:
-//
-// .frame R19,48,R15
-// .mask 0xc0000000,-8
-// addiu R1, R1, -48
-// sw R15, 40(R1)
-// sw R19, 36(R1)
-//
-// With a 0xc0000000 mask, the assembler knows the register 15 (R15) and
-// 19 (R19) are saved at prologue. As the save order on prologue is from
-// left to right, R15 is saved first. A -8 offset means that after the
-// stack pointer subtration, the first register in the mask (R15) will be
-// saved at address 48-8=40.
-//
-//===----------------------------------------------------------------------===//
-
-// Print a 32 bit hex number with all numbers.
-static void printHex32(unsigned int Value, raw_ostream &O) {
- O << "0x";
- for (int i = 7; i >= 0; i--)
- O.write_hex((Value & (0xF << (i*4))) >> (i*4));
-}
-
-// Create a bitmask with all callee saved registers for CPU or Floating Point
-// registers. For CPU registers consider RA, GP and FP for saving if necessary.
-void MBlazeAsmPrinter::printSavedRegsBitmask() {
- const TargetFrameLowering *TFI = TM.getFrameLowering();
- const TargetRegisterInfo &RI = *TM.getRegisterInfo();
-
- // CPU Saved Registers Bitmasks
- unsigned int CPUBitmask = 0;
-
- // Set the CPU Bitmasks
- const MachineFrameInfo *MFI = MF->getFrameInfo();
- const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo();
- for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
- unsigned Reg = CSI[i].getReg();
- unsigned RegNum = getMBlazeRegisterNumbering(Reg);
- if (MBlaze::GPRRegClass.contains(Reg))
- CPUBitmask |= (1 << RegNum);
- }
-
- // Return Address and Frame registers must also be set in CPUBitmask.
- if (TFI->hasFP(*MF))
- CPUBitmask |= (1 << getMBlazeRegisterNumbering(RI.getFrameRegister(*MF)));
-
- if (MFI->adjustsStack())
- CPUBitmask |= (1 << getMBlazeRegisterNumbering(RI.getRARegister()));
-
- // Print CPUBitmask
- OutStreamer.EmitRawText("\t.mask\t0x" + Twine::utohexstr(CPUBitmask));
-}
-
-/// Frame Directive
-void MBlazeAsmPrinter::emitFrameDirective() {
- if (!OutStreamer.hasRawTextSupport())
- return;
-
- const TargetRegisterInfo &RI = *TM.getRegisterInfo();
- unsigned stkReg = RI.getFrameRegister(*MF);
- unsigned retReg = RI.getRARegister();
- unsigned stkSze = MF->getFrameInfo()->getStackSize();
-
- OutStreamer.EmitRawText("\t.frame\t" +
- Twine(MBlazeInstPrinter::getRegisterName(stkReg)) +
- "," + Twine(stkSze) + "," +
- Twine(MBlazeInstPrinter::getRegisterName(retReg)));
-}
-
-void MBlazeAsmPrinter::EmitFunctionEntryLabel() {
- if (OutStreamer.hasRawTextSupport())
- OutStreamer.EmitRawText("\t.ent\t" + Twine(CurrentFnSym->getName()));
- AsmPrinter::EmitFunctionEntryLabel();
-}
-
-void MBlazeAsmPrinter::EmitFunctionBodyStart() {
- if (!OutStreamer.hasRawTextSupport())
- return;
-
- emitFrameDirective();
- printSavedRegsBitmask();
-}
-
-void MBlazeAsmPrinter::EmitFunctionBodyEnd() {
- if (OutStreamer.hasRawTextSupport())
- OutStreamer.EmitRawText("\t.end\t" + Twine(CurrentFnSym->getName()));
-}
-
-//===----------------------------------------------------------------------===//
-void MBlazeAsmPrinter::EmitInstruction(const MachineInstr *MI) {
- MBlazeMCInstLower MCInstLowering(OutContext, *this);
-
- MCInst TmpInst;
- MCInstLowering.Lower(MI, TmpInst);
- OutStreamer.EmitInstruction(TmpInst);
-}
-
-// Print out an operand for an inline asm expression.
-bool MBlazeAsmPrinter::
-PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
- unsigned AsmVariant,const char *ExtraCode, raw_ostream &O) {
- // Does this asm operand have a single letter operand modifier?
- if (ExtraCode && ExtraCode[0])
- if (ExtraCode[1] != 0) return true; // Unknown modifier.
-
- switch (ExtraCode[0]) {
- default:
- // See if this is a generic print operand
- return AsmPrinter::PrintAsmOperand(MI, OpNo, AsmVariant, ExtraCode, O);
- }
-
- printOperand(MI, OpNo, O);
- return false;
-}
-
-void MBlazeAsmPrinter::printOperand(const MachineInstr *MI, int opNum,
- raw_ostream &O) {
- const MachineOperand &MO = MI->getOperand(opNum);
-
- switch (MO.getType()) {
- case MachineOperand::MO_Register:
- O << MBlazeInstPrinter::getRegisterName(MO.getReg());
- break;
-
- case MachineOperand::MO_Immediate:
- O << (int32_t)MO.getImm();
- break;
-
- case MachineOperand::MO_FPImmediate: {
- const ConstantFP *fp = MO.getFPImm();
- printHex32(fp->getValueAPF().bitcastToAPInt().getZExtValue(), O);
- O << ";\t# immediate = " << *fp;
- break;
- }
-
- case MachineOperand::MO_MachineBasicBlock:
- O << *MO.getMBB()->getSymbol();
- return;
-
- case MachineOperand::MO_GlobalAddress:
- O << *Mang->getSymbol(MO.getGlobal());
- break;
-
- case MachineOperand::MO_ExternalSymbol:
- O << *GetExternalSymbolSymbol(MO.getSymbolName());
- break;
-
- case MachineOperand::MO_JumpTableIndex:
- O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << MO.getIndex();
- break;
-
- case MachineOperand::MO_ConstantPoolIndex:
- O << MAI->getPrivateGlobalPrefix() << "CPI"
- << getFunctionNumber() << "_" << MO.getIndex();
- if (MO.getOffset())
- O << "+" << MO.getOffset();
- break;
-
- default:
- llvm_unreachable("<unknown operand type>");
- }
-}
-
-void MBlazeAsmPrinter::printUnsignedImm(const MachineInstr *MI, int opNum,
- raw_ostream &O) {
- const MachineOperand &MO = MI->getOperand(opNum);
- if (MO.isImm())
- O << (uint32_t)MO.getImm();
- else
- printOperand(MI, opNum, O);
-}
-
-void MBlazeAsmPrinter::printFSLImm(const MachineInstr *MI, int opNum,
- raw_ostream &O) {
- const MachineOperand &MO = MI->getOperand(opNum);
- if (MO.isImm())
- O << "rfsl" << (unsigned int)MO.getImm();
- else
- printOperand(MI, opNum, O);
-}
-
-void MBlazeAsmPrinter::
-printMemOperand(const MachineInstr *MI, int opNum, raw_ostream &O,
- const char *Modifier) {
- printOperand(MI, opNum, O);
- O << ", ";
- printOperand(MI, opNum+1, O);
-}
-
-/// isBlockOnlyReachableByFallthough - Return true if the basic block has
-/// exactly one predecessor and the control transfer mechanism between
-/// the predecessor and this block is a fall-through.
-bool MBlazeAsmPrinter::
-isBlockOnlyReachableByFallthrough(const MachineBasicBlock *MBB) const {
- // If this is a landing pad, it isn't a fall through. If it has no preds,
- // then nothing falls through to it.
- if (MBB->isLandingPad() || MBB->pred_empty())
- return false;
-
- // If there isn't exactly one predecessor, it can't be a fall through.
- MachineBasicBlock::const_pred_iterator PI = MBB->pred_begin(), PI2 = PI;
- ++PI2;
- if (PI2 != MBB->pred_end())
- return false;
-
- // The predecessor has to be immediately before this block.
- const MachineBasicBlock *Pred = *PI;
-
- if (!Pred->isLayoutSuccessor(MBB))
- return false;
-
- // If the block is completely empty, then it definitely does fall through.
- if (Pred->empty())
- return true;
-
- // Check if the last terminator is an unconditional branch.
- MachineBasicBlock::const_iterator I = Pred->end();
- while (I != Pred->begin() && !(--I)->isTerminator())
- ; // Noop
- return I == Pred->end() || !I->isBarrier();
-}
-
-// Force static initialization.
-extern "C" void LLVMInitializeMBlazeAsmPrinter() {
- RegisterAsmPrinter<MBlazeAsmPrinter> X(TheMBlazeTarget);
-}
OpenPOWER on IntegriCloud