mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-01 04:29:57 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75416 91177308-0d34-0410-b5e6-96231b3b80d8
1064 lines
34 KiB
C++
1064 lines
34 KiB
C++
//===-- X86ATTAsmPrinter.cpp - Convert X86 LLVM code to AT&T assembly -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to AT&T format assembly
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// language. This printer is the output mechanism used by `llc'.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "asm-printer"
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#include "X86ATTAsmPrinter.h"
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#include "X86.h"
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#include "X86COFF.h"
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#include "X86MachineFunctionInfo.h"
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#include "X86TargetMachine.h"
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#include "X86TargetAsmInfo.h"
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#include "llvm/CallingConv.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/MDNode.h"
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#include "llvm/Type.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/CodeGen/DwarfWriter.h"
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#include "llvm/CodeGen/MachineJumpTableInfo.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetAsmInfo.h"
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#include "llvm/Target/TargetOptions.h"
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using namespace llvm;
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STATISTIC(EmittedInsts, "Number of machine instrs printed");
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static cl::opt<bool> NewAsmPrinter("experimental-asm-printer",
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cl::Hidden);
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//===----------------------------------------------------------------------===//
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// Primitive Helper Functions.
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//===----------------------------------------------------------------------===//
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void X86ATTAsmPrinter::PrintPICBaseSymbol() const {
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if (Subtarget->isTargetDarwin())
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O << "\"L" << getFunctionNumber() << "$pb\"";
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else if (Subtarget->isTargetELF())
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O << ".Lllvm$" << getFunctionNumber() << ".$piclabel";
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else
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LLVM_UNREACHABLE( "Don't know how to print PIC label!");
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}
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/// PrintUnmangledNameSafely - Print out the printable characters in the name.
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/// Don't print things like \\n or \\0.
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static void PrintUnmangledNameSafely(const Value *V, raw_ostream &OS) {
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for (const char *Name = V->getNameStart(), *E = Name+V->getNameLen();
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Name != E; ++Name)
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if (isprint(*Name))
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OS << *Name;
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}
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static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
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const TargetData *TD) {
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X86MachineFunctionInfo Info;
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uint64_t Size = 0;
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switch (F->getCallingConv()) {
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case CallingConv::X86_StdCall:
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Info.setDecorationStyle(StdCall);
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break;
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case CallingConv::X86_FastCall:
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Info.setDecorationStyle(FastCall);
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break;
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default:
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return Info;
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}
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unsigned argNum = 1;
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for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
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AI != AE; ++AI, ++argNum) {
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const Type* Ty = AI->getType();
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// 'Dereference' type in case of byval parameter attribute
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if (F->paramHasAttr(argNum, Attribute::ByVal))
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Ty = cast<PointerType>(Ty)->getElementType();
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// Size should be aligned to DWORD boundary
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Size += ((TD->getTypeAllocSize(Ty) + 3)/4)*4;
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}
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// We're not supporting tooooo huge arguments :)
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Info.setBytesToPopOnReturn((unsigned int)Size);
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return Info;
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}
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/// decorateName - Query FunctionInfoMap and use this information for various
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/// name decoration.
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void X86ATTAsmPrinter::decorateName(std::string &Name,
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const GlobalValue *GV) {
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const Function *F = dyn_cast<Function>(GV);
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if (!F) return;
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// Save function name for later type emission.
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if (Subtarget->isTargetCygMing() && F->isDeclaration())
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CygMingStubs.insert(Name);
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// We don't want to decorate non-stdcall or non-fastcall functions right now
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unsigned CC = F->getCallingConv();
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if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
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return;
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// Decorate names only when we're targeting Cygwin/Mingw32 targets
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if (!Subtarget->isTargetCygMing())
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return;
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FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
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const X86MachineFunctionInfo *Info;
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if (info_item == FunctionInfoMap.end()) {
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// Calculate apropriate function info and populate map
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FunctionInfoMap[F] = calculateFunctionInfo(F, TM.getTargetData());
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Info = &FunctionInfoMap[F];
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} else {
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Info = &info_item->second;
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}
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const FunctionType *FT = F->getFunctionType();
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switch (Info->getDecorationStyle()) {
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case None:
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break;
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case StdCall:
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// "Pure" variadic functions do not receive @0 suffix.
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if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
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(FT->getNumParams() == 1 && F->hasStructRetAttr()))
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Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
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break;
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case FastCall:
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// "Pure" variadic functions do not receive @0 suffix.
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if (!FT->isVarArg() || (FT->getNumParams() == 0) ||
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(FT->getNumParams() == 1 && F->hasStructRetAttr()))
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Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
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if (Name[0] == '_') {
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Name[0] = '@';
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} else {
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Name = '@' + Name;
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}
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break;
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default:
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LLVM_UNREACHABLE( "Unsupported DecorationStyle");
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}
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}
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void X86ATTAsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
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unsigned FnAlign = MF.getAlignment();
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const Function *F = MF.getFunction();
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decorateName(CurrentFnName, F);
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SwitchToSection(TAI->SectionForGlobal(F));
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switch (F->getLinkage()) {
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default: LLVM_UNREACHABLE( "Unknown linkage type!");
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case Function::InternalLinkage: // Symbols default to internal.
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case Function::PrivateLinkage:
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EmitAlignment(FnAlign, F);
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break;
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case Function::DLLExportLinkage:
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case Function::ExternalLinkage:
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EmitAlignment(FnAlign, F);
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O << "\t.globl\t" << CurrentFnName << '\n';
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break;
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case Function::LinkOnceAnyLinkage:
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case Function::LinkOnceODRLinkage:
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case Function::WeakAnyLinkage:
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case Function::WeakODRLinkage:
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EmitAlignment(FnAlign, F);
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if (Subtarget->isTargetDarwin()) {
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O << "\t.globl\t" << CurrentFnName << '\n';
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O << TAI->getWeakDefDirective() << CurrentFnName << '\n';
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} else if (Subtarget->isTargetCygMing()) {
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O << "\t.globl\t" << CurrentFnName << "\n"
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"\t.linkonce discard\n";
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} else {
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O << "\t.weak\t" << CurrentFnName << '\n';
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}
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break;
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}
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printVisibility(CurrentFnName, F->getVisibility());
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if (Subtarget->isTargetELF())
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O << "\t.type\t" << CurrentFnName << ",@function\n";
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else if (Subtarget->isTargetCygMing()) {
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O << "\t.def\t " << CurrentFnName
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<< ";\t.scl\t" <<
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(F->hasInternalLinkage() ? COFF::C_STAT : COFF::C_EXT)
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<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
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<< ";\t.endef\n";
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}
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O << CurrentFnName << ":\n";
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// Add some workaround for linkonce linkage on Cygwin\MinGW
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if (Subtarget->isTargetCygMing() &&
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(F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
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O << "Lllvm$workaround$fake$stub$" << CurrentFnName << ":\n";
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}
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/// runOnMachineFunction - This uses the printMachineInstruction()
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/// method to print assembly for each instruction.
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///
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bool X86ATTAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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const Function *F = MF.getFunction();
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this->MF = &MF;
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unsigned CC = F->getCallingConv();
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SetupMachineFunction(MF);
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O << "\n\n";
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// Populate function information map. Actually, We don't want to populate
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// non-stdcall or non-fastcall functions' information right now.
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if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
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FunctionInfoMap[F] = *MF.getInfo<X86MachineFunctionInfo>();
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// Print out constants referenced by the function
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EmitConstantPool(MF.getConstantPool());
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if (F->hasDLLExportLinkage())
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DLLExportedFns.insert(Mang->makeNameProper(F->getName(), ""));
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// Print the 'header' of function
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emitFunctionHeader(MF);
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// Emit pre-function debug and/or EH information.
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if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
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DW->BeginFunction(&MF);
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// Print out code for the function.
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bool hasAnyRealCode = false;
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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// Print a label for the basic block.
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if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
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// This is an entry block or a block that's only reachable via a
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// fallthrough edge. In non-VerboseAsm mode, don't print the label.
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} else {
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printBasicBlockLabel(I, true, true, VerboseAsm);
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O << '\n';
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}
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for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
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II != IE; ++II) {
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// Print the assembly for the instruction.
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if (!II->isLabel())
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hasAnyRealCode = true;
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printMachineInstruction(II);
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}
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}
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if (Subtarget->isTargetDarwin() && !hasAnyRealCode) {
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// If the function is empty, then we need to emit *something*. Otherwise,
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// the function's label might be associated with something that it wasn't
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// meant to be associated with. We emit a noop in this situation.
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// We are assuming inline asms are code.
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O << "\tnop\n";
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}
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if (TAI->hasDotTypeDotSizeDirective())
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O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
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// Emit post-function debug information.
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if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
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DW->EndFunction(&MF);
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// Print out jump tables referenced by the function.
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EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
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O.flush();
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// We didn't modify anything.
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return false;
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}
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/// print_pcrel_imm - This is used to print an immediate value that ends up
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/// being encoded as a pc-relative value. These print slightly differently, for
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/// example, a $ is not emitted.
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void X86ATTAsmPrinter::print_pcrel_imm(const MachineInstr *MI, unsigned OpNo) {
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const MachineOperand &MO = MI->getOperand(OpNo);
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switch (MO.getType()) {
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default: LLVM_UNREACHABLE( "Unknown pcrel immediate operand");
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case MachineOperand::MO_Immediate:
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O << MO.getImm();
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return;
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case MachineOperand::MO_MachineBasicBlock:
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printBasicBlockLabel(MO.getMBB(), false, false, VerboseAsm);
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return;
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case MachineOperand::MO_GlobalAddress: {
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const GlobalValue *GV = MO.getGlobal();
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std::string Name = Mang->getValueName(GV);
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decorateName(Name, GV);
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bool needCloseParen = false;
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if (Name[0] == '$') {
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// The name begins with a dollar-sign. In order to avoid having it look
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// like an integer immediate to the assembler, enclose it in parens.
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O << '(';
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needCloseParen = true;
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}
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// Handle dllimport linkage.
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if (MO.getTargetFlags() == X86II::MO_DLLIMPORT)
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O << "__imp_" << Name;
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else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
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FnStubs.insert(Name);
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printSuffixedName(Name, "$stub");
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} else {
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O << Name;
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}
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if (needCloseParen)
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O << ')';
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// Assemble call via PLT for externally visible symbols.
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if (MO.getTargetFlags() == X86II::MO_PLT)
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O << "@PLT";
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printOffset(MO.getOffset());
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return;
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}
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case MachineOperand::MO_ExternalSymbol: {
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bool needCloseParen = false;
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std::string Name(TAI->getGlobalPrefix());
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Name += MO.getSymbolName();
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if (Name[0] == '$') {
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// The name begins with a dollar-sign. In order to avoid having it look
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// like an integer immediate to the assembler, enclose it in parens.
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O << '(';
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needCloseParen = true;
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}
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if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
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FnStubs.insert(Name);
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printSuffixedName(Name, "$stub");
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} else {
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O << Name;
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}
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if (MO.getTargetFlags() == X86II::MO_GOT_ABSOLUTE_ADDRESS) {
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O << " + [.-";
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PrintPICBaseSymbol();
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O << ']';
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}
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if (MO.getTargetFlags() == X86II::MO_PLT)
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O << "@PLT";
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if (needCloseParen)
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O << ')';
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return;
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}
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}
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}
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void X86ATTAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
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const char *Modifier) {
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const MachineOperand &MO = MI->getOperand(OpNo);
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switch (MO.getType()) {
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default: LLVM_UNREACHABLE( "unknown operand type!");
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case MachineOperand::MO_Register: {
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assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
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"Virtual registers should not make it this far!");
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O << '%';
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unsigned Reg = MO.getReg();
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if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
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MVT VT = (strcmp(Modifier+6,"64") == 0) ?
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MVT::i64 : ((strcmp(Modifier+6, "32") == 0) ? MVT::i32 :
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((strcmp(Modifier+6,"16") == 0) ? MVT::i16 : MVT::i8));
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Reg = getX86SubSuperRegister(Reg, VT);
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}
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O << TRI->getAsmName(Reg);
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return;
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}
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case MachineOperand::MO_Immediate:
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if (!Modifier || strcmp(Modifier, "mem"))
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O << '$';
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O << MO.getImm();
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return;
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case MachineOperand::MO_JumpTableIndex: {
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bool isMemOp = Modifier && !strcmp(Modifier, "mem");
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if (!isMemOp) O << '$';
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O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_'
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<< MO.getIndex();
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break;
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}
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case MachineOperand::MO_ConstantPoolIndex: {
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bool isMemOp = Modifier && !strcmp(Modifier, "mem");
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if (!isMemOp) O << '$';
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O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
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<< MO.getIndex();
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printOffset(MO.getOffset());
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break;
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}
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case MachineOperand::MO_GlobalAddress: {
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bool isMemOp = Modifier && !strcmp(Modifier, "mem");
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if (!isMemOp)
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O << '$';
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const GlobalValue *GV = MO.getGlobal();
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std::string Name = Mang->getValueName(GV);
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decorateName(Name, GV);
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bool needCloseParen = false;
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if (Name[0] == '$') {
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// The name begins with a dollar-sign. In order to avoid having it look
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// like an integer immediate to the assembler, enclose it in parens.
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O << '(';
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needCloseParen = true;
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}
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// Handle dllimport linkage.
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if (MO.getTargetFlags() == X86II::MO_DLLIMPORT) {
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O << "__imp_" << Name;
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY ||
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MO.getTargetFlags() == X86II::MO_DARWIN_NONLAZY_PIC_BASE) {
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GVStubs.insert(Name);
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printSuffixedName(Name, "$non_lazy_ptr");
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY ||
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MO.getTargetFlags() == X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE){
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HiddenGVStubs.insert(Name);
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printSuffixedName(Name, "$non_lazy_ptr");
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} else if (MO.getTargetFlags() == X86II::MO_DARWIN_STUB) {
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FnStubs.insert(Name);
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printSuffixedName(Name, "$stub");
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} else {
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O << Name;
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}
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if (needCloseParen)
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O << ')';
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// Assemble call via PLT for externally visible symbols.
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if (MO.getTargetFlags() == X86II::MO_PLT)
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O << "@PLT";
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printOffset(MO.getOffset());
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break;
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}
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case MachineOperand::MO_ExternalSymbol:
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/// NOTE: MO_ExternalSymbol in a non-pcrel_imm context is *only* generated
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/// by _GLOBAL_OFFSET_TABLE_ on X86-32. All others are call operands, which
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/// are pcrel_imm's.
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assert(!Subtarget->is64Bit());
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// These are never used as memory operands.
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assert(Modifier == 0 || strcmp(Modifier, "mem"));
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O << '$';
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O << TAI->getGlobalPrefix();
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O << MO.getSymbolName();
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break;
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}
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switch (MO.getTargetFlags()) {
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default:
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LLVM_UNREACHABLE( "Unknown target flag on GV operand");
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case X86II::MO_NO_FLAG: // No flag.
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break;
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case X86II::MO_DARWIN_NONLAZY:
|
|
case X86II::MO_DARWIN_HIDDEN_NONLAZY:
|
|
case X86II::MO_DLLIMPORT:
|
|
// These affect the name of the symbol, not any suffix.
|
|
break;
|
|
case X86II::MO_GOT_ABSOLUTE_ADDRESS:
|
|
O << " + [.-";
|
|
PrintPICBaseSymbol();
|
|
O << ']';
|
|
break;
|
|
case X86II::MO_PIC_BASE_OFFSET:
|
|
case X86II::MO_DARWIN_NONLAZY_PIC_BASE:
|
|
case X86II::MO_DARWIN_HIDDEN_NONLAZY_PIC_BASE:
|
|
O << '-';
|
|
PrintPICBaseSymbol();
|
|
break;
|
|
case X86II::MO_TLSGD: O << "@TLSGD"; break;
|
|
case X86II::MO_GOTTPOFF: O << "@GOTTPOFF"; break;
|
|
case X86II::MO_INDNTPOFF: O << "@INDNTPOFF"; break;
|
|
case X86II::MO_TPOFF: O << "@TPOFF"; break;
|
|
case X86II::MO_NTPOFF: O << "@NTPOFF"; break;
|
|
case X86II::MO_GOTPCREL: O << "@GOTPCREL"; break;
|
|
case X86II::MO_GOT: O << "@GOT"; break;
|
|
case X86II::MO_GOTOFF: O << "@GOTOFF"; break;
|
|
}
|
|
}
|
|
|
|
void X86ATTAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
|
|
unsigned char value = MI->getOperand(Op).getImm();
|
|
assert(value <= 7 && "Invalid ssecc argument!");
|
|
switch (value) {
|
|
case 0: O << "eq"; break;
|
|
case 1: O << "lt"; break;
|
|
case 2: O << "le"; break;
|
|
case 3: O << "unord"; break;
|
|
case 4: O << "neq"; break;
|
|
case 5: O << "nlt"; break;
|
|
case 6: O << "nle"; break;
|
|
case 7: O << "ord"; break;
|
|
}
|
|
}
|
|
|
|
void X86ATTAsmPrinter::printLeaMemReference(const MachineInstr *MI, unsigned Op,
|
|
const char *Modifier) {
|
|
const MachineOperand &BaseReg = MI->getOperand(Op);
|
|
const MachineOperand &IndexReg = MI->getOperand(Op+2);
|
|
const MachineOperand &DispSpec = MI->getOperand(Op+3);
|
|
|
|
// If we really don't want to print out (rip), don't.
|
|
bool HasBaseReg = BaseReg.getReg() != 0;
|
|
if (HasBaseReg && Modifier && !strcmp(Modifier, "no-rip") &&
|
|
BaseReg.getReg() == X86::RIP)
|
|
HasBaseReg = false;
|
|
|
|
// HasParenPart - True if we will print out the () part of the mem ref.
|
|
bool HasParenPart = IndexReg.getReg() || HasBaseReg;
|
|
|
|
if (DispSpec.isImm()) {
|
|
int DispVal = DispSpec.getImm();
|
|
if (DispVal || !HasParenPart)
|
|
O << DispVal;
|
|
} else {
|
|
assert(DispSpec.isGlobal() || DispSpec.isCPI() ||
|
|
DispSpec.isJTI() || DispSpec.isSymbol());
|
|
printOperand(MI, Op+3, "mem");
|
|
}
|
|
|
|
if (HasParenPart) {
|
|
assert(IndexReg.getReg() != X86::ESP &&
|
|
"X86 doesn't allow scaling by ESP");
|
|
|
|
O << '(';
|
|
if (HasBaseReg)
|
|
printOperand(MI, Op, Modifier);
|
|
|
|
if (IndexReg.getReg()) {
|
|
O << ',';
|
|
printOperand(MI, Op+2, Modifier);
|
|
unsigned ScaleVal = MI->getOperand(Op+1).getImm();
|
|
if (ScaleVal != 1)
|
|
O << ',' << ScaleVal;
|
|
}
|
|
O << ')';
|
|
}
|
|
}
|
|
|
|
void X86ATTAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
|
|
const char *Modifier) {
|
|
assert(isMem(MI, Op) && "Invalid memory reference!");
|
|
const MachineOperand &Segment = MI->getOperand(Op+4);
|
|
if (Segment.getReg()) {
|
|
printOperand(MI, Op+4, Modifier);
|
|
O << ':';
|
|
}
|
|
printLeaMemReference(MI, Op, Modifier);
|
|
}
|
|
|
|
void X86ATTAsmPrinter::printPICJumpTableSetLabel(unsigned uid,
|
|
const MachineBasicBlock *MBB) const {
|
|
if (!TAI->getSetDirective())
|
|
return;
|
|
|
|
// We don't need .set machinery if we have GOT-style relocations
|
|
if (Subtarget->isPICStyleGOT())
|
|
return;
|
|
|
|
O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
|
|
<< getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
|
|
printBasicBlockLabel(MBB, false, false, false);
|
|
if (Subtarget->isPICStyleRIPRel())
|
|
O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
|
|
<< '_' << uid << '\n';
|
|
else {
|
|
O << '-';
|
|
PrintPICBaseSymbol();
|
|
O << '\n';
|
|
}
|
|
}
|
|
|
|
|
|
void X86ATTAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
|
|
PrintPICBaseSymbol();
|
|
O << '\n';
|
|
PrintPICBaseSymbol();
|
|
O << ':';
|
|
}
|
|
|
|
|
|
void X86ATTAsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
|
|
const MachineBasicBlock *MBB,
|
|
unsigned uid) const {
|
|
const char *JTEntryDirective = MJTI->getEntrySize() == 4 ?
|
|
TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
|
|
|
|
O << JTEntryDirective << ' ';
|
|
|
|
if (Subtarget->isPICStyleRIPRel() || Subtarget->isPICStyleStubPIC()) {
|
|
O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
|
|
<< '_' << uid << "_set_" << MBB->getNumber();
|
|
} else if (Subtarget->isPICStyleGOT()) {
|
|
printBasicBlockLabel(MBB, false, false, false);
|
|
O << "@GOTOFF";
|
|
} else
|
|
printBasicBlockLabel(MBB, false, false, false);
|
|
}
|
|
|
|
bool X86ATTAsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode) {
|
|
unsigned Reg = MO.getReg();
|
|
switch (Mode) {
|
|
default: return true; // Unknown mode.
|
|
case 'b': // Print QImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8);
|
|
break;
|
|
case 'h': // Print QImode high register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i8, true);
|
|
break;
|
|
case 'w': // Print HImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i16);
|
|
break;
|
|
case 'k': // Print SImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i32);
|
|
break;
|
|
case 'q': // Print DImode register
|
|
Reg = getX86SubSuperRegister(Reg, MVT::i64);
|
|
break;
|
|
}
|
|
|
|
O << '%'<< TRI->getAsmName(Reg);
|
|
return false;
|
|
}
|
|
|
|
/// PrintAsmOperand - Print out an operand for an inline asm expression.
|
|
///
|
|
bool X86ATTAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
// 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: return true; // Unknown modifier.
|
|
case 'c': // Don't print "$" before a global var name or constant.
|
|
printOperand(MI, OpNo, "mem");
|
|
return false;
|
|
|
|
case 'A': // Print '*' before a register (it must be a register)
|
|
if (MI->getOperand(OpNo).isReg()) {
|
|
O << '*';
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
}
|
|
return true;
|
|
|
|
case 'b': // Print QImode register
|
|
case 'h': // Print QImode high register
|
|
case 'w': // Print HImode register
|
|
case 'k': // Print SImode register
|
|
case 'q': // Print DImode register
|
|
if (MI->getOperand(OpNo).isReg())
|
|
return printAsmMRegister(MI->getOperand(OpNo), ExtraCode[0]);
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
|
|
case 'P': // This is the operand of a call, treat specially.
|
|
print_pcrel_imm(MI, OpNo);
|
|
return false;
|
|
|
|
case 'n': { // Negate the immediate or print a '-' before the operand.
|
|
// Note: this is a temporary solution. It should be handled target
|
|
// independently as part of the 'MC' work.
|
|
const MachineOperand &MO = MI->getOperand(OpNo);
|
|
if (MO.isImm()) {
|
|
O << -MO.getImm();
|
|
return false;
|
|
}
|
|
O << '-';
|
|
}
|
|
}
|
|
}
|
|
|
|
printOperand(MI, OpNo);
|
|
return false;
|
|
}
|
|
|
|
bool X86ATTAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
|
|
unsigned OpNo,
|
|
unsigned AsmVariant,
|
|
const char *ExtraCode) {
|
|
if (ExtraCode && ExtraCode[0]) {
|
|
if (ExtraCode[1] != 0) return true; // Unknown modifier.
|
|
|
|
switch (ExtraCode[0]) {
|
|
default: return true; // Unknown modifier.
|
|
case 'b': // Print QImode register
|
|
case 'h': // Print QImode high register
|
|
case 'w': // Print HImode register
|
|
case 'k': // Print SImode register
|
|
case 'q': // Print SImode register
|
|
// These only apply to registers, ignore on mem.
|
|
break;
|
|
case 'P': // Don't print @PLT, but do print as memory.
|
|
printMemReference(MI, OpNo, "no-rip");
|
|
return false;
|
|
}
|
|
}
|
|
printMemReference(MI, OpNo);
|
|
return false;
|
|
}
|
|
|
|
static void lower_lea64_32mem(MCInst *MI, unsigned OpNo) {
|
|
// Convert registers in the addr mode according to subreg64.
|
|
for (unsigned i = 0; i != 4; ++i) {
|
|
if (!MI->getOperand(i).isReg()) continue;
|
|
|
|
unsigned Reg = MI->getOperand(i).getReg();
|
|
if (Reg == 0) continue;
|
|
|
|
MI->getOperand(i).setReg(getX86SubSuperRegister(Reg, MVT::i64));
|
|
}
|
|
}
|
|
|
|
/// printMachineInstruction -- Print out a single X86 LLVM instruction MI in
|
|
/// AT&T syntax to the current output stream.
|
|
///
|
|
void X86ATTAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
|
|
++EmittedInsts;
|
|
|
|
if (NewAsmPrinter) {
|
|
if (MI->getOpcode() == TargetInstrInfo::INLINEASM) {
|
|
O << "\t";
|
|
printInlineAsm(MI);
|
|
return;
|
|
} else if (MI->isLabel()) {
|
|
printLabel(MI);
|
|
return;
|
|
} else if (MI->getOpcode() == TargetInstrInfo::DECLARE) {
|
|
printDeclare(MI);
|
|
return;
|
|
} else if (MI->getOpcode() == TargetInstrInfo::IMPLICIT_DEF) {
|
|
printImplicitDef(MI);
|
|
return;
|
|
}
|
|
|
|
O << "NEW: ";
|
|
MCInst TmpInst;
|
|
|
|
TmpInst.setOpcode(MI->getOpcode());
|
|
|
|
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
|
|
const MachineOperand &MO = MI->getOperand(i);
|
|
|
|
MCOperand MCOp;
|
|
if (MO.isReg()) {
|
|
MCOp.MakeReg(MO.getReg());
|
|
} else if (MO.isImm()) {
|
|
MCOp.MakeImm(MO.getImm());
|
|
} else if (MO.isMBB()) {
|
|
MCOp.MakeMBBLabel(getFunctionNumber(), MO.getMBB()->getNumber());
|
|
} else {
|
|
LLVM_UNREACHABLE( "Unimp");
|
|
}
|
|
|
|
TmpInst.addOperand(MCOp);
|
|
}
|
|
|
|
switch (TmpInst.getOpcode()) {
|
|
case X86::LEA64_32r:
|
|
// Handle the 'subreg rewriting' for the lea64_32mem operand.
|
|
lower_lea64_32mem(&TmpInst, 1);
|
|
break;
|
|
}
|
|
|
|
// FIXME: Convert TmpInst.
|
|
printInstruction(&TmpInst);
|
|
O << "OLD: ";
|
|
}
|
|
|
|
// Call the autogenerated instruction printer routines.
|
|
printInstruction(MI);
|
|
}
|
|
|
|
/// doInitialization
|
|
bool X86ATTAsmPrinter::doInitialization(Module &M) {
|
|
if (NewAsmPrinter) {
|
|
Context = new MCContext();
|
|
// FIXME: Send this to "O" instead of outs(). For now, we force it to
|
|
// stdout to make it easy to compare.
|
|
Streamer = createAsmStreamer(*Context, outs());
|
|
}
|
|
|
|
return AsmPrinter::doInitialization(M);
|
|
}
|
|
|
|
void X86ATTAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
|
|
const TargetData *TD = TM.getTargetData();
|
|
|
|
if (!GVar->hasInitializer())
|
|
return; // External global require no code
|
|
|
|
// Check to see if this is a special global used by LLVM, if so, emit it.
|
|
if (EmitSpecialLLVMGlobal(GVar)) {
|
|
if (Subtarget->isTargetDarwin() &&
|
|
TM.getRelocationModel() == Reloc::Static) {
|
|
if (GVar->getName() == "llvm.global_ctors")
|
|
O << ".reference .constructors_used\n";
|
|
else if (GVar->getName() == "llvm.global_dtors")
|
|
O << ".reference .destructors_used\n";
|
|
}
|
|
return;
|
|
}
|
|
|
|
std::string name = Mang->getValueName(GVar);
|
|
Constant *C = GVar->getInitializer();
|
|
if (isa<MDNode>(C) || isa<MDString>(C))
|
|
return;
|
|
const Type *Type = C->getType();
|
|
unsigned Size = TD->getTypeAllocSize(Type);
|
|
unsigned Align = TD->getPreferredAlignmentLog(GVar);
|
|
|
|
printVisibility(name, GVar->getVisibility());
|
|
|
|
if (Subtarget->isTargetELF())
|
|
O << "\t.type\t" << name << ",@object\n";
|
|
|
|
SwitchToSection(TAI->SectionForGlobal(GVar));
|
|
|
|
if (C->isNullValue() && !GVar->hasSection() &&
|
|
!(Subtarget->isTargetDarwin() &&
|
|
TAI->SectionKindForGlobal(GVar) == SectionKind::RODataMergeStr)) {
|
|
// FIXME: This seems to be pretty darwin-specific
|
|
if (GVar->hasExternalLinkage()) {
|
|
if (const char *Directive = TAI->getZeroFillDirective()) {
|
|
O << "\t.globl " << name << '\n';
|
|
O << Directive << "__DATA, __common, " << name << ", "
|
|
<< Size << ", " << Align << '\n';
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (!GVar->isThreadLocal() &&
|
|
(GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
|
|
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
|
|
|
|
if (TAI->getLCOMMDirective() != NULL) {
|
|
if (GVar->hasLocalLinkage()) {
|
|
O << TAI->getLCOMMDirective() << name << ',' << Size;
|
|
if (Subtarget->isTargetDarwin())
|
|
O << ',' << Align;
|
|
} else if (Subtarget->isTargetDarwin() && !GVar->hasCommonLinkage()) {
|
|
O << "\t.globl " << name << '\n'
|
|
<< TAI->getWeakDefDirective() << name << '\n';
|
|
EmitAlignment(Align, GVar);
|
|
O << name << ":";
|
|
if (VerboseAsm) {
|
|
O << "\t\t\t\t" << TAI->getCommentString() << ' ';
|
|
PrintUnmangledNameSafely(GVar, O);
|
|
}
|
|
O << '\n';
|
|
EmitGlobalConstant(C);
|
|
return;
|
|
} else {
|
|
O << TAI->getCOMMDirective() << name << ',' << Size;
|
|
if (TAI->getCOMMDirectiveTakesAlignment())
|
|
O << ',' << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
|
|
}
|
|
} else {
|
|
if (!Subtarget->isTargetCygMing()) {
|
|
if (GVar->hasLocalLinkage())
|
|
O << "\t.local\t" << name << '\n';
|
|
}
|
|
O << TAI->getCOMMDirective() << name << ',' << Size;
|
|
if (TAI->getCOMMDirectiveTakesAlignment())
|
|
O << ',' << (TAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
|
|
}
|
|
if (VerboseAsm) {
|
|
O << "\t\t" << TAI->getCommentString() << ' ';
|
|
PrintUnmangledNameSafely(GVar, O);
|
|
}
|
|
O << '\n';
|
|
return;
|
|
}
|
|
}
|
|
|
|
switch (GVar->getLinkage()) {
|
|
case GlobalValue::CommonLinkage:
|
|
case GlobalValue::LinkOnceAnyLinkage:
|
|
case GlobalValue::LinkOnceODRLinkage:
|
|
case GlobalValue::WeakAnyLinkage:
|
|
case GlobalValue::WeakODRLinkage:
|
|
if (Subtarget->isTargetDarwin()) {
|
|
O << "\t.globl " << name << '\n'
|
|
<< TAI->getWeakDefDirective() << name << '\n';
|
|
} else if (Subtarget->isTargetCygMing()) {
|
|
O << "\t.globl\t" << name << "\n"
|
|
"\t.linkonce same_size\n";
|
|
} else {
|
|
O << "\t.weak\t" << name << '\n';
|
|
}
|
|
break;
|
|
case GlobalValue::DLLExportLinkage:
|
|
case GlobalValue::AppendingLinkage:
|
|
// FIXME: appending linkage variables should go into a section of
|
|
// their name or something. For now, just emit them as external.
|
|
case GlobalValue::ExternalLinkage:
|
|
// If external or appending, declare as a global symbol
|
|
O << "\t.globl " << name << '\n';
|
|
// FALL THROUGH
|
|
case GlobalValue::PrivateLinkage:
|
|
case GlobalValue::InternalLinkage:
|
|
break;
|
|
default:
|
|
LLVM_UNREACHABLE( "Unknown linkage type!");
|
|
}
|
|
|
|
EmitAlignment(Align, GVar);
|
|
O << name << ":";
|
|
if (VerboseAsm){
|
|
O << "\t\t\t\t" << TAI->getCommentString() << ' ';
|
|
PrintUnmangledNameSafely(GVar, O);
|
|
}
|
|
O << '\n';
|
|
if (TAI->hasDotTypeDotSizeDirective())
|
|
O << "\t.size\t" << name << ", " << Size << '\n';
|
|
|
|
EmitGlobalConstant(C);
|
|
}
|
|
|
|
bool X86ATTAsmPrinter::doFinalization(Module &M) {
|
|
// Print out module-level global variables here.
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
I != E; ++I) {
|
|
printModuleLevelGV(I);
|
|
|
|
if (I->hasDLLExportLinkage())
|
|
DLLExportedGVs.insert(Mang->makeNameProper(I->getName(),""));
|
|
}
|
|
|
|
if (Subtarget->isTargetDarwin()) {
|
|
SwitchToDataSection("");
|
|
|
|
// Add the (possibly multiple) personalities to the set of global value
|
|
// stubs. Only referenced functions get into the Personalities list.
|
|
if (TAI->doesSupportExceptionHandling() && MMI && !Subtarget->is64Bit()) {
|
|
const std::vector<Function*> &Personalities = MMI->getPersonalities();
|
|
for (unsigned i = 0, e = Personalities.size(); i != e; ++i) {
|
|
if (Personalities[i] == 0)
|
|
continue;
|
|
std::string Name = Mang->getValueName(Personalities[i]);
|
|
decorateName(Name, Personalities[i]);
|
|
GVStubs.insert(Name);
|
|
}
|
|
}
|
|
|
|
// Output stubs for dynamically-linked functions
|
|
if (!FnStubs.empty()) {
|
|
for (StringSet<>::iterator I = FnStubs.begin(), E = FnStubs.end();
|
|
I != E; ++I) {
|
|
SwitchToDataSection("\t.section __IMPORT,__jump_table,symbol_stubs,"
|
|
"self_modifying_code+pure_instructions,5", 0);
|
|
const char *Name = I->getKeyData();
|
|
printSuffixedName(Name, "$stub");
|
|
O << ":\n"
|
|
"\t.indirect_symbol " << Name << "\n"
|
|
"\thlt ; hlt ; hlt ; hlt ; hlt\n";
|
|
}
|
|
O << '\n';
|
|
}
|
|
|
|
// Output stubs for external and common global variables.
|
|
if (!GVStubs.empty()) {
|
|
SwitchToDataSection(
|
|
"\t.section __IMPORT,__pointers,non_lazy_symbol_pointers");
|
|
for (StringSet<>::iterator I = GVStubs.begin(), E = GVStubs.end();
|
|
I != E; ++I) {
|
|
const char *Name = I->getKeyData();
|
|
printSuffixedName(Name, "$non_lazy_ptr");
|
|
O << ":\n\t.indirect_symbol " << Name << "\n\t.long\t0\n";
|
|
}
|
|
}
|
|
|
|
if (!HiddenGVStubs.empty()) {
|
|
SwitchToSection(TAI->getDataSection());
|
|
EmitAlignment(2);
|
|
for (StringSet<>::iterator I = HiddenGVStubs.begin(),
|
|
E = HiddenGVStubs.end(); I != E; ++I) {
|
|
const char *Name = I->getKeyData();
|
|
printSuffixedName(Name, "$non_lazy_ptr");
|
|
O << ":\n" << TAI->getData32bitsDirective() << Name << '\n';
|
|
}
|
|
}
|
|
|
|
// Funny Darwin hack: This flag tells the linker that no global symbols
|
|
// contain code that falls through to other global symbols (e.g. the obvious
|
|
// implementation of multiple entry points). If this doesn't occur, the
|
|
// linker can safely perform dead code stripping. Since LLVM never
|
|
// generates code that does this, it is always safe to set.
|
|
O << "\t.subsections_via_symbols\n";
|
|
} else if (Subtarget->isTargetCygMing()) {
|
|
// Emit type information for external functions
|
|
for (StringSet<>::iterator i = CygMingStubs.begin(), e = CygMingStubs.end();
|
|
i != e; ++i) {
|
|
O << "\t.def\t " << i->getKeyData()
|
|
<< ";\t.scl\t" << COFF::C_EXT
|
|
<< ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
|
|
<< ";\t.endef\n";
|
|
}
|
|
}
|
|
|
|
|
|
// Output linker support code for dllexported globals on windows.
|
|
if (!DLLExportedGVs.empty()) {
|
|
SwitchToDataSection(".section .drectve");
|
|
|
|
for (StringSet<>::iterator i = DLLExportedGVs.begin(),
|
|
e = DLLExportedGVs.end(); i != e; ++i)
|
|
O << "\t.ascii \" -export:" << i->getKeyData() << ",data\"\n";
|
|
}
|
|
|
|
if (!DLLExportedFns.empty()) {
|
|
SwitchToDataSection(".section .drectve");
|
|
|
|
for (StringSet<>::iterator i = DLLExportedFns.begin(),
|
|
e = DLLExportedFns.end();
|
|
i != e; ++i)
|
|
O << "\t.ascii \" -export:" << i->getKeyData() << "\"\n";
|
|
}
|
|
|
|
// Do common shutdown.
|
|
bool Changed = AsmPrinter::doFinalization(M);
|
|
|
|
if (NewAsmPrinter) {
|
|
Streamer->Finish();
|
|
|
|
delete Streamer;
|
|
delete Context;
|
|
Streamer = 0;
|
|
Context = 0;
|
|
}
|
|
|
|
return Changed;
|
|
}
|
|
|
|
// Include the auto-generated portion of the assembly writer.
|
|
#include "X86GenAsmWriter.inc"
|