//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
+#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/CodeGen/GCMetadataPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFrameInfo.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/IOManip.h"
-#include "llvm/Support/Mangler.h"
-#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/FormattedStream.h"
#include <cerrno>
using namespace llvm;
-static cl::opt<cl::boolOrDefault>
-AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
- cl::init(cl::BOU_UNSET));
-
-static cl::opt<cl::boolOrDefault>
-AsmExuberant("asm-exuberant", cl::desc("Add many comments."),
- cl::init(cl::BOU_FALSE));
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
char AsmPrinter::ID = 0;
AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
- const TargetAsmInfo *T, bool VDef)
- : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
- TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
-
- OutContext(*new MCContext()),
- OutStreamer(*createAsmStreamer(OutContext, O, *T, this)),
-
- LastMI(0), LastFn(0), Counter(~0U),
- PrevDLT(0, ~0U, ~0U) {
+ MCContext &Ctx, MCStreamer &Streamer,
+ const MCAsmInfo *T)
+ : MachineFunctionPass(&ID), O(o),
+ TM(tm), MAI(T), TRI(tm.getRegisterInfo()),
+ OutContext(Ctx), OutStreamer(Streamer),
+ LastMI(0), LastFn(0), Counter(~0U), PrevDLT(NULL) {
DW = 0; MMI = 0;
- switch (AsmVerbose) {
- case cl::BOU_UNSET: VerboseAsm = VDef; break;
- case cl::BOU_TRUE: VerboseAsm = true; break;
- case cl::BOU_FALSE: VerboseAsm = false; break;
- }
- switch (AsmExuberant) {
- case cl::BOU_UNSET: ExuberantAsm = false; break;
- case cl::BOU_TRUE: ExuberantAsm = true; break;
- case cl::BOU_FALSE: ExuberantAsm = false; break;
- }
+ VerboseAsm = Streamer.isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
delete &OutContext;
}
-TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
- return TM.getTargetLowering()->getObjFileLowering();
+/// getFunctionNumber - Return a unique ID for the current function.
+///
+unsigned AsmPrinter::getFunctionNumber() const {
+ return MF->getFunctionNumber();
}
-/// SwitchToSection - Switch to the specified section of the executable if we
-/// are not already in it!
-void AsmPrinter::SwitchToSection(const MCSection *NS) {
- assert(NS != 0 && "Must specify a section to switch to");
- OutStreamer.SwitchSection(NS);
+TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
+ return TM.getTargetLowering()->getObjFileLowering();
}
/// getCurrentSection() - Return the current section we are emitting to.
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
AU.addRequired<GCModuleInfo>();
- if (ExuberantAsm)
+ if (VerboseAsm)
AU.addRequired<MachineLoopInfo>();
}
const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
.Initialize(OutContext, TM);
- Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix(),
- TAI->getLinkerPrivateGlobalPrefix());
-
- if (TAI->doesAllowQuotesInName())
- Mang->setUseQuotes(true);
+ Mang = new Mangler(*MAI);
- GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
- assert(MI && "AsmPrinter didn't require GCModuleInfo?");
-
- if (TAI->hasSingleParameterDotFile()) {
- /* Very minimal debug info. It is ignored if we emit actual
- debug info. If we don't, this at helps the user find where
- a function came from. */
- O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
+ // Allow the target to emit any magic that it wants at the start of the file.
+ EmitStartOfAsmFile(M);
+
+ // Very minimal debug info. It is ignored if we emit actual debug info. If we
+ // don't, this at least helps the user find where a global came from.
+ if (MAI->hasSingleParameterDotFile()) {
+ // .file "foo.c"
+ OutStreamer.EmitFileDirective(M.getModuleIdentifier());
}
+ GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
+ assert(MI && "AsmPrinter didn't require GCModuleInfo?");
for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
- MP->beginAssembly(O, *this, *TAI);
+ MP->beginAssembly(O, *this, *MAI);
if (!M.getModuleInlineAsm().empty())
- O << TAI->getCommentString() << " Start of file scope inline assembly\n"
+ O << MAI->getCommentString() << " Start of file scope inline assembly\n"
<< M.getModuleInlineAsm()
- << '\n' << TAI->getCommentString()
+ << '\n' << MAI->getCommentString()
<< " End of file scope inline assembly\n";
- if (TAI->doesSupportDebugInformation() ||
- TAI->doesSupportExceptionHandling()) {
- MMI = getAnalysisIfAvailable<MachineModuleInfo>();
- if (MMI)
- MMI->AnalyzeModule(M);
- DW = getAnalysisIfAvailable<DwarfWriter>();
- if (DW)
- DW->BeginModule(&M, MMI, O, this, TAI);
- }
+ MMI = getAnalysisIfAvailable<MachineModuleInfo>();
+ if (MMI)
+ MMI->AnalyzeModule(M);
+ DW = getAnalysisIfAvailable<DwarfWriter>();
+ if (DW)
+ DW->BeginModule(&M, MMI, O, this, MAI);
return false;
}
+void AsmPrinter::EmitLinkage(unsigned Linkage, MCSymbol *GVSym) const {
+ switch ((GlobalValue::LinkageTypes)Linkage) {
+ case GlobalValue::CommonLinkage:
+ case GlobalValue::LinkOnceAnyLinkage:
+ case GlobalValue::LinkOnceODRLinkage:
+ case GlobalValue::WeakAnyLinkage:
+ case GlobalValue::WeakODRLinkage:
+ case GlobalValue::LinkerPrivateLinkage:
+ if (MAI->getWeakDefDirective() != 0) {
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ // .weak_definition _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_WeakDefinition);
+ } else if (const char *LinkOnce = MAI->getLinkOnceDirective()) {
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ // FIXME: linkonce should be a section attribute, handled by COFF Section
+ // assignment.
+ // http://sourceware.org/binutils/docs-2.20/as/Linkonce.html#Linkonce
+ // .linkonce discard
+ // FIXME: It would be nice to use .linkonce samesize for non-common
+ // globals.
+ O << LinkOnce;
+ } else {
+ // .weak _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Weak);
+ }
+ 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.
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ break;
+ case GlobalValue::PrivateLinkage:
+ case GlobalValue::InternalLinkage:
+ break;
+ default:
+ llvm_unreachable("Unknown linkage type!");
+ }
+}
+
+
+/// EmitGlobalVariable - Emit the specified global variable to the .s file.
+void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
+ if (!GV->hasInitializer()) // External globals require no code.
+ return;
+
+ // Check to see if this is a special global used by LLVM, if so, emit it.
+ if (EmitSpecialLLVMGlobal(GV))
+ return;
+
+ MCSymbol *GVSym = GetGlobalValueSymbol(GV);
+ EmitVisibility(GVSym, GV->getVisibility());
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
+
+ SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);
+
+ const TargetData *TD = TM.getTargetData();
+ unsigned Size = TD->getTypeAllocSize(GV->getType()->getElementType());
+ unsigned AlignLog = TD->getPreferredAlignmentLog(GV);
+
+ // Handle common and BSS local symbols (.lcomm).
+ if (GVKind.isCommon() || GVKind.isBSSLocal()) {
+ if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
+
+ if (VerboseAsm) {
+ WriteAsOperand(OutStreamer.GetCommentOS(), GV,
+ /*PrintType=*/false, GV->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+
+ // Handle common symbols.
+ if (GVKind.isCommon()) {
+ // .comm _foo, 42, 4
+ OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ // Handle local BSS symbols.
+ if (MAI->hasMachoZeroFillDirective()) {
+ const MCSection *TheSection =
+ getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
+ // .zerofill __DATA, __bss, _foo, 400, 5
+ OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ if (MAI->hasLCOMMDirective()) {
+ // .lcomm _foo, 42
+ OutStreamer.EmitLocalCommonSymbol(GVSym, Size);
+ return;
+ }
+
+ // .local _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Local);
+ // .comm _foo, 42, 4
+ OutStreamer.EmitCommonSymbol(GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ const MCSection *TheSection =
+ getObjFileLowering().SectionForGlobal(GV, GVKind, Mang, TM);
+
+ // Handle the zerofill directive on darwin, which is a special form of BSS
+ // emission.
+ if (GVKind.isBSSExtern() && MAI->hasMachoZeroFillDirective()) {
+ // .globl _foo
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_Global);
+ // .zerofill __DATA, __common, _foo, 400, 5
+ OutStreamer.EmitZerofill(TheSection, GVSym, Size, 1 << AlignLog);
+ return;
+ }
+
+ OutStreamer.SwitchSection(TheSection);
+
+ EmitLinkage(GV->getLinkage(), GVSym);
+ EmitAlignment(AlignLog, GV);
+
+ if (VerboseAsm) {
+ WriteAsOperand(OutStreamer.GetCommentOS(), GV,
+ /*PrintType=*/false, GV->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+ OutStreamer.EmitLabel(GVSym);
+
+ EmitGlobalConstant(GV->getInitializer());
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ // .size foo, 42
+ OutStreamer.EmitELFSize(GVSym, MCConstantExpr::Create(Size, OutContext));
+
+ OutStreamer.AddBlankLine();
+}
+
+/// EmitFunctionHeader - This method emits the header for the current
+/// function.
+void AsmPrinter::EmitFunctionHeader() {
+ // Print out constants referenced by the function
+ EmitConstantPool();
+
+ // Print the 'header' of function.
+ const Function *F = MF->getFunction();
+
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+ EmitVisibility(CurrentFnSym, F->getVisibility());
+
+ EmitLinkage(F->getLinkage(), CurrentFnSym);
+ EmitAlignment(MF->getAlignment(), F);
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ OutStreamer.EmitSymbolAttribute(CurrentFnSym, MCSA_ELF_TypeFunction);
+
+ if (VerboseAsm) {
+ WriteAsOperand(OutStreamer.GetCommentOS(), F,
+ /*PrintType=*/false, F->getParent());
+ OutStreamer.GetCommentOS() << '\n';
+ }
+
+ // Emit the CurrentFnSym. This is is a virtual function to allow targets to
+ // do their wild and crazy things as required.
+ EmitFunctionEntryLabel();
+
+ // Add some workaround for linkonce linkage on Cygwin\MinGW.
+ if (MAI->getLinkOnceDirective() != 0 &&
+ (F->hasLinkOnceLinkage() || F->hasWeakLinkage()))
+ // FIXME: What is this?
+ O << "Lllvm$workaround$fake$stub$" << *CurrentFnSym << ":\n";
+
+ // Emit pre-function debug and/or EH information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->BeginFunction(MF);
+}
+
+/// EmitFunctionEntryLabel - Emit the label that is the entrypoint for the
+/// function. This can be overridden by targets as required to do custom stuff.
+void AsmPrinter::EmitFunctionEntryLabel() {
+ OutStreamer.EmitLabel(CurrentFnSym);
+}
+
+
+/// EmitFunctionBody - This method emits the body and trailer for a
+/// function.
+void AsmPrinter::EmitFunctionBody() {
+ // Emit target-specific gunk before the function body.
+ EmitFunctionBodyStart();
+
+ // Print out code for the function.
+ bool HasAnyRealCode = false;
+ for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
+ I != E; ++I) {
+ // Print a label for the basic block.
+ EmitBasicBlockStart(I);
+ for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
+ II != IE; ++II) {
+ // Print the assembly for the instruction.
+ if (!II->isLabel())
+ HasAnyRealCode = true;
+
+ ++EmittedInsts;
+
+ // FIXME: Clean up processDebugLoc.
+ processDebugLoc(II, true);
+
+ switch (II->getOpcode()) {
+ case TargetOpcode::DBG_LABEL:
+ case TargetOpcode::EH_LABEL:
+ case TargetOpcode::GC_LABEL:
+ printLabelInst(II);
+ break;
+ case TargetOpcode::INLINEASM:
+ printInlineAsm(II);
+ break;
+ case TargetOpcode::IMPLICIT_DEF:
+ printImplicitDef(II);
+ break;
+ case TargetOpcode::KILL:
+ printKill(II);
+ break;
+ default:
+ EmitInstruction(II);
+ break;
+ }
+ if (VerboseAsm)
+ EmitComments(*II);
+
+ // FIXME: Clean up processDebugLoc.
+ processDebugLoc(II, false);
+ }
+ }
+
+ // If the function is empty and the object file uses .subsections_via_symbols,
+ // then we need to emit *something* to the function body to prevent the
+ // labels from collapsing together. Just emit a 0 byte.
+ if (MAI->hasSubsectionsViaSymbols() && !HasAnyRealCode)
+ OutStreamer.EmitIntValue(0, 1, 0/*addrspace*/);
+
+ // Emit target-specific gunk after the function body.
+ EmitFunctionBodyEnd();
+
+ if (MAI->hasDotTypeDotSizeDirective())
+ O << "\t.size\t" << *CurrentFnSym << ", .-" << *CurrentFnSym << '\n';
+
+ // Emit post-function debug information.
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
+ DW->EndFunction(MF);
+
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo();
+
+ OutStreamer.AddBlankLine();
+}
+
+
bool AsmPrinter::doFinalization(Module &M) {
// Emit global variables.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I)
- PrintGlobalVariable(I);
+ EmitGlobalVariable(I);
// Emit final debug information.
- if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
+ if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
DW->EndModule();
// If the target wants to know about weak references, print them all.
- if (TAI->getWeakRefDirective()) {
+ if (MAI->getWeakRefDirective()) {
// FIXME: This is not lazy, it would be nice to only print weak references
// to stuff that is actually used. Note that doing so would require targets
// to notice uses in operands (due to constant exprs etc). This should
// Print out module-level global variables here.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
- if (I->hasExternalWeakLinkage())
- O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
+ if (!I->hasExternalWeakLinkage()) continue;
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(I),
+ MCSA_WeakReference);
}
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
- if (I->hasExternalWeakLinkage())
- O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
+ if (!I->hasExternalWeakLinkage()) continue;
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(I),
+ MCSA_WeakReference);
}
}
- if (TAI->getSetDirective()) {
- O << '\n';
+ if (MAI->hasSetDirective()) {
+ OutStreamer.AddBlankLine();
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
- std::string Name = Mang->getMangledName(I);
+ MCSymbol *Name = GetGlobalValueSymbol(I);
const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
- std::string Target = Mang->getMangledName(GV);
+ MCSymbol *Target = GetGlobalValueSymbol(GV);
- if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
- O << "\t.globl\t" << Name << '\n';
+ if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
+ OutStreamer.EmitSymbolAttribute(Name, MCSA_Global);
else if (I->hasWeakLinkage())
- O << TAI->getWeakRefDirective() << Name << '\n';
- else if (!I->hasLocalLinkage())
- llvm_unreachable("Invalid alias linkage");
+ OutStreamer.EmitSymbolAttribute(Name, MCSA_WeakReference);
+ else
+ assert(I->hasLocalLinkage() && "Invalid alias linkage");
- printVisibility(Name, I->getVisibility());
+ EmitVisibility(Name, I->getVisibility());
- O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
+ // Emit the directives as assignments aka .set:
+ OutStreamer.EmitAssignment(Name,
+ MCSymbolRefExpr::Create(Target, OutContext));
}
}
assert(MI && "AsmPrinter didn't require GCModuleInfo?");
for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
- MP->finishAssembly(O, *this, *TAI);
+ MP->finishAssembly(O, *this, *MAI);
// If we don't have any trampolines, then we don't require stack memory
// to be executable. Some targets have a directive to declare this.
Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
- if (TAI->getNonexecutableStackDirective())
- O << TAI->getNonexecutableStackDirective() << '\n';
-
+ if (MCSection *S = MAI->getNonexecutableStackSection(OutContext))
+ OutStreamer.SwitchSection(S);
+
+ // Allow the target to emit any magic that it wants at the end of the file,
+ // after everything else has gone out.
+ EmitEndOfAsmFile(M);
+
delete Mang; Mang = 0;
DW = 0; MMI = 0;
return false;
}
-std::string
-AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
- assert(MF && "No machine function?");
- return Mang->getMangledName(MF->getFunction(), ".eh",
- TAI->is_EHSymbolPrivate());
-}
-
void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
- // What's my mangled name?
- CurrentFnName = Mang->getMangledName(MF.getFunction());
- IncrementFunctionNumber();
+ this->MF = &MF;
+ // Get the function symbol.
+ CurrentFnSym = GetGlobalValueSymbol(MF.getFunction());
- if (ExuberantAsm) {
+ if (VerboseAsm)
LI = &getAnalysis<MachineLoopInfo>();
- }
}
namespace {
const MCSection *S;
unsigned Alignment;
SmallVector<unsigned, 4> CPEs;
- SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {};
+ SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {}
};
}
/// used to print out constants which have been "spilled to memory" by
/// the code generator.
///
-void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
+void AsmPrinter::EmitConstantPool() {
+ const MachineConstantPool *MCP = MF->getConstantPool();
const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
if (CP.empty()) return;
// Now print stuff into the calculated sections.
for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
- SwitchToSection(CPSections[i].S);
+ OutStreamer.SwitchSection(CPSections[i].S);
EmitAlignment(Log2_32(CPSections[i].Alignment));
unsigned Offset = 0;
// Emit inter-object padding for alignment.
unsigned AlignMask = CPE.getAlignment() - 1;
unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
- EmitZeros(NewOffset - Offset);
+ OutStreamer.EmitFill(NewOffset - Offset, 0/*fillval*/, 0/*addrspace*/);
const Type *Ty = CPE.getType();
Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
- O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
- << CPI << ':';
+ // Emit the label with a comment on it.
if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " constant ";
- WriteTypeSymbolic(O, CPE.getType(), MF->getFunction()->getParent());
+ OutStreamer.GetCommentOS() << "constant pool ";
+ WriteTypeSymbolic(OutStreamer.GetCommentOS(), CPE.getType(),
+ MF->getFunction()->getParent());
+ OutStreamer.GetCommentOS() << '\n';
}
- O << '\n';
+ OutStreamer.EmitLabel(GetCPISymbol(CPI));
+
if (CPE.isMachineConstantPoolEntry())
EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
else
/// EmitJumpTableInfo - Print assembly representations of the jump tables used
/// by the current function to the current output stream.
///
-void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
- MachineFunction &MF) {
+void AsmPrinter::EmitJumpTableInfo() {
+ const MachineJumpTableInfo *MJTI = MF->getJumpTableInfo();
+ if (MJTI == 0) return;
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty()) return;
- bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
-
// Pick the directive to use to print the jump table entries, and switch to
// the appropriate section.
- TargetLowering *LoweringInfo = TM.getTargetLowering();
-
- const Function *F = MF.getFunction();
+ const Function *F = MF->getFunction();
bool JTInDiffSection = false;
- if (F->isWeakForLinker() ||
- (IsPic && !LoweringInfo->usesGlobalOffsetTable())) {
- // In PIC mode, we need to emit the jump table to the same section as the
- // function body itself, otherwise the label differences won't make sense.
- // We should also do if the section name is NULL or function is declared in
- // discardable section.
- SwitchToSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
+ if (// In PIC mode, we need to emit the jump table to the same section as the
+ // function body itself, otherwise the label differences won't make sense.
+ // FIXME: Need a better predicate for this: what about custom entries?
+ MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 ||
+ // We should also do if the section name is NULL or function is declared
+ // in discardable section
+ // FIXME: this isn't the right predicate, should be based on the MCSection
+ // for the function.
+ F->isWeakForLinker()) {
+ OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F,Mang,TM));
} else {
// Otherwise, drop it in the readonly section.
const MCSection *ReadOnlySection =
getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly());
- SwitchToSection(ReadOnlySection);
+ OutStreamer.SwitchSection(ReadOnlySection);
JTInDiffSection = true;
}
+
+ EmitAlignment(Log2_32(MJTI->getEntryAlignment(*TM.getTargetData())));
- EmitAlignment(Log2_32(MJTI->getAlignment()));
-
- for (unsigned i = 0, e = JT.size(); i != e; ++i) {
- const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
+ for (unsigned JTI = 0, e = JT.size(); JTI != e; ++JTI) {
+ const std::vector<MachineBasicBlock*> &JTBBs = JT[JTI].MBBs;
// If this jump table was deleted, ignore it.
if (JTBBs.empty()) continue;
- // For PIC codegen, if possible we want to use the SetDirective to reduce
- // the number of relocations the assembler will generate for the jump table.
- // Set directives are all printed before the jump table itself.
- SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
- if (TAI->getSetDirective() && IsPic)
- for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
- if (EmittedSets.insert(JTBBs[ii]))
- printPICJumpTableSetLabel(i, JTBBs[ii]);
+ // For the EK_LabelDifference32 entry, if the target supports .set, emit a
+ // .set directive for each unique entry. This reduces the number of
+ // relocations the assembler will generate for the jump table.
+ if (MJTI->getEntryKind() == MachineJumpTableInfo::EK_LabelDifference32 &&
+ MAI->hasSetDirective()) {
+ SmallPtrSet<const MachineBasicBlock*, 16> EmittedSets;
+ const TargetLowering *TLI = TM.getTargetLowering();
+ const MCExpr *Base = TLI->getPICJumpTableRelocBaseExpr(MF,JTI,OutContext);
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
+ const MachineBasicBlock *MBB = JTBBs[ii];
+ if (!EmittedSets.insert(MBB)) continue;
+
+ // .set LJTSet, LBB32-base
+ const MCExpr *LHS =
+ MCSymbolRefExpr::Create(MBB->getSymbol(OutContext), OutContext);
+ OutStreamer.EmitAssignment(GetJTSetSymbol(JTI, MBB->getNumber()),
+ MCBinaryExpr::CreateSub(LHS, Base, OutContext));
+ }
+ }
- // On some targets (e.g. darwin) we want to emit two consequtive labels
+ // On some targets (e.g. Darwin) we want to emit two consequtive labels
// before each jump table. The first label is never referenced, but tells
// the assembler and linker the extents of the jump table object. The
// second label is actually referenced by the code.
- if (JTInDiffSection) {
- if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
- O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
- }
-
- O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << i << ":\n";
-
- for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
- printPICJumpTableEntry(MJTI, JTBBs[ii], i);
- O << '\n';
- }
+ if (JTInDiffSection && MAI->getLinkerPrivateGlobalPrefix()[0])
+ // FIXME: This doesn't have to have any specific name, just any randomly
+ // named and numbered 'l' label would work. Simplify GetJTISymbol.
+ OutStreamer.EmitLabel(GetJTISymbol(JTI, true));
+
+ OutStreamer.EmitLabel(GetJTISymbol(JTI));
+
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
+ EmitJumpTableEntry(MJTI, JTBBs[ii], JTI);
}
}
-void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
- const MachineBasicBlock *MBB,
- unsigned uid) const {
- bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
-
- // Use JumpTableDirective otherwise honor the entry size from the jump table
- // info.
- const char *JTEntryDirective = TAI->getJumpTableDirective(isPIC);
- bool HadJTEntryDirective = JTEntryDirective != NULL;
- if (!HadJTEntryDirective) {
- JTEntryDirective = MJTI->getEntrySize() == 4 ?
- TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
+/// EmitJumpTableEntry - Emit a jump table entry for the specified MBB to the
+/// current stream.
+void AsmPrinter::EmitJumpTableEntry(const MachineJumpTableInfo *MJTI,
+ const MachineBasicBlock *MBB,
+ unsigned UID) const {
+ const MCExpr *Value = 0;
+ switch (MJTI->getEntryKind()) {
+ case MachineJumpTableInfo::EK_Custom32:
+ Value = TM.getTargetLowering()->LowerCustomJumpTableEntry(MJTI, MBB, UID,
+ OutContext);
+ break;
+ case MachineJumpTableInfo::EK_BlockAddress:
+ // EK_BlockAddress - Each entry is a plain address of block, e.g.:
+ // .word LBB123
+ Value = MCSymbolRefExpr::Create(MBB->getSymbol(OutContext), OutContext);
+ break;
+ case MachineJumpTableInfo::EK_GPRel32BlockAddress: {
+ // EK_GPRel32BlockAddress - Each entry is an address of block, encoded
+ // with a relocation as gp-relative, e.g.:
+ // .gprel32 LBB123
+ MCSymbol *MBBSym = MBB->getSymbol(OutContext);
+ OutStreamer.EmitGPRel32Value(MCSymbolRefExpr::Create(MBBSym, OutContext));
+ return;
}
- O << JTEntryDirective << ' ';
-
- // If we have emitted set directives for the jump table entries, print
- // them rather than the entries themselves. If we're emitting PIC, then
- // emit the table entries as differences between two text section labels.
- // If we're emitting non-PIC code, then emit the entries as direct
- // references to the target basic blocks.
- if (!isPIC) {
- printBasicBlockLabel(MBB, false, false, false);
- } else if (TAI->getSetDirective()) {
- O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
- << '_' << uid << "_set_" << MBB->getNumber();
- } else {
- printBasicBlockLabel(MBB, false, false, false);
- // If the arch uses custom Jump Table directives, don't calc relative to
- // JT
- if (!HadJTEntryDirective)
- O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
- << getFunctionNumber() << '_' << uid;
+ case MachineJumpTableInfo::EK_LabelDifference32: {
+ // EK_LabelDifference32 - Each entry is the address of the block minus
+ // the address of the jump table. This is used for PIC jump tables where
+ // gprel32 is not supported. e.g.:
+ // .word LBB123 - LJTI1_2
+ // If the .set directive is supported, this is emitted as:
+ // .set L4_5_set_123, LBB123 - LJTI1_2
+ // .word L4_5_set_123
+
+ // If we have emitted set directives for the jump table entries, print
+ // them rather than the entries themselves. If we're emitting PIC, then
+ // emit the table entries as differences between two text section labels.
+ if (MAI->hasSetDirective()) {
+ // If we used .set, reference the .set's symbol.
+ Value = MCSymbolRefExpr::Create(GetJTSetSymbol(UID, MBB->getNumber()),
+ OutContext);
+ break;
+ }
+ // Otherwise, use the difference as the jump table entry.
+ Value = MCSymbolRefExpr::Create(MBB->getSymbol(OutContext), OutContext);
+ const MCExpr *JTI = MCSymbolRefExpr::Create(GetJTISymbol(UID), OutContext);
+ Value = MCBinaryExpr::CreateSub(Value, JTI, OutContext);
+ break;
+ }
}
+
+ assert(Value && "Unknown entry kind!");
+
+ unsigned EntrySize = MJTI->getEntrySize(*TM.getTargetData());
+ OutStreamer.EmitValue(Value, EntrySize, /*addrspace*/0);
}
/// do nothing and return false.
bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
if (GV->getName() == "llvm.used") {
- if (TAI->getUsedDirective() != 0) // No need to emit this at all.
+ if (MAI->hasNoDeadStrip()) // No need to emit this at all.
EmitLLVMUsedList(GV->getInitializer());
return true;
}
const TargetData *TD = TM.getTargetData();
unsigned Align = Log2_32(TD->getPointerPrefAlignment());
if (GV->getName() == "llvm.global_ctors") {
- SwitchToSection(getObjFileLowering().getStaticCtorSection());
+ OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection());
EmitAlignment(Align, 0);
EmitXXStructorList(GV->getInitializer());
+
+ if (TM.getRelocationModel() == Reloc::Static &&
+ MAI->hasStaticCtorDtorReferenceInStaticMode()) {
+ StringRef Sym(".constructors_used");
+ OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
+ MCSA_Reference);
+ }
return true;
}
if (GV->getName() == "llvm.global_dtors") {
- SwitchToSection(getObjFileLowering().getStaticDtorSection());
+ OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection());
EmitAlignment(Align, 0);
EmitXXStructorList(GV->getInitializer());
+
+ if (TM.getRelocationModel() == Reloc::Static &&
+ MAI->hasStaticCtorDtorReferenceInStaticMode()) {
+ StringRef Sym(".destructors_used");
+ OutStreamer.EmitSymbolAttribute(OutContext.GetOrCreateSymbol(Sym),
+ MCSA_Reference);
+ }
return true;
}
return false;
}
-/// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
+/// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each
/// global in the specified llvm.used list for which emitUsedDirectiveFor
/// is true, as being used with this directive.
void AsmPrinter::EmitLLVMUsedList(Constant *List) {
- const char *Directive = TAI->getUsedDirective();
-
// Should be an array of 'i8*'.
ConstantArray *InitList = dyn_cast<ConstantArray>(List);
if (InitList == 0) return;
for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
const GlobalValue *GV =
dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
- if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) {
- O << Directive;
- EmitConstantValueOnly(InitList->getOperand(i));
- O << '\n';
- }
+ if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang))
+ OutStreamer.EmitSymbolAttribute(GetGlobalValueSymbol(GV),
+ MCSA_NoDeadStrip);
}
}
}
}
-/// getGlobalLinkName - Returns the asm/link name of of the specified
-/// global variable. Should be overridden by each target asm printer to
-/// generate the appropriate value.
-const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
- std::string &LinkName) const {
- if (isa<Function>(GV)) {
- LinkName += TAI->getFunctionAddrPrefix();
- LinkName += Mang->getMangledName(GV);
- LinkName += TAI->getFunctionAddrSuffix();
- } else {
- LinkName += TAI->getGlobalVarAddrPrefix();
- LinkName += Mang->getMangledName(GV);
- LinkName += TAI->getGlobalVarAddrSuffix();
- }
-
- return LinkName;
-}
-
-/// EmitExternalGlobal - Emit the external reference to a global variable.
-/// Should be overridden if an indirect reference should be used.
-void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
- std::string GLN;
- O << getGlobalLinkName(GV, GLN);
-}
-
-
-
-//===----------------------------------------------------------------------===//
-/// LEB 128 number encoding.
-
-/// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
-/// representing an unsigned leb128 value.
-void AsmPrinter::PrintULEB128(unsigned Value) const {
- char Buffer[20];
- do {
- unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
- Value >>= 7;
- if (Value) Byte |= 0x80;
- O << "0x" << utohex_buffer(Byte, Buffer+20);
- if (Value) O << ", ";
- } while (Value);
-}
-
-/// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
-/// representing a signed leb128 value.
-void AsmPrinter::PrintSLEB128(int Value) const {
- int Sign = Value >> (8 * sizeof(Value) - 1);
- bool IsMore;
- char Buffer[20];
-
- do {
- unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
- Value >>= 7;
- IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
- if (IsMore) Byte |= 0x80;
- O << "0x" << utohex_buffer(Byte, Buffer+20);
- if (IsMore) O << ", ";
- } while (IsMore);
-}
-
//===--------------------------------------------------------------------===//
// Emission and print routines
//
-/// PrintHex - Print a value as a hexidecimal value.
-///
-void AsmPrinter::PrintHex(int Value) const {
- char Buffer[20];
- O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
-}
-
-/// EOL - Print a newline character to asm stream. If a comment is present
-/// then it will be printed first. Comments should not contain '\n'.
-void AsmPrinter::EOL() const {
- O << '\n';
-}
-
-void AsmPrinter::EOL(const std::string &Comment) const {
- if (VerboseAsm && !Comment.empty()) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << ' '
- << Comment;
- }
- O << '\n';
-}
-
-void AsmPrinter::EOL(const char* Comment) const {
- if (VerboseAsm && *Comment) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << ' '
- << Comment;
- }
- O << '\n';
-}
-
-/// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
-/// unsigned leb128 value.
-void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
- if (TAI->hasLEB128()) {
- O << "\t.uleb128\t"
- << Value;
- } else {
- O << TAI->getData8bitsDirective();
- PrintULEB128(Value);
- }
-}
-
-/// EmitSLEB128Bytes - print an assembler byte data directive to compose a
-/// signed leb128 value.
-void AsmPrinter::EmitSLEB128Bytes(int Value) const {
- if (TAI->hasLEB128()) {
- O << "\t.sleb128\t"
- << Value;
- } else {
- O << TAI->getData8bitsDirective();
- PrintSLEB128(Value);
- }
-}
-
/// EmitInt8 - Emit a byte directive and value.
///
void AsmPrinter::EmitInt8(int Value) const {
- O << TAI->getData8bitsDirective();
- PrintHex(Value & 0xFF);
+ OutStreamer.EmitIntValue(Value, 1, 0/*addrspace*/);
}
/// EmitInt16 - Emit a short directive and value.
///
void AsmPrinter::EmitInt16(int Value) const {
- O << TAI->getData16bitsDirective();
- PrintHex(Value & 0xFFFF);
+ OutStreamer.EmitIntValue(Value, 2, 0/*addrspace*/);
}
/// EmitInt32 - Emit a long directive and value.
///
void AsmPrinter::EmitInt32(int Value) const {
- O << TAI->getData32bitsDirective();
- PrintHex(Value);
+ OutStreamer.EmitIntValue(Value, 4, 0/*addrspace*/);
}
/// EmitInt64 - Emit a long long directive and value.
///
void AsmPrinter::EmitInt64(uint64_t Value) const {
- if (TAI->getData64bitsDirective()) {
- O << TAI->getData64bitsDirective();
- PrintHex(Value);
- } else {
- if (TM.getTargetData()->isBigEndian()) {
- EmitInt32(unsigned(Value >> 32)); O << '\n';
- EmitInt32(unsigned(Value));
- } else {
- EmitInt32(unsigned(Value)); O << '\n';
- EmitInt32(unsigned(Value >> 32));
- }
- }
+ OutStreamer.EmitIntValue(Value, 8, 0/*addrspace*/);
}
-/// toOctal - Convert the low order bits of X into an octal digit.
-///
-static inline char toOctal(int X) {
- return (X&7)+'0';
-}
-
-/// printStringChar - Print a char, escaped if necessary.
-///
-static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
- if (C == '"') {
- O << "\\\"";
- } else if (C == '\\') {
- O << "\\\\";
- } else if (isprint((unsigned char)C)) {
- O << C;
- } else {
- switch(C) {
- case '\b': O << "\\b"; break;
- case '\f': O << "\\f"; break;
- case '\n': O << "\\n"; break;
- case '\r': O << "\\r"; break;
- case '\t': O << "\\t"; break;
- default:
- O << '\\';
- O << toOctal(C >> 6);
- O << toOctal(C >> 3);
- O << toOctal(C >> 0);
- break;
- }
- }
-}
-
-/// EmitString - Emit a string with quotes and a null terminator.
-/// Special characters are emitted properly.
-/// \literal (Eg. '\t') \endliteral
-void AsmPrinter::EmitString(const std::string &String) const {
- EmitString(String.c_str(), String.size());
-}
-
-void AsmPrinter::EmitString(const char *String, unsigned Size) const {
- const char* AscizDirective = TAI->getAscizDirective();
- if (AscizDirective)
- O << AscizDirective;
- else
- O << TAI->getAsciiDirective();
- O << '\"';
- for (unsigned i = 0; i < Size; ++i)
- printStringChar(O, String[i]);
- if (AscizDirective)
- O << '\"';
- else
- O << "\\0\"";
-}
-
-
-/// EmitFile - Emit a .file directive.
-void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
- O << "\t.file\t" << Number << " \"";
- for (unsigned i = 0, N = Name.size(); i < N; ++i)
- printStringChar(O, Name[i]);
- O << '\"';
-}
-
-
//===----------------------------------------------------------------------===//
// EmitAlignment - Emit an alignment directive to the specified power of
NumBits = std::max(NumBits, ForcedAlignBits);
if (NumBits == 0) return; // No need to emit alignment.
- if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
- O << TAI->getAlignDirective() << NumBits;
-
+
+ unsigned FillValue = 0;
if (getCurrentSection()->getKind().isText())
- if (unsigned FillValue = TAI->getTextAlignFillValue()) {
- O << ',';
- PrintHex(FillValue);
- }
- O << '\n';
+ FillValue = MAI->getTextAlignFillValue();
+
+ OutStreamer.EmitValueToAlignment(1 << NumBits, FillValue, 1, 0);
}
-/// EmitZeros - Emit a block of zeros.
+/// LowerConstant - Lower the specified LLVM Constant to an MCExpr.
///
-void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
- if (NumZeros) {
- if (TAI->getZeroDirective()) {
- O << TAI->getZeroDirective() << NumZeros;
- if (TAI->getZeroDirectiveSuffix())
- O << TAI->getZeroDirectiveSuffix();
- O << '\n';
- } else {
- for (; NumZeros; --NumZeros)
- O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
- }
- }
-}
-
-// Print out the specified constant, without a storage class. Only the
-// constants valid in constant expressions can occur here.
-void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
+static const MCExpr *LowerConstant(const Constant *CV, AsmPrinter &AP) {
+ MCContext &Ctx = AP.OutContext;
+
if (CV->isNullValue() || isa<UndefValue>(CV))
- O << '0';
- else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- O << CI->getZExtValue();
- } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
- // This is a constant address for a global variable or function. Use the
- // name of the variable or function as the address value, possibly
- // decorating it with GlobalVarAddrPrefix/Suffix or
- // FunctionAddrPrefix/Suffix (these all default to "" )
- if (isa<Function>(GV)) {
- O << TAI->getFunctionAddrPrefix()
- << Mang->getMangledName(GV)
- << TAI->getFunctionAddrSuffix();
- } else {
- O << TAI->getGlobalVarAddrPrefix()
- << Mang->getMangledName(GV)
- << TAI->getGlobalVarAddrSuffix();
- }
- } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
- const TargetData *TD = TM.getTargetData();
- unsigned Opcode = CE->getOpcode();
- switch (Opcode) {
- case Instruction::Trunc:
- case Instruction::ZExt:
- case Instruction::SExt:
- case Instruction::FPTrunc:
- case Instruction::FPExt:
- case Instruction::UIToFP:
- case Instruction::SIToFP:
- case Instruction::FPToUI:
- case Instruction::FPToSI:
- llvm_unreachable("FIXME: Don't support this constant cast expr");
- case Instruction::GetElementPtr: {
- // generate a symbolic expression for the byte address
- const Constant *ptrVal = CE->getOperand(0);
- SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
- if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
- idxVec.size())) {
- // Truncate/sext the offset to the pointer size.
- if (TD->getPointerSizeInBits() != 64) {
- int SExtAmount = 64-TD->getPointerSizeInBits();
- Offset = (Offset << SExtAmount) >> SExtAmount;
- }
-
- if (Offset)
- O << '(';
- EmitConstantValueOnly(ptrVal);
- if (Offset > 0)
- O << ") + " << Offset;
- else if (Offset < 0)
- O << ") - " << -Offset;
- } else {
- EmitConstantValueOnly(ptrVal);
- }
- break;
- }
- case Instruction::BitCast:
- return EmitConstantValueOnly(CE->getOperand(0));
-
- case Instruction::IntToPtr: {
- // Handle casts to pointers by changing them into casts to the appropriate
- // integer type. This promotes constant folding and simplifies this code.
- Constant *Op = CE->getOperand(0);
- Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(CV->getContext()),
- false/*ZExt*/);
- return EmitConstantValueOnly(Op);
+ return MCConstantExpr::Create(0, Ctx);
+
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
+ return MCConstantExpr::Create(CI->getZExtValue(), Ctx);
+
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
+ return MCSymbolRefExpr::Create(AP.GetGlobalValueSymbol(GV), Ctx);
+ if (const BlockAddress *BA = dyn_cast<BlockAddress>(CV))
+ return MCSymbolRefExpr::Create(AP.GetBlockAddressSymbol(BA), Ctx);
+
+ const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV);
+ if (CE == 0) {
+ llvm_unreachable("Unknown constant value to lower!");
+ return MCConstantExpr::Create(0, Ctx);
+ }
+
+ switch (CE->getOpcode()) {
+ default:
+ // If the code isn't optimized, there may be outstanding folding
+ // opportunities. Attempt to fold the expression using TargetData as a
+ // last resort before giving up.
+ if (Constant *C =
+ ConstantFoldConstantExpression(CE, AP.TM.getTargetData()))
+ if (C != CE)
+ return LowerConstant(C, AP);
+#ifndef NDEBUG
+ CE->dump();
+#endif
+ llvm_unreachable("FIXME: Don't support this constant expr");
+ case Instruction::GetElementPtr: {
+ const TargetData &TD = *AP.TM.getTargetData();
+ // Generate a symbolic expression for the byte address
+ const Constant *PtrVal = CE->getOperand(0);
+ SmallVector<Value*, 8> IdxVec(CE->op_begin()+1, CE->op_end());
+ int64_t Offset = TD.getIndexedOffset(PtrVal->getType(), &IdxVec[0],
+ IdxVec.size());
+
+ const MCExpr *Base = LowerConstant(CE->getOperand(0), AP);
+ if (Offset == 0)
+ return Base;
+
+ // Truncate/sext the offset to the pointer size.
+ if (TD.getPointerSizeInBits() != 64) {
+ int SExtAmount = 64-TD.getPointerSizeInBits();
+ Offset = (Offset << SExtAmount) >> SExtAmount;
}
+
+ return MCBinaryExpr::CreateAdd(Base, MCConstantExpr::Create(Offset, Ctx),
+ Ctx);
+ }
+ case Instruction::Trunc:
+ // We emit the value and depend on the assembler to truncate the generated
+ // expression properly. This is important for differences between
+ // blockaddress labels. Since the two labels are in the same function, it
+ // is reasonable to treat their delta as a 32-bit value.
+ // FALL THROUGH.
+ case Instruction::BitCast:
+ return LowerConstant(CE->getOperand(0), AP);
+
+ case Instruction::IntToPtr: {
+ const TargetData &TD = *AP.TM.getTargetData();
+ // Handle casts to pointers by changing them into casts to the appropriate
+ // integer type. This promotes constant folding and simplifies this code.
+ Constant *Op = CE->getOperand(0);
+ Op = ConstantExpr::getIntegerCast(Op, TD.getIntPtrType(CV->getContext()),
+ false/*ZExt*/);
+ return LowerConstant(Op, AP);
+ }
+
+ case Instruction::PtrToInt: {
+ const TargetData &TD = *AP.TM.getTargetData();
+ // Support only foldable casts to/from pointers that can be eliminated by
+ // changing the pointer to the appropriately sized integer type.
+ Constant *Op = CE->getOperand(0);
+ const Type *Ty = CE->getType();
+
+ const MCExpr *OpExpr = LowerConstant(Op, AP);
+
+ // We can emit the pointer value into this slot if the slot is an
+ // integer slot equal to the size of the pointer.
+ if (TD.getTypeAllocSize(Ty) == TD.getTypeAllocSize(Op->getType()))
+ return OpExpr;
+
+ // Otherwise the pointer is smaller than the resultant integer, mask off
+ // the high bits so we are sure to get a proper truncation if the input is
+ // a constant expr.
+ unsigned InBits = TD.getTypeAllocSizeInBits(Op->getType());
+ const MCExpr *MaskExpr = MCConstantExpr::Create(~0ULL >> (64-InBits), Ctx);
+ return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
+ }
- case Instruction::PtrToInt: {
- // Support only foldable casts to/from pointers that can be eliminated by
- // changing the pointer to the appropriately sized integer type.
- Constant *Op = CE->getOperand(0);
- const Type *Ty = CE->getType();
-
- // We can emit the pointer value into this slot if the slot is an
- // integer slot greater or equal to the size of the pointer.
- if (TD->getTypeAllocSize(Ty) == TD->getTypeAllocSize(Op->getType()))
- return EmitConstantValueOnly(Op);
-
- O << "((";
- EmitConstantValueOnly(Op);
- APInt ptrMask =
- APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Op->getType()));
-
- SmallString<40> S;
- ptrMask.toStringUnsigned(S);
- O << ") & " << S.c_str() << ')';
- break;
- }
- case Instruction::Add:
- case Instruction::Sub:
- case Instruction::And:
- case Instruction::Or:
- case Instruction::Xor:
- O << '(';
- EmitConstantValueOnly(CE->getOperand(0));
- O << ')';
- switch (Opcode) {
- case Instruction::Add:
- O << " + ";
- break;
- case Instruction::Sub:
- O << " - ";
- break;
- case Instruction::And:
- O << " & ";
- break;
- case Instruction::Or:
- O << " | ";
- break;
- case Instruction::Xor:
- O << " ^ ";
- break;
- default:
- break;
- }
- O << '(';
- EmitConstantValueOnly(CE->getOperand(1));
- O << ')';
- break;
- default:
- llvm_unreachable("Unsupported operator!");
+ // The MC library also has a right-shift operator, but it isn't consistently
+ // signed or unsigned between different targets.
+ case Instruction::Add:
+ case Instruction::Sub:
+ case Instruction::Mul:
+ case Instruction::SDiv:
+ case Instruction::SRem:
+ case Instruction::Shl:
+ case Instruction::And:
+ case Instruction::Or:
+ case Instruction::Xor: {
+ const MCExpr *LHS = LowerConstant(CE->getOperand(0), AP);
+ const MCExpr *RHS = LowerConstant(CE->getOperand(1), AP);
+ switch (CE->getOpcode()) {
+ default: llvm_unreachable("Unknown binary operator constant cast expr");
+ case Instruction::Add: return MCBinaryExpr::CreateAdd(LHS, RHS, Ctx);
+ case Instruction::Sub: return MCBinaryExpr::CreateSub(LHS, RHS, Ctx);
+ case Instruction::Mul: return MCBinaryExpr::CreateMul(LHS, RHS, Ctx);
+ case Instruction::SDiv: return MCBinaryExpr::CreateDiv(LHS, RHS, Ctx);
+ case Instruction::SRem: return MCBinaryExpr::CreateMod(LHS, RHS, Ctx);
+ case Instruction::Shl: return MCBinaryExpr::CreateShl(LHS, RHS, Ctx);
+ case Instruction::And: return MCBinaryExpr::CreateAnd(LHS, RHS, Ctx);
+ case Instruction::Or: return MCBinaryExpr::CreateOr (LHS, RHS, Ctx);
+ case Instruction::Xor: return MCBinaryExpr::CreateXor(LHS, RHS, Ctx);
}
- } else {
- llvm_unreachable("Unknown constant value!");
}
-}
-
-/// printAsCString - Print the specified array as a C compatible string, only if
-/// the predicate isString is true.
-///
-static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
- unsigned LastElt) {
- assert(CVA->isString() && "Array is not string compatible!");
-
- O << '\"';
- for (unsigned i = 0; i != LastElt; ++i) {
- unsigned char C =
- (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
- printStringChar(O, C);
}
- O << '\"';
}
-/// EmitString - Emit a zero-byte-terminated string constant.
-///
-void AsmPrinter::EmitString(const ConstantArray *CVA) const {
- unsigned NumElts = CVA->getNumOperands();
- if (TAI->getAscizDirective() && NumElts &&
- cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
- O << TAI->getAscizDirective();
- printAsCString(O, CVA, NumElts-1);
- } else {
- O << TAI->getAsciiDirective();
- printAsCString(O, CVA, NumElts);
+static void EmitGlobalConstantArray(const ConstantArray *CA, unsigned AddrSpace,
+ AsmPrinter &AP) {
+ if (AddrSpace != 0 || !CA->isString()) {
+ // Not a string. Print the values in successive locations
+ for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
+ AP.EmitGlobalConstant(CA->getOperand(i), AddrSpace);
+ return;
}
- O << '\n';
-}
+
+ // Otherwise, it can be emitted as .ascii.
+ SmallVector<char, 128> TmpVec;
+ TmpVec.reserve(CA->getNumOperands());
+ for (unsigned i = 0, e = CA->getNumOperands(); i != e; ++i)
+ TmpVec.push_back(cast<ConstantInt>(CA->getOperand(i))->getZExtValue());
-void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
- unsigned AddrSpace) {
- if (CVA->isString()) {
- EmitString(CVA);
- } else { // Not a string. Print the values in successive locations
- for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
- EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
- }
+ AP.OutStreamer.EmitBytes(StringRef(TmpVec.data(), TmpVec.size()), AddrSpace);
}
-void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
- const VectorType *PTy = CP->getType();
-
- for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
- EmitGlobalConstant(CP->getOperand(I));
+static void EmitGlobalConstantVector(const ConstantVector *CV,
+ unsigned AddrSpace, AsmPrinter &AP) {
+ for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
+ AP.EmitGlobalConstant(CV->getOperand(i), AddrSpace);
}
-void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
- unsigned AddrSpace) {
+static void EmitGlobalConstantStruct(const ConstantStruct *CS,
+ unsigned AddrSpace, AsmPrinter &AP) {
// Print the fields in successive locations. Pad to align if needed!
- const TargetData *TD = TM.getTargetData();
- unsigned Size = TD->getTypeAllocSize(CVS->getType());
- const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
- uint64_t sizeSoFar = 0;
- for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
- const Constant* field = CVS->getOperand(i);
+ const TargetData *TD = AP.TM.getTargetData();
+ unsigned Size = TD->getTypeAllocSize(CS->getType());
+ const StructLayout *Layout = TD->getStructLayout(CS->getType());
+ uint64_t SizeSoFar = 0;
+ for (unsigned i = 0, e = CS->getNumOperands(); i != e; ++i) {
+ const Constant *Field = CS->getOperand(i);
// Check if padding is needed and insert one or more 0s.
- uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
- uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
- - cvsLayout->getElementOffset(i)) - fieldSize;
- sizeSoFar += fieldSize + padSize;
+ uint64_t FieldSize = TD->getTypeAllocSize(Field->getType());
+ uint64_t PadSize = ((i == e-1 ? Size : Layout->getElementOffset(i+1))
+ - Layout->getElementOffset(i)) - FieldSize;
+ SizeSoFar += FieldSize + PadSize;
// Now print the actual field value.
- EmitGlobalConstant(field, AddrSpace);
+ AP.EmitGlobalConstant(Field, AddrSpace);
// Insert padding - this may include padding to increase the size of the
// current field up to the ABI size (if the struct is not packed) as well
// as padding to ensure that the next field starts at the right offset.
- EmitZeros(padSize, AddrSpace);
+ AP.OutStreamer.EmitZeros(PadSize, AddrSpace);
}
- assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
+ assert(SizeSoFar == Layout->getSizeInBytes() &&
"Layout of constant struct may be incorrect!");
}
-void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
- unsigned AddrSpace) {
+static void EmitGlobalConstantFP(const ConstantFP *CFP, unsigned AddrSpace,
+ AsmPrinter &AP) {
// FP Constants are printed as integer constants to avoid losing
- // precision...
- LLVMContext &Context = CFP->getContext();
- const TargetData *TD = TM.getTargetData();
- if (CFP->getType() == Type::getDoubleTy(Context)) {
- double Val = CFP->getValueAPF().convertToDouble(); // for comment only
- uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
- if (TAI->getData64bitsDirective(AddrSpace)) {
- O << TAI->getData64bitsDirective(AddrSpace) << i;
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " double " << Val;
- }
- O << '\n';
- } else if (TD->isBigEndian()) {
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant word of double " << Val;
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant word of double " << Val;
- }
- O << '\n';
- } else {
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant word of double " << Val;
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant word of double " << Val;
- }
- O << '\n';
+ // precision.
+ if (CFP->getType()->isDoubleTy()) {
+ if (AP.VerboseAsm) {
+ double Val = CFP->getValueAPF().convertToDouble();
+ AP.OutStreamer.GetCommentOS() << "double " << Val << '\n';
}
+
+ uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
+ AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace);
return;
- } else if (CFP->getType() == Type::getFloatTy(Context)) {
- float Val = CFP->getValueAPF().convertToFloat(); // for comment only
- O << TAI->getData32bitsDirective(AddrSpace)
- << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " float " << Val;
+ }
+
+ if (CFP->getType()->isFloatTy()) {
+ if (AP.VerboseAsm) {
+ float Val = CFP->getValueAPF().convertToFloat();
+ AP.OutStreamer.GetCommentOS() << "float " << Val << '\n';
}
- O << '\n';
+ uint64_t Val = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
+ AP.OutStreamer.EmitIntValue(Val, 4, AddrSpace);
return;
- } else if (CFP->getType() == Type::getX86_FP80Ty(Context)) {
+ }
+
+ if (CFP->getType()->isX86_FP80Ty()) {
// all long double variants are printed as hex
// api needed to prevent premature destruction
- APInt api = CFP->getValueAPF().bitcastToAPInt();
- const uint64_t *p = api.getRawData();
- // Convert to double so we can print the approximate val as a comment.
- APFloat DoubleVal = CFP->getValueAPF();
- bool ignored;
- DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
- &ignored);
- if (TD->isBigEndian()) {
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant halfword of x86_fp80 ~"
- << DoubleVal.convertToDouble();
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " next halfword";
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " next halfword";
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " next halfword";
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant halfword";
- }
- O << '\n';
- } else {
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant halfword of x86_fp80 ~"
- << DoubleVal.convertToDouble();
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next halfword";
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next halfword";
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next halfword";
- }
- O << '\n';
- O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant halfword";
- }
- O << '\n';
+ APInt API = CFP->getValueAPF().bitcastToAPInt();
+ const uint64_t *p = API.getRawData();
+ if (AP.VerboseAsm) {
+ // Convert to double so we can print the approximate val as a comment.
+ APFloat DoubleVal = CFP->getValueAPF();
+ bool ignored;
+ DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
+ &ignored);
+ AP.OutStreamer.GetCommentOS() << "x86_fp80 ~= "
+ << DoubleVal.convertToDouble() << '\n';
}
- EmitZeros(TD->getTypeAllocSize(Type::getX86_FP80Ty(Context)) -
- TD->getTypeStoreSize(Type::getX86_FP80Ty(Context)), AddrSpace);
- return;
- } else if (CFP->getType() == Type::getPPC_FP128Ty(Context)) {
- // all long double variants are printed as hex
- // api needed to prevent premature destruction
- APInt api = CFP->getValueAPF().bitcastToAPInt();
- const uint64_t *p = api.getRawData();
- if (TD->isBigEndian()) {
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant word of ppc_fp128";
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next word";
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next word";
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant word";
- }
- O << '\n';
- } else {
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant word of ppc_fp128";
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next word";
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " next word";
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant word";
- }
- O << '\n';
+
+ if (AP.TM.getTargetData()->isBigEndian()) {
+ AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace);
+ AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
+ } else {
+ AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
+ AP.OutStreamer.EmitIntValue(p[1], 2, AddrSpace);
}
+
+ // Emit the tail padding for the long double.
+ const TargetData &TD = *AP.TM.getTargetData();
+ AP.OutStreamer.EmitZeros(TD.getTypeAllocSize(CFP->getType()) -
+ TD.getTypeStoreSize(CFP->getType()), AddrSpace);
return;
- } else llvm_unreachable("Floating point constant type not handled");
+ }
+
+ assert(CFP->getType()->isPPC_FP128Ty() &&
+ "Floating point constant type not handled");
+ // All long double variants are printed as hex api needed to prevent
+ // premature destruction.
+ APInt API = CFP->getValueAPF().bitcastToAPInt();
+ const uint64_t *p = API.getRawData();
+ if (AP.TM.getTargetData()->isBigEndian()) {
+ AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
+ AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace);
+ } else {
+ AP.OutStreamer.EmitIntValue(p[1], 8, AddrSpace);
+ AP.OutStreamer.EmitIntValue(p[0], 8, AddrSpace);
+ }
}
-void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
- unsigned AddrSpace) {
- const TargetData *TD = TM.getTargetData();
+static void EmitGlobalConstantLargeInt(const ConstantInt *CI,
+ unsigned AddrSpace, AsmPrinter &AP) {
+ const TargetData *TD = AP.TM.getTargetData();
unsigned BitWidth = CI->getBitWidth();
- assert(isPowerOf2_32(BitWidth) &&
- "Non-power-of-2-sized integers not handled!");
+ assert((BitWidth & 63) == 0 && "only support multiples of 64-bits");
// We don't expect assemblers to support integer data directives
// for more than 64 bits, so we emit the data in at most 64-bit
// quantities at a time.
const uint64_t *RawData = CI->getValue().getRawData();
for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
- uint64_t Val;
- if (TD->isBigEndian())
- Val = RawData[e - i - 1];
- else
- Val = RawData[i];
-
- if (TAI->getData64bitsDirective(AddrSpace))
- O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
- else if (TD->isBigEndian()) {
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant half of i64 " << Val;
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant half of i64 " << Val;
- }
- O << '\n';
- } else {
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " least significant half of i64 " << Val;
- }
- O << '\n';
- O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString()
- << " most significant half of i64 " << Val;
- }
- O << '\n';
- }
+ uint64_t Val = TD->isBigEndian() ? RawData[e - i - 1] : RawData[i];
+ AP.OutStreamer.EmitIntValue(Val, 8, AddrSpace);
}
}
/// EmitGlobalConstant - Print a general LLVM constant to the .s file.
void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
- const TargetData *TD = TM.getTargetData();
- const Type *type = CV->getType();
- unsigned Size = TD->getTypeAllocSize(type);
+ if (isa<ConstantAggregateZero>(CV) || isa<UndefValue>(CV)) {
+ uint64_t Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ if (Size == 0) Size = 1; // An empty "_foo:" followed by a section is undef.
+ return OutStreamer.EmitZeros(Size, AddrSpace);
+ }
- if (CV->isNullValue() || isa<UndefValue>(CV)) {
- EmitZeros(Size, AddrSpace);
- return;
- } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
- EmitGlobalConstantArray(CVA , AddrSpace);
- return;
- } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
- EmitGlobalConstantStruct(CVS, AddrSpace);
- return;
- } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
- EmitGlobalConstantFP(CFP, AddrSpace);
- return;
- } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- // Small integers are handled below; large integers are handled here.
- if (Size > 4) {
- EmitGlobalConstantLargeInt(CI, AddrSpace);
+ if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
+ unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ switch (Size) {
+ case 1:
+ case 2:
+ case 4:
+ case 8:
+ if (VerboseAsm)
+ OutStreamer.GetCommentOS() << format("0x%llx\n", CI->getZExtValue());
+ OutStreamer.EmitIntValue(CI->getZExtValue(), Size, AddrSpace);
+ return;
+ default:
+ EmitGlobalConstantLargeInt(CI, AddrSpace, *this);
return;
}
- } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
- EmitGlobalConstantVector(CP);
- return;
}
+
+ if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV))
+ return EmitGlobalConstantArray(CVA, AddrSpace, *this);
+
+ if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV))
+ return EmitGlobalConstantStruct(CVS, AddrSpace, *this);
- printDataDirective(type, AddrSpace);
- EmitConstantValueOnly(CV);
- if (VerboseAsm) {
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- SmallString<40> S;
- CI->getValue().toStringUnsigned(S, 16);
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " 0x" << S.c_str();
- }
+ if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV))
+ return EmitGlobalConstantFP(CFP, AddrSpace, *this);
+
+ if (const ConstantVector *V = dyn_cast<ConstantVector>(CV))
+ return EmitGlobalConstantVector(V, AddrSpace, *this);
+
+ if (isa<ConstantPointerNull>(CV)) {
+ unsigned Size = TM.getTargetData()->getTypeAllocSize(CV->getType());
+ OutStreamer.EmitIntValue(0, Size, AddrSpace);
+ return;
}
- O << '\n';
+
+ // Otherwise, it must be a ConstantExpr. Lower it to an MCExpr, then emit it
+ // thread the streamer with EmitValue.
+ OutStreamer.EmitValue(LowerConstant(CV, *this),
+ TM.getTargetData()->getTypeAllocSize(CV->getType()),
+ AddrSpace);
}
void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
/// for their own strange codes.
void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
if (!strcmp(Code, "private")) {
- O << TAI->getPrivateGlobalPrefix();
+ O << MAI->getPrivateGlobalPrefix();
} else if (!strcmp(Code, "comment")) {
if (VerboseAsm)
- O << TAI->getCommentString();
+ O << MAI->getCommentString();
} else if (!strcmp(Code, "uid")) {
// Comparing the address of MI isn't sufficient, because machineinstrs may
// be allocated to the same address across functions.
/// processDebugLoc - Processes the debug information of each machine
/// instruction's DebugLoc.
-void AsmPrinter::processDebugLoc(DebugLoc DL) {
- if (!TAI || !DW)
+void AsmPrinter::processDebugLoc(const MachineInstr *MI,
+ bool BeforePrintingInsn) {
+ if (!MAI || !DW || !MAI->doesSupportDebugInformation()
+ || !DW->ShouldEmitDwarfDebug())
+ return;
+ DebugLoc DL = MI->getDebugLoc();
+ if (DL.isUnknown())
+ return;
+ DILocation CurDLT = MF->getDILocation(DL);
+ if (CurDLT.getScope().isNull())
return;
-
- if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
- if (!DL.isUnknown()) {
- DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
-
- if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
- printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
- DICompileUnit(CurDLT.CompileUnit)));
- PrevDLT = CurDLT;
- }
+ if (!BeforePrintingInsn) {
+ // After printing instruction
+ DW->EndScope(MI);
+ } else if (CurDLT.getNode() != PrevDLT) {
+ unsigned L = DW->RecordSourceLine(CurDLT.getLineNumber(),
+ CurDLT.getColumnNumber(),
+ CurDLT.getScope().getNode());
+ printLabel(L);
+ O << '\n';
+ DW->BeginScope(MI, L);
+ PrevDLT = CurDLT.getNode();
}
}
+
/// printInlineAsm - This method formats and prints the specified machine
/// instruction that is an inline asm.
void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
// Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
+ O << '\t';
+
// If this asmstr is empty, just print the #APP/#NOAPP markers.
// These are useful to see where empty asm's wound up.
if (AsmStr[0] == 0) {
- O << TAI->getCommentString() << TAI->getInlineAsmStart() << "\n\t";
- O << TAI->getCommentString() << TAI->getInlineAsmEnd() << '\n';
+ O << MAI->getCommentString() << MAI->getInlineAsmStart() << "\n\t";
+ O << MAI->getCommentString() << MAI->getInlineAsmEnd() << '\n';
return;
}
- O << TAI->getCommentString() << TAI->getInlineAsmStart() << "\n\t";
+ O << MAI->getCommentString() << MAI->getInlineAsmStart() << "\n\t";
// The variant of the current asmprinter.
- int AsmPrinterVariant = TAI->getAssemblerDialect();
+ int AsmPrinterVariant = MAI->getAssemblerDialect();
int CurVariant = -1; // The number of the {.|.|.} region we are in.
const char *LastEmitted = AsmStr; // One past the last character emitted.
unsigned OpFlags = MI->getOperand(OpNo).getImm();
++OpNo; // Skip over the ID number.
- if (Modifier[0]=='l') // labels are target independent
- printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
- false, false, false);
+ if (Modifier[0] == 'l') // labels are target independent
+ O << *MI->getOperand(OpNo).getMBB()->getSymbol(OutContext);
else {
AsmPrinter *AP = const_cast<AsmPrinter*>(this);
if ((OpFlags & 7) == 4) {
if (Error) {
std::string msg;
raw_string_ostream Msg(msg);
- Msg << "Invalid operand found in inline asm: '"
- << AsmStr << "'\n";
+ Msg << "Invalid operand found in inline asm: '" << AsmStr << "'\n";
MI->print(Msg);
llvm_report_error(Msg.str());
}
}
}
}
- O << "\n\t" << TAI->getCommentString() << TAI->getInlineAsmEnd() << '\n';
+ O << "\n\t" << MAI->getCommentString() << MAI->getInlineAsmEnd() << '\n';
}
/// printImplicitDef - This method prints the specified machine instruction
/// that is an implicit def.
void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
- if (VerboseAsm) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " implicit-def: "
- << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
+ if (!VerboseAsm) return;
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << " implicit-def: "
+ << TRI->getName(MI->getOperand(0).getReg()) << '\n';
+}
+
+void AsmPrinter::printKill(const MachineInstr *MI) const {
+ if (!VerboseAsm) return;
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << " kill:";
+ for (unsigned n = 0, e = MI->getNumOperands(); n != e; ++n) {
+ const MachineOperand &op = MI->getOperand(n);
+ assert(op.isReg() && "KILL instruction must have only register operands");
+ O << ' ' << TRI->getName(op.getReg()) << (op.isDef() ? "<def>" : "<kill>");
}
+ O << '\n';
}
/// printLabel - This method prints a local label used by debug and
/// exception handling tables.
-void AsmPrinter::printLabel(const MachineInstr *MI) const {
+void AsmPrinter::printLabelInst(const MachineInstr *MI) const {
printLabel(MI->getOperand(0).getImm());
+ O << '\n';
}
void AsmPrinter::printLabel(unsigned Id) const {
- O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
-}
-
-/// printDeclare - This method prints a local variable declaration used by
-/// debug tables.
-/// FIXME: It doesn't really print anything rather it inserts a DebugVariable
-/// entry into dwarf table.
-void AsmPrinter::printDeclare(const MachineInstr *MI) const {
- unsigned FI = MI->getOperand(0).getIndex();
- GlobalValue *GV = MI->getOperand(1).getGlobal();
- DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
+ O << MAI->getPrivateGlobalPrefix() << "label" << Id << ':';
}
/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
/// instruction, using the specified assembler variant. Targets should
-/// overried this to format as appropriate.
+/// override this to format as appropriate.
bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode) {
// Target doesn't support this yet!
return true;
}
-/// printBasicBlockLabel - This method prints the label for the specified
-/// MachineBasicBlock
-void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
- bool printAlign,
- bool printColon,
- bool printComment) const {
- if (printAlign) {
- unsigned Align = MBB->getAlignment();
- if (Align)
- EmitAlignment(Log2_32(Align));
- }
+MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const {
+ return GetBlockAddressSymbol(BA->getFunction(), BA->getBasicBlock());
+}
- O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
- << MBB->getNumber();
- if (printColon)
- O << ':';
- if (printComment) {
- if (const BasicBlock *BB = MBB->getBasicBlock())
- if (BB->hasName()) {
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << ' ';
- WriteAsOperand(O, BB, /*PrintType=*/false);
- }
+MCSymbol *AsmPrinter::GetBlockAddressSymbol(const Function *F,
+ const BasicBlock *BB) const {
+ assert(BB->hasName() &&
+ "Address of anonymous basic block not supported yet!");
- if (printColon)
- EmitComments(*MBB);
- }
+ // This code must use the function name itself, and not the function number,
+ // since it must be possible to generate the label name from within other
+ // functions.
+ SmallString<60> FnName;
+ Mang->getNameWithPrefix(FnName, F, false);
+
+ // FIXME: THIS IS BROKEN IF THE LLVM BASIC BLOCK DOESN'T HAVE A NAME!
+ SmallString<60> NameResult;
+ Mang->getNameWithPrefix(NameResult,
+ StringRef("BA") + Twine((unsigned)FnName.size()) +
+ "_" + FnName.str() + "_" + BB->getName(),
+ Mangler::Private);
+
+ return OutContext.GetOrCreateSymbol(NameResult.str());
}
-/// printPICJumpTableSetLabel - This method prints a set label for the
-/// specified MachineBasicBlock for a jumptable entry.
-void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
- const MachineBasicBlock *MBB) const {
- if (!TAI->getSetDirective())
- return;
-
- O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
- printBasicBlockLabel(MBB, false, false, false);
- O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '\n';
+/// GetCPISymbol - Return the symbol for the specified constant pool entry.
+MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "CPI"
+ << getFunctionNumber() << '_' << CPID;
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetJTISymbol - Return the symbol for the specified jump table entry.
+MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
+ return MF->getJTISymbol(JTID, OutContext, isLinkerPrivate);
+}
+
+/// GetJTSetSymbol - Return the symbol for the specified jump table .set
+/// FIXME: privatize to AsmPrinter.
+MCSymbol *AsmPrinter::GetJTSetSymbol(unsigned UID, unsigned MBBID) const {
+ SmallString<60> Name;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << UID << "_set_" << MBBID;
+ return OutContext.GetOrCreateSymbol(Name.str());
+}
+
+/// GetGlobalValueSymbol - Return the MCSymbol for the specified global
+/// value.
+MCSymbol *AsmPrinter::GetGlobalValueSymbol(const GlobalValue *GV) const {
+ SmallString<60> NameStr;
+ Mang->getNameWithPrefix(NameStr, GV, false);
+ return OutContext.GetOrCreateSymbol(NameStr.str());
+}
+
+/// GetSymbolWithGlobalValueBase - Return the MCSymbol for a symbol with
+/// global value name as its base, with the specified suffix, and where the
+/// symbol is forced to have private linkage if ForcePrivate is true.
+MCSymbol *AsmPrinter::GetSymbolWithGlobalValueBase(const GlobalValue *GV,
+ StringRef Suffix,
+ bool ForcePrivate) const {
+ SmallString<60> NameStr;
+ Mang->getNameWithPrefix(NameStr, GV, ForcePrivate);
+ NameStr.append(Suffix.begin(), Suffix.end());
+ return OutContext.GetOrCreateSymbol(NameStr.str());
+}
+
+/// GetExternalSymbolSymbol - Return the MCSymbol for the specified
+/// ExternalSymbol.
+MCSymbol *AsmPrinter::GetExternalSymbolSymbol(StringRef Sym) const {
+ SmallString<60> NameStr;
+ Mang->getNameWithPrefix(NameStr, Sym);
+ return OutContext.GetOrCreateSymbol(NameStr.str());
+}
+
+
+
+/// PrintParentLoopComment - Print comments about parent loops of this one.
+static void PrintParentLoopComment(raw_ostream &OS, const MachineLoop *Loop,
+ unsigned FunctionNumber) {
+ if (Loop == 0) return;
+ PrintParentLoopComment(OS, Loop->getParentLoop(), FunctionNumber);
+ OS.indent(Loop->getLoopDepth()*2)
+ << "Parent Loop BB" << FunctionNumber << "_"
+ << Loop->getHeader()->getNumber()
+ << " Depth=" << Loop->getLoopDepth() << '\n';
+}
+
+
+/// PrintChildLoopComment - Print comments about child loops within
+/// the loop for this basic block, with nesting.
+static void PrintChildLoopComment(raw_ostream &OS, const MachineLoop *Loop,
+ unsigned FunctionNumber) {
+ // Add child loop information
+ for (MachineLoop::iterator CL = Loop->begin(), E = Loop->end();CL != E; ++CL){
+ OS.indent((*CL)->getLoopDepth()*2)
+ << "Child Loop BB" << FunctionNumber << "_"
+ << (*CL)->getHeader()->getNumber() << " Depth " << (*CL)->getLoopDepth()
+ << '\n';
+ PrintChildLoopComment(OS, *CL, FunctionNumber);
+ }
}
-void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
- const MachineBasicBlock *MBB) const {
- if (!TAI->getSetDirective())
+/// PrintBasicBlockLoopComments - Pretty-print comments for basic blocks.
+static void PrintBasicBlockLoopComments(const MachineBasicBlock &MBB,
+ const MachineLoopInfo *LI,
+ const AsmPrinter &AP) {
+ // Add loop depth information
+ const MachineLoop *Loop = LI->getLoopFor(&MBB);
+ if (Loop == 0) return;
+
+ MachineBasicBlock *Header = Loop->getHeader();
+ assert(Header && "No header for loop");
+
+ // If this block is not a loop header, just print out what is the loop header
+ // and return.
+ if (Header != &MBB) {
+ AP.OutStreamer.AddComment(" in Loop: Header=BB" +
+ Twine(AP.getFunctionNumber())+"_" +
+ Twine(Loop->getHeader()->getNumber())+
+ " Depth="+Twine(Loop->getLoopDepth()));
return;
+ }
+
+ // Otherwise, it is a loop header. Print out information about child and
+ // parent loops.
+ raw_ostream &OS = AP.OutStreamer.GetCommentOS();
+
+ PrintParentLoopComment(OS, Loop->getParentLoop(), AP.getFunctionNumber());
+
+ OS << "=>";
+ OS.indent(Loop->getLoopDepth()*2-2);
+
+ OS << "This ";
+ if (Loop->empty())
+ OS << "Inner ";
+ OS << "Loop Header: Depth=" + Twine(Loop->getLoopDepth()) << '\n';
- O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << '_' << uid2
- << "_set_" << MBB->getNumber() << ',';
- printBasicBlockLabel(MBB, false, false, false);
- O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '_' << uid2 << '\n';
+ PrintChildLoopComment(OS, Loop, AP.getFunctionNumber());
}
-/// printDataDirective - This method prints the asm directive for the
-/// specified type.
-void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
- const TargetData *TD = TM.getTargetData();
- switch (type->getTypeID()) {
- case Type::FloatTyID: case Type::DoubleTyID:
- case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
- assert(0 && "Should have already output floating point constant.");
- default:
- assert(0 && "Can't handle printing this type of thing");
- case Type::IntegerTyID: {
- unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
- if (BitWidth <= 8)
- O << TAI->getData8bitsDirective(AddrSpace);
- else if (BitWidth <= 16)
- O << TAI->getData16bitsDirective(AddrSpace);
- else if (BitWidth <= 32)
- O << TAI->getData32bitsDirective(AddrSpace);
- else if (BitWidth <= 64) {
- assert(TAI->getData64bitsDirective(AddrSpace) &&
- "Target cannot handle 64-bit constant exprs!");
- O << TAI->getData64bitsDirective(AddrSpace);
- } else {
- llvm_unreachable("Target cannot handle given data directive width!");
- }
- break;
+
+/// EmitBasicBlockStart - This method prints the label for the specified
+/// MachineBasicBlock, an alignment (if present) and a comment describing
+/// it if appropriate.
+void AsmPrinter::EmitBasicBlockStart(const MachineBasicBlock *MBB) const {
+ // Emit an alignment directive for this block, if needed.
+ if (unsigned Align = MBB->getAlignment())
+ EmitAlignment(Log2_32(Align));
+
+ // If the block has its address taken, emit a special label to satisfy
+ // references to the block. This is done so that we don't need to
+ // remember the number of this label, and so that we can make
+ // forward references to labels without knowing what their numbers
+ // will be.
+ if (MBB->hasAddressTaken()) {
+ const BasicBlock *BB = MBB->getBasicBlock();
+ if (VerboseAsm)
+ OutStreamer.AddComment("Address Taken");
+ OutStreamer.EmitLabel(GetBlockAddressSymbol(BB->getParent(), BB));
}
- case Type::PointerTyID:
- if (TD->getPointerSize() == 8) {
- assert(TAI->getData64bitsDirective(AddrSpace) &&
- "Target cannot handle 64-bit pointer exprs!");
- O << TAI->getData64bitsDirective(AddrSpace);
- } else if (TD->getPointerSize() == 2) {
- O << TAI->getData16bitsDirective(AddrSpace);
- } else if (TD->getPointerSize() == 1) {
- O << TAI->getData8bitsDirective(AddrSpace);
- } else {
- O << TAI->getData32bitsDirective(AddrSpace);
+
+ // Print the main label for the block.
+ if (MBB->pred_empty() || MBB->isOnlyReachableByFallthrough()) {
+ if (VerboseAsm) {
+ // NOTE: Want this comment at start of line.
+ O << MAI->getCommentString() << " BB#" << MBB->getNumber() << ':';
+ if (const BasicBlock *BB = MBB->getBasicBlock())
+ if (BB->hasName())
+ OutStreamer.AddComment("%" + BB->getName());
+
+ PrintBasicBlockLoopComments(*MBB, LI, *this);
+ OutStreamer.AddBlankLine();
}
- break;
+ } else {
+ if (VerboseAsm) {
+ if (const BasicBlock *BB = MBB->getBasicBlock())
+ if (BB->hasName())
+ OutStreamer.AddComment("%" + BB->getName());
+ PrintBasicBlockLoopComments(*MBB, LI, *this);
+ }
+
+ OutStreamer.EmitLabel(MBB->getSymbol(OutContext));
}
}
-void AsmPrinter::printVisibility(const std::string& Name,
- unsigned Visibility) const {
- if (Visibility == GlobalValue::HiddenVisibility) {
- if (const char *Directive = TAI->getHiddenDirective())
- O << Directive << Name << '\n';
- } else if (Visibility == GlobalValue::ProtectedVisibility) {
- if (const char *Directive = TAI->getProtectedDirective())
- O << Directive << Name << '\n';
+void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility) const {
+ MCSymbolAttr Attr = MCSA_Invalid;
+
+ switch (Visibility) {
+ default: break;
+ case GlobalValue::HiddenVisibility:
+ Attr = MAI->getHiddenVisibilityAttr();
+ break;
+ case GlobalValue::ProtectedVisibility:
+ Attr = MAI->getProtectedVisibilityAttr();
+ break;
}
+
+ if (Attr != MCSA_Invalid)
+ OutStreamer.EmitSymbolAttribute(Sym, Attr);
}
void AsmPrinter::printOffset(int64_t Offset) const {
O << Offset;
}
-void AsmPrinter::printMCInst(const MCInst *MI) {
- llvm_unreachable("MCInst printing unavailable on this target!");
-}
-
GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
if (!S->usesMetadata())
return 0;
return GMP;
}
- cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
- llvm_unreachable(0);
+ llvm_report_error("no GCMetadataPrinter registered for GC: " + Twine(Name));
+ return 0;
}
/// EmitComments - Pretty-print comments for instructions
void AsmPrinter::EmitComments(const MachineInstr &MI) const {
- if (!VerboseAsm ||
- MI.getDebugLoc().isUnknown())
+ if (!VerboseAsm)
return;
-
- DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
-
- // Print source line info.
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " SrcLine ";
- if (DLT.CompileUnit->hasInitializer()) {
- Constant *Name = DLT.CompileUnit->getInitializer();
- if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
- if (NameString->isString())
- O << NameString->getAsString() << " ";
- }
- O << DLT.Line;
- if (DLT.Col != 0)
- O << ":" << DLT.Col;
-}
-/// EmitComments - Pretty-print comments for instructions
-void AsmPrinter::EmitComments(const MCInst &MI) const
-{
- if (VerboseAsm) {
- if (!MI.getDebugLoc().isUnknown()) {
- DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
-
- // Print source line info
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " SrcLine ";
- if (DLT.CompileUnit->hasInitializer()) {
- Constant *Name = DLT.CompileUnit->getInitializer();
- if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
- if (NameString->isString()) {
- O << NameString->getAsString() << " ";
- }
- }
- O << DLT.Line;
- if (DLT.Col != 0)
- O << ":" << DLT.Col;
- }
- }
-}
+ if (!MI.getDebugLoc().isUnknown()) {
+ DILocation DLT = MF->getDILocation(MI.getDebugLoc());
-/// EmitComments - Pretty-print comments for basic blocks
-void AsmPrinter::EmitComments(const MachineBasicBlock &MBB) const
-{
- if (ExuberantAsm) {
- // Add loop depth information
- const MachineLoop *loop = LI->getLoopFor(&MBB);
-
- if (loop) {
- // Print a newline after bb# annotation.
- O << "\n";
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " Loop Depth " << loop->getLoopDepth()
- << '\n';
-
- O.PadToColumn(TAI->getCommentColumn());
+ // Print source line info.
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' ';
+ DIScope Scope = DLT.getScope();
+ // Omit the directory, because it's likely to be long and uninteresting.
+ if (!Scope.isNull())
+ O << Scope.getFilename();
+ else
+ O << "<unknown>";
+ O << ':' << DLT.getLineNumber();
+ if (DLT.getColumnNumber() != 0)
+ O << ':' << DLT.getColumnNumber();
+ O << '\n';
+ }
- MachineBasicBlock *Header = loop->getHeader();
- assert(Header && "No header for loop");
-
- if (Header == &MBB) {
- O << TAI->getCommentString() << " Loop Header";
- PrintChildLoopComment(loop);
- }
- else {
- O << TAI->getCommentString() << " Loop Header is BB"
- << getFunctionNumber() << "_" << loop->getHeader()->getNumber();
- }
+ // Check for spills and reloads
+ int FI;
- if (loop->empty()) {
- O << '\n';
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << " Inner Loop";
- }
+ const MachineFrameInfo *FrameInfo =
+ MI.getParent()->getParent()->getFrameInfo();
- // Add parent loop information
- for (const MachineLoop *CurLoop = loop->getParentLoop();
- CurLoop;
- CurLoop = CurLoop->getParentLoop()) {
- MachineBasicBlock *Header = CurLoop->getHeader();
- assert(Header && "No header for loop");
-
- O << '\n';
- O.PadToColumn(TAI->getCommentColumn());
- O << TAI->getCommentString() << Indent(CurLoop->getLoopDepth()-1)
- << " Inside Loop BB" << getFunctionNumber() << "_"
- << Header->getNumber() << " Depth " << CurLoop->getLoopDepth();
- }
+ // We assume a single instruction only has a spill or reload, not
+ // both.
+ const MachineMemOperand *MMO;
+ if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) {
+ if (FrameInfo->isSpillSlotObjectIndex(FI)) {
+ MMO = *MI.memoperands_begin();
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' ' << MMO->getSize() << "-byte Reload\n";
+ }
+ }
+ else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) {
+ if (FrameInfo->isSpillSlotObjectIndex(FI)) {
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' '
+ << MMO->getSize() << "-byte Folded Reload\n";
+ }
+ }
+ else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) {
+ if (FrameInfo->isSpillSlotObjectIndex(FI)) {
+ MMO = *MI.memoperands_begin();
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' ' << MMO->getSize() << "-byte Spill\n";
+ }
+ }
+ else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) {
+ if (FrameInfo->isSpillSlotObjectIndex(FI)) {
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << ' '
+ << MMO->getSize() << "-byte Folded Spill\n";
}
}
-}
-
-void AsmPrinter::PrintChildLoopComment(const MachineLoop *loop) const {
- // Add child loop information
- for(MachineLoop::iterator cl = loop->begin(),
- clend = loop->end();
- cl != clend;
- ++cl) {
- MachineBasicBlock *Header = (*cl)->getHeader();
- assert(Header && "No header for loop");
-
- O << '\n';
- O.PadToColumn(TAI->getCommentColumn());
-
- O << TAI->getCommentString() << Indent((*cl)->getLoopDepth()-1)
- << " Child Loop BB" << getFunctionNumber() << "_"
- << Header->getNumber() << " Depth " << (*cl)->getLoopDepth();
- PrintChildLoopComment(*cl);
+ // Check for spill-induced copies
+ unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
+ if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg,
+ SrcSubIdx, DstSubIdx)) {
+ if (MI.getAsmPrinterFlag(ReloadReuse)) {
+ O.PadToColumn(MAI->getCommentColumn());
+ O << MAI->getCommentString() << " Reload Reuse\n";
+ }
}
}
+