//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/DerivedTypes.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
#include "llvm/CodeGen/MachineLoopInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/Analysis/ConstantFolding.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/Format.h"
-#include "llvm/Support/FormattedStream.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.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 bool getVerboseAsm(bool VDef) {
- switch (AsmVerbose) {
- default:
- case cl::BOU_UNSET: return VDef;
- case cl::BOU_TRUE: return true;
- case cl::BOU_FALSE: return false;
- }
-}
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
char AsmPrinter::ID = 0;
AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
- const MCAsmInfo *T, bool VDef)
- : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
+ MCContext &Ctx, MCStreamer &Streamer,
+ const MCAsmInfo *T)
+ : MachineFunctionPass(&ID), O(o),
TM(tm), MAI(T), TRI(tm.getRegisterInfo()),
-
- OutContext(*new MCContext()),
- // FIXME: Pass instprinter to streamer.
- OutStreamer(*createAsmStreamer(OutContext, O, *T,
- TM.getTargetData()->isLittleEndian(),
- getVerboseAsm(VDef), 0)),
-
+ OutContext(Ctx), OutStreamer(Streamer),
LastMI(0), LastFn(0), Counter(~0U), PrevDLT(NULL) {
DW = 0; MMI = 0;
- VerboseAsm = getVerboseAsm(VDef);
+ VerboseAsm = Streamer.isVerboseAsm();
}
AsmPrinter::~AsmPrinter() {
delete &OutContext;
}
+/// getFunctionNumber - Return a unique ID for the current function.
+///
+unsigned AsmPrinter::getFunctionNumber() const {
+ return MF->getFunctionNumber();
+}
+
TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
return TM.getTargetLowering()->getObjFileLowering();
}
// 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()) {
- // 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 function came from.
- O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
+ // .file "foo.c"
+ OutStreamer.EmitFileDirective(M.getModuleIdentifier());
}
GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
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;
MCSymbol *GVSym = GetGlobalValueSymbol(GV);
- printVisibility(GVSym, GV->getVisibility());
+ EmitVisibility(GVSym, GV->getVisibility());
- if (MAI->hasDotTypeDotSizeDirective()) {
- O << "\t.type\t" << *GVSym;
- if (MAI->getCommentString()[0] != '@')
- O << ",@object\n";
- else
- O << ",%object\n";
- }
+ if (MAI->hasDotTypeDotSizeDirective())
+ OutStreamer.EmitSymbolAttribute(GVSym, MCSA_ELF_TypeObject);
SectionKind GVKind = TargetLoweringObjectFile::getKindForGlobal(GV, TM);
OutStreamer.SwitchSection(TheSection);
- // TODO: Factor into an 'emit linkage' thing that is shared with function
- // bodies.
- switch (GV->getLinkage()) {
- 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);
- // .linkonce same_size
- 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!");
- }
-
+ EmitLinkage(GV->getLinkage(), GVSym);
EmitAlignment(AlignLog, GV);
+
if (VerboseAsm) {
WriteAsOperand(OutStreamer.GetCommentOS(), GV,
/*PrintType=*/false, GV->getParent());
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.
}
}
- if (MAI->getSetDirective()) {
+ if (MAI->hasSetDirective()) {
OutStreamer.AddBlankLine();
for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
I != E; ++I) {
else
assert(I->hasLocalLinkage() && "Invalid alias linkage");
- printVisibility(Name, I->getVisibility());
+ EmitVisibility(Name, I->getVisibility());
- O << MAI->getSetDirective() << ' ' << *Name << ", " << *Target << '\n';
+ // Emit the directives as assignments aka .set:
+ OutStreamer.EmitAssignment(Name,
+ MCSymbolRefExpr::Create(Target, OutContext));
}
}
}
void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
+ this->MF = &MF;
// Get the function symbol.
CurrentFnSym = GetGlobalValueSymbol(MF.getFunction());
- IncrementFunctionNumber();
if (VerboseAsm)
LI = &getAnalysis<MachineLoopInfo>();
/// 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;
/// 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.
- OutStreamer.SwitchSection(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 =
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 (MAI->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
// 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 && MAI->getLinkerPrivateGlobalPrefix()[0])
- OutStreamer.EmitLabel(GetJTISymbol(i, true));
+ // 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(i));
+ OutStreamer.EmitLabel(GetJTISymbol(JTI));
- for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
- printPICJumpTableEntry(MJTI, JTBBs[ii], i);
- O << '\n';
- }
+ 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 = MAI->getJumpTableDirective(isPIC);
- bool HadJTEntryDirective = JTEntryDirective != NULL;
- if (!HadJTEntryDirective) {
- JTEntryDirective = MJTI->getEntrySize() == 4 ?
- MAI->getData32bitsDirective() : MAI->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) {
- O << *GetMBBSymbol(MBB->getNumber());
- } else if (MAI->getSetDirective()) {
- O << MAI->getPrivateGlobalPrefix() << getFunctionNumber()
- << '_' << uid << "_set_" << MBB->getNumber();
- } else {
- O << *GetMBBSymbol(MBB->getNumber());
- // If the arch uses custom Jump Table directives, don't calc relative to
- // JT.
- if (!HadJTEntryDirective)
- O << '-' << *GetJTISymbol(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);
}
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;
- }
- }
-}
-
-/// EmitFile - Emit a .file directive.
-void AsmPrinter::EmitFile(unsigned Number, StringRef 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
}
switch (CE->getOpcode()) {
- case Instruction::ZExt:
- case Instruction::SExt:
- case Instruction::FPTrunc:
- case Instruction::FPExt:
- case Instruction::UIToFP:
- case Instruction::SIToFP:
- case Instruction::FPToUI:
- case Instruction::FPToSI:
- default: llvm_unreachable("FIXME: Don't support this constant cast expr");
+ 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
return MCBinaryExpr::CreateAnd(OpExpr, MaskExpr, Ctx);
}
+ // 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: {
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);
void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
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);
}
++OpNo; // Skip over the ID number.
if (Modifier[0] == 'l') // labels are target independent
- O << *GetMBBSymbol(MI->getOperand(OpNo).getMBB()->getNumber());
+ O << *MI->getOperand(OpNo).getMBB()->getSymbol(OutContext);
else {
AsmPrinter *AP = const_cast<AsmPrinter*>(this);
if ((OpFlags & 7) == 4) {
}
}
O << "\n\t" << MAI->getCommentString() << MAI->getInlineAsmEnd();
+ OutStreamer.AddBlankLine();
}
/// printImplicitDef - This method prints the specified machine instruction
O.PadToColumn(MAI->getCommentColumn());
O << MAI->getCommentString() << " implicit-def: "
<< TRI->getName(MI->getOperand(0).getReg());
+ OutStreamer.AddBlankLine();
}
void AsmPrinter::printKill(const MachineInstr *MI) const {
assert(op.isReg() && "KILL instruction must have only register operands");
O << ' ' << TRI->getName(op.getReg()) << (op.isDef() ? "<def>" : "<kill>");
}
+ OutStreamer.AddBlankLine();
}
/// 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());
+ OutStreamer.AddBlankLine();
}
void AsmPrinter::printLabel(unsigned Id) const {
return true;
}
-MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA,
- const char *Suffix) const {
- return GetBlockAddressSymbol(BA->getFunction(), BA->getBasicBlock(), Suffix);
+MCSymbol *AsmPrinter::GetBlockAddressSymbol(const BlockAddress *BA) const {
+ return GetBlockAddressSymbol(BA->getFunction(), BA->getBasicBlock());
}
MCSymbol *AsmPrinter::GetBlockAddressSymbol(const Function *F,
- const BasicBlock *BB,
- const char *Suffix) const {
+ const BasicBlock *BB) const {
assert(BB->hasName() &&
"Address of anonymous basic block not supported yet!");
SmallString<60> NameResult;
Mang->getNameWithPrefix(NameResult,
StringRef("BA") + Twine((unsigned)FnName.size()) +
- "_" + FnName.str() + "_" + BB->getName() + Suffix,
+ "_" + FnName.str() + "_" + BB->getName(),
Mangler::Private);
return OutContext.GetOrCreateSymbol(NameResult.str());
}
-MCSymbol *AsmPrinter::GetMBBSymbol(unsigned MBBID) const {
- SmallString<60> Name;
- raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "BB"
- << getFunctionNumber() << '_' << MBBID;
- return OutContext.GetOrCreateSymbol(Name.str());
-}
-
/// GetCPISymbol - Return the symbol for the specified constant pool entry.
MCSymbol *AsmPrinter::GetCPISymbol(unsigned CPID) const {
SmallString<60> Name;
/// GetJTISymbol - Return the symbol for the specified jump table entry.
MCSymbol *AsmPrinter::GetJTISymbol(unsigned JTID, bool isLinkerPrivate) const {
- const char *Prefix = isLinkerPrivate ? MAI->getLinkerPrivateGlobalPrefix() :
- MAI->getPrivateGlobalPrefix();
+ 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) << Prefix << "JTI" << getFunctionNumber() << '_'
- << JTID;
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << UID << "_set_" << MBBID;
return OutContext.GetOrCreateSymbol(Name.str());
}
}
}
-/// EmitComments - Pretty-print comments for basic blocks.
+/// PrintBasicBlockLoopComments - Pretty-print comments for basic blocks.
static void PrintBasicBlockLoopComments(const MachineBasicBlock &MBB,
const MachineLoopInfo *LI,
const AsmPrinter &AP) {
PrintBasicBlockLoopComments(*MBB, LI, *this);
}
- OutStreamer.EmitLabel(GetMBBSymbol(MBB->getNumber()));
+ OutStreamer.EmitLabel(MBB->getSymbol(OutContext));
}
}
-/// 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 (!MAI->getSetDirective())
- return;
-
- O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ','
- << *GetMBBSymbol(MBB->getNumber())
- << '-' << *GetJTISymbol(uid) << '\n';
-}
-
-void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
- const MachineBasicBlock *MBB) const {
- if (!MAI->getSetDirective())
- return;
-
- O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
- << getFunctionNumber() << '_' << uid << '_' << uid2
- << "_set_" << MBB->getNumber() << ','
- << *GetMBBSymbol(MBB->getNumber())
- << '-' << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
- << '_' << uid << '_' << uid2 << '\n';
-}
-
-void AsmPrinter::printVisibility(MCSymbol *Sym, unsigned Visibility) const {
+void AsmPrinter::EmitVisibility(MCSymbol *Sym, unsigned Visibility) const {
MCSymbolAttr Attr = MCSA_Invalid;
switch (Visibility) {
if (!VerboseAsm)
return;
- bool Newline = false;
-
if (!MI.getDebugLoc().isUnknown()) {
DILocation DLT = MF->getDILocation(MI.getDebugLoc());
O << ':' << DLT.getLineNumber();
if (DLT.getColumnNumber() != 0)
O << ':' << DLT.getColumnNumber();
- Newline = true;
+ O << '\n';
}
// Check for spills and reloads
if (TM.getInstrInfo()->isLoadFromStackSlotPostFE(&MI, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
MMO = *MI.memoperands_begin();
- if (Newline) O << '\n';
O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << ' ' << MMO->getSize() << "-byte Reload";
- Newline = true;
+ O << MAI->getCommentString() << ' ' << MMO->getSize() << "-byte Reload\n";
}
}
else if (TM.getInstrInfo()->hasLoadFromStackSlot(&MI, MMO, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
- if (Newline) O << '\n';
O.PadToColumn(MAI->getCommentColumn());
O << MAI->getCommentString() << ' '
- << MMO->getSize() << "-byte Folded Reload";
- Newline = true;
+ << MMO->getSize() << "-byte Folded Reload\n";
}
}
else if (TM.getInstrInfo()->isStoreToStackSlotPostFE(&MI, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
MMO = *MI.memoperands_begin();
- if (Newline) O << '\n';
O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << ' ' << MMO->getSize() << "-byte Spill";
- Newline = true;
+ O << MAI->getCommentString() << ' ' << MMO->getSize() << "-byte Spill\n";
}
}
else if (TM.getInstrInfo()->hasStoreToStackSlot(&MI, MMO, FI)) {
if (FrameInfo->isSpillSlotObjectIndex(FI)) {
- if (Newline) O << '\n';
O.PadToColumn(MAI->getCommentColumn());
O << MAI->getCommentString() << ' '
- << MMO->getSize() << "-byte Folded Spill";
- Newline = true;
+ << MMO->getSize() << "-byte Folded Spill\n";
}
}
if (TM.getInstrInfo()->isMoveInstr(MI, SrcReg, DstReg,
SrcSubIdx, DstSubIdx)) {
if (MI.getAsmPrinterFlag(ReloadReuse)) {
- if (Newline) O << '\n';
O.PadToColumn(MAI->getCommentColumn());
- O << MAI->getCommentString() << " Reload Reuse";
+ O << MAI->getCommentString() << " Reload Reuse\n";
}
}
}
projects / oota-llvm.git / blobdiff