#include "llvm/Module.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineJumpTableInfo.h"
+#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/Streams.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
-#include <iostream>
#include <cerrno>
using namespace llvm;
-AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm)
-: FunctionNumber(0), O(o), TM(tm),
- CommentString("#"),
- GlobalPrefix(""),
- PrivateGlobalPrefix("."),
- GlobalVarAddrPrefix(""),
- GlobalVarAddrSuffix(""),
- FunctionAddrPrefix(""),
- FunctionAddrSuffix(""),
- InlineAsmStart("#APP"),
- InlineAsmEnd("#NO_APP"),
- ZeroDirective("\t.zero\t"),
- ZeroDirectiveSuffix(0),
- AsciiDirective("\t.ascii\t"),
- AscizDirective("\t.asciz\t"),
- Data8bitsDirective("\t.byte\t"),
- Data16bitsDirective("\t.short\t"),
- Data32bitsDirective("\t.long\t"),
- Data64bitsDirective("\t.quad\t"),
- AlignDirective("\t.align\t"),
- AlignmentIsInBytes(true),
- SwitchToSectionDirective("\t.section\t"),
- TextSectionStartSuffix(""),
- DataSectionStartSuffix(""),
- SectionEndDirectiveSuffix(0),
- ConstantPoolSection("\t.section .rodata\n"),
- JumpTableSection("\t.section .rodata\n"),
- StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
- StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
- LCOMMDirective(0),
- COMMDirective("\t.comm\t"),
- COMMDirectiveTakesAlignment(true),
- HasDotTypeDotSizeDirective(true) {
+static cl::opt<bool>
+AsmVerbose("asm-verbose", cl::Hidden, cl::desc("Add comments to directives."));
+
+AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm,
+ const TargetAsmInfo *T)
+: FunctionNumber(0), O(o), TM(tm), TAI(T)
+{}
+
+std::string AsmPrinter::getSectionForFunction(const Function &F) const {
+ return TAI->getTextSection();
}
const GlobalValue *GV) {
std::string NS;
if (GV && GV->hasSection())
- NS = SwitchToSectionDirective + GV->getSection();
+ NS = TAI->getSwitchToSectionDirective() + GV->getSection();
else
NS = NewSection;
if (CurrentSection == NS) return;
// Close the current section, if applicable.
- if (SectionEndDirectiveSuffix && !CurrentSection.empty())
- O << CurrentSection << SectionEndDirectiveSuffix << "\n";
+ if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
+ O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << "\n";
CurrentSection = NS;
if (!CurrentSection.empty())
- O << CurrentSection << TextSectionStartSuffix << '\n';
+ O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
}
-/// SwitchToTextSection - Switch to the specified text section of the executable
+/// SwitchToDataSection - Switch to the specified data section of the executable
/// if we are not already in it!
///
void AsmPrinter::SwitchToDataSection(const char *NewSection,
const GlobalValue *GV) {
std::string NS;
if (GV && GV->hasSection())
- NS = SwitchToSectionDirective + GV->getSection();
+ NS = TAI->getSwitchToSectionDirective() + GV->getSection();
else
NS = NewSection;
if (CurrentSection == NS) return;
// Close the current section, if applicable.
- if (SectionEndDirectiveSuffix && !CurrentSection.empty())
- O << CurrentSection << SectionEndDirectiveSuffix << "\n";
+ if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
+ O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << "\n";
CurrentSection = NS;
if (!CurrentSection.empty())
- O << CurrentSection << DataSectionStartSuffix << '\n';
+ O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
}
bool AsmPrinter::doInitialization(Module &M) {
- Mang = new Mangler(M, GlobalPrefix);
+ Mang = new Mangler(M, TAI->getGlobalPrefix());
if (!M.getModuleInlineAsm().empty())
- O << CommentString << " Start of file scope inline assembly\n"
+ O << TAI->getCommentString() << " Start of file scope inline assembly\n"
<< M.getModuleInlineAsm()
- << "\n" << CommentString << " End of file scope inline assembly\n";
+ << "\n" << TAI->getCommentString()
+ << " End of file scope inline assembly\n";
- SwitchToDataSection("", 0); // Reset back to no section.
+ SwitchToDataSection(""); // Reset back to no section.
- if (MachineDebugInfo *DebugInfo = getAnalysisToUpdate<MachineDebugInfo>()) {
- DebugInfo->AnalyzeModule(M);
+ if (MachineModuleInfo *MMI = getAnalysisToUpdate<MachineModuleInfo>()) {
+ MMI->AnalyzeModule(M);
}
return false;
}
bool AsmPrinter::doFinalization(Module &M) {
+ if (TAI->getWeakRefDirective()) {
+ if (ExtWeakSymbols.begin() != ExtWeakSymbols.end())
+ SwitchToDataSection("");
+
+ for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
+ e = ExtWeakSymbols.end(); i != e; ++i) {
+ const GlobalValue *GV = *i;
+ std::string Name = Mang->getValueName(GV);
+ O << TAI->getWeakRefDirective() << Name << "\n";
+ }
+ }
+
delete Mang; Mang = 0;
return false;
}
void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
if (CP.empty()) return;
-
- SwitchToDataSection(ConstantPoolSection, 0);
- EmitAlignment(MCP->getConstantPoolAlignment());
+
+ // Some targets require 4-, 8-, and 16- byte constant literals to be placed
+ // in special sections.
+ std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
+ std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
+ std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
+ std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
+ std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
+ for (unsigned i = 0, e = CP.size(); i != e; ++i) {
+ MachineConstantPoolEntry CPE = CP[i];
+ const Type *Ty = CPE.getType();
+ if (TAI->getFourByteConstantSection() &&
+ TM.getTargetData()->getTypeSize(Ty) == 4)
+ FourByteCPs.push_back(std::make_pair(CPE, i));
+ else if (TAI->getEightByteConstantSection() &&
+ TM.getTargetData()->getTypeSize(Ty) == 8)
+ EightByteCPs.push_back(std::make_pair(CPE, i));
+ else if (TAI->getSixteenByteConstantSection() &&
+ TM.getTargetData()->getTypeSize(Ty) == 16)
+ SixteenByteCPs.push_back(std::make_pair(CPE, i));
+ else
+ OtherCPs.push_back(std::make_pair(CPE, i));
+ }
+
+ unsigned Alignment = MCP->getConstantPoolAlignment();
+ EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
+ EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
+ EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
+ SixteenByteCPs);
+ EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
+}
+
+void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
+ std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
+ if (CP.empty()) return;
+
+ SwitchToDataSection(Section);
+ EmitAlignment(Alignment);
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
- O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << '_' << i
- << ":\t\t\t\t\t" << CommentString << " ";
- WriteTypeSymbolic(O, CP[i].Val->getType(), 0) << '\n';
- EmitGlobalConstant(CP[i].Val);
+ O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
+ << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << " ";
+ WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
+ if (CP[i].first.isMachineConstantPoolEntry())
+ EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
+ else
+ EmitGlobalConstant(CP[i].first.Val.ConstVal);
if (i != e-1) {
- unsigned EntSize = TM.getTargetData()->getTypeSize(CP[i].Val->getType());
- unsigned ValEnd = CP[i].Offset + EntSize;
+ const Type *Ty = CP[i].first.getType();
+ unsigned EntSize =
+ TM.getTargetData()->getTypeSize(Ty);
+ unsigned ValEnd = CP[i].first.getOffset() + EntSize;
// Emit inter-object padding for alignment.
- EmitZeros(CP[i+1].Offset-ValEnd);
+ EmitZeros(CP[i+1].first.getOffset()-ValEnd);
}
}
}
/// EmitJumpTableInfo - Print assembly representations of the jump tables used
/// by the current function to the current output stream.
///
-void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI) {
+void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
+ MachineFunction &MF) {
const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
if (JT.empty()) return;
- const TargetData *TD = TM.getTargetData();
+ bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
- // FIXME: someday we need to handle PIC jump tables
- assert((TM.getRelocationModel() == Reloc::Static ||
- TM.getRelocationModel() == Reloc::DynamicNoPIC) &&
- "Unhandled relocation model emitting jump table information!");
+ // Use JumpTableDirective otherwise honor the entry size from the jump table
+ // info.
+ const char *JTEntryDirective = TAI->getJumpTableDirective();
+ bool HadJTEntryDirective = JTEntryDirective != NULL;
+ if (!HadJTEntryDirective) {
+ JTEntryDirective = MJTI->getEntrySize() == 4 ?
+ TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
+ }
+
+ // Pick the directive to use to print the jump table entries, and switch to
+ // the appropriate section.
+ TargetLowering *LoweringInfo = TM.getTargetLowering();
+
+ const char* JumpTableDataSection = TAI->getJumpTableDataSection();
+ if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
+ !JumpTableDataSection) {
+ // 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.
+ const Function *F = MF.getFunction();
+ SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
+ } else {
+ SwitchToDataSection(JumpTableDataSection);
+ }
+
+ EmitAlignment(Log2_32(MJTI->getAlignment()));
- SwitchToDataSection(JumpTableSection, 0);
- EmitAlignment(Log2_32(TD->getPointerAlignment()));
for (unsigned i = 0, e = JT.size(); i != e; ++i) {
- O << PrivateGlobalPrefix << "JTI" << getFunctionNumber() << '_' << i
- << ":\n";
const std::vector<MachineBasicBlock*> &JTBBs = JT[i].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.
+ std::set<MachineBasicBlock*> EmittedSets;
+ if (TAI->getSetDirective() && IsPic)
+ for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
+ if (EmittedSets.insert(JTBBs[ii]).second)
+ printSetLabel(i, JTBBs[ii]);
+
+ // 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 (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) {
- O << Data32bitsDirective << ' ';
- printBasicBlockLabel(JTBBs[ii]);
+ 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 (!EmittedSets.empty()) {
+ O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
+ << '_' << i << "_set_" << JTBBs[ii]->getNumber();
+ } else if (IsPic) {
+ printBasicBlockLabel(JTBBs[ii], false, false);
+ // If the arch uses custom Jump Table directives, don't calc relative to
+ // JT
+ if (!HadJTEntryDirective)
+ O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
+ << getFunctionNumber() << '_' << i;
+ } else {
+ printBasicBlockLabel(JTBBs[ii], false, false);
+ }
O << '\n';
}
}
assert(GV->hasInitializer() && "Not a special LLVM global!");
- if (GV->getName() == "llvm.used")
- return true; // No need to emit this at all.
+ if (GV->getName() == "llvm.used") {
+ if (TAI->getUsedDirective() != 0) // No need to emit this at all.
+ EmitLLVMUsedList(GV->getInitializer());
+ return true;
+ }
if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
- SwitchToDataSection(StaticCtorsSection, 0);
+ SwitchToDataSection(TAI->getStaticCtorsSection());
EmitAlignment(2, 0);
EmitXXStructorList(GV->getInitializer());
return true;
}
if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
- SwitchToDataSection(StaticDtorsSection, 0);
+ SwitchToDataSection(TAI->getStaticDtorsSection());
EmitAlignment(2, 0);
EmitXXStructorList(GV->getInitializer());
return true;
return false;
}
+/// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
+/// global in the specified llvm.used list as being used with this directive.
+void AsmPrinter::EmitLLVMUsedList(Constant *List) {
+ const char *Directive = TAI->getUsedDirective();
+
+ // Should be an array of 'sbyte*'.
+ ConstantArray *InitList = dyn_cast<ConstantArray>(List);
+ if (InitList == 0) return;
+
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
+ O << Directive;
+ EmitConstantValueOnly(InitList->getOperand(i));
+ O << "\n";
+ }
+}
+
/// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
/// function pointers, ignoring the init priority.
void AsmPrinter::EmitXXStructorList(Constant *List) {
}
}
-/// getPreferredAlignmentLog - Return the preferred alignment of the
-/// specified global, returned in log form. This includes an explicitly
-/// requested alignment (if the global has one).
-unsigned AsmPrinter::getPreferredAlignmentLog(const GlobalVariable *GV) const {
- unsigned Alignment = TM.getTargetData()->getTypeAlignmentShift(GV->getType());
- if (GV->getAlignment() > (1U << Alignment))
- Alignment = Log2_32(GV->getAlignment());
+/// 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) const{
+ std::string LinkName;
+
+ if (isa<Function>(GV)) {
+ LinkName += TAI->getFunctionAddrPrefix();
+ LinkName += Mang->getValueName(GV);
+ LinkName += TAI->getFunctionAddrSuffix();
+ } else {
+ LinkName += TAI->getGlobalVarAddrPrefix();
+ LinkName += Mang->getValueName(GV);
+ LinkName += TAI->getGlobalVarAddrSuffix();
+ }
+
+ return LinkName;
+}
+
+//===----------------------------------------------------------------------===//
+/// 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 {
+ do {
+ unsigned Byte = Value & 0x7f;
+ Value >>= 7;
+ if (Value) Byte |= 0x80;
+ O << "0x" << std::hex << Byte << std::dec;
+ if (Value) O << ", ";
+ } while (Value);
+}
+
+/// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
+/// value.
+unsigned AsmPrinter::SizeULEB128(unsigned Value) {
+ unsigned Size = 0;
+ do {
+ Value >>= 7;
+ Size += sizeof(int8_t);
+ } while (Value);
+ return Size;
+}
+
+/// 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;
+
+ do {
+ unsigned Byte = Value & 0x7f;
+ Value >>= 7;
+ IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
+ if (IsMore) Byte |= 0x80;
+ O << "0x" << std::hex << Byte << std::dec;
+ if (IsMore) O << ", ";
+ } while (IsMore);
+}
+
+/// SizeSLEB128 - Compute the number of bytes required for a signed leb128
+/// value.
+unsigned AsmPrinter::SizeSLEB128(int Value) {
+ unsigned Size = 0;
+ int Sign = Value >> (8 * sizeof(Value) - 1);
+ bool IsMore;
- if (GV->hasInitializer()) {
- // Always round up alignment of global doubles to 8 bytes.
- if (GV->getType()->getElementType() == Type::DoubleTy && Alignment < 3)
- Alignment = 3;
- if (Alignment < 4) {
- // If the global is not external, see if it is large. If so, give it a
- // larger alignment.
- if (TM.getTargetData()->getTypeSize(GV->getType()->getElementType()) > 128)
- Alignment = 4; // 16-byte alignment.
+ do {
+ unsigned Byte = Value & 0x7f;
+ Value >>= 7;
+ IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
+ Size += sizeof(int8_t);
+ } while (IsMore);
+ return Size;
+}
+
+//===--------------------------------------------------------------------===//
+// Emission and print routines
+//
+
+/// PrintHex - Print a value as a hexidecimal value.
+///
+void AsmPrinter::PrintHex(int Value) const {
+ O << "0x" << std::hex << Value << std::dec;
+}
+
+/// 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 std::string &Comment) const {
+ if (AsmVerbose && !Comment.empty()) {
+ O << "\t"
+ << 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);
+}
+
+/// EmitInt16 - Emit a short directive and value.
+///
+void AsmPrinter::EmitInt16(int Value) const {
+ O << TAI->getData16bitsDirective();
+ PrintHex(Value & 0xFFFF);
+}
+
+/// EmitInt32 - Emit a long directive and value.
+///
+void AsmPrinter::EmitInt32(int Value) const {
+ O << TAI->getData32bitsDirective();
+ PrintHex(Value);
+}
+
+/// 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));
+ }
+ }
+}
+
+/// 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(std::ostream &O, unsigned char C) {
+ if (C == '"') {
+ O << "\\\"";
+ } else if (C == '\\') {
+ O << "\\\\";
+ } else if (isprint(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;
}
}
- return Alignment;
}
+/// 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 {
+ O << TAI->getAsciiDirective()
+ << "\"";
+ for (unsigned i = 0, N = String.size(); i < N; ++i) {
+ unsigned char C = String[i];
+ printStringChar(O, C);
+ }
+ O << "\\0\"";
+}
+
+
+//===----------------------------------------------------------------------===//
+
// EmitAlignment - Emit an alignment directive to the specified power of two.
void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const {
if (GV && GV->getAlignment())
NumBits = Log2_32(GV->getAlignment());
if (NumBits == 0) return; // No need to emit alignment.
- if (AlignmentIsInBytes) NumBits = 1 << NumBits;
- O << AlignDirective << NumBits << "\n";
+ if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
+ O << TAI->getAlignDirective() << NumBits << "\n";
}
/// EmitZeros - Emit a block of zeros.
///
void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
if (NumZeros) {
- if (ZeroDirective) {
- O << ZeroDirective << NumZeros;
- if (ZeroDirectiveSuffix)
- O << ZeroDirectiveSuffix;
+ if (TAI->getZeroDirective()) {
+ O << TAI->getZeroDirective() << NumZeros;
+ if (TAI->getZeroDirectiveSuffix())
+ O << TAI->getZeroDirectiveSuffix();
O << "\n";
} else {
for (; NumZeros; --NumZeros)
- O << Data8bitsDirective << "0\n";
+ O << TAI->getData8bitsDirective() << "0\n";
}
}
}
void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
if (CV->isNullValue() || isa<UndefValue>(CV))
O << "0";
- else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
- assert(CB == ConstantBool::True);
- O << "1";
- } else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
- if (((CI->getValue() << 32) >> 32) == CI->getValue())
- O << CI->getValue();
- else
- O << (uint64_t)CI->getValue();
- else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
- O << CI->getValue();
- else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
+ 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 << FunctionAddrPrefix << Mang->getValueName(GV) << FunctionAddrSuffix;
- else
- O << GlobalVarAddrPrefix << Mang->getValueName(GV) << GlobalVarAddrSuffix;
+ if (isa<Function>(GV)) {
+ O << TAI->getFunctionAddrPrefix()
+ << Mang->getValueName(GV)
+ << TAI->getFunctionAddrSuffix();
+ } else {
+ O << TAI->getGlobalVarAddrPrefix()
+ << Mang->getValueName(GV)
+ << TAI->getGlobalVarAddrSuffix();
+ }
} else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
const TargetData *TD = TM.getTargetData();
switch(CE->getOpcode()) {
}
break;
}
- case Instruction::Cast: {
- // Support only non-converting or widening casts for now, that is, ones
- // that do not involve a change in value. This assertion is really gross,
- // and may not even be a complete check.
+ 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:
+ assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
+ 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);
- const Type *OpTy = Op->getType(), *Ty = CE->getType();
-
- // Remember, kids, pointers can be losslessly converted back and forth
- // into 32-bit or wider integers, regardless of signedness. :-P
- assert(((isa<PointerType>(OpTy)
- && (Ty == Type::LongTy || Ty == Type::ULongTy
- || Ty == Type::IntTy || Ty == Type::UIntTy))
- || (isa<PointerType>(Ty)
- && (OpTy == Type::LongTy || OpTy == Type::ULongTy
- || OpTy == Type::IntTy || OpTy == Type::UIntTy))
- || (((TD->getTypeSize(Ty) >= TD->getTypeSize(OpTy))
- && OpTy->isLosslesslyConvertibleTo(Ty))))
- && "FIXME: Don't yet support this kind of constant cast expr");
+ Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
+ return EmitConstantValueOnly(Op);
+ }
+
+
+ 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 (Ty->isInteger() &&
+ TD->getTypeSize(Ty) >= TD->getTypeSize(Op->getType()))
+ return EmitConstantValueOnly(Op);
+
+ assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
EmitConstantValueOnly(Op);
break;
}
}
}
-/// toOctal - Convert the low order bits of X into an octal digit.
-///
-static inline char toOctal(int X) {
- return (X&7)+'0';
-}
-
/// printAsCString - Print the specified array as a C compatible string, only if
/// the predicate isString is true.
///
O << "\"";
for (unsigned i = 0; i != LastElt; ++i) {
unsigned char C =
- (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
-
- if (C == '"') {
- O << "\\\"";
- } else if (C == '\\') {
- O << "\\\\";
- } else if (isprint(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;
- }
- }
+ (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
+ printStringChar(O, C);
}
O << "\"";
}
///
void AsmPrinter::EmitString(const ConstantArray *CVA) const {
unsigned NumElts = CVA->getNumOperands();
- if (AscizDirective && NumElts &&
- cast<ConstantInt>(CVA->getOperand(NumElts-1))->getRawValue() == 0) {
- O << AscizDirective;
+ if (TAI->getAscizDirective() && NumElts &&
+ cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
+ O << TAI->getAscizDirective();
printAsCString(O, CVA, NumElts-1);
} else {
- O << AsciiDirective;
+ O << TAI->getAsciiDirective();
printAsCString(O, CVA, NumElts);
}
O << "\n";
// precision...
double Val = CFP->getValue();
if (CFP->getType() == Type::DoubleTy) {
- if (Data64bitsDirective)
- O << Data64bitsDirective << DoubleToBits(Val) << "\t" << CommentString
- << " double value: " << Val << "\n";
+ if (TAI->getData64bitsDirective())
+ O << TAI->getData64bitsDirective() << DoubleToBits(Val) << "\t"
+ << TAI->getCommentString() << " double value: " << Val << "\n";
else if (TD->isBigEndian()) {
- O << Data32bitsDirective << unsigned(DoubleToBits(Val) >> 32)
- << "\t" << CommentString << " double most significant word "
- << Val << "\n";
- O << Data32bitsDirective << unsigned(DoubleToBits(Val))
- << "\t" << CommentString << " double least significant word "
- << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(DoubleToBits(Val) >> 32)
+ << "\t" << TAI->getCommentString()
+ << " double most significant word " << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(DoubleToBits(Val))
+ << "\t" << TAI->getCommentString()
+ << " double least significant word " << Val << "\n";
} else {
- O << Data32bitsDirective << unsigned(DoubleToBits(Val))
- << "\t" << CommentString << " double least significant word " << Val
- << "\n";
- O << Data32bitsDirective << unsigned(DoubleToBits(Val) >> 32)
- << "\t" << CommentString << " double most significant word " << Val
- << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(DoubleToBits(Val))
+ << "\t" << TAI->getCommentString()
+ << " double least significant word " << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(DoubleToBits(Val) >> 32)
+ << "\t" << TAI->getCommentString()
+ << " double most significant word " << Val << "\n";
}
return;
} else {
- O << Data32bitsDirective << FloatToBits(Val) << "\t" << CommentString
- << " float " << Val << "\n";
+ O << TAI->getData32bitsDirective() << FloatToBits(Val)
+ << "\t" << TAI->getCommentString() << " float " << Val << "\n";
return;
}
- } else if (CV->getType() == Type::ULongTy || CV->getType() == Type::LongTy) {
+ } else if (CV->getType() == Type::Int64Ty) {
if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
- uint64_t Val = CI->getRawValue();
+ uint64_t Val = CI->getZExtValue();
- if (Data64bitsDirective)
- O << Data64bitsDirective << Val << "\n";
+ if (TAI->getData64bitsDirective())
+ O << TAI->getData64bitsDirective() << Val << "\n";
else if (TD->isBigEndian()) {
- O << Data32bitsDirective << unsigned(Val >> 32)
- << "\t" << CommentString << " Double-word most significant word "
- << Val << "\n";
- O << Data32bitsDirective << unsigned(Val)
- << "\t" << CommentString << " Double-word least significant word "
- << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
+ << "\t" << TAI->getCommentString()
+ << " Double-word most significant word " << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(Val)
+ << "\t" << TAI->getCommentString()
+ << " Double-word least significant word " << Val << "\n";
} else {
- O << Data32bitsDirective << unsigned(Val)
- << "\t" << CommentString << " Double-word least significant word "
- << Val << "\n";
- O << Data32bitsDirective << unsigned(Val >> 32)
- << "\t" << CommentString << " Double-word most significant word "
- << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(Val)
+ << "\t" << TAI->getCommentString()
+ << " Double-word least significant word " << Val << "\n";
+ O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
+ << "\t" << TAI->getCommentString()
+ << " Double-word most significant word " << Val << "\n";
}
return;
}
}
const Type *type = CV->getType();
- switch (type->getTypeID()) {
- case Type::BoolTyID:
- case Type::UByteTyID: case Type::SByteTyID:
- O << Data8bitsDirective;
- break;
- case Type::UShortTyID: case Type::ShortTyID:
- O << Data16bitsDirective;
- break;
- case Type::PointerTyID:
- if (TD->getPointerSize() == 8) {
- O << Data64bitsDirective;
- break;
- }
- //Fall through for pointer size == int size
- case Type::UIntTyID: case Type::IntTyID:
- O << Data32bitsDirective;
- break;
- case Type::ULongTyID: case Type::LongTyID:
- assert(Data64bitsDirective &&"Target cannot handle 64-bit constant exprs!");
- O << Data64bitsDirective;
- break;
- case Type::FloatTyID: case Type::DoubleTyID:
- assert (0 && "Should have already output floating point constant.");
- default:
- assert (0 && "Can't handle printing this type of thing");
- break;
- }
+ printDataDirective(type);
EmitConstantValueOnly(CV);
O << "\n";
}
+void
+AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
+ // Target doesn't support this yet!
+ abort();
+}
+
+/// PrintSpecial - Print information related to the specified machine instr
+/// that is independent of the operand, and may be independent of the instr
+/// itself. This can be useful for portably encoding the comment character
+/// or other bits of target-specific knowledge into the asmstrings. The
+/// syntax used is ${:comment}. Targets can override this to add support
+/// for their own strange codes.
+void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
+ if (!strcmp(Code, "private")) {
+ O << TAI->getPrivateGlobalPrefix();
+ } else if (!strcmp(Code, "comment")) {
+ O << TAI->getCommentString();
+ } else if (!strcmp(Code, "uid")) {
+ // Assign a unique ID to this machine instruction.
+ static const MachineInstr *LastMI = 0;
+ static unsigned Counter = 0U-1;
+ // If this is a new machine instruction, bump the counter.
+ if (LastMI != MI) { ++Counter; LastMI = MI; }
+ O << Counter;
+ } else {
+ cerr << "Unknown special formatter '" << Code
+ << "' for machine instr: " << *MI;
+ exit(1);
+ }
+}
+
+
/// printInlineAsm - This method formats and prints the specified machine
/// instruction that is an inline asm.
void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
- O << InlineAsmStart << "\n\t";
unsigned NumOperands = MI->getNumOperands();
// Count the number of register definitions.
unsigned NumDefs = 0;
- for (; MI->getOperand(NumDefs).isDef(); ++NumDefs)
+ for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
+ ++NumDefs)
assert(NumDefs != NumOperands-1 && "No asm string?");
assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
// Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
- // The variant of the current asmprinter: FIXME: change.
- int AsmPrinterVariant = 0;
+ // If this asmstr is empty, don't bother printing the #APP/#NOAPP markers.
+ if (AsmStr[0] == 0) {
+ O << "\n"; // Tab already printed, avoid double indenting next instr.
+ return;
+ }
+ O << TAI->getInlineAsmStart() << "\n\t";
+
+ // The variant of the current asmprinter.
+ int AsmPrinterVariant = TAI->getAssemblerDialect();
+
int CurVariant = -1; // The number of the {.|.|.} region we are in.
const char *LastEmitted = AsmStr; // One past the last character emitted.
break;
case '$': {
++LastEmitted; // Consume '$' character.
- if (*LastEmitted == '$') { // $$ -> $
+ bool Done = true;
+
+ // Handle escapes.
+ switch (*LastEmitted) {
+ default: Done = false; break;
+ case '$': // $$ -> $
if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
O << '$';
++LastEmitted; // Consume second '$' character.
break;
+ case '(': // $( -> same as GCC's { character.
+ ++LastEmitted; // Consume '(' character.
+ if (CurVariant != -1) {
+ cerr << "Nested variants found in inline asm string: '"
+ << AsmStr << "'\n";
+ exit(1);
+ }
+ CurVariant = 0; // We're in the first variant now.
+ break;
+ case '|':
+ ++LastEmitted; // consume '|' character.
+ if (CurVariant == -1) {
+ cerr << "Found '|' character outside of variant in inline asm "
+ << "string: '" << AsmStr << "'\n";
+ exit(1);
+ }
+ ++CurVariant; // We're in the next variant.
+ break;
+ case ')': // $) -> same as GCC's } char.
+ ++LastEmitted; // consume ')' character.
+ if (CurVariant == -1) {
+ cerr << "Found '}' character outside of variant in inline asm "
+ << "string: '" << AsmStr << "'\n";
+ exit(1);
+ }
+ CurVariant = -1;
+ break;
}
+ if (Done) break;
bool HasCurlyBraces = false;
if (*LastEmitted == '{') { // ${variable}
const char *IDStart = LastEmitted;
char *IDEnd;
+ errno = 0;
long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
- std::cerr << "Bad $ operand number in inline asm string: '"
- << AsmStr << "'\n";
+ cerr << "Bad $ operand number in inline asm string: '"
+ << AsmStr << "'\n";
exit(1);
}
LastEmitted = IDEnd;
if (*LastEmitted == ':') {
++LastEmitted; // Consume ':' character.
if (*LastEmitted == 0) {
- std::cerr << "Bad ${:} expression in inline asm string: '"
- << AsmStr << "'\n";
+ cerr << "Bad ${:} expression in inline asm string: '"
+ << AsmStr << "'\n";
exit(1);
}
}
if (*LastEmitted != '}') {
- std::cerr << "Bad ${} expression in inline asm string: '"
- << AsmStr << "'\n";
+ cerr << "Bad ${} expression in inline asm string: '"
+ << AsmStr << "'\n";
exit(1);
}
++LastEmitted; // Consume '}' character.
}
if ((unsigned)Val >= NumOperands-1) {
- std::cerr << "Invalid $ operand number in inline asm string: '"
- << AsmStr << "'\n";
+ cerr << "Invalid $ operand number in inline asm string: '"
+ << AsmStr << "'\n";
exit(1);
}
// operand!
if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
unsigned OpNo = 1;
-
+
+ bool Error = false;
+
// Scan to find the machine operand number for the operand.
for (; Val; --Val) {
+ if (OpNo >= MI->getNumOperands()) break;
unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
OpNo += (OpFlags >> 3) + 1;
}
-
- unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
- ++OpNo; // Skip over the ID number.
-
- bool Error;
- AsmPrinter *AP = const_cast<AsmPrinter*>(this);
- if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
- Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
- Modifier[0] ? Modifier : 0);
+
+ if (OpNo >= MI->getNumOperands()) {
+ Error = true;
} else {
- Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
- Modifier[0] ? Modifier : 0);
+ unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
+ ++OpNo; // Skip over the ID number.
+
+ AsmPrinter *AP = const_cast<AsmPrinter*>(this);
+ if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
+ Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
+ Modifier[0] ? Modifier : 0);
+ } else {
+ Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
+ Modifier[0] ? Modifier : 0);
+ }
}
if (Error) {
- std::cerr << "Invalid operand found in inline asm: '"
- << AsmStr << "'\n";
+ cerr << "Invalid operand found in inline asm: '"
+ << AsmStr << "'\n";
MI->dump();
exit(1);
}
}
break;
}
- case '{':
- ++LastEmitted; // Consume '{' character.
- if (CurVariant != -1) {
- std::cerr << "Nested variants found in inline asm string: '"
- << AsmStr << "'\n";
- exit(1);
- }
- CurVariant = 0; // We're in the first variant now.
- break;
- case '|':
- ++LastEmitted; // consume '|' character.
- if (CurVariant == -1) {
- std::cerr << "Found '|' character outside of variant in inline asm "
- << "string: '" << AsmStr << "'\n";
- exit(1);
- }
- ++CurVariant; // We're in the next variant.
- break;
- case '}':
- ++LastEmitted; // consume '}' character.
- if (CurVariant == -1) {
- std::cerr << "Found '}' character outside of variant in inline asm "
- << "string: '" << AsmStr << "'\n";
- exit(1);
- }
- CurVariant = -1;
- break;
}
}
- O << "\n\t" << InlineAsmEnd << "\n";
+ O << "\n\t" << TAI->getInlineAsmEnd() << "\n";
+}
+
+/// printLabel - This method prints a local label used by debug and
+/// exception handling tables.
+void AsmPrinter::printLabel(const MachineInstr *MI) const {
+ O << "\n"
+ << TAI->getPrivateGlobalPrefix()
+ << "label_"
+ << MI->getOperand(0).getImmedValue()
+ << ":\n";
}
/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
bool printColon,
bool printComment) const {
- O << PrivateGlobalPrefix << "BB" << FunctionNumber << "_"
+ O << TAI->getPrivateGlobalPrefix() << "BB" << FunctionNumber << "_"
<< MBB->getNumber();
if (printColon)
O << ':';
- if (printComment)
- O << '\t' << CommentString << MBB->getBasicBlock()->getName();
+ if (printComment && MBB->getBasicBlock())
+ O << '\t' << TAI->getCommentString() << MBB->getBasicBlock()->getName();
+}
+
+/// printSetLabel - This method prints a set label for the specified
+/// MachineBasicBlock
+void AsmPrinter::printSetLabel(unsigned uid,
+ const MachineBasicBlock *MBB) const {
+ if (!TAI->getSetDirective())
+ return;
+
+ O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
+ printBasicBlockLabel(MBB, false, false);
+ O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << uid << '\n';
+}
+
+void AsmPrinter::printSetLabel(unsigned uid, unsigned uid2,
+ const MachineBasicBlock *MBB) const {
+ if (!TAI->getSetDirective())
+ return;
+
+ O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << uid << '_' << uid2
+ << "_set_" << MBB->getNumber() << ',';
+ printBasicBlockLabel(MBB, false, false);
+ O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << '_' << uid << '_' << uid2 << '\n';
+}
+
+/// printDataDirective - This method prints the asm directive for the
+/// specified type.
+void AsmPrinter::printDataDirective(const Type *type) {
+ const TargetData *TD = TM.getTargetData();
+ switch (type->getTypeID()) {
+ case Type::IntegerTyID: {
+ unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
+ if (BitWidth <= 8)
+ O << TAI->getData8bitsDirective();
+ else if (BitWidth <= 16)
+ O << TAI->getData16bitsDirective();
+ else if (BitWidth <= 32)
+ O << TAI->getData32bitsDirective();
+ else if (BitWidth <= 64) {
+ assert(TAI->getData64bitsDirective() &&
+ "Target cannot handle 64-bit constant exprs!");
+ O << TAI->getData64bitsDirective();
+ }
+ break;
+ }
+ case Type::PointerTyID:
+ if (TD->getPointerSize() == 8) {
+ assert(TAI->getData64bitsDirective() &&
+ "Target cannot handle 64-bit pointer exprs!");
+ O << TAI->getData64bitsDirective();
+ } else {
+ O << TAI->getData32bitsDirective();
+ }
+ break;
+ case Type::FloatTyID: case Type::DoubleTyID:
+ assert (0 && "Should have already output floating point constant.");
+ default:
+ assert (0 && "Can't handle printing this type of thing");
+ break;
+ }
}
projects / oota-llvm.git / blobdiff