#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
+#include "llvm/InlineAsm.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/SymbolTable.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/Compressor.h"
#include "llvm/Support/MathExtras.h"
+#include "llvm/System/Program.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Statistic.h"
#include <cstring>
inline void BytecodeWriter::output(const std::string &s) {
unsigned Len = s.length();
- output_vbr(Len ); // Strings may have an arbitrary length...
+ output_vbr(Len); // Strings may have an arbitrary length.
Out.insert(Out.end(), s.begin(), s.end());
}
/// FIXME: This isn't optimal, it has size problems on some platforms
/// where FP is not IEEE.
uint32_t i = FloatToBits(FloatVal);
- Out.push_back( static_cast<unsigned char>( (i & 0xFF )));
- Out.push_back( static_cast<unsigned char>( (i >> 8) & 0xFF));
+ Out.push_back( static_cast<unsigned char>( (i ) & 0xFF));
+ Out.push_back( static_cast<unsigned char>( (i >> 8 ) & 0xFF));
Out.push_back( static_cast<unsigned char>( (i >> 16) & 0xFF));
Out.push_back( static_cast<unsigned char>( (i >> 24) & 0xFF));
}
/// FIXME: This isn't optimal, it has size problems on some platforms
/// where FP is not IEEE.
uint64_t i = DoubleToBits(DoubleVal);
- Out.push_back( static_cast<unsigned char>( (i & 0xFF )));
- Out.push_back( static_cast<unsigned char>( (i >> 8) & 0xFF));
+ Out.push_back( static_cast<unsigned char>( (i ) & 0xFF));
+ Out.push_back( static_cast<unsigned char>( (i >> 8 ) & 0xFF));
Out.push_back( static_cast<unsigned char>( (i >> 16) & 0xFF));
Out.push_back( static_cast<unsigned char>( (i >> 24) & 0xFF));
Out.push_back( static_cast<unsigned char>( (i >> 32) & 0xFF));
Out.push_back( static_cast<unsigned char>( (i >> 56) & 0xFF));
}
-inline BytecodeBlock::BytecodeBlock(unsigned ID, BytecodeWriter& w,
- bool elideIfEmpty, bool hasLongFormat )
+inline BytecodeBlock::BytecodeBlock(unsigned ID, BytecodeWriter &w,
+ bool elideIfEmpty, bool hasLongFormat)
: Id(ID), Writer(w), ElideIfEmpty(elideIfEmpty), HasLongFormat(hasLongFormat){
if (HasLongFormat) {
return;
}
+/// outputInlineAsm - InlineAsm's get emitted to the constant pool, so they can
+/// be shared by multiple uses.
+void BytecodeWriter::outputInlineAsm(const InlineAsm *IA) {
+ // Output a marker, so we know when we have one one parsing the constant pool.
+ // Note that this encoding is 5 bytes: not very efficient for a marker. Since
+ // unique inline asms are rare, this should hardly matter.
+ output_vbr(~0U);
+
+ output(IA->getAsmString());
+ output(IA->getConstraintString());
+ output_vbr(unsigned(IA->hasSideEffects()));
+}
+
void BytecodeWriter::outputConstantStrings() {
SlotCalculator::string_iterator I = Table.string_begin();
SlotCalculator::string_iterator E = Table.string_end();
//===----------------------------------------------------------------------===//
//=== Instruction Output ===//
//===----------------------------------------------------------------------===//
-typedef unsigned char uchar;
// outputInstructionFormat0 - Output those weird instructions that have a large
// number of operands or have large operands themselves.
// variable argument.
NumFixedOperands = 3+NumParams;
}
- output_vbr(2 * I->getNumOperands()-NumFixedOperands);
+ output_vbr(2 * I->getNumOperands()-NumFixedOperands +
+ unsigned(Opcode == 56 || Opcode == 58));
// The type for the function has already been emitted in the type field of the
// instruction. Just emit the slot # now.
assert(Slot >= 0 && "No slot number for value!?!?");
output_vbr((unsigned)Slot);
}
+
+ // If this is the escape sequence for call, emit the tailcall/cc info.
+ if (Opcode == 58) {
+ const CallInst *CI = cast<CallInst>(I);
+ output_vbr((CI->getCallingConv() << 1) | unsigned(CI->isTailCall()));
+ } else if (Opcode == 56) { // Invoke escape sequence.
+ output_vbr(cast<InvokeInst>(I)->getCallingConv());
+ }
}
assert(Slots[1] != ~0U && "Cast return type unknown?");
if (Slots[1] > MaxOpSlot) MaxOpSlot = Slots[1];
NumOperands++;
+ } else if (const AllocationInst *AI = dyn_cast<AllocationInst>(&I)) {
+ assert(NumOperands == 1 && "Bogus allocation!");
+ if (AI->getAlignment()) {
+ Slots[1] = Log2_32(AI->getAlignment())+1;
+ if (Slots[1] > MaxOpSlot) MaxOpSlot = Slots[1];
+ NumOperands = 2;
+ }
} else if (const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(&I)) {
// We need to encode the type of sequential type indices into their slot #
unsigned Idx = 1;
// If this is the escape sequence for call, emit the tailcall/cc info.
const CallInst &CI = cast<CallInst>(I);
++NumOperands;
- if (NumOperands < 3) {
- Slots[NumOperands-1] = (CI.getCallingConv() << 1)|unsigned(CI.isTailCall());
+ if (NumOperands <= 3) {
+ Slots[NumOperands-1] =
+ (CI.getCallingConv() << 1)|unsigned(CI.isTailCall());
if (Slots[NumOperands-1] > MaxOpSlot)
MaxOpSlot = Slots[NumOperands-1];
}
: Out(o), Table(M) {
// Emit the signature...
- static const unsigned char *Sig = (const unsigned char*)"llvm";
+ static const unsigned char *Sig = (const unsigned char*)"llvm";
output_data(Sig, Sig+4);
// Emit the top level CLASS block.
// The Global type plane comes first
{
- BytecodeBlock CPool(BytecodeFormat::GlobalTypePlaneBlockID, *this );
- outputTypes(Type::FirstDerivedTyID);
+ BytecodeBlock CPool(BytecodeFormat::GlobalTypePlaneBlockID, *this);
+ outputTypes(Type::FirstDerivedTyID);
}
// The ModuleInfoBlock follows directly after the type information
/*empty*/;
unsigned NC = ValNo; // Number of constants
- for (; NC < Plane.size() && (isa<Constant>(Plane[NC])); NC++)
+ for (; NC < Plane.size() && (isa<Constant>(Plane[NC]) ||
+ isa<InlineAsm>(Plane[NC])); NC++)
/*empty*/;
NC -= ValNo; // Convert from index into count
if (NC == 0) return; // Skip empty type planes...
for (unsigned i = ValNo; i < ValNo+NC; ++i) {
const Value *V = Plane[i];
- if (const Constant *C = dyn_cast<Constant>(V)) {
+ if (const Constant *C = dyn_cast<Constant>(V))
outputConstant(C);
- }
+ else
+ outputInlineAsm(cast<InlineAsm>(V));
}
}
static unsigned getEncodedLinkage(const GlobalValue *GV) {
switch (GV->getLinkage()) {
default: assert(0 && "Invalid linkage!");
- case GlobalValue::ExternalLinkage: return 0;
- case GlobalValue::WeakLinkage: return 1;
- case GlobalValue::AppendingLinkage: return 2;
- case GlobalValue::InternalLinkage: return 3;
- case GlobalValue::LinkOnceLinkage: return 4;
+ case GlobalValue::ExternalLinkage: return 0;
+ case GlobalValue::WeakLinkage: return 1;
+ case GlobalValue::AppendingLinkage: return 2;
+ case GlobalValue::InternalLinkage: return 3;
+ case GlobalValue::LinkOnceLinkage: return 4;
+ case GlobalValue::DLLImportLinkage: return 5;
+ case GlobalValue::DLLExportLinkage: return 6;
+ case GlobalValue::ExternalWeakLinkage: return 7;
}
}
void BytecodeWriter::outputModuleInfoBlock(const Module *M) {
BytecodeBlock ModuleInfoBlock(BytecodeFormat::ModuleGlobalInfoBlockID, *this);
+ // Give numbers to sections as we encounter them.
+ unsigned SectionIDCounter = 0;
+ std::vector<std::string> SectionNames;
+ std::map<std::string, unsigned> SectionID;
+
// Output the types for the global variables in the module...
for (Module::const_global_iterator I = M->global_begin(),
- End = M->global_end(); I != End;++I) {
+ End = M->global_end(); I != End; ++I) {
int Slot = Table.getSlot(I->getType());
assert(Slot != -1 && "Module global vars is broken!");
+ assert((I->hasInitializer() || !I->hasInternalLinkage()) &&
+ "Global must have an initializer or have external linkage!");
+
// Fields: bit0 = isConstant, bit1 = hasInitializer, bit2-4=Linkage,
- // bit5+ = Slot # for type
- unsigned oSlot = ((unsigned)Slot << 5) | (getEncodedLinkage(I) << 2) |
- (I->hasInitializer() << 1) | (unsigned)I->isConstant();
- output_vbr(oSlot);
+ // bit5+ = Slot # for type.
+ bool HasExtensionWord = (I->getAlignment() != 0) || I->hasSection();
+
+ // If we need to use the extension byte, set linkage=3(internal) and
+ // initializer = 0 (impossible!).
+ if (!HasExtensionWord) {
+ unsigned oSlot = ((unsigned)Slot << 5) | (getEncodedLinkage(I) << 2) |
+ (I->hasInitializer() << 1) | (unsigned)I->isConstant();
+ output_vbr(oSlot);
+ } else {
+ unsigned oSlot = ((unsigned)Slot << 5) | (3 << 2) |
+ (0 << 1) | (unsigned)I->isConstant();
+ output_vbr(oSlot);
+
+ // The extension word has this format: bit 0 = has initializer, bit 1-3 =
+ // linkage, bit 4-8 = alignment (log2), bit 9 = has SectionID,
+ // bits 10+ = future use.
+ unsigned ExtWord = (unsigned)I->hasInitializer() |
+ (getEncodedLinkage(I) << 1) |
+ ((Log2_32(I->getAlignment())+1) << 4) |
+ ((unsigned)I->hasSection() << 9);
+ output_vbr(ExtWord);
+ if (I->hasSection()) {
+ // Give section names unique ID's.
+ unsigned &Entry = SectionID[I->getSection()];
+ if (Entry == 0) {
+ Entry = ++SectionIDCounter;
+ SectionNames.push_back(I->getSection());
+ }
+ output_vbr(Entry);
+ }
+ }
// If we have an initializer, output it now.
if (I->hasInitializer()) {
int Slot = Table.getSlot(I->getType());
assert(Slot != -1 && "Module slot calculator is broken!");
assert(Slot >= Type::FirstDerivedTyID && "Derived type not in range!");
- assert(((Slot << 5) >> 5) == Slot && "Slot # too big!");
- unsigned ID = (Slot << 5);
-
- if (I->getCallingConv() < 15)
- ID += I->getCallingConv()+1;
+ assert(((Slot << 6) >> 6) == Slot && "Slot # too big!");
+ unsigned CC = I->getCallingConv()+1;
+ unsigned ID = (Slot << 5) | (CC & 15);
if (I->isExternal()) // If external, we don't have an FunctionInfo block.
ID |= 1 << 4;
+
+ if (I->getAlignment() || I->hasSection() || (CC & ~15) != 0 ||
+ (I->isExternal() && I->hasDLLImportLinkage()) ||
+ (I->isExternal() && I->hasExternalWeakLinkage())
+ )
+ ID |= 1 << 31; // Do we need an extension word?
+
output_vbr(ID);
+
+ if (ID & (1 << 31)) {
+ // Extension byte: bits 0-4 = alignment, bits 5-9 = top nibble of calling
+ // convention, bit 10 = hasSectionID., bits 11-12 = external linkage type
+ unsigned extLinkage = 0;
+
+ if (I->isExternal()) {
+ if (I->hasDLLImportLinkage()) {
+ extLinkage = 1;
+ } else if (I->hasExternalWeakLinkage()) {
+ extLinkage = 2;
+ }
+ }
- if (I->getCallingConv() >= 15)
- output_vbr(I->getCallingConv());
+ ID = (Log2_32(I->getAlignment())+1) | ((CC >> 4) << 5) |
+ (I->hasSection() << 10) |
+ ((extLinkage & 3) << 11);
+ output_vbr(ID);
+
+ // Give section names unique ID's.
+ if (I->hasSection()) {
+ unsigned &Entry = SectionID[I->getSection()];
+ if (Entry == 0) {
+ Entry = ++SectionIDCounter;
+ SectionNames.push_back(I->getSection());
+ }
+ output_vbr(Entry);
+ }
+ }
}
output_vbr((unsigned)Table.getSlot(Type::VoidTy) << 5);
// Output the target triple from the module
output(M->getTargetTriple());
+
+ // Emit the table of section names.
+ output_vbr((unsigned)SectionNames.size());
+ for (unsigned i = 0, e = SectionNames.size(); i != e; ++i)
+ output(SectionNames[i]);
+
+ // Output the inline asm string.
+ output(M->getModuleInlineAsm());
}
void BytecodeWriter::outputInstructions(const Function *F) {
// The compaction types may have been uncompactified back to the
// global types. If so, we just write an empty table
- if (CTypes.size() == 0 ) {
+ if (CTypes.size() == 0) {
output_vbr(0U);
return;
}
// Write each of the types
for (SymbolTable::type_const_iterator TI = MST.type_begin(),
- TE = MST.type_end(); TI != TE; ++TI ) {
+ TE = MST.type_end(); TI != TE; ++TI) {
// Symtab entry:[def slot #][name]
output_typeid((unsigned)Table.getSlot(TI->second));
output(TI->first);
}
void llvm::WriteBytecodeToFile(const Module *M, std::ostream &Out,
- bool compress ) {
+ bool compress) {
assert(M && "You can't write a null module!!");
+ // Make sure that std::cout is put into binary mode for systems
+ // that care.
+ if (&Out == std::cout)
+ sys::Program::ChangeStdoutToBinary();
+
// Create a vector of unsigned char for the bytecode output. We
// reserve 256KBytes of space in the vector so that we avoid doing
// lots of little allocations. 256KBytes is sufficient for a large
// make sure it hits disk now
Out.flush();
}
-
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