//===----------------------------------------------------------------------===//
#include "CTargetMachine.h"
+#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/SymbolTable.h"
#include "llvm/Intrinsics.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/InlineAsm.h"
#include "llvm/Analysis/ConstantsScanner.h"
#include "llvm/Analysis/FindUsedTypes.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/CodeGen/IntrinsicLowering.h"
#include "llvm/Transforms/Scalar.h"
#include "llvm/Target/TargetMachineRegistry.h"
+#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Support/CallSite.h"
#include "llvm/Support/CFG.h"
#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Config/config.h"
#include <algorithm>
-#include <iostream>
-#include <sstream>
+#include <ios>
using namespace llvm;
namespace {
// Register the target.
RegisterTarget<CTargetMachine> X("c", " C backend");
- /// NameAllUsedStructs - This pass inserts names for any unnamed structure
- /// types that are used by the program.
+ /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
+ /// any unnamed structure types that are used by the program, and merges
+ /// external functions with the same name.
///
- class CBackendNameAllUsedStructs : public ModulePass {
+ class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<FindUsedTypes>();
}
/// module to a C translation unit.
class CWriter : public FunctionPass, public InstVisitor<CWriter> {
std::ostream &Out;
- IntrinsicLowering &IL;
+ IntrinsicLowering IL;
Mangler *Mang;
LoopInfo *LI;
const Module *TheModule;
+ const TargetAsmInfo* TAsm;
std::map<const Type *, std::string> TypeNames;
std::map<const ConstantFP *, unsigned> FPConstantMap;
public:
- CWriter(std::ostream &o, IntrinsicLowering &il) : Out(o), IL(il) {}
+ CWriter(std::ostream &o) : Out(o), TAsm(0) {}
virtual const char *getPassName() const { return "C backend"; }
const std::string &VariableName = "",
bool IgnoreName = false);
+ void printStructReturnPointerFunctionType(std::ostream &Out,
+ const PointerType *Ty);
+
void writeOperand(Value *Operand);
+ void writeOperandRaw(Value *Operand);
void writeOperandInternal(Value *Operand);
+ void writeOperandWithCast(Value* Operand, unsigned Opcode);
+ bool writeInstructionCast(const Instruction &I);
private :
+ std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
+
void lowerIntrinsics(Function &F);
- bool nameAllUsedStructureTypes(Module &M);
void printModule(Module *M);
void printModuleTypes(const SymbolTable &ST);
void printContainedStructs(const Type *Ty, std::set<const StructType *> &);
void printBasicBlock(BasicBlock *BB);
void printLoop(Loop *L);
+ void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
void printConstant(Constant *CPV);
+ void printConstantWithCast(Constant *CPV, unsigned Opcode);
+ bool printConstExprCast(const ConstantExpr *CE);
void printConstantArray(ConstantArray *CPA);
+ void printConstantPacked(ConstantPacked *CP);
// isInlinableInst - Attempt to inline instructions into their uses to build
// trees as much as possible. To do this, we have to consistently decide
// Don't inline a load across a store or other bad things!
return false;
+ // Must not be used in inline asm
+ if (I.hasOneUse() && isInlineAsm(*I.use_back())) return false;
+
// Only inline instruction it it's use is in the same BB as the inst.
return I.getParent() == cast<Instruction>(I.use_back())->getParent();
}
return 0;
return AI;
}
-
+
+ // isInlineAsm - Check if the instruction is a call to an inline asm chunk
+ static bool isInlineAsm(const Instruction& I) {
+ if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
+ return true;
+ return false;
+ }
+
// Instruction visitation functions
friend class InstVisitor<CWriter>;
void visitCastInst (CastInst &I);
void visitSelectInst(SelectInst &I);
void visitCallInst (CallInst &I);
+ void visitInlineAsm(CallInst &I);
void visitShiftInst(ShiftInst &I) { visitBinaryOperator(I); }
void visitMallocInst(MallocInst &I);
void visitVAArgInst (VAArgInst &I);
void visitInstruction(Instruction &I) {
- std::cerr << "C Writer does not know about " << I;
+ cerr << "C Writer does not know about " << I;
abort();
}
/// the program, and removes names from structure types that are not used by the
/// program.
///
-bool CBackendNameAllUsedStructs::runOnModule(Module &M) {
+bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
// Get a set of types that are used by the program...
std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
++RenameCounter;
Changed = true;
}
+
+
+ // Loop over all external functions and globals. If we have two with
+ // identical names, merge them.
+ // FIXME: This code should disappear when we don't allow values with the same
+ // names when they have different types!
+ std::map<std::string, GlobalValue*> ExtSymbols;
+ for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
+ Function *GV = I++;
+ if (GV->isExternal() && GV->hasName()) {
+ std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
+ = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
+ if (!X.second) {
+ // Found a conflict, replace this global with the previous one.
+ GlobalValue *OldGV = X.first->second;
+ GV->replaceAllUsesWith(ConstantExpr::getCast(OldGV, GV->getType()));
+ GV->eraseFromParent();
+ Changed = true;
+ }
+ }
+ }
+ // Do the same for globals.
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E;) {
+ GlobalVariable *GV = I++;
+ if (GV->isExternal() && GV->hasName()) {
+ std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
+ = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
+ if (!X.second) {
+ // Found a conflict, replace this global with the previous one.
+ GlobalValue *OldGV = X.first->second;
+ GV->replaceAllUsesWith(ConstantExpr::getCast(OldGV, GV->getType()));
+ GV->eraseFromParent();
+ Changed = true;
+ }
+ }
+ }
+
return Changed;
}
+/// printStructReturnPointerFunctionType - This is like printType for a struct
+/// return type, except, instead of printing the type as void (*)(Struct*, ...)
+/// print it as "Struct (*)(...)", for struct return functions.
+void CWriter::printStructReturnPointerFunctionType(std::ostream &Out,
+ const PointerType *TheTy) {
+ const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
+ std::stringstream FunctionInnards;
+ FunctionInnards << " (*) (";
+ bool PrintedType = false;
+
+ FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
+ const Type *RetTy = cast<PointerType>(I->get())->getElementType();
+ for (++I; I != E; ++I) {
+ if (PrintedType)
+ FunctionInnards << ", ";
+ printType(FunctionInnards, *I, "");
+ PrintedType = true;
+ }
+ if (FTy->isVarArg()) {
+ if (PrintedType)
+ FunctionInnards << ", ...";
+ } else if (!PrintedType) {
+ FunctionInnards << "void";
+ }
+ FunctionInnards << ')';
+ std::string tstr = FunctionInnards.str();
+ printType(Out, RetTy, tstr);
+}
+
// Pass the Type* and the variable name and this prints out the variable
// declaration.
case Type::FloatTyID: return Out << "float " << NameSoFar;
case Type::DoubleTyID: return Out << "double " << NameSoFar;
default :
- std::cerr << "Unknown primitive type: " << *Ty << "\n";
+ cerr << "Unknown primitive type: " << *Ty << "\n";
abort();
}
switch (Ty->getTypeID()) {
case Type::FunctionTyID: {
- const FunctionType *MTy = cast<FunctionType>(Ty);
+ const FunctionType *FTy = cast<FunctionType>(Ty);
std::stringstream FunctionInnards;
FunctionInnards << " (" << NameSoFar << ") (";
- for (FunctionType::param_iterator I = MTy->param_begin(),
- E = MTy->param_end(); I != E; ++I) {
- if (I != MTy->param_begin())
+ for (FunctionType::param_iterator I = FTy->param_begin(),
+ E = FTy->param_end(); I != E; ++I) {
+ if (I != FTy->param_begin())
FunctionInnards << ", ";
printType(FunctionInnards, *I, "");
}
- if (MTy->isVarArg()) {
- if (MTy->getNumParams())
+ if (FTy->isVarArg()) {
+ if (FTy->getNumParams())
FunctionInnards << ", ...";
- } else if (!MTy->getNumParams()) {
+ } else if (!FTy->getNumParams()) {
FunctionInnards << "void";
}
FunctionInnards << ')';
std::string tstr = FunctionInnards.str();
- printType(Out, MTy->getReturnType(), tstr);
+ printType(Out, FTy->getReturnType(), tstr);
return Out;
}
case Type::StructTyID: {
const PointerType *PTy = cast<PointerType>(Ty);
std::string ptrName = "*" + NameSoFar;
- if (isa<ArrayType>(PTy->getElementType()))
+ if (isa<ArrayType>(PTy->getElementType()) ||
+ isa<PackedType>(PTy->getElementType()))
ptrName = "(" + ptrName + ")";
return printType(Out, PTy->getElementType(), ptrName);
NameSoFar + "[" + utostr(NumElements) + "]");
}
+ case Type::PackedTyID: {
+ const PackedType *PTy = cast<PackedType>(Ty);
+ unsigned NumElements = PTy->getNumElements();
+ if (NumElements == 0) NumElements = 1;
+ return printType(Out, PTy->getElementType(),
+ NameSoFar + "[" + utostr(NumElements) + "]");
+ }
+
case Type::OpaqueTyID: {
static int Count = 0;
std::string TyName = "struct opaque_" + itostr(Count++);
// Do not include the last character, which we know is null
for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
- unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getRawValue();
+ unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
// Print it out literally if it is a printable character. The only thing
// to be careful about is when the last letter output was a hex escape
}
}
+void CWriter::printConstantPacked(ConstantPacked *CP) {
+ Out << '{';
+ if (CP->getNumOperands()) {
+ Out << ' ';
+ printConstant(cast<Constant>(CP->getOperand(0)));
+ for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
+ Out << ", ";
+ printConstant(cast<Constant>(CP->getOperand(i)));
+ }
+ }
+ Out << " }";
+}
+
// isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
// textually as a double (rather than as a reference to a stack-allocated
// variable). We decide this by converting CFP to a string and back into a
// only deal in IEEE FP).
//
static bool isFPCSafeToPrint(const ConstantFP *CFP) {
-#if HAVE_PRINTF_A
+#if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
char Buffer[100];
sprintf(Buffer, "%a", CFP->getValue());
#endif
}
+/// Print out the casting for a cast operation. This does the double casting
+/// necessary for conversion to the destination type, if necessary.
+/// @returns true if a closing paren is necessary
+/// @brief Print a cast
+void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
+ Out << '(';
+ printType(Out, DstTy);
+ Out << ')';
+ switch (opc) {
+ case Instruction::UIToFP:
+ case Instruction::ZExt:
+ if (SrcTy->isSigned()) {
+ Out << '(';
+ printType(Out, SrcTy->getUnsignedVersion());
+ Out << ')';
+ }
+ break;
+ case Instruction::SIToFP:
+ case Instruction::SExt:
+ if (SrcTy->isUnsigned()) {
+ Out << '(';
+ printType(Out, SrcTy->getSignedVersion());
+ Out << ')';
+ }
+ break;
+ case Instruction::IntToPtr:
+ case Instruction::PtrToInt:
+ // Avoid "cast to pointer from integer of different size" warnings
+ Out << "(unsigned long)";
+ break;
+ case Instruction::Trunc:
+ case Instruction::BitCast:
+ case Instruction::FPExt:
+ case Instruction::FPTrunc:
+ case Instruction::FPToSI:
+ case Instruction::FPToUI:
+ default:
+ break;
+ }
+}
+
// printConstant - The LLVM Constant to C Constant converter.
void CWriter::printConstant(Constant *CPV) {
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
switch (CE->getOpcode()) {
- case Instruction::Cast:
- Out << "((";
- printType(Out, CPV->getType());
- Out << ')';
+ 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:
+ case Instruction::PtrToInt:
+ case Instruction::IntToPtr:
+ case Instruction::BitCast:
+ Out << "(";
+ printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
+ if (CE->getOpcode() == Instruction::SExt &&
+ CE->getOperand(0)->getType() == Type::BoolTy) {
+ // Make sure we really sext from bool here by subtracting from 0
+ Out << "0-";
+ }
printConstant(CE->getOperand(0));
+ if (CE->getType() == Type::BoolTy &&
+ (CE->getOpcode() == Instruction::Trunc ||
+ CE->getOpcode() == Instruction::FPToUI ||
+ CE->getOpcode() == Instruction::FPToSI ||
+ CE->getOpcode() == Instruction::PtrToInt)) {
+ // Make sure we really truncate to bool here by anding with 1
+ Out << "&1u";
+ }
Out << ')';
return;
case Instruction::Add:
case Instruction::Sub:
case Instruction::Mul:
- case Instruction::Div:
- case Instruction::Rem:
+ case Instruction::SDiv:
+ case Instruction::UDiv:
+ case Instruction::FDiv:
+ case Instruction::URem:
+ case Instruction::SRem:
+ case Instruction::FRem:
case Instruction::And:
case Instruction::Or:
case Instruction::Xor:
case Instruction::SetGT:
case Instruction::SetGE:
case Instruction::Shl:
- case Instruction::Shr:
+ case Instruction::LShr:
+ case Instruction::AShr:
+ {
Out << '(';
- printConstant(CE->getOperand(0));
+ bool NeedsClosingParens = printConstExprCast(CE);
+ printConstantWithCast(CE->getOperand(0), CE->getOpcode());
switch (CE->getOpcode()) {
case Instruction::Add: Out << " + "; break;
case Instruction::Sub: Out << " - "; break;
case Instruction::Mul: Out << " * "; break;
- case Instruction::Div: Out << " / "; break;
- case Instruction::Rem: Out << " % "; break;
+ case Instruction::URem:
+ case Instruction::SRem:
+ case Instruction::FRem: Out << " % "; break;
+ case Instruction::UDiv:
+ case Instruction::SDiv:
+ case Instruction::FDiv: Out << " / "; break;
case Instruction::And: Out << " & "; break;
case Instruction::Or: Out << " | "; break;
case Instruction::Xor: Out << " ^ "; break;
case Instruction::SetGT: Out << " > "; break;
case Instruction::SetGE: Out << " >= "; break;
case Instruction::Shl: Out << " << "; break;
- case Instruction::Shr: Out << " >> "; break;
+ case Instruction::LShr:
+ case Instruction::AShr: Out << " >> "; break;
default: assert(0 && "Illegal opcode here!");
}
- printConstant(CE->getOperand(1));
+ printConstantWithCast(CE->getOperand(1), CE->getOpcode());
+ if (NeedsClosingParens)
+ Out << "))";
Out << ')';
return;
+ }
default:
- std::cerr << "CWriter Error: Unhandled constant expression: "
- << *CE << "\n";
+ cerr << "CWriter Error: Unhandled constant expression: "
+ << *CE << "\n";
abort();
}
} else if (isa<UndefValue>(CPV) && CPV->getType()->isFirstClassType()) {
switch (CPV->getType()->getTypeID()) {
case Type::BoolTyID:
- Out << (CPV == ConstantBool::False ? '0' : '1'); break;
+ Out << (cast<ConstantBool>(CPV)->getValue() ? '1' : '0');
+ break;
case Type::SByteTyID:
case Type::ShortTyID:
- Out << cast<ConstantSInt>(CPV)->getValue(); break;
+ Out << cast<ConstantInt>(CPV)->getSExtValue();
+ break;
case Type::IntTyID:
- if ((int)cast<ConstantSInt>(CPV)->getValue() == (int)0x80000000)
+ if ((int)cast<ConstantInt>(CPV)->getSExtValue() == (int)0x80000000)
Out << "((int)0x80000000U)"; // Handle MININT specially to avoid warning
else
- Out << cast<ConstantSInt>(CPV)->getValue();
+ Out << cast<ConstantInt>(CPV)->getSExtValue();
break;
case Type::LongTyID:
- if (cast<ConstantSInt>(CPV)->isMinValue())
+ if (cast<ConstantInt>(CPV)->isMinValue(true))
Out << "(/*INT64_MIN*/(-9223372036854775807LL)-1)";
else
- Out << cast<ConstantSInt>(CPV)->getValue() << "ll"; break;
+ Out << cast<ConstantInt>(CPV)->getSExtValue() << "ll";
+ break;
case Type::UByteTyID:
case Type::UShortTyID:
- Out << cast<ConstantUInt>(CPV)->getValue(); break;
+ Out << cast<ConstantInt>(CPV)->getZExtValue();
+ break;
case Type::UIntTyID:
- Out << cast<ConstantUInt>(CPV)->getValue() << 'u'; break;
+ Out << cast<ConstantInt>(CPV)->getZExtValue() << 'u';
+ break;
case Type::ULongTyID:
- Out << cast<ConstantUInt>(CPV)->getValue() << "ull"; break;
+ Out << cast<ConstantInt>(CPV)->getZExtValue() << "ull";
+ break;
case Type::FloatTyID:
case Type::DoubleTyID: {
// The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
// it's 0x7ff4.
const unsigned long QuietNaN = 0x7ff8UL;
- const unsigned long SignalNaN = 0x7ff4UL;
+ //const unsigned long SignalNaN = 0x7ff4UL;
// We need to grab the first part of the FP #
char Buffer[100];
uint64_t ll = DoubleToBits(FPC->getValue());
- sprintf(Buffer, "0x%llx", (unsigned long long)ll);
+ sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
std::string Num(&Buffer[0], &Buffer[6]);
unsigned long Val = strtoul(Num.c_str(), 0, 16);
<< " /*inf*/ ";
} else {
std::string Num;
-#if HAVE_PRINTF_A
+#if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
// Print out the constant as a floating point number.
char Buffer[100];
sprintf(Buffer, "%a", FPC->getValue());
}
break;
+ case Type::PackedTyID:
+ if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
+ const PackedType *AT = cast<PackedType>(CPV->getType());
+ Out << '{';
+ if (AT->getNumElements()) {
+ Out << ' ';
+ Constant *CZ = Constant::getNullValue(AT->getElementType());
+ printConstant(CZ);
+ for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
+ Out << ", ";
+ printConstant(CZ);
+ }
+ }
+ Out << " }";
+ } else {
+ printConstantPacked(cast<ConstantPacked>(CPV));
+ }
+ break;
+
case Type::StructTyID:
if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
const StructType *ST = cast<StructType>(CPV->getType());
}
// FALL THROUGH
default:
- std::cerr << "Unknown constant type: " << *CPV << "\n";
+ cerr << "Unknown constant type: " << *CPV << "\n";
abort();
}
}
+// Some constant expressions need to be casted back to the original types
+// because their operands were casted to the expected type. This function takes
+// care of detecting that case and printing the cast for the ConstantExpr.
+bool CWriter::printConstExprCast(const ConstantExpr* CE) {
+ bool NeedsExplicitCast = false;
+ const Type *Ty = CE->getOperand(0)->getType();
+ switch (CE->getOpcode()) {
+ case Instruction::LShr:
+ case Instruction::URem:
+ case Instruction::UDiv:
+ NeedsExplicitCast = Ty->isSigned(); break;
+ case Instruction::AShr:
+ case Instruction::SRem:
+ case Instruction::SDiv:
+ NeedsExplicitCast = Ty->isUnsigned(); break;
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::Trunc:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ case Instruction::PtrToInt:
+ case Instruction::IntToPtr:
+ case Instruction::BitCast:
+ Ty = CE->getType();
+ NeedsExplicitCast = true;
+ break;
+ default: break;
+ }
+ if (NeedsExplicitCast) {
+ Out << "((";
+ printType(Out, Ty);
+ Out << ")(";
+ }
+ return NeedsExplicitCast;
+}
+
+// Print a constant assuming that it is the operand for a given Opcode. The
+// opcodes that care about sign need to cast their operands to the expected
+// type before the operation proceeds. This function does the casting.
+void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
+
+ // Extract the operand's type, we'll need it.
+ const Type* OpTy = CPV->getType();
+
+ // Indicate whether to do the cast or not.
+ bool shouldCast = false;
+
+ // Based on the Opcode for which this Constant is being written, determine
+ // the new type to which the operand should be casted by setting the value
+ // of OpTy. If we change OpTy, also set shouldCast to true so it gets
+ // casted below.
+ switch (Opcode) {
+ default:
+ // for most instructions, it doesn't matter
+ break;
+ case Instruction::LShr:
+ case Instruction::UDiv:
+ case Instruction::URem:
+ // For UDiv/URem get correct type
+ if (OpTy->isSigned()) {
+ OpTy = OpTy->getUnsignedVersion();
+ shouldCast = true;
+ }
+ break;
+ case Instruction::AShr:
+ case Instruction::SDiv:
+ case Instruction::SRem:
+ // For SDiv/SRem get correct type
+ if (OpTy->isUnsigned()) {
+ OpTy = OpTy->getSignedVersion();
+ shouldCast = true;
+ }
+ break;
+ }
+
+ // Write out the casted constant if we should, otherwise just write the
+ // operand.
+ if (shouldCast) {
+ Out << "((";
+ printType(Out, OpTy);
+ Out << ")";
+ printConstant(CPV);
+ Out << ")";
+ } else
+ writeOperand(CPV);
+
+}
+
void CWriter::writeOperandInternal(Value *Operand) {
if (Instruction *I = dyn_cast<Instruction>(Operand))
if (isInlinableInst(*I) && !isDirectAlloca(I)) {
}
}
+void CWriter::writeOperandRaw(Value *Operand) {
+ Constant* CPV = dyn_cast<Constant>(Operand);
+ if (CPV && !isa<GlobalValue>(CPV)) {
+ printConstant(CPV);
+ } else {
+ Out << Mang->getValueName(Operand);
+ }
+}
+
void CWriter::writeOperand(Value *Operand) {
if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
- Out << "(&"; // Global variables are references as their addresses by llvm
+ Out << "(&"; // Global variables are referenced as their addresses by llvm
writeOperandInternal(Operand);
Out << ')';
}
+// Some instructions need to have their result value casted back to the
+// original types because their operands were casted to the expected type.
+// This function takes care of detecting that case and printing the cast
+// for the Instruction.
+bool CWriter::writeInstructionCast(const Instruction &I) {
+ bool NeedsExplicitCast = false;
+ const Type *Ty = I.getOperand(0)->getType();
+ switch (I.getOpcode()) {
+ case Instruction::LShr:
+ case Instruction::URem:
+ case Instruction::UDiv:
+ NeedsExplicitCast = Ty->isSigned(); break;
+ case Instruction::AShr:
+ case Instruction::SRem:
+ case Instruction::SDiv:
+ NeedsExplicitCast = Ty->isUnsigned(); break;
+ case Instruction::ZExt:
+ case Instruction::SExt:
+ case Instruction::Trunc:
+ case Instruction::FPTrunc:
+ case Instruction::FPExt:
+ case Instruction::UIToFP:
+ case Instruction::SIToFP:
+ case Instruction::FPToUI:
+ case Instruction::FPToSI:
+ case Instruction::PtrToInt:
+ case Instruction::IntToPtr:
+ case Instruction::BitCast:
+ Ty = I.getType();
+ NeedsExplicitCast = true;
+ break;
+ default: break;
+ }
+ if (NeedsExplicitCast) {
+ Out << "((";
+ printType(Out, Ty);
+ Out << ")(";
+ }
+ return NeedsExplicitCast;
+}
+
+// Write the operand with a cast to another type based on the Opcode being used.
+// This will be used in cases where an instruction has specific type
+// requirements (usually signedness) for its operands.
+void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
+
+ // Extract the operand's type, we'll need it.
+ const Type* OpTy = Operand->getType();
+
+ // Indicate whether to do the cast or not.
+ bool shouldCast = false;
+
+ // Based on the Opcode for which this Operand is being written, determine
+ // the new type to which the operand should be casted by setting the value
+ // of OpTy. If we change OpTy, also set shouldCast to true.
+ switch (Opcode) {
+ default:
+ // for most instructions, it doesn't matter
+ break;
+ case Instruction::LShr:
+ case Instruction::UDiv:
+ case Instruction::URem:
+ // For UDiv to have unsigned operands
+ if (OpTy->isSigned()) {
+ OpTy = OpTy->getUnsignedVersion();
+ shouldCast = true;
+ }
+ break;
+ case Instruction::AShr:
+ case Instruction::SDiv:
+ case Instruction::SRem:
+ if (OpTy->isUnsigned()) {
+ OpTy = OpTy->getSignedVersion();
+ shouldCast = true;
+ }
+ break;
+ }
+
+ // Write out the casted operand if we should, otherwise just write the
+ // operand.
+ if (shouldCast) {
+ Out << "((";
+ printType(Out, OpTy);
+ Out << ")";
+ writeOperand(Operand);
+ Out << ")";
+ } else
+ writeOperand(Operand);
+
+}
+
// generateCompilerSpecificCode - This is where we add conditional compilation
// directives to cater to specific compilers as need be.
//
static void generateCompilerSpecificCode(std::ostream& Out) {
- // Alloca is hard to get, and we don't want to include stdlib.h here...
+ // Alloca is hard to get, and we don't want to include stdlib.h here.
Out << "/* get a declaration for alloca */\n"
- << "#if defined(__CYGWIN__)\n"
+ << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
<< "extern void *_alloca(unsigned long);\n"
<< "#define alloca(x) _alloca(x)\n"
<< "#elif defined(__APPLE__)\n"
<< "extern void *__builtin_alloca(unsigned int);\n"
<< "#endif\n"
<< "#define alloca(x) __builtin_alloca(x)\n"
- << "#elif defined(__FreeBSD__)\n"
+ << "#elif defined(__FreeBSD__) || defined(__OpenBSD__)\n"
<< "#define alloca(x) __builtin_alloca(x)\n"
<< "#elif !defined(_MSC_VER)\n"
<< "#include <alloca.h>\n"
<< "#define __attribute__(X)\n"
<< "#endif\n\n";
-#if 0
- // At some point, we should support "external weak" vs. "weak" linkages.
// On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
<< "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
<< "#else\n"
<< "#define __EXTERNAL_WEAK__\n"
<< "#endif\n\n";
-#endif
// For now, turn off the weak linkage attribute on Mac OS X. (See above.)
Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
<< "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
<< "#define LLVM_INF __builtin_inf() /* Double */\n"
<< "#define LLVM_INFF __builtin_inff() /* Float */\n"
- << "#define LLVM_PREFETCH(addr,rw,locality) __builtin_prefetch(addr,rw,locality)\n"
+ << "#define LLVM_PREFETCH(addr,rw,locality) "
+ "__builtin_prefetch(addr,rw,locality)\n"
+ << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
+ << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
+ << "#define LLVM_ASM __asm__\n"
<< "#else\n"
<< "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
<< "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
<< "#define LLVM_INF ((double)0.0) /* Double */\n"
<< "#define LLVM_INFF 0.0F /* Float */\n"
<< "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
+ << "#define __ATTRIBUTE_CTOR__\n"
+ << "#define __ATTRIBUTE_DTOR__\n"
+ << "#define LLVM_ASM(X)\n"
<< "#endif\n\n";
// Output target-specific code that should be inserted into main.
Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
// On X86, set the FP control word to 64-bits of precision instead of 80 bits.
Out << "#if defined(__GNUC__) && !defined(__llvm__)\n"
- << "#if defined(i386) || defined(__i386__) || defined(__i386)\n"
+ << "#if defined(i386) || defined(__i386__) || defined(__i386) || "
+ << "defined(__x86_64__)\n"
<< "#undef CODE_FOR_MAIN\n"
<< "#define CODE_FOR_MAIN() \\\n"
<< " {short F;__asm__ (\"fnstcw %0\" : \"=m\" (*&F)); \\\n"
}
+/// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
+/// the StaticTors set.
+static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
+ ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
+ if (!InitList) return;
+
+ for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
+ if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
+ if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
+
+ if (CS->getOperand(1)->isNullValue())
+ return; // Found a null terminator, exit printing.
+ Constant *FP = CS->getOperand(1);
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
+ if (CE->isCast())
+ FP = CE->getOperand(0);
+ if (Function *F = dyn_cast<Function>(FP))
+ StaticTors.insert(F);
+ }
+}
+
+enum SpecialGlobalClass {
+ NotSpecial = 0,
+ GlobalCtors, GlobalDtors,
+ NotPrinted
+};
+
+/// getGlobalVariableClass - If this is a global that is specially recognized
+/// by LLVM, return a code that indicates how we should handle it.
+static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
+ // If this is a global ctors/dtors list, handle it now.
+ if (GV->hasAppendingLinkage() && GV->use_empty()) {
+ if (GV->getName() == "llvm.global_ctors")
+ return GlobalCtors;
+ else if (GV->getName() == "llvm.global_dtors")
+ return GlobalDtors;
+ }
+
+ // Otherwise, it it is other metadata, don't print it. This catches things
+ // like debug information.
+ if (GV->getSection() == "llvm.metadata")
+ return NotPrinted;
+
+ return NotSpecial;
+}
+
+
bool CWriter::doInitialization(Module &M) {
// Initialize
TheModule = &M;
// Ensure that all structure types have names...
Mang = new Mangler(M);
-
+ Mang->markCharUnacceptable('.');
+
+ // Keep track of which functions are static ctors/dtors so they can have
+ // an attribute added to their prototypes.
+ std::set<Function*> StaticCtors, StaticDtors;
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I) {
+ switch (getGlobalVariableClass(I)) {
+ default: break;
+ case GlobalCtors:
+ FindStaticTors(I, StaticCtors);
+ break;
+ case GlobalDtors:
+ FindStaticTors(I, StaticDtors);
+ break;
+ }
+ }
+
// get declaration for alloca
Out << "/* Provide Declarations */\n";
Out << "#include <stdarg.h>\n"; // Varargs support
// Global variable declarations...
if (!M.global_empty()) {
Out << "\n/* External Global Variable Declarations */\n";
- for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I) {
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I) {
if (I->hasExternalLinkage()) {
Out << "extern ";
printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
Out << ";\n";
+ } else if (I->hasDLLImportLinkage()) {
+ Out << "__declspec(dllimport) ";
+ printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
+ Out << ";\n";
+ } else if (I->hasExternalWeakLinkage()) {
+ Out << "extern ";
+ printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
+ Out << " __EXTERNAL_WEAK__ ;\n";
}
}
}
// Function declarations
+ Out << "\n/* Function Declarations */\n";
Out << "double fmod(double, double);\n"; // Support for FP rem
Out << "float fmodf(float, float);\n";
- if (!M.empty()) {
- Out << "\n/* Function Declarations */\n";
- for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
- // Don't print declarations for intrinsic functions.
- if (!I->getIntrinsicID() &&
- I->getName() != "setjmp" && I->getName() != "longjmp") {
- printFunctionSignature(I, true);
- if (I->hasWeakLinkage()) Out << " __ATTRIBUTE_WEAK__";
- if (I->hasLinkOnceLinkage()) Out << " __ATTRIBUTE_WEAK__";
- Out << ";\n";
- }
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
+ // Don't print declarations for intrinsic functions.
+ if (!I->getIntrinsicID() && I->getName() != "setjmp" &&
+ I->getName() != "longjmp" && I->getName() != "_setjmp") {
+ if (I->hasExternalWeakLinkage())
+ Out << "extern ";
+ printFunctionSignature(I, true);
+ if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
+ Out << " __ATTRIBUTE_WEAK__";
+ if (I->hasExternalWeakLinkage())
+ Out << " __EXTERNAL_WEAK__";
+ if (StaticCtors.count(I))
+ Out << " __ATTRIBUTE_CTOR__";
+ if (StaticDtors.count(I))
+ Out << " __ATTRIBUTE_DTOR__";
+
+ if (I->hasName() && I->getName()[0] == 1)
+ Out << " LLVM_ASM(\"" << I->getName().c_str()+1 << "\")";
+
+ Out << ";\n";
}
}
// Output the global variable declarations
if (!M.global_empty()) {
Out << "\n\n/* Global Variable Declarations */\n";
- for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
if (!I->isExternal()) {
+ // Ignore special globals, such as debug info.
+ if (getGlobalVariableClass(I))
+ continue;
+
if (I->hasInternalLinkage())
Out << "static ";
else
Out << " __attribute__((common))";
else if (I->hasWeakLinkage())
Out << " __ATTRIBUTE_WEAK__";
+ else if (I->hasExternalWeakLinkage())
+ Out << " __EXTERNAL_WEAK__";
Out << ";\n";
}
}
// Output the global variable definitions and contents...
if (!M.global_empty()) {
Out << "\n\n/* Global Variable Definitions and Initialization */\n";
- for (Module::global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
+ for (Module::global_iterator I = M.global_begin(), E = M.global_end();
+ I != E; ++I)
if (!I->isExternal()) {
+ // Ignore special globals, such as debug info.
+ if (getGlobalVariableClass(I))
+ continue;
+
if (I->hasInternalLinkage())
Out << "static ";
+ else if (I->hasDLLImportLinkage())
+ Out << "__declspec(dllimport) ";
+ else if (I->hasDLLExportLinkage())
+ Out << "__declspec(dllexport) ";
+
printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
if (I->hasLinkOnceLinkage())
Out << " __attribute__((common))";
// the compiler figure out the rest of the zeros.
Out << " = " ;
if (isa<StructType>(I->getInitializer()->getType()) ||
- isa<ArrayType>(I->getInitializer()->getType())) {
+ isa<ArrayType>(I->getInitializer()->getType()) ||
+ isa<PackedType>(I->getInitializer()->getType())) {
Out << "{ 0 }";
} else {
// Just print it out normally.
/// printSymbolTable - Run through symbol table looking for type names. If a
-/// type name is found, emit it's declaration...
+/// type name is found, emit its declaration...
///
void CWriter::printModuleTypes(const SymbolTable &ST) {
// We are only interested in the type plane of the symbol table.
// Push the struct onto the stack and recursively push all structs
// this one depends on.
+//
+// TODO: Make this work properly with packed types
+//
void CWriter::printContainedStructs(const Type *Ty,
std::set<const StructType*> &StructPrinted){
+ // Don't walk through pointers.
+ if (isa<PointerType>(Ty) || Ty->isPrimitiveType()) return;
+
+ // Print all contained types first.
+ for (Type::subtype_iterator I = Ty->subtype_begin(),
+ E = Ty->subtype_end(); I != E; ++I)
+ printContainedStructs(*I, StructPrinted);
+
if (const StructType *STy = dyn_cast<StructType>(Ty)) {
- //Check to see if we have already printed this struct
- if (StructPrinted.count(STy) == 0) {
- // Print all contained types first...
- for (StructType::element_iterator I = STy->element_begin(),
- E = STy->element_end(); I != E; ++I) {
- const Type *Ty1 = I->get();
- if (isa<StructType>(Ty1) || isa<ArrayType>(Ty1))
- printContainedStructs(*I, StructPrinted);
- }
-
- //Print structure type out..
- StructPrinted.insert(STy);
+ // Check to see if we have already printed this struct.
+ if (StructPrinted.insert(STy).second) {
+ // Print structure type out.
std::string Name = TypeNames[STy];
printType(Out, STy, Name, true);
Out << ";\n\n";
}
-
- // If it is an array, check contained types and continue
- } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)){
- const Type *Ty1 = ATy->getElementType();
- if (isa<StructType>(Ty1) || isa<ArrayType>(Ty1))
- printContainedStructs(Ty1, StructPrinted);
}
}
-
void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
+ /// isCStructReturn - Should this function actually return a struct by-value?
+ bool isCStructReturn = F->getCallingConv() == CallingConv::CSRet;
+
if (F->hasInternalLinkage()) Out << "static ";
-
+ if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
+ if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
+ switch (F->getCallingConv()) {
+ case CallingConv::X86_StdCall:
+ Out << "__stdcall ";
+ break;
+ case CallingConv::X86_FastCall:
+ Out << "__fastcall ";
+ break;
+ }
+
// Loop over the arguments, printing them...
const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
// Print out the name...
FunctionInnards << Mang->getValueName(F) << '(';
+ bool PrintedArg = false;
if (!F->isExternal()) {
if (!F->arg_empty()) {
+ Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
+
+ // If this is a struct-return function, don't print the hidden
+ // struct-return argument.
+ if (isCStructReturn) {
+ assert(I != E && "Invalid struct return function!");
+ ++I;
+ }
+
std::string ArgName;
- if (F->arg_begin()->hasName() || !Prototype)
- ArgName = Mang->getValueName(F->arg_begin());
- printType(FunctionInnards, F->arg_begin()->getType(), ArgName);
- for (Function::const_arg_iterator I = ++F->arg_begin(), E = F->arg_end();
- I != E; ++I) {
- FunctionInnards << ", ";
+ for (; I != E; ++I) {
+ if (PrintedArg) FunctionInnards << ", ";
if (I->hasName() || !Prototype)
ArgName = Mang->getValueName(I);
else
ArgName = "";
printType(FunctionInnards, I->getType(), ArgName);
+ PrintedArg = true;
}
}
} else {
- // Loop over the arguments, printing them...
- for (FunctionType::param_iterator I = FT->param_begin(),
- E = FT->param_end(); I != E; ++I) {
- if (I != FT->param_begin()) FunctionInnards << ", ";
+ // Loop over the arguments, printing them.
+ FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
+
+ // If this is a struct-return function, don't print the hidden
+ // struct-return argument.
+ if (isCStructReturn) {
+ assert(I != E && "Invalid struct return function!");
+ ++I;
+ }
+
+ for (; I != E; ++I) {
+ if (PrintedArg) FunctionInnards << ", ";
printType(FunctionInnards, *I);
+ PrintedArg = true;
}
}
// Finish printing arguments... if this is a vararg function, print the ...,
// unless there are no known types, in which case, we just emit ().
//
- if (FT->isVarArg() && FT->getNumParams()) {
- if (FT->getNumParams()) FunctionInnards << ", ";
+ if (FT->isVarArg() && PrintedArg) {
+ if (PrintedArg) FunctionInnards << ", ";
FunctionInnards << "..."; // Output varargs portion of signature!
- } else if (!FT->isVarArg() && FT->getNumParams() == 0) {
+ } else if (!FT->isVarArg() && !PrintedArg) {
FunctionInnards << "void"; // ret() -> ret(void) in C.
}
FunctionInnards << ')';
- // Print out the return type and the entire signature for that matter
- printType(Out, F->getReturnType(), FunctionInnards.str());
+
+ // Get the return tpe for the function.
+ const Type *RetTy;
+ if (!isCStructReturn)
+ RetTy = F->getReturnType();
+ else {
+ // If this is a struct-return function, print the struct-return type.
+ RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
+ }
+
+ // Print out the return type and the signature built above.
+ printType(Out, RetTy, FunctionInnards.str());
}
void CWriter::printFunction(Function &F) {
printFunctionSignature(&F, false);
Out << " {\n";
+
+ // If this is a struct return function, handle the result with magic.
+ if (F.getCallingConv() == CallingConv::CSRet) {
+ const Type *StructTy =
+ cast<PointerType>(F.arg_begin()->getType())->getElementType();
+ Out << " ";
+ printType(Out, StructTy, "StructReturn");
+ Out << "; /* Struct return temporary */\n";
+
+ Out << " ";
+ printType(Out, F.arg_begin()->getType(), Mang->getValueName(F.arg_begin()));
+ Out << " = &StructReturn;\n";
+ }
+ bool PrintedVar = false;
+
// print local variable information for the function
for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I)
if (const AllocaInst *AI = isDirectAlloca(&*I)) {
Out << " ";
printType(Out, AI->getAllocatedType(), Mang->getValueName(AI));
Out << "; /* Address-exposed local */\n";
+ PrintedVar = true;
} else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
Out << " ";
printType(Out, I->getType(), Mang->getValueName(&*I));
Mang->getValueName(&*I)+"__PHI_TEMPORARY");
Out << ";\n";
}
+ PrintedVar = true;
}
- Out << '\n';
+ if (PrintedVar)
+ Out << '\n';
if (F.hasExternalLinkage() && F.getName() == "main")
Out << " CODE_FOR_MAIN();\n";
for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
++II) {
if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
- if (II->getType() != Type::VoidTy)
+ if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
outputLValue(II);
else
Out << " ";
// necessary because we use the instruction classes as opaque types...
//
void CWriter::visitReturnInst(ReturnInst &I) {
+ // If this is a struct return function, return the temporary struct.
+ if (I.getParent()->getParent()->getCallingConv() == CallingConv::CSRet) {
+ Out << " return StructReturn;\n";
+ return;
+ }
+
// Don't output a void return if this is the last basic block in the function
if (I.getNumOperands() == 0 &&
&*--I.getParent()->getParent()->end() == I.getParent() &&
Out << "-(";
writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
Out << ")";
- } else if (I.getOpcode() == Instruction::Rem &&
- I.getType()->isFloatingPoint()) {
+ } else if (I.getOpcode() == Instruction::FRem) {
// Output a call to fmod/fmodf instead of emitting a%b
if (I.getType() == Type::FloatTy)
Out << "fmodf(";
writeOperand(I.getOperand(1));
Out << ")";
} else {
- writeOperand(I.getOperand(0));
+
+ // Write out the cast of the instruction's value back to the proper type
+ // if necessary.
+ bool NeedsClosingParens = writeInstructionCast(I);
+
+ // Certain instructions require the operand to be forced to a specific type
+ // so we use writeOperandWithCast here instead of writeOperand. Similarly
+ // below for operand 1
+ writeOperandWithCast(I.getOperand(0), I.getOpcode());
switch (I.getOpcode()) {
case Instruction::Add: Out << " + "; break;
case Instruction::Sub: Out << " - "; break;
case Instruction::Mul: Out << '*'; break;
- case Instruction::Div: Out << '/'; break;
- case Instruction::Rem: Out << '%'; break;
+ case Instruction::URem:
+ case Instruction::SRem:
+ case Instruction::FRem: Out << '%'; break;
+ case Instruction::UDiv:
+ case Instruction::SDiv:
+ case Instruction::FDiv: Out << '/'; break;
case Instruction::And: Out << " & "; break;
case Instruction::Or: Out << " | "; break;
case Instruction::Xor: Out << " ^ "; break;
case Instruction::SetLT: Out << " < "; break;
case Instruction::SetGT: Out << " > "; break;
case Instruction::Shl : Out << " << "; break;
- case Instruction::Shr : Out << " >> "; break;
- default: std::cerr << "Invalid operator type!" << I; abort();
+ case Instruction::LShr:
+ case Instruction::AShr: Out << " >> "; break;
+ default: cerr << "Invalid operator type!" << I; abort();
}
- writeOperand(I.getOperand(1));
+ writeOperandWithCast(I.getOperand(1), I.getOpcode());
+ if (NeedsClosingParens)
+ Out << "))";
}
if (needsCast) {
}
void CWriter::visitCastInst(CastInst &I) {
- if (I.getType() == Type::BoolTy) {
- Out << '(';
- writeOperand(I.getOperand(0));
- Out << " != 0)";
- return;
- }
+ const Type *DstTy = I.getType();
+ const Type *SrcTy = I.getOperand(0)->getType();
Out << '(';
- printType(Out, I.getType());
- Out << ')';
- if (isa<PointerType>(I.getType())&&I.getOperand(0)->getType()->isIntegral() ||
- isa<PointerType>(I.getOperand(0)->getType())&&I.getType()->isIntegral()) {
- // Avoid "cast to pointer from integer of different size" warnings
- Out << "(long)";
+ printCast(I.getOpcode(), SrcTy, DstTy);
+ if (I.getOpcode() == Instruction::SExt && SrcTy == Type::BoolTy) {
+ // Make sure we really get a sext from bool by subtracing the bool from 0
+ Out << "0-";
}
-
writeOperand(I.getOperand(0));
+ if (DstTy == Type::BoolTy &&
+ (I.getOpcode() == Instruction::Trunc ||
+ I.getOpcode() == Instruction::FPToUI ||
+ I.getOpcode() == Instruction::FPToSI ||
+ I.getOpcode() == Instruction::PtrToInt)) {
+ // Make sure we really get a trunc to bool by anding the operand with 1
+ Out << "&1u";
+ }
+ Out << ')';
}
void CWriter::visitSelectInst(SelectInst &I) {
case Intrinsic::setjmp:
case Intrinsic::longjmp:
case Intrinsic::prefetch:
+ case Intrinsic::dbg_stoppoint:
+ case Intrinsic::powi_f32:
+ case Intrinsic::powi_f64:
// We directly implement these intrinsics
break;
default:
+ // If this is an intrinsic that directly corresponds to a GCC
+ // builtin, we handle it.
+ const char *BuiltinName = "";
+#define GET_GCC_BUILTIN_NAME
+#include "llvm/Intrinsics.gen"
+#undef GET_GCC_BUILTIN_NAME
+ // If we handle it, don't lower it.
+ if (BuiltinName[0]) break;
+
// All other intrinsic calls we must lower.
Instruction *Before = 0;
if (CI != &BB->front())
} else {
I = BB->begin();
}
+ break;
}
}
void CWriter::visitCallInst(CallInst &I) {
+ //check if we have inline asm
+ if (isInlineAsm(I)) {
+ visitInlineAsm(I);
+ return;
+ }
+
+ bool WroteCallee = false;
+
// Handle intrinsic function calls first...
if (Function *F = I.getCalledFunction())
if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID()) {
switch (ID) {
- default: assert(0 && "Unknown LLVM intrinsic!");
+ default: {
+ // If this is an intrinsic that directly corresponds to a GCC
+ // builtin, we emit it here.
+ const char *BuiltinName = "";
+#define GET_GCC_BUILTIN_NAME
+#include "llvm/Intrinsics.gen"
+#undef GET_GCC_BUILTIN_NAME
+ assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
+
+ Out << BuiltinName;
+ WroteCallee = true;
+ break;
+ }
case Intrinsic::vastart:
Out << "0; ";
- // Out << "va_start(*(va_list*)&" << Mang->getValueName(&I) << ", ";
Out << "va_start(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ", ";
// Output the last argument to the enclosing function...
if (I.getParent()->getParent()->arg_empty()) {
- std::cerr << "The C backend does not currently support zero "
- << "argument varargs functions, such as '"
- << I.getParent()->getParent()->getName() << "'!\n";
+ cerr << "The C backend does not currently support zero "
+ << "argument varargs functions, such as '"
+ << I.getParent()->getParent()->getName() << "'!\n";
abort();
}
writeOperand(--I.getParent()->getParent()->arg_end());
writeOperand(I.getOperand(1));
Out << ')';
return;
+ case Intrinsic::powi_f32:
+ case Intrinsic::powi_f64:
+ Out << "__builtin_powi(";
+ writeOperand(I.getOperand(1));
+ Out << ", ";
+ writeOperand(I.getOperand(2));
+ Out << ')';
+ return;
case Intrinsic::setjmp:
+#if defined(HAVE__SETJMP) && defined(HAVE__LONGJMP)
+ Out << "_"; // Use _setjmp on systems that support it!
+#endif
Out << "setjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ')';
return;
case Intrinsic::longjmp:
+#if defined(HAVE__SETJMP) && defined(HAVE__LONGJMP)
+ Out << "_"; // Use _longjmp on systems that support it!
+#endif
Out << "longjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(3));
Out << ")";
return;
+ case Intrinsic::dbg_stoppoint: {
+ // If we use writeOperand directly we get a "u" suffix which is rejected
+ // by gcc.
+ DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
+
+ Out << "\n#line "
+ << SPI.getLine()
+ << " \"" << SPI.getDirectory()
+ << SPI.getFileName() << "\"\n";
+ return;
+ }
}
}
Value *Callee = I.getCalledValue();
- // GCC is really a PITA. It does not permit codegening casts of functions to
- // function pointers if they are in a call (it generates a trap instruction
- // instead!). We work around this by inserting a cast to void* in between the
- // function and the function pointer cast. Unfortunately, we can't just form
- // the constant expression here, because the folder will immediately nuke it.
- //
- // Note finally, that this is completely unsafe. ANSI C does not guarantee
- // that void* and function pointers have the same size. :( To deal with this
- // in the common case, we handle casts where the number of arguments passed
- // match exactly.
- //
- bool WroteCallee = false;
+ // If this is a call to a struct-return function, assign to the first
+ // parameter instead of passing it to the call.
+ bool isStructRet = I.getCallingConv() == CallingConv::CSRet;
+ if (isStructRet) {
+ Out << "*(";
+ writeOperand(I.getOperand(1));
+ Out << ") = ";
+ }
+
if (I.isTailCall()) Out << " /*tail*/ ";
- if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
- if (CE->getOpcode() == Instruction::Cast)
- if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
- const FunctionType *RFTy = RF->getFunctionType();
- if (RFTy->getNumParams() == I.getNumOperands()-1) {
- // If the call site expects a value, and the actual callee doesn't
- // provide one, return 0.
- if (I.getType() != Type::VoidTy &&
- RFTy->getReturnType() == Type::VoidTy)
- Out << "0 /*actual callee doesn't return value*/; ";
- Callee = RF;
- } else {
- // Ok, just cast the pointer type.
- Out << "((";
- printType(Out, CE->getType());
- Out << ")(void*)";
- printConstant(RF);
- Out << ')';
- WroteCallee = true;
- }
- }
const PointerType *PTy = cast<PointerType>(Callee->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
- const Type *RetTy = FTy->getReturnType();
+
+ if (!WroteCallee) {
+ // If this is an indirect call to a struct return function, we need to cast
+ // the pointer.
+ bool NeedsCast = isStructRet && !isa<Function>(Callee);
+
+ // GCC is a real PITA. It does not permit codegening casts of functions to
+ // function pointers if they are in a call (it generates a trap instruction
+ // instead!). We work around this by inserting a cast to void* in between
+ // the function and the function pointer cast. Unfortunately, we can't just
+ // form the constant expression here, because the folder will immediately
+ // nuke it.
+ //
+ // Note finally, that this is completely unsafe. ANSI C does not guarantee
+ // that void* and function pointers have the same size. :( To deal with this
+ // in the common case, we handle casts where the number of arguments passed
+ // match exactly.
+ //
+ if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
+ if (CE->isCast())
+ if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
+ NeedsCast = true;
+ Callee = RF;
+ }
+
+ if (NeedsCast) {
+ // Ok, just cast the pointer type.
+ Out << "((";
+ if (!isStructRet)
+ printType(Out, I.getCalledValue()->getType());
+ else
+ printStructReturnPointerFunctionType(Out,
+ cast<PointerType>(I.getCalledValue()->getType()));
+ Out << ")(void*)";
+ }
+ writeOperand(Callee);
+ if (NeedsCast) Out << ')';
+ }
- if (!WroteCallee) writeOperand(Callee);
Out << '(';
unsigned NumDeclaredParams = FTy->getNumParams();
- if (I.getNumOperands() != 1) {
- CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
- if (NumDeclaredParams && (*AI)->getType() != FTy->getParamType(0)) {
+ CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
+ unsigned ArgNo = 0;
+ if (isStructRet) { // Skip struct return argument.
+ ++AI;
+ ++ArgNo;
+ }
+
+ bool PrintedArg = false;
+ for (; AI != AE; ++AI, ++ArgNo) {
+ if (PrintedArg) Out << ", ";
+ if (ArgNo < NumDeclaredParams &&
+ (*AI)->getType() != FTy->getParamType(ArgNo)) {
Out << '(';
- printType(Out, FTy->getParamType(0));
+ printType(Out, FTy->getParamType(ArgNo));
Out << ')';
}
-
writeOperand(*AI);
+ PrintedArg = true;
+ }
+ Out << ')';
+}
- unsigned ArgNo;
- for (ArgNo = 1, ++AI; AI != AE; ++AI, ++ArgNo) {
- Out << ", ";
- if (ArgNo < NumDeclaredParams &&
- (*AI)->getType() != FTy->getParamType(ArgNo)) {
- Out << '(';
- printType(Out, FTy->getParamType(ArgNo));
- Out << ')';
+
+//This converts the llvm constraint string to something gcc is expecting.
+//TODO: work out platform independent constraints and factor those out
+// of the per target tables
+// handle multiple constraint codes
+std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
+
+ assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
+
+ const char** table = 0;
+
+ //Grab the translation table from TargetAsmInfo if it exists
+ if (!TAsm) {
+ std::string E;
+ const TargetMachineRegistry::Entry* Match =
+ TargetMachineRegistry::getClosestStaticTargetForModule(*TheModule, E);
+ if (Match) {
+ //Per platform Target Machines don't exist, so create it
+ // this must be done only once
+ const TargetMachine* TM = Match->CtorFn(*TheModule, "");
+ TAsm = TM->getTargetAsmInfo();
+ }
+ }
+ if (TAsm)
+ table = TAsm->getAsmCBE();
+
+ //Search the translation table if it exists
+ for (int i = 0; table && table[i]; i += 2)
+ if (c.Codes[0] == table[i])
+ return table[i+1];
+
+ //default is identity
+ return c.Codes[0];
+}
+
+//TODO: import logic from AsmPrinter.cpp
+static std::string gccifyAsm(std::string asmstr) {
+ for (std::string::size_type i = 0; i != asmstr.size(); ++i)
+ if (asmstr[i] == '\n')
+ asmstr.replace(i, 1, "\\n");
+ else if (asmstr[i] == '\t')
+ asmstr.replace(i, 1, "\\t");
+ else if (asmstr[i] == '$') {
+ if (asmstr[i + 1] == '{') {
+ std::string::size_type a = asmstr.find_first_of(':', i + 1);
+ std::string::size_type b = asmstr.find_first_of('}', i + 1);
+ std::string n = "%" +
+ asmstr.substr(a + 1, b - a - 1) +
+ asmstr.substr(i + 2, a - i - 2);
+ asmstr.replace(i, b - i + 1, n);
+ i += n.size() - 1;
+ } else
+ asmstr.replace(i, 1, "%");
+ }
+ else if (asmstr[i] == '%')//grr
+ { asmstr.replace(i, 1, "%%"); ++i;}
+
+ return asmstr;
+}
+
+//TODO: assumptions about what consume arguments from the call are likely wrong
+// handle communitivity
+void CWriter::visitInlineAsm(CallInst &CI) {
+ InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
+ std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
+ std::vector<std::pair<std::string, Value*> > Input;
+ std::vector<std::pair<std::string, Value*> > Output;
+ std::string Clobber;
+ int count = CI.getType() == Type::VoidTy ? 1 : 0;
+ for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
+ E = Constraints.end(); I != E; ++I) {
+ assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
+ std::string c =
+ InterpretASMConstraint(*I);
+ switch(I->Type) {
+ default:
+ assert(0 && "Unknown asm constraint");
+ break;
+ case InlineAsm::isInput: {
+ if (c.size()) {
+ Input.push_back(std::make_pair(c, count ? CI.getOperand(count) : &CI));
+ ++count; //consume arg
+ }
+ break;
+ }
+ case InlineAsm::isOutput: {
+ if (c.size()) {
+ Output.push_back(std::make_pair("="+((I->isEarlyClobber ? "&" : "")+c),
+ count ? CI.getOperand(count) : &CI));
+ ++count; //consume arg
}
- writeOperand(*AI);
+ break;
+ }
+ case InlineAsm::isClobber: {
+ if (c.size())
+ Clobber += ",\"" + c + "\"";
+ break;
+ }
}
}
- Out << ')';
+
+ //fix up the asm string for gcc
+ std::string asmstr = gccifyAsm(as->getAsmString());
+
+ Out << "__asm__ volatile (\"" << asmstr << "\"\n";
+ Out << " :";
+ for (std::vector<std::pair<std::string, Value*> >::iterator I = Output.begin(),
+ E = Output.end(); I != E; ++I) {
+ Out << "\"" << I->first << "\"(";
+ writeOperandRaw(I->second);
+ Out << ")";
+ if (I + 1 != E)
+ Out << ",";
+ }
+ Out << "\n :";
+ for (std::vector<std::pair<std::string, Value*> >::iterator I = Input.begin(),
+ E = Input.end(); I != E; ++I) {
+ Out << "\"" << I->first << "\"(";
+ writeOperandRaw(I->second);
+ Out << ")";
+ if (I + 1 != E)
+ Out << ",";
+ }
+ if (Clobber.size())
+ Out << "\n :" << Clobber.substr(1);
+ Out << ")";
}
void CWriter::visitMallocInst(MallocInst &I) {
gep_type_iterator E) {
bool HasImplicitAddress = false;
// If accessing a global value with no indexing, avoid *(&GV) syndrome
- if (GlobalValue *V = dyn_cast<GlobalValue>(Ptr)) {
+ if (isa<GlobalValue>(Ptr)) {
HasImplicitAddress = true;
} else if (isDirectAlloca(Ptr)) {
HasImplicitAddress = true;
// Print out the -> operator if possible...
if (TmpI != E && isa<StructType>(*TmpI)) {
Out << (HasImplicitAddress ? "." : "->");
- Out << "field" << cast<ConstantUInt>(TmpI.getOperand())->getValue();
+ Out << "field" << cast<ConstantInt>(TmpI.getOperand())->getZExtValue();
I = ++TmpI;
}
}
for (; I != E; ++I)
if (isa<StructType>(*I)) {
- Out << ".field" << cast<ConstantUInt>(I.getOperand())->getValue();
+ Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
} else {
Out << '[';
writeOperand(I.getOperand());
// External Interface declaration
//===----------------------------------------------------------------------===//
-bool CTargetMachine::addPassesToEmitFile(PassManager &PM, std::ostream &o,
- CodeGenFileType FileType, bool Fast) {
+bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
+ std::ostream &o,
+ CodeGenFileType FileType,
+ bool Fast) {
if (FileType != TargetMachine::AssemblyFile) return true;
PM.add(createLowerGCPass());
PM.add(createLowerAllocationsPass(true));
PM.add(createLowerInvokePass());
PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
- PM.add(new CBackendNameAllUsedStructs());
- PM.add(new CWriter(o, getIntrinsicLowering()));
+ PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
+ PM.add(new CWriter(o));
return false;
}
projects / oota-llvm.git / blobdiff