//===-- Writer.cpp - Library for converting LLVM code to C ----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This library converts LLVM code to C code, compilable by GCC.
//
#include "llvm/Pass.h"
#include "llvm/SymbolTable.h"
#include "llvm/Intrinsics.h"
-#include "llvm/SlotCalculator.h"
#include "llvm/Analysis/FindUsedTypes.h"
#include "llvm/Analysis/ConstantsScanner.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Support/GetElementPtrTypeIterator.h"
#include "llvm/Support/InstVisitor.h"
#include "llvm/Support/InstIterator.h"
+#include "llvm/Support/Mangler.h"
#include "Support/StringExtras.h"
#include "Support/STLExtras.h"
+#include "Config/config.h"
#include <algorithm>
-#include <set>
#include <sstream>
+namespace llvm {
+
namespace {
class CWriter : public Pass, public InstVisitor<CWriter> {
std::ostream &Out;
- SlotCalculator *Table;
+ Mangler *Mang;
const Module *TheModule;
+ FindUsedTypes *FUT;
+
std::map<const Type *, std::string> TypeNames;
std::set<const Value*> MangledGlobals;
- bool needsMalloc;
+ bool needsMalloc, emittedInvoke;
std::map<const ConstantFP *, unsigned> FPConstantMap;
public:
virtual bool run(Module &M) {
// Initialize
- Table = new SlotCalculator(&M, false);
TheModule = &M;
+ FUT = &getAnalysis<FindUsedTypes>();
// Ensure that all structure types have names...
bool Changed = nameAllUsedStructureTypes(M);
+ Mang = new Mangler(M);
// Run...
printModule(&M);
// Free memory...
- delete Table;
+ delete Mang;
TypeNames.clear();
MangledGlobals.clear();
return false;
std::ostream &printType(std::ostream &Out, const Type *Ty,
const std::string &VariableName = "",
- bool IgnoreName = false, bool namedContext = true);
+ bool IgnoreName = false);
void writeOperand(Value *Operand);
void writeOperandInternal(Value *Operand);
- std::string getValueName(const Value *V);
-
private :
bool nameAllUsedStructureTypes(Module &M);
void printModule(Module *M);
+ void printFloatingPointConstants(Module &M);
void printSymbolTable(const SymbolTable &ST);
void printContainedStructs(const Type *Ty, std::set<const StructType *> &);
- void printGlobal(const GlobalVariable *GV);
void printFunctionSignature(const Function *F, bool Prototype);
void printFunction(Function *);
static bool isInlinableInst(const Instruction &I) {
// Must be an expression, must be used exactly once. If it is dead, we
// emit it inline where it would go.
- if (I.getType() == Type::VoidTy || I.use_size() != 1 ||
+ if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
- isa<LoadInst>(I)) // Don't inline a load across a store!
+ isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<VANextInst>(I))
+ // Don't inline a load across a store or other bad things!
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();
}
+ // isDirectAlloca - Define fixed sized allocas in the entry block as direct
+ // variables which are accessed with the & operator. This causes GCC to
+ // generate significantly better code than to emit alloca calls directly.
+ //
+ static const AllocaInst *isDirectAlloca(const Value *V) {
+ const AllocaInst *AI = dyn_cast<AllocaInst>(V);
+ if (!AI) return false;
+ if (AI->isArrayAllocation())
+ return 0; // FIXME: we can also inline fixed size array allocas!
+ if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
+ return 0;
+ return AI;
+ }
+
// Instruction visitation functions
friend class InstVisitor<CWriter>;
void visitReturnInst(ReturnInst &I);
void visitBranchInst(BranchInst &I);
void visitSwitchInst(SwitchInst &I);
+ void visitInvokeInst(InvokeInst &I);
+ void visitUnwindInst(UnwindInst &I);
void visitPHINode(PHINode &I);
void visitBinaryOperator(Instruction &I);
void visitCastInst (CastInst &I);
void visitCallInst (CallInst &I);
+ void visitCallSite (CallSite CS);
void visitShiftInst(ShiftInst &I) { visitBinaryOperator(I); }
void visitMallocInst(MallocInst &I);
void visitLoadInst (LoadInst &I);
void visitStoreInst (StoreInst &I);
void visitGetElementPtrInst(GetElementPtrInst &I);
- void visitVarArgInst(VarArgInst &I);
+ void visitVANextInst(VANextInst &I);
+ void visitVAArgInst (VAArgInst &I);
void visitInstruction(Instruction &I) {
std::cerr << "C Writer does not know about " << I;
}
void outputLValue(Instruction *I) {
- Out << " " << getValueName(I) << " = ";
+ Out << " " << Mang->getValueName(I) << " = ";
}
void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
unsigned Indent);
- void printIndexingExpression(Value *Ptr, User::op_iterator I,
- User::op_iterator E);
+ void printIndexingExpression(Value *Ptr, gep_type_iterator I,
+ gep_type_iterator E);
};
-}
-
-// We dont want identifier names with ., space, - in them.
-// So we replace them with _
-static std::string makeNameProper(std::string x) {
- std::string tmp;
- for (std::string::iterator sI = x.begin(), sEnd = x.end(); sI != sEnd; sI++)
- switch (*sI) {
- case '.': tmp += "d_"; break;
- case ' ': tmp += "s_"; break;
- case '-': tmp += "D_"; break;
- default: tmp += *sI;
- }
-
- return tmp;
-}
-
-std::string CWriter::getValueName(const Value *V) {
- if (V->hasName()) { // Print out the label if it exists...
- if (isa<GlobalValue>(V) && // Do not mangle globals...
- (cast<GlobalValue>(V)->hasExternalLinkage() &&// Unless it's internal or
- !MangledGlobals.count(V))) // Unless the name would collide if we don't
- return makeNameProper(V->getName());
-
- return "l" + utostr(V->getType()->getUniqueID()) + "_" +
- makeNameProper(V->getName());
- }
-
- int Slot = Table->getValSlot(V);
- assert(Slot >= 0 && "Invalid value!");
- return "ltmp_" + itostr(Slot) + "_" + utostr(V->getType()->getUniqueID());
-}
-
-// A pointer type should not use parens around *'s alone, e.g., (**)
-inline bool ptrTypeNameNeedsParens(const std::string &NameSoFar) {
- return (NameSoFar.find_last_not_of('*') != std::string::npos);
-}
// Pass the Type* and the variable name and this prints out the variable
// declaration.
//
std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
const std::string &NameSoFar,
- bool IgnoreName, bool namedContext) {
+ bool IgnoreName) {
if (Ty->isPrimitiveType())
switch (Ty->getPrimitiveID()) {
case Type::VoidTyID: return Out << "void " << NameSoFar;
// Check to see if the type is named.
if (!IgnoreName || isa<OpaqueType>(Ty)) {
std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
- if (I != TypeNames.end()) {
- return Out << I->second << " " << NameSoFar;
- }
+ if (I != TypeNames.end()) return Out << I->second << " " << NameSoFar;
}
switch (Ty->getPrimitiveID()) {
case Type::FunctionTyID: {
const FunctionType *MTy = cast<FunctionType>(Ty);
- std::stringstream FunctionInards;
- FunctionInards << " (" << NameSoFar << ") (";
+ std::stringstream FunctionInnards;
+ FunctionInnards << " (" << NameSoFar << ") (";
for (FunctionType::ParamTypes::const_iterator
I = MTy->getParamTypes().begin(),
E = MTy->getParamTypes().end(); I != E; ++I) {
if (I != MTy->getParamTypes().begin())
- FunctionInards << ", ";
- printType(FunctionInards, *I, "");
+ FunctionInnards << ", ";
+ printType(FunctionInnards, *I, "");
}
if (MTy->isVarArg()) {
if (!MTy->getParamTypes().empty())
- FunctionInards << ", ...";
+ FunctionInnards << ", ...";
} else if (MTy->getParamTypes().empty()) {
- FunctionInards << "void";
+ FunctionInnards << "void";
}
- FunctionInards << ")";
- std::string tstr = FunctionInards.str();
+ FunctionInnards << ")";
+ std::string tstr = FunctionInnards.str();
printType(Out, MTy->getReturnType(), tstr);
return Out;
}
const PointerType *PTy = cast<PointerType>(Ty);
std::string ptrName = "*" + NameSoFar;
- // Do not need parens around "* NameSoFar" if NameSoFar consists only
- // of zero or more '*' chars *and* this is not an unnamed pointer type
- // such as the result type in a cast statement. Otherwise, enclose in ( ).
- if (ptrTypeNameNeedsParens(NameSoFar) || !namedContext ||
- PTy->getElementType()->getPrimitiveID() == Type::ArrayTyID)
- ptrName = "(" + ptrName + ")"; //
+ if (isa<ArrayType>(PTy->getElementType()))
+ ptrName = "(" + ptrName + ")";
return printType(Out, PTy->getElementType(), ptrName);
- }Out <<"--";
+ }
case Type::ArrayTyID: {
const ArrayType *ATy = cast<ArrayType>(Ty);
bool isString = (ETy == Type::SByteTy || ETy == Type::UByteTy);
// Make sure the last character is a null char, as automatically added by C
- if (CPA->getNumOperands() == 0 ||
- !cast<Constant>(*(CPA->op_end()-1))->isNullValue())
+ if (isString && (CPA->getNumOperands() == 0 ||
+ !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
isString = false;
if (isString) {
Out << "\"";
+ // Keep track of whether the last number was a hexadecimal escape
+ bool LastWasHex = false;
+
// 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 = (ETy == Type::SByteTy) ?
- (unsigned char)cast<ConstantSInt>(CPA->getOperand(i))->getValue() :
- (unsigned char)cast<ConstantUInt>(CPA->getOperand(i))->getValue();
+ unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getRawValue();
- if (isprint(C)) {
+ // 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
+ // code, in which case we have to be careful not to print out hex digits
+ // explicitly (the C compiler thinks it is a continuation of the previous
+ // character, sheesh...)
+ //
+ if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
+ LastWasHex = false;
if (C == '"' || C == '\\')
Out << "\\" << C;
else
Out << C;
} else {
+ LastWasHex = false;
switch (C) {
case '\n': Out << "\\n"; break;
case '\t': Out << "\\t"; break;
case '\'': Out << "\\\'"; break;
default:
Out << "\\x";
- Out << ( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A');
- Out << ((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A');
+ Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
+ Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
+ LastWasHex = true;
break;
}
}
}
}
+// 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
+// double, and then checking whether the conversion results in a bit-equal
+// double to the original value of CFP. This depends on us and the target C
+// compiler agreeing on the conversion process (which is pretty likely since we
+// only deal in IEEE FP).
+//
+bool isFPCSafeToPrint(const ConstantFP *CFP) {
+#if HAVE_PRINTF_A
+ char Buffer[100];
+ sprintf(Buffer, "%a", CFP->getValue());
+
+ if (!strncmp(Buffer, "0x", 2) ||
+ !strncmp(Buffer, "-0x", 3) ||
+ !strncmp(Buffer, "+0x", 3))
+ return atof(Buffer) == CFP->getValue();
+ return false;
+#else
+ std::string StrVal = ftostr(CFP->getValue());
+
+ while (StrVal[0] == ' ')
+ StrVal.erase(StrVal.begin());
+
+ // Check to make sure that the stringized number is not some string like "Inf"
+ // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
+ if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
+ ((StrVal[0] == '-' || StrVal[0] == '+') &&
+ (StrVal[1] >= '0' && StrVal[1] <= '9')))
+ // Reparse stringized version!
+ return atof(StrVal.c_str()) == CFP->getValue();
+ return false;
+#endif
+}
// printConstant - The LLVM Constant to C Constant converter.
void CWriter::printConstant(Constant *CPV) {
case Instruction::GetElementPtr:
Out << "(&(";
- printIndexingExpression(CE->getOperand(0),
- CPV->op_begin()+1, CPV->op_end());
+ printIndexingExpression(CE->getOperand(0), gep_type_begin(CPV),
+ gep_type_end(CPV));
Out << "))";
return;
case Instruction::Add:
- Out << "(";
- printConstant(CE->getOperand(0));
- Out << " + ";
- printConstant(CE->getOperand(1));
- Out << ")";
- return;
case Instruction::Sub:
+ case Instruction::Mul:
+ case Instruction::Div:
+ case Instruction::Rem:
+ case Instruction::SetEQ:
+ case Instruction::SetNE:
+ case Instruction::SetLT:
+ case Instruction::SetLE:
+ case Instruction::SetGT:
+ case Instruction::SetGE:
+ case Instruction::Shl:
+ case Instruction::Shr:
Out << "(";
printConstant(CE->getOperand(0));
- Out << " - ";
+ 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::SetEQ: Out << " == "; break;
+ case Instruction::SetNE: Out << " != "; break;
+ case Instruction::SetLT: Out << " < "; break;
+ case Instruction::SetLE: Out << " <= "; break;
+ case Instruction::SetGT: Out << " > "; break;
+ case Instruction::SetGE: Out << " >= "; break;
+ case Instruction::Shl: Out << " << "; break;
+ case Instruction::Shr: Out << " >> "; break;
+ default: assert(0 && "Illegal opcode here!");
+ }
printConstant(CE->getOperand(1));
Out << ")";
return;
// Because of FP precision problems we must load from a stack allocated
// value that holds the value in hex.
Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" : "double")
- << "*)&FloatConstant" << I->second << ")";
+ << "*)&FPConstant" << I->second << ")";
} else {
- Out << FPC->getValue();
+#if HAVE_PRINTF_A
+ // Print out the constant as a floating point number.
+ char Buffer[100];
+ sprintf(Buffer, "%a", FPC->getValue());
+ Out << Buffer << " /*" << FPC->getValue() << "*/ ";
+#else
+ Out << ftostr(FPC->getValue());
+#endif
}
break;
}
case Type::PointerTyID:
if (isa<ConstantPointerNull>(CPV)) {
- Out << "(NULL)";
+ Out << "((";
+ printType(Out, CPV->getType());
+ Out << ")/*NULL*/0)";
break;
} else if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(CPV)) {
writeOperand(CPR->getValue());
void CWriter::writeOperandInternal(Value *Operand) {
if (Instruction *I = dyn_cast<Instruction>(Operand))
- if (isInlinableInst(*I)) {
+ if (isInlinableInst(*I) && !isDirectAlloca(I)) {
// Should we inline this instruction to build a tree?
Out << "(";
visit(*I);
return;
}
- if (Operand->hasName()) {
- Out << getValueName(Operand);
- } else if (Constant *CPV = dyn_cast<Constant>(Operand)) {
+ if (Constant *CPV = dyn_cast<Constant>(Operand)) {
printConstant(CPV);
} else {
- int Slot = Table->getValSlot(Operand);
- assert(Slot >= 0 && "Malformed LLVM!");
- Out << "ltmp_" << Slot << "_" << Operand->getType()->getUniqueID();
+ Out << Mang->getValueName(Operand);
}
}
void CWriter::writeOperand(Value *Operand) {
- if (isa<GlobalVariable>(Operand))
+ if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
Out << "(&"; // Global variables are references as their addresses by llvm
writeOperandInternal(Operand);
- if (isa<GlobalVariable>(Operand))
+ if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
Out << ")";
}
//
bool CWriter::nameAllUsedStructureTypes(Module &M) {
// Get a set of types that are used by the program...
- std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
+ std::set<const Type *> UT = FUT->getTypes();
// Loop over the module symbol table, removing types from UT that are already
// named.
return Changed;
}
-static void generateAllocaDecl(std::ostream& Out) {
- // On SunOS, we need to insert the alloca macro & proto for the builtin.
- Out << "#ifdef sun\n"
+// 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...
+ Out << "/* get a declaration for alloca */\n"
+ << "#ifdef sun\n"
<< "extern void *__builtin_alloca(unsigned long);\n"
<< "#define alloca(x) __builtin_alloca(x)\n"
<< "#else\n"
+ << "#ifndef __FreeBSD__\n"
<< "#include <alloca.h>\n"
+ << "#endif\n"
+ << "#endif\n\n";
+
+ // We output GCC specific attributes to preserve 'linkonce'ness on globals.
+ // If we aren't being compiled with GCC, just drop these attributes.
+ Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\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"
+ << "#elif defined(__GNUC__)\n"
+ << "#define __EXTERNAL_WEAK__ __attribute__((weak))\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 __ATTRIBUTE_WEAK__\n"
+ << "#elif defined(__GNUC__)\n"
+ << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
+ << "#else\n"
+ << "#define __ATTRIBUTE_WEAK__\n"
+ << "#endif\n\n";
+}
+
+// generateProcessorSpecificCode - This is where we add conditional compilation
+// directives to cater to specific processors as need be.
+//
+static void generateProcessorSpecificCode(std::ostream& Out) {
+ // According to ANSI C, longjmp'ing to a setjmp could invalidate any
+ // non-volatile variable in the scope of the setjmp. For now, we are not
+ // doing analysis to determine which variables need to be marked volatile, so
+ // we just mark them all.
+ //
+ // HOWEVER, many targets implement setjmp by saving and restoring the register
+ // file, so they DON'T need variables to be marked volatile, and this is a
+ // HUGE pessimization for them. For this reason, on known-good processors, we
+ // do not emit volatile qualifiers.
+ Out << "#if defined(__386__) || defined(__i386__) || \\\n"
+ << " defined(i386) || defined(WIN32)\n"
+ << "/* setjmp does not require variables to be marked volatile */"
+ << "#define VOLATILE_FOR_SETJMP\n"
+ << "#else\n"
+ << "#define VOLATILE_FOR_SETJMP volatile\n"
<< "#endif\n\n";
}
+
void CWriter::printModule(Module *M) {
// Calculate which global values have names that will collide when we throw
// away type information.
// get declaration for alloca
Out << "/* Provide Declarations */\n";
- generateAllocaDecl(Out);
- Out << "#include <stdarg.h>\n";
- Out << "#include <setjmp.h>\n";
-
- // Provide a definition for null if one does not already exist,
- // and for `bool' if not compiling with a C++ compiler.
- Out << "#ifndef NULL\n#define NULL 0\n#endif\n\n"
+ Out << "#include <stdarg.h>\n"; // Varargs support
+ Out << "#include <setjmp.h>\n"; // Unwind support
+ generateCompilerSpecificCode(Out);
+ generateProcessorSpecificCode(Out);
+
+ // Provide a definition for `bool' if not compiling with a C++ compiler.
+ Out << "\n"
<< "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
<< "\n\n/* Support for floating point constants */\n"
<< "typedef unsigned long long ConstantDoubleTy;\n"
<< "typedef unsigned int ConstantFloatTy;\n"
+ << "\n\n/* Support for the invoke instruction */\n"
+ << "extern struct __llvm_jmpbuf_list_t {\n"
+ << " jmp_buf buf; struct __llvm_jmpbuf_list_t *next;\n"
+ << "} *__llvm_jmpbuf_list;\n"
+
<< "\n\n/* Global Declarations */\n";
// First output all the declarations for the program, because C requires
for (Module::giterator I = M->gbegin(), E = M->gend(); I != E; ++I) {
if (I->hasExternalLinkage()) {
Out << "extern ";
- printType(Out, I->getType()->getElementType(), getValueName(I));
+ printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
Out << ";\n";
}
}
if ((I->hasInternalLinkage() || !MangledGlobals.count(I)) &&
!I->getIntrinsicID()) {
printFunctionSignature(I, true);
+ if (I->hasWeakLinkage()) Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
}
}
}
// Print Malloc prototype if needed
- if (needsMalloc){
+ if (needsMalloc) {
Out << "\n/* Malloc to make sun happy */\n";
- Out << "extern void * malloc(size_t);\n\n";
+ Out << "extern void * malloc();\n\n";
}
- // Output the global variable declerations
+ // Output the global variable declarations
if (!M->gempty()) {
- Out << "\n\n/* Global Variable Declerations */\n";
+ Out << "\n\n/* Global Variable Declarations */\n";
for (Module::giterator I = M->gbegin(), E = M->gend(); I != E; ++I)
if (!I->isExternal()) {
Out << "extern ";
- printType(Out, I->getType()->getElementType(), getValueName(I));
-
+ printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
+
+ if (I->hasLinkOnceLinkage())
+ Out << " __attribute__((common))";
+ else if (I->hasWeakLinkage())
+ Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
}
}
-
// Output the global variable definitions and contents...
if (!M->gempty()) {
Out << "\n\n/* Global Variable Definitions and Initialization */\n";
if (!I->isExternal()) {
if (I->hasInternalLinkage())
Out << "static ";
- printType(Out, I->getType()->getElementType(), getValueName(I));
-
- Out << " = " ;
- writeOperand(I->getInitializer());
+ printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
+ if (I->hasLinkOnceLinkage())
+ Out << " __attribute__((common))";
+ else if (I->hasWeakLinkage())
+ Out << " __ATTRIBUTE_WEAK__";
+
+ // If the initializer is not null, emit the initializer. If it is null,
+ // we try to avoid emitting large amounts of zeros. The problem with
+ // this, however, occurs when the variable has weak linkage. In this
+ // case, the assembler will complain about the variable being both weak
+ // and common, so we disable this optimization.
+ if (!I->getInitializer()->isNullValue() ||
+ I->hasWeakLinkage()) {
+ Out << " = " ;
+ writeOperand(I->getInitializer());
+ }
Out << ";\n";
}
}
+ // Output all floating point constants that cannot be printed accurately...
+ printFloatingPointConstants(*M);
+
// Output all of the functions...
+ emittedInvoke = false;
if (!M->empty()) {
Out << "\n\n/* Function Bodies */\n";
for (Module::iterator I = M->begin(), E = M->end(); I != E; ++I)
printFunction(I);
}
+
+ // If the program included an invoke instruction, we need to output the
+ // support code for it here!
+ if (emittedInvoke) {
+ Out << "\n/* More support for the invoke instruction */\n"
+ << "struct __llvm_jmpbuf_list_t *__llvm_jmpbuf_list "
+ << "__attribute__((common)) = 0;\n";
+ }
+
+ // Done with global FP constants
+ FPConstantMap.clear();
}
+/// Output all floating point constants that cannot be printed accurately...
+void CWriter::printFloatingPointConstants(Module &M) {
+ union {
+ double D;
+ unsigned long long U;
+ } DBLUnion;
+
+ union {
+ float F;
+ unsigned U;
+ } FLTUnion;
+
+ // Scan the module for floating point constants. If any FP constant is used
+ // in the function, we want to redirect it here so that we do not depend on
+ // the precision of the printed form, unless the printed form preserves
+ // precision.
+ //
+ unsigned FPCounter = 0;
+ for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F)
+ for (constant_iterator I = constant_begin(F), E = constant_end(F);
+ I != E; ++I)
+ if (const ConstantFP *FPC = dyn_cast<ConstantFP>(*I))
+ if (!isFPCSafeToPrint(FPC) && // Do not put in FPConstantMap if safe.
+ !FPConstantMap.count(FPC)) {
+ double Val = FPC->getValue();
+
+ FPConstantMap[FPC] = FPCounter; // Number the FP constants
+
+ if (FPC->getType() == Type::DoubleTy) {
+ DBLUnion.D = Val;
+ Out << "const ConstantDoubleTy FPConstant" << FPCounter++
+ << " = 0x" << std::hex << DBLUnion.U << std::dec
+ << "ULL; /* " << Val << " */\n";
+ } else if (FPC->getType() == Type::FloatTy) {
+ FLTUnion.F = Val;
+ Out << "const ConstantFloatTy FPConstant" << FPCounter++
+ << " = 0x" << std::hex << FLTUnion.U << std::dec
+ << "U; /* " << Val << " */\n";
+ } else
+ assert(0 && "Unknown float type!");
+ }
+
+ Out << "\n";
+ }
+
/// printSymbolTable - Run through symbol table looking for type names. If a
/// type name is found, emit it's declaration...
// Print out forward declarations for structure types before anything else!
Out << "/* Structure forward decls */\n";
for (; I != End; ++I)
- if (const Type *STy = dyn_cast<StructType>(I->second)) {
- std::string Name = "struct l_" + makeNameProper(I->first);
- Out << Name << ";\n";
- TypeNames.insert(std::make_pair(STy, Name));
- }
+ if (const Type *STy = dyn_cast<StructType>(I->second))
+ // Only print out used types!
+ if (FUT->getTypes().count(STy)) {
+ std::string Name = "struct l_" + Mangler::makeNameProper(I->first);
+ Out << Name << ";\n";
+ TypeNames.insert(std::make_pair(STy, Name));
+ }
Out << "\n";
// Now we can print out typedefs...
Out << "/* Typedefs */\n";
- for (I = ST.type_begin(Type::TypeTy); I != End; ++I) {
- const Type *Ty = cast<Type>(I->second);
- std::string Name = "l_" + makeNameProper(I->first);
- Out << "typedef ";
- printType(Out, Ty, Name);
- Out << ";\n";
- }
-
+ for (I = ST.type_begin(Type::TypeTy); I != End; ++I)
+ // Only print out used types!
+ if (FUT->getTypes().count(cast<Type>(I->second))) {
+ const Type *Ty = cast<Type>(I->second);
+ std::string Name = "l_" + Mangler::makeNameProper(I->first);
+ Out << "typedef ";
+ printType(Out, Ty, Name);
+ Out << ";\n";
+ }
+
Out << "\n";
// Keep track of which structures have been printed so far...
Out << "/* Structure contents */\n";
for (I = ST.type_begin(Type::TypeTy); I != End; ++I)
if (const StructType *STy = dyn_cast<StructType>(I->second))
- printContainedStructs(STy, StructPrinted);
+ // Only print out used types!
+ if (FUT->getTypes().count(STy))
+ printContainedStructs(STy, StructPrinted);
}
// Push the struct onto the stack and recursively push all structs
// this one depends on.
void CWriter::printContainedStructs(const Type *Ty,
std::set<const StructType*> &StructPrinted){
- if (const StructType *STy = dyn_cast<StructType>(Ty)){
+ 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...
void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
- // If the program provides it's own malloc prototype we don't need
+ // If the program provides its own malloc prototype we don't need
// to include the general one.
- if (getValueName(F) == "malloc")
+ if (Mang->getValueName(F) == "malloc")
needsMalloc = false;
- if (F->hasInternalLinkage()) Out << "static ";
+
+ if (F->hasInternalLinkage()) Out << "static ";
+ if (F->hasLinkOnceLinkage()) Out << "inline ";
+
// Loop over the arguments, printing them...
const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
- std::stringstream FunctionInards;
+ std::stringstream FunctionInnards;
// Print out the name...
- FunctionInards << getValueName(F) << "(";
+ FunctionInnards << Mang->getValueName(F) << "(";
if (!F->isExternal()) {
if (!F->aempty()) {
std::string ArgName;
if (F->abegin()->hasName() || !Prototype)
- ArgName = getValueName(F->abegin());
- printType(FunctionInards, F->afront().getType(), ArgName);
+ ArgName = Mang->getValueName(F->abegin());
+ printType(FunctionInnards, F->afront().getType(), ArgName);
for (Function::const_aiterator I = ++F->abegin(), E = F->aend();
I != E; ++I) {
- FunctionInards << ", ";
+ FunctionInnards << ", ";
if (I->hasName() || !Prototype)
- ArgName = getValueName(I);
+ ArgName = Mang->getValueName(I);
else
ArgName = "";
- printType(FunctionInards, I->getType(), ArgName);
+ printType(FunctionInnards, I->getType(), ArgName);
}
}
} else {
for (FunctionType::ParamTypes::const_iterator I =
FT->getParamTypes().begin(),
E = FT->getParamTypes().end(); I != E; ++I) {
- if (I != FT->getParamTypes().begin()) FunctionInards << ", ";
- printType(FunctionInards, *I);
+ if (I != FT->getParamTypes().begin()) FunctionInnards << ", ";
+ printType(FunctionInnards, *I);
}
}
// unless there are no known types, in which case, we just emit ().
//
if (FT->isVarArg() && !FT->getParamTypes().empty()) {
- if (FT->getParamTypes().size()) FunctionInards << ", ";
- FunctionInards << "..."; // Output varargs portion of signature!
+ if (FT->getParamTypes().size()) FunctionInnards << ", ";
+ FunctionInnards << "..."; // Output varargs portion of signature!
+ } else if (!FT->isVarArg() && FT->getParamTypes().empty()) {
+ FunctionInnards << "void"; // ret() -> ret(void) in C.
}
- FunctionInards << ")";
+ FunctionInnards << ")";
// Print out the return type and the entire signature for that matter
- printType(Out, F->getReturnType(), FunctionInards.str());
-
+ printType(Out, F->getReturnType(), FunctionInnards.str());
}
-
void CWriter::printFunction(Function *F) {
if (F->isExternal()) return;
- Table->incorporateFunction(F);
-
printFunctionSignature(F, false);
Out << " {\n";
+ // Determine whether or not the function contains any invoke instructions.
+ bool HasInvoke = false;
+ for (Function::iterator I = F->begin(), E = F->end(); I != E; ++I)
+ if (isa<InvokeInst>(I->getTerminator())) {
+ HasInvoke = true;
+ break;
+ }
+
// print local variable information for the function
for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
- if ((*I)->getType() != Type::VoidTy && !isInlinableInst(**I)) {
+ if (const AllocaInst *AI = isDirectAlloca(*I)) {
Out << " ";
- printType(Out, (*I)->getType(), getValueName(*I));
+ if (HasInvoke) Out << "VOLATILE_FOR_SETJMP ";
+ printType(Out, AI->getAllocatedType(), Mang->getValueName(AI));
+ Out << "; /* Address exposed local */\n";
+ } else if ((*I)->getType() != Type::VoidTy && !isInlinableInst(**I)) {
+ Out << " ";
+ if (HasInvoke) Out << "VOLATILE_FOR_SETJMP ";
+ printType(Out, (*I)->getType(), Mang->getValueName(*I));
Out << ";\n";
-
+
if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
Out << " ";
- printType(Out, (*I)->getType(), getValueName(*I)+"__PHI_TEMPORARY");
+ if (HasInvoke) Out << "VOLATILE_FOR_SETJMP ";
+ printType(Out, (*I)->getType(),
+ Mang->getValueName(*I)+"__PHI_TEMPORARY");
Out << ";\n";
}
}
Out << "\n";
- // Scan the function for floating point constants. If any FP constant is used
- // in the function, we want to redirect it here so that we do not depend on
- // the precision of the printed form.
- //
- unsigned FPCounter = 0;
- for (constant_iterator I = constant_begin(F), E = constant_end(F); I != E;++I)
- if (const ConstantFP *FPC = dyn_cast<ConstantFP>(*I))
- if (FPConstantMap.find(FPC) == FPConstantMap.end()) {
- double Val = FPC->getValue();
-
- FPConstantMap[FPC] = FPCounter; // Number the FP constants
-
- if (FPC->getType() == Type::DoubleTy)
- Out << " const ConstantDoubleTy FloatConstant" << FPCounter++
- << " = 0x" << std::hex << *(unsigned long long*)&Val << std::dec
- << "; /* " << Val << " */\n";
- else if (FPC->getType() == Type::FloatTy) {
- float fVal = Val;
- Out << " const ConstantFloatTy FloatConstant" << FPCounter++
- << " = 0x" << std::hex << *(unsigned*)&fVal << std::dec
- << "; /* " << Val << " */\n";
- } else
- assert(0 && "Unknown float type!");
- }
-
- Out << "\n";
-
// print the basic blocks
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
BasicBlock *Prev = BB->getPrev();
// Don't print the label for the basic block if there are no uses, or if the
- // only terminator use is the precessor basic block's terminator. We have
+ // only terminator use is the predecessor basic block's terminator. We have
// to scan the use list because PHI nodes use basic blocks too but do not
// require a label to be generated.
//
UI != UE; ++UI)
if (TerminatorInst *TI = dyn_cast<TerminatorInst>(*UI))
if (TI != Prev->getTerminator() ||
- isa<SwitchInst>(Prev->getTerminator())) {
+ isa<SwitchInst>(Prev->getTerminator()) ||
+ isa<InvokeInst>(Prev->getTerminator())) {
NeedsLabel = true;
break;
}
- if (NeedsLabel) Out << getValueName(BB) << ":\n";
+ if (NeedsLabel) Out << Mang->getValueName(BB) << ":\n";
// Output all of the instructions in the basic block...
for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E; ++II){
- if (!isInlinableInst(*II)) {
+ if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
if (II->getType() != Type::VoidTy)
outputLValue(II);
else
}
Out << "}\n\n";
- Table->purgeFunction();
- FPConstantMap.clear();
}
// Specific Instruction type classes... note that all of the casts are
-// neccesary because we use the instruction classes as opaque types...
+// necessary because we use the instruction classes as opaque types...
//
void CWriter::visitReturnInst(ReturnInst &I) {
// Don't output a void return if this is the last basic block in the function
Out << " }\n";
}
+void CWriter::visitInvokeInst(InvokeInst &II) {
+ Out << " {\n"
+ << " struct __llvm_jmpbuf_list_t Entry;\n"
+ << " Entry.next = __llvm_jmpbuf_list;\n"
+ << " if (setjmp(Entry.buf)) {\n"
+ << " __llvm_jmpbuf_list = Entry.next;\n";
+ printBranchToBlock(II.getParent(), II.getExceptionalDest(), 4);
+ Out << " }\n"
+ << " __llvm_jmpbuf_list = &Entry;\n"
+ << " ";
+
+ if (II.getType() != Type::VoidTy) outputLValue(&II);
+ visitCallSite(&II);
+ Out << ";\n"
+ << " __llvm_jmpbuf_list = Entry.next;\n"
+ << " }\n";
+ printBranchToBlock(II.getParent(), II.getNormalDest(), 0);
+ emittedInvoke = true;
+}
-static bool isGotoCodeNeccessary(BasicBlock *From, BasicBlock *To) {
+
+void CWriter::visitUnwindInst(UnwindInst &I) {
+ // The unwind instructions causes a control flow transfer out of the current
+ // function, unwinding the stack until a caller who used the invoke
+ // instruction is found. In this context, we code generated the invoke
+ // instruction to add an entry to the top of the jmpbuf_list. Thus, here we
+ // just have to longjmp to the specified handler.
+ Out << " if (__llvm_jmpbuf_list == 0) { /* unwind */\n"
+ << "#ifdef _LP64\n"
+ << " extern signed long long write();\n"
+ << "#else\n"
+ << " extern write();\n"
+ << "#endif\n"
+ << " ((void (*)(int, void*, unsigned))write)(2,\n"
+ << " \"throw found with no handler!\\n\", 31); abort();\n"
+ << " }\n"
+ << " longjmp(__llvm_jmpbuf_list->buf, 1);\n";
+ emittedInvoke = true;
+}
+
+bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
// If PHI nodes need copies, we need the copy code...
if (isa<PHINode>(To->front()) ||
From->getNext() != To) // Not directly successor, need goto
}
void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
- unsigned Indent) {
+ unsigned Indent) {
for (BasicBlock::iterator I = Succ->begin();
PHINode *PN = dyn_cast<PHINode>(I); ++I) {
// now we have to do the printing
Out << std::string(Indent, ' ');
- Out << " " << getValueName(I) << "__PHI_TEMPORARY = ";
+ Out << " " << Mang->getValueName(I) << "__PHI_TEMPORARY = ";
writeOperand(PN->getIncomingValue(PN->getBasicBlockIndex(CurBB)));
Out << "; /* for PHI node */\n";
}
- if (CurBB->getNext() != Succ) {
+ if (CurBB->getNext() != Succ ||
+ isa<InvokeInst>(CurBB->getTerminator()) ||
+ isa<SwitchInst>(CurBB->getTerminator())) {
Out << std::string(Indent, ' ') << " goto ";
writeOperand(Succ);
Out << ";\n";
}
}
-// Brach instruction printing - Avoid printing out a brach to a basic block that
-// immediately succeeds the current one.
+// Branch instruction printing - Avoid printing out a branch to a basic block
+// that immediately succeeds the current one.
//
void CWriter::visitBranchInst(BranchInst &I) {
if (I.isConditional()) {
- if (isGotoCodeNeccessary(I.getParent(), I.getSuccessor(0))) {
+ if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
Out << " if (";
writeOperand(I.getCondition());
Out << ") {\n";
printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
- if (isGotoCodeNeccessary(I.getParent(), I.getSuccessor(1))) {
+ if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
Out << " } else {\n";
printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
}
} else {
- // First goto not neccesary, assume second one is...
+ // First goto not necessary, assume second one is...
Out << " if (!";
writeOperand(I.getCondition());
Out << ") {\n";
void CWriter::visitBinaryOperator(Instruction &I) {
// binary instructions, shift instructions, setCond instructions.
assert(!isa<PointerType>(I.getType()));
+
+ // We must cast the results of binary operations which might be promoted.
+ bool needsCast = false;
+ if ((I.getType() == Type::UByteTy) || (I.getType() == Type::SByteTy)
+ || (I.getType() == Type::UShortTy) || (I.getType() == Type::ShortTy)
+ || (I.getType() == Type::FloatTy)) {
+ needsCast = true;
+ Out << "((";
+ printType(Out, I.getType());
+ Out << ")(";
+ }
writeOperand(I.getOperand(0));
}
writeOperand(I.getOperand(1));
+
+ if (needsCast) {
+ Out << "))";
+ }
}
void CWriter::visitCastInst(CastInst &I) {
return;
}
Out << "(";
- printType(Out, I.getType(), "", /*ignoreName*/false, /*namedContext*/false);
+ printType(Out, I.getType());
Out << ")";
if (isa<PointerType>(I.getType())&&I.getOperand(0)->getType()->isIntegral() ||
isa<PointerType>(I.getOperand(0)->getType())&&I.getType()->isIntegral()) {
void CWriter::visitCallInst(CallInst &I) {
// Handle intrinsic function calls first...
if (Function *F = I.getCalledFunction())
- if (LLVMIntrinsic::ID ID = (LLVMIntrinsic::ID)F->getIntrinsicID()) {
+ if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID()) {
switch (ID) {
default: assert(0 && "Unknown LLVM intrinsic!");
- case LLVMIntrinsic::va_start:
- Out << "va_start((va_list)*";
- writeOperand(I.getOperand(1));
- Out << ", ";
+ case Intrinsic::va_start:
+ Out << "0; ";
+
+ Out << "va_start(*(va_list*)&" << Mang->getValueName(&I) << ", ";
// Output the last argument to the enclosing function...
+ if (I.getParent()->getParent()->aempty()) {
+ std::cerr << "The C backend does not currently support zero "
+ << "argument varargs functions, such as '"
+ << I.getParent()->getParent()->getName() << "'!\n";
+ abort();
+ }
writeOperand(&I.getParent()->getParent()->aback());
Out << ")";
return;
- case LLVMIntrinsic::va_end:
- Out << "va_end((va_list)*";
+ case Intrinsic::va_end:
+ Out << "va_end(*(va_list*)&";
writeOperand(I.getOperand(1));
Out << ")";
return;
- case LLVMIntrinsic::va_copy:
- Out << "va_copy((va_list)*";
+ case Intrinsic::va_copy:
+ Out << "0;";
+ Out << "va_copy(*(va_list*)&" << Mang->getValueName(&I) << ", ";
+ Out << "*(va_list*)&";
writeOperand(I.getOperand(1));
- Out << ", (va_list)";
- writeOperand(I.getOperand(2));
Out << ")";
return;
-
- case LLVMIntrinsic::setjmp:
- Out << "setjmp((jmp_buf)";
- writeOperand(I.getOperand(1));
- Out << ")";
+ case Intrinsic::setjmp:
+ case Intrinsic::sigsetjmp:
+ // This intrinsic should never exist in the program, but until we get
+ // setjmp/longjmp transformations going on, we should codegen it to
+ // something reasonable. This will allow code that never calls longjmp
+ // to work.
+ Out << "0";
return;
- case LLVMIntrinsic::longjmp:
- Out << "longjmp((jmp_buf)";
- writeOperand(I.getOperand(1));
- Out << ", ";
- writeOperand(I.getOperand(2));
- Out << ")";
+ case Intrinsic::longjmp:
+ case Intrinsic::siglongjmp:
+ // Longjmp is not implemented, and never will be. It would cause an
+ // exception throw.
+ Out << "abort()";
return;
}
}
+ visitCallSite(&I);
+}
- const PointerType *PTy = cast<PointerType>(I.getCalledValue()->getType());
+void CWriter::visitCallSite(CallSite CS) {
+ const PointerType *PTy = cast<PointerType>(CS.getCalledValue()->getType());
const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
const Type *RetTy = FTy->getReturnType();
- writeOperand(I.getOperand(0));
+ writeOperand(CS.getCalledValue());
Out << "(";
- if (I.getNumOperands() > 1) {
- writeOperand(I.getOperand(1));
+ if (CS.arg_begin() != CS.arg_end()) {
+ CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end();
+ writeOperand(*AI);
- for (unsigned op = 2, Eop = I.getNumOperands(); op != Eop; ++op) {
+ for (++AI; AI != AE; ++AI) {
Out << ", ";
- writeOperand(I.getOperand(op));
+ writeOperand(*AI);
}
}
Out << ")";
}
void CWriter::visitFreeInst(FreeInst &I) {
- Out << "free(";
+ Out << "free((char*)";
writeOperand(I.getOperand(0));
Out << ")";
}
-void CWriter::printIndexingExpression(Value *Ptr, User::op_iterator I,
- User::op_iterator E) {
+void CWriter::printIndexingExpression(Value *Ptr, gep_type_iterator 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)) {
} else if (ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(Ptr)) {
HasImplicitAddress = true;
Ptr = CPR->getValue(); // Get to the global...
+ } else if (isDirectAlloca(Ptr)) {
+ HasImplicitAddress = true;
}
if (I == E) {
return;
}
- const Constant *CI = dyn_cast<Constant>(I);
+ const Constant *CI = dyn_cast<Constant>(I.getOperand());
if (HasImplicitAddress && (!CI || !CI->isNullValue()))
Out << "(&";
if (HasImplicitAddress) {
++I;
- } else if (CI && CI->isNullValue() && I+1 != E) {
+ } else if (CI && CI->isNullValue()) {
+ gep_type_iterator TmpI = I; ++TmpI;
+
// Print out the -> operator if possible...
- if ((*(I+1))->getType() == Type::UByteTy) {
+ if (TmpI != E && isa<StructType>(*TmpI)) {
Out << (HasImplicitAddress ? "." : "->");
- Out << "field" << cast<ConstantUInt>(*(I+1))->getValue();
- I += 2;
- }
+ Out << "field" << cast<ConstantUInt>(TmpI.getOperand())->getValue();
+ I = ++TmpI;
+ }
}
for (; I != E; ++I)
- if ((*I)->getType() == Type::LongTy) {
+ if (isa<StructType>(*I)) {
+ Out << ".field" << cast<ConstantUInt>(I.getOperand())->getValue();
+ } else {
Out << "[";
- writeOperand(*I);
+ writeOperand(I.getOperand());
Out << "]";
- } else {
- Out << ".field" << cast<ConstantUInt>(*I)->getValue();
}
}
void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
Out << "&";
- printIndexingExpression(I.getPointerOperand(), I.idx_begin(), I.idx_end());
+ printIndexingExpression(I.getPointerOperand(), gep_type_begin(I),
+ gep_type_end(I));
}
-void CWriter::visitVarArgInst(VarArgInst &I) {
- Out << "va_arg((va_list)*";
- writeOperand(I.getOperand(0));
- Out << ", ";
- printType(Out, I.getType(), "", /*ignoreName*/false, /*namedContext*/false);
+void CWriter::visitVANextInst(VANextInst &I) {
+ Out << Mang->getValueName(I.getOperand(0));
+ Out << "; va_arg(*(va_list*)&" << Mang->getValueName(&I) << ", ";
+ printType(Out, I.getArgType());
Out << ")";
}
+void CWriter::visitVAArgInst(VAArgInst &I) {
+ Out << "0;\n";
+ Out << "{ va_list Tmp; va_copy(Tmp, *(va_list*)&";
+ writeOperand(I.getOperand(0));
+ Out << ");\n " << Mang->getValueName(&I) << " = va_arg(Tmp, ";
+ printType(Out, I.getType());
+ Out << ");\n va_end(Tmp); }";
+}
+
+}
//===----------------------------------------------------------------------===//
// External Interface declaration
//===----------------------------------------------------------------------===//
Pass *createWriteToCPass(std::ostream &o) { return new CWriter(o); }
+
+} // End llvm namespace
projects / oota-llvm.git / blobdiff