//===-- 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/Intrinsics.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/CallSite.h"
#include "llvm/Support/Mangler.h"
#include "Support/StringExtras.h"
#include "Support/STLExtras.h"
+#include "Config/config.h"
#include <algorithm>
#include <sstream>
+namespace llvm {
+
namespace {
class CWriter : public Pass, public InstVisitor<CWriter> {
std::ostream &Out;
Mangler *Mang;
const Module *TheModule;
+ FindUsedTypes *FUT;
+
std::map<const Type *, std::string> TypeNames;
std::set<const Value*> MangledGlobals;
bool needsMalloc, emittedInvoke;
virtual bool run(Module &M) {
// Initialize
TheModule = &M;
+ FUT = &getAnalysis<FindUsedTypes>();
// Ensure that all structure types have names...
bool Changed = nameAllUsedStructureTypes(M);
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);
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 printFunctionSignature(const Function *F, bool Prototype);
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) || isa<VarArgInst>(I))
+ isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<VANextInst>(I))
// Don't inline a load across a store or other bad things!
return false;
if (!AI) return false;
if (AI->isArrayAllocation())
return 0; // FIXME: we can also inline fixed size array allocas!
- if (AI->getParent() != &AI->getParent()->getParent()->getEntryNode())
+ if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
return 0;
return AI;
}
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 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);
};
-}
-
-// 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;
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);
}
}
}
-/// FPCSafeToPrint - 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.) This is adapted from similar code in
-/// lib/VMCore/AsmWriter.cpp:WriteConstantInt().
-static bool FPCSafeToPrint (const ConstantFP *CFP) {
+// 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());
- // Check to make sure that the stringized number is not some string like
- // "Inf" or NaN, that atof will accept, but the lexer will not. Check that
- // the string matches the "[-+]?[0-9]" regex.
+
+ 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 atof(StrVal.c_str()) == CFP->getValue();
return false;
+#endif
}
// printConstant - The LLVM Constant to C Constant converter.
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:
case Instruction::SetLE:
case Instruction::SetGT:
case Instruction::SetGE:
+ case Instruction::Shl:
+ case Instruction::Shr:
Out << "(";
printConstant(CE->getOperand(0));
switch (CE->getOpcode()) {
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));
// 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 {
- if (FPCSafeToPrint (FPC)) {
- Out << ftostr (FPC->getValue ());
- } else {
- Out << FPC->getValue(); // Who knows? Give it our best shot...
- }
+#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;
}
//
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.
// 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";
+ << "#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";
- Out << "#include <stdarg.h>\n";
- Out << "#include <setjmp.h>\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"
if ((I->hasInternalLinkage() || !MangledGlobals.count(I)) &&
!I->getIntrinsicID()) {
printFunctionSignature(I, true);
+ if (I->hasWeakLinkage()) Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
}
}
if (!I->isExternal()) {
Out << "extern ";
printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
-
+
+ if (I->hasLinkOnceLinkage())
+ Out << " __attribute__((common))";
+ else if (I->hasWeakLinkage())
+ Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
}
}
printType(Out, I->getType()->getElementType(), Mang->getValueName(I));
if (I->hasLinkOnceLinkage())
Out << " __attribute__((common))";
- if (!I->getInitializer()->isNullValue()) {
+ 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());
}
}
}
+ // Output all floating point constants that cannot be printed accurately...
+ printFloatingPointConstants(*M);
+
// Output all of the functions...
emittedInvoke = false;
if (!M->empty()) {
<< "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_" + Mangler::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_" + Mangler::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
if (FT->isVarArg() && !FT->getParamTypes().empty()) {
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.
}
FunctionInnards << ")";
// Print out the return type and the entire signature for that matter
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 (const AllocaInst *AI = isDirectAlloca(*I)) {
Out << " ";
+ 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(), Mang->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, unless the printed form preserves
- // precision.
- //
- 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 ((!FPCSafeToPrint(FPC)) // Do not put in FPConstantMap if safe.
- && (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.
//
}
Out << "}\n\n";
- FPConstantMap.clear();
}
// Specific Instruction type classes... note that all of the casts are
// 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) { /* llvm.unwind */\n"
- << " printf(\"throw found with no handler!\\n\"); abort();\n"
+ 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;
}
-static bool isGotoCodeNeccessary(BasicBlock *From, BasicBlock *To) {
+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
Out << "; /* for PHI node */\n";
}
- if (CurBB->getNext() != Succ || isa<InvokeInst>(CurBB->getTerminator())) {
+ 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);
}
|| (I.getType() == Type::FloatTy)) {
needsCast = true;
Out << "((";
- printType(Out, I.getType(), "", false, false);
+ printType(Out, I.getType());
Out << ")(";
}
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:
- case LLVMIntrinsic::sigsetjmp:
- // This instrinsic should never exist in the program, but until we get
+ 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:
- case LLVMIntrinsic::siglongjmp:
+ case Intrinsic::longjmp:
+ case Intrinsic::siglongjmp:
// Longjmp is not implemented, and never will be. It would cause an
// exception throw.
Out << "abort()";
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)) {
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