#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"
}
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);
};
// Pass the Type* and the variable name and this prints out the variable
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));
// generateCompilerSpecificCode - This is where we add conditional compilation
// directives to cater to specific compilers as need be.
//
-void generateCompilerSpecificCode(std::ostream& Out) {
+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"
// 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))";
+ if (I->hasWeakLinkage()) Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
}
}
if (I->hasLinkOnceLinkage())
Out << " __attribute__((common))";
else if (I->hasWeakLinkage())
- Out << " __attribute__((weak))";
+ Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
}
}
if (I->hasLinkOnceLinkage())
Out << " __attribute__((common))";
else if (I->hasWeakLinkage())
- Out << " __attribute__((weak))";
+ 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
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 << " ";
+ if (HasInvoke) Out << "VOLATILE_FOR_SETJMP ";
printType(Out, (*I)->getType(),
Mang->getValueName(*I)+"__PHI_TEMPORARY");
Out << ";\n";
// 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"
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::visitVANextInst(VANextInst &I) {
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