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//===-- llvm/CodeGen/X86COFFMachineModuleInfo.cpp -------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This is an MMI implementation for X86 COFF (windows) targets.
//
//===----------------------------------------------------------------------===//
#include "X86COFFMachineModuleInfo.h"
#include "X86MachineFunctionInfo.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetData.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
X86COFFMachineModuleInfo::~X86COFFMachineModuleInfo() {
}
/// DecorateCygMingName - Query FunctionInfoMap and use this information for
/// various name decorations for Cygwin and MingW.
MCSymbol *X86COFFMachineModuleInfo::DecorateCygMingName(MCSymbol *NameSym,
MCContext &Ctx,
const Function *F,
const TargetData &TD) {
// We don't want to decorate non-stdcall or non-fastcall functions right now
CallingConv::ID CC = F->getCallingConv();
if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
return NameSym;
unsigned ArgWords = 0;
// Calculate arguments sizes
for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
AI != AE; ++AI) {
const Type *Ty = AI->getType();
// 'Dereference' type in case of byval parameter attribute
if (AI->hasByValAttr())
Ty = cast<PointerType>(Ty)->getElementType();
// Size should be aligned to DWORD boundary
ArgWords += ((TD.getTypeAllocSize(Ty) + 3)/4)*4;
}
const FunctionType *FT = F->getFunctionType();
SmallString<128> Name(NameSym->getName().begin(), NameSym->getName().end());
// "Pure" variadic functions do not receive @0 suffix.
if (!FT->isVarArg() || FT->getNumParams() == 0 ||
(FT->getNumParams() == 1 && F->hasStructRetAttr()))
raw_svector_ostream(Name) << '@' << ArgWords;
if (CC == CallingConv::X86_FastCall) {
if (Name[0] == '_')
Name[0] = '@';
else
Name.insert(Name.begin(), '@');
}
return Ctx.GetOrCreateSymbol(Name.str());
}
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