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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/Target/TargetData.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
X86COFFMachineModuleInfo::X86COFFMachineModuleInfo(const MachineModuleInfo &) {
}
X86COFFMachineModuleInfo::~X86COFFMachineModuleInfo() {
}
void X86COFFMachineModuleInfo::AddFunctionInfo(const Function *F,
const X86MachineFunctionInfo &Val) {
FunctionInfoMap[F] = Val;
}
static X86MachineFunctionInfo calculateFunctionInfo(const Function *F,
const TargetData &TD) {
X86MachineFunctionInfo Info;
uint64_t Size = 0;
switch (F->getCallingConv()) {
case CallingConv::X86_StdCall:
Info.setDecorationStyle(StdCall);
break;
case CallingConv::X86_FastCall:
Info.setDecorationStyle(FastCall);
break;
default:
return Info;
}
unsigned argNum = 1;
for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
AI != AE; ++AI, ++argNum) {
const Type* Ty = AI->getType();
// 'Dereference' type in case of byval parameter attribute
if (F->paramHasAttr(argNum, Attribute::ByVal))
Ty = cast<PointerType>(Ty)->getElementType();
// Size should be aligned to DWORD boundary
Size += ((TD.getTypeAllocSize(Ty) + 3)/4)*4;
}
// We're not supporting tooooo huge arguments :)
Info.setBytesToPopOnReturn((unsigned int)Size);
return Info;
}
/// DecorateCygMingName - Query FunctionInfoMap and use this information for
/// various name decorations for Cygwin and MingW.
void X86COFFMachineModuleInfo::DecorateCygMingName(SmallVectorImpl<char> &Name,
const GlobalValue *GV,
const TargetData &TD) {
const Function *F = dyn_cast<Function>(GV);
if (!F) return;
// Save function name for later type emission.
if (F->isDeclaration())
CygMingStubs.insert(StringRef(Name.data(), Name.size()));
// 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;
const X86MachineFunctionInfo *Info;
FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
if (info_item == FunctionInfoMap.end()) {
// Calculate apropriate function info and populate map
FunctionInfoMap[F] = calculateFunctionInfo(F, TD);
Info = &FunctionInfoMap[F];
} else {
Info = &info_item->second;
}
if (Info->getDecorationStyle() == None) return;
const FunctionType *FT = F->getFunctionType();
// "Pure" variadic functions do not receive @0 suffix.
if (!FT->isVarArg() || FT->getNumParams() == 0 ||
(FT->getNumParams() == 1 && F->hasStructRetAttr()))
raw_svector_ostream(Name) << '@' << Info->getBytesToPopOnReturn();
if (Info->getDecorationStyle() == FastCall) {
if (Name[0] == '_')
Name[0] = '@';
else
Name.insert(Name.begin(), '@');
}
}
/// DecorateCygMingName - Query FunctionInfoMap and use this information for
/// various name decorations for Cygwin and MingW.
void X86COFFMachineModuleInfo::DecorateCygMingName(std::string &Name,
const GlobalValue *GV,
const TargetData &TD) {
SmallString<128> NameStr(Name.begin(), Name.end());
DecorateCygMingName(NameStr, GV, TD);
Name.assign(NameStr.begin(), NameStr.end());
}
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