split random COFF asmprinter state out to X86COFFMachineModuleInfo.h.

Make dllexport directives come out in determinstic order.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82381 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86COFFMachineModuleInfo.cpp

@@ -0,0 +1,123 @@
+//===-- 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());
+}