#include "X86AsmPrinter.h"
#include "X86ATTAsmPrinter.h"
+#include "X86COFF.h"
#include "X86IntelAsmPrinter.h"
+#include "X86MachineFunctionInfo.h"
#include "X86Subtarget.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/TargetAsmInfo.h"
+#include "llvm/Target/TargetOptions.h"
using namespace llvm;
-Statistic<> llvm::EmittedInsts("asm-printer",
- "Number of machine instrs printed");
+static X86FunctionInfo calculateFunctionInfo(const Function *F,
+ const TargetData *TD) {
+ X86FunctionInfo 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;
+ }
+
+ for (Function::const_arg_iterator AI = F->arg_begin(), AE = F->arg_end();
+ AI != AE; ++AI)
+ Size += TD->getTypeSize(AI->getType());
+
+ // Size should be aligned to DWORD boundary
+ Size = ((Size + 3)/4)*4;
+
+ // We're not supporting tooooo huge arguments :)
+ Info.setBytesToPopOnReturn((unsigned int)Size);
+ return Info;
+}
+
+
+/// decorateName - Query FunctionInfoMap and use this information for various
+/// name decoration.
+void X86SharedAsmPrinter::decorateName(std::string &Name,
+ const GlobalValue *GV) {
+ const Function *F = dyn_cast<Function>(GV);
+ if (!F) return;
+
+ // We don't want to decorate non-stdcall or non-fastcall functions right now
+ unsigned CC = F->getCallingConv();
+ if (CC != CallingConv::X86_StdCall && CC != CallingConv::X86_FastCall)
+ return;
+
+ FMFInfoMap::const_iterator info_item = FunctionInfoMap.find(F);
+
+ const X86FunctionInfo *Info;
+ if (info_item == FunctionInfoMap.end()) {
+ // Calculate apropriate function info and populate map
+ FunctionInfoMap[F] = calculateFunctionInfo(F, TM.getTargetData());
+ Info = &FunctionInfoMap[F];
+ } else {
+ Info = &info_item->second;
+ }
+
+ switch (Info->getDecorationStyle()) {
+ case None:
+ break;
+ case StdCall:
+ if (!F->isVarArg()) // Variadic functions do not receive @0 suffix.
+ Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+ break;
+ case FastCall:
+ if (!F->isVarArg()) // Variadic functions do not receive @0 suffix.
+ Name += '@' + utostr_32(Info->getBytesToPopOnReturn());
+
+ if (Name[0] == '_') {
+ Name[0] = '@';
+ } else {
+ Name = '@' + Name;
+ }
+ break;
+ default:
+ assert(0 && "Unsupported DecorationStyle");
+ }
+}
/// doInitialization
bool X86SharedAsmPrinter::doInitialization(Module &M) {
- if (Subtarget->isTargetDarwin()) {
- const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
- if (!Subtarget->is64Bit())
- X86PICStyle = PICStyle::Stub;
-
+ if (Subtarget->isTargetELF() ||
+ Subtarget->isTargetCygMing() ||
+ Subtarget->isTargetDarwin()) {
// Emit initial debug information.
DW.BeginModule(&M);
}
// from how MASM does things. When making changes here don't forget to look
// at X86IntelAsmPrinter::doFinalization().
const TargetData *TD = TM.getTargetData();
-
+
// Print out module-level global variables here.
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
- if (!I->hasInitializer()) continue; // External global require no code
+ if (!I->hasInitializer())
+ continue; // External global require no code
// Check to see if this is a special global used by LLVM, if so, emit it.
if (EmitSpecialLLVMGlobal(I))
std::string name = Mang->getValueName(I);
Constant *C = I->getInitializer();
unsigned Size = TD->getTypeSize(C->getType());
- unsigned Align = getPreferredAlignmentLog(I);
+ unsigned Align = TD->getPreferredAlignmentLog(I);
if (C->isNullValue() && /* FIXME: Verify correct */
+ !I->hasSection() &&
(I->hasInternalLinkage() || I->hasWeakLinkage() ||
I->hasLinkOnceLinkage() ||
(Subtarget->isTargetDarwin() &&
- I->hasExternalLinkage() && !I->hasSection()))) {
+ I->hasExternalLinkage()))) {
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
if (I->hasExternalLinkage()) {
O << "\t.globl\t" << name << "\n";
O << "\t.zerofill __DATA__, __common, " << name << ", "
<< Size << ", " << Align;
} else {
- SwitchToDataSection(TAI->getDataSection(), I);
+ if (!NoZerosInBSS && TAI->getBSSSection())
+ SwitchToDataSection(TAI->getBSSSection(), I);
+ else
+ SwitchToDataSection(TAI->getDataSection(), I);
if (TAI->getLCOMMDirective() != NULL) {
if (I->hasInternalLinkage()) {
O << TAI->getLCOMMDirective() << name << "," << Size;
} else
O << TAI->getCOMMDirective() << name << "," << Size;
} else {
- if (!Subtarget->isTargetCygwin()) {
+ if (!Subtarget->isTargetCygMing()) {
if (I->hasInternalLinkage())
O << "\t.local\t" << name << "\n";
}
O << "\t.globl " << name << "\n"
<< "\t.weak_definition " << name << "\n";
SwitchToDataSection(".section __DATA,__const_coal,coalesced", I);
- } else if (Subtarget->isTargetCygwin()) {
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\"\n"
- << "\t.weak " << name << "\n";
+ } else if (Subtarget->isTargetCygMing()) {
+ std::string SectionName(".section\t.data$linkonce." +
+ name +
+ ",\"aw\"");
+ SwitchToDataSection(SectionName.c_str(), I);
+ O << "\t.globl " << name << "\n"
+ << "\t.linkonce same_size\n";
} else {
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n"
- << "\t.weak " << name << "\n";
+ std::string SectionName("\t.section\t.llvm.linkonce.d." +
+ name +
+ ",\"aw\",@progbits");
+ SwitchToDataSection(SectionName.c_str(), I);
+ O << "\t.weak " << name << "\n";
}
break;
case GlobalValue::AppendingLinkage:
// If external or appending, declare as a global symbol
O << "\t.globl " << name << "\n";
// FALL THROUGH
- case GlobalValue::InternalLinkage:
- SwitchToDataSection(TAI->getDataSection(), I);
+ case GlobalValue::InternalLinkage: {
+ if (I->isConstant()) {
+ const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
+ if (TAI->getCStringSection() && CVA && CVA->isCString()) {
+ SwitchToDataSection(TAI->getCStringSection(), I);
+ break;
+ }
+ }
+ // FIXME: special handling for ".ctors" & ".dtors" sections
+ if (I->hasSection() &&
+ (I->getSection() == ".ctors" ||
+ I->getSection() == ".dtors")) {
+ std::string SectionName = ".section " + I->getSection();
+
+ if (Subtarget->isTargetCygMing()) {
+ SectionName += ",\"aw\"";
+ } else {
+ assert(!Subtarget->isTargetDarwin());
+ SectionName += ",\"aw\",@progbits";
+ }
+
+ SwitchToDataSection(SectionName.c_str());
+ } else {
+ if (C->isNullValue() && !NoZerosInBSS && TAI->getBSSSection())
+ SwitchToDataSection(TAI->getBSSSection(), I);
+ else
+ SwitchToDataSection(TAI->getDataSection(), I);
+ }
+
break;
+ }
default:
assert(0 && "Unknown linkage type!");
}
<< "\n";
if (TAI->hasDotTypeDotSizeDirective())
O << "\t.size " << name << ", " << Size << "\n";
+ // If the initializer is a extern weak symbol, remember to emit the weak
+ // reference!
+ if (const GlobalValue *GV = dyn_cast<GlobalValue>(C))
+ if (GV->hasExternalWeakLinkage())
+ ExtWeakSymbols.insert(GV);
EmitGlobalConstant(C);
O << '\n';
}
+ if (I->hasHiddenVisibility())
+ if (const char *Directive = TAI->getHiddenDirective())
+ O << Directive << name << "\n";
+
+ if (Subtarget->isTargetELF())
+ O << "\t.type " << name << ",@object\n";
}
// Output linker support code for dllexported globals
if (DLLExportedGVs.begin() != DLLExportedGVs.end()) {
- SwitchToDataSection(".section .drectve", 0);
+ SwitchToDataSection(".section .drectve");
}
for (std::set<std::string>::iterator i = DLLExportedGVs.begin(),
}
if (DLLExportedFns.begin() != DLLExportedFns.end()) {
- SwitchToDataSection(".section .drectve", 0);
+ SwitchToDataSection(".section .drectve");
}
for (std::set<std::string>::iterator i = DLLExportedFns.begin(),
i != e; ++i) {
O << "\t.ascii \" -export:" << *i << "\"\n";
}
-
+
if (Subtarget->isTargetDarwin()) {
- SwitchToDataSection("", 0);
+ SwitchToDataSection("");
// Output stubs for dynamically-linked functions
unsigned j = 1;
// Output stubs for external and common global variables.
if (GVStubs.begin() != GVStubs.end())
SwitchToDataSection(
- ".section __IMPORT,__pointers,non_lazy_symbol_pointers", 0);
+ ".section __IMPORT,__pointers,non_lazy_symbol_pointers");
for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
i != e; ++i) {
O << "L" << *i << "$non_lazy_ptr:\n";
O << "\t.long\t0\n";
}
- // Emit initial debug information.
+ // Emit final debug information.
DW.EndModule();
// Funny Darwin hack: This flag tells the linker that no global symbols
// linker can safely perform dead code stripping. Since LLVM never
// generates code that does this, it is always safe to set.
O << "\t.subsections_via_symbols\n";
+ } else if (Subtarget->isTargetCygMing()) {
+ // Emit type information for external functions
+ for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
+ i != e; ++i) {
+ O << "\t.def\t " << *i
+ << ";\t.scl\t" << COFF::C_EXT
+ << ";\t.type\t" << (COFF::DT_FCN << COFF::N_BTSHFT)
+ << ";\t.endef\n";
+ }
+
+ // Emit final debug information.
+ DW.EndModule();
+ } else if (Subtarget->isTargetELF()) {
+ // Emit final debug information.
+ DW.EndModule();
}
AsmPrinter::doFinalization(M);
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