//
//===----------------------------------------------------------------------===//
+#include "X86AsmPrinter.h"
#include "X86ATTAsmPrinter.h"
#include "X86IntelAsmPrinter.h"
#include "X86Subtarget.h"
-#include "X86.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Support/CommandLine.h"
using namespace llvm;
-using namespace x86;
-Statistic<> llvm::x86::EmittedInsts("asm-printer",
- "Number of machine instrs printed");
+Statistic<> llvm::EmittedInsts("asm-printer",
+ "Number of machine instrs printed");
enum AsmWriterFlavorTy { att, intel };
cl::opt<AsmWriterFlavorTy>
const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
forDarwin = false;
+ PrivateGlobalPrefix = ".L";
switch (Subtarget->TargetType) {
case X86Subtarget::isDarwin:
forDarwin = true;
StaticCtorsSection = ".mod_init_func";
StaticDtorsSection = ".mod_term_func";
+ InlineAsmStart = InlineAsmEnd = ""; // Don't use #APP/#NO_APP
break;
case X86Subtarget::isCygwin:
GlobalPrefix = "_";
default: break;
}
+ if (forDarwin) {
+ // Emit initial debug information.
+ DW.BeginModule(&M);
+ }
+
return AsmPrinter::doInitialization(M);
}
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) {
+ 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
// Check to see if this is a special global used by LLVM, if so, emit it.
- if (I->hasAppendingLinkage() && EmitSpecialLLVMGlobal(I))
+ if (EmitSpecialLLVMGlobal(I))
continue;
- O << "\n\n";
std::string name = Mang->getValueName(I);
Constant *C = I->getInitializer();
unsigned Size = TD.getTypeSize(C->getType());
- unsigned Align = TD.getTypeAlignmentShift(C->getType());
-
- switch (I->getLinkage()) {
- default: assert(0 && "Unknown linkage type!");
- case GlobalValue::LinkOnceLinkage:
- case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
- if (C->isNullValue()) {
- O << COMMDirective << name << "," << Size;
- if (COMMDirectiveTakesAlignment)
- O << "," << (1 << Align);
- O << "\t\t" << CommentString << " " << I->getName() << "\n";
- continue;
- }
-
- // Nonnull linkonce -> weak
- O << "\t.weak " << name << "\n";
- O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
- SwitchSection("", I);
- break;
- case GlobalValue::InternalLinkage:
- if (C->isNullValue()) {
- if (LCOMMDirective) {
- O << LCOMMDirective << name << "," << Size << "," << Align;
- continue;
+ unsigned Align = getPreferredAlignmentLog(I);
+
+ if (C->isNullValue() && /* FIXME: Verify correct */
+ (I->hasInternalLinkage() || I->hasWeakLinkage() ||
+ I->hasLinkOnceLinkage() ||
+ (forDarwin && I->hasExternalLinkage() && !I->hasSection()))) {
+ 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 {
+ SwitchSection(".data", I);
+ if (LCOMMDirective != NULL) {
+ if (I->hasInternalLinkage()) {
+ O << LCOMMDirective << name << "," << Size;
+ if (forDarwin)
+ O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
+ } else
+ O << COMMDirective << name << "," << Size;
} else {
- SwitchSection(".bss", I);
- O << "\t.local " << name << "\n";
- O << COMMDirective << name << "," << Size;
+ if (I->hasInternalLinkage())
+ O << "\t.local\t" << name << "\n";
+ O << COMMDirective << name << "," << Size;
if (COMMDirectiveTakesAlignment)
- O << "," << (1 << Align);
- O << "\t\t# ";
- WriteAsOperand(O, I, true, true, &M);
- O << "\n";
- continue;
+ O << "," << (AlignmentIsInBytes ? (1 << Align) : Align);
}
}
- SwitchSection(".data", I);
- break;
- case GlobalValue::AppendingLinkage:
- // FIXME: appending linkage variables should go into a section of
- // their name or something. For now, just emit them as external.
- case GlobalValue::ExternalLinkage:
- SwitchSection(C->isNullValue() ? ".bss" : ".data", I);
- // If external or appending, declare as a global symbol
- O << "\t.globl " << name << "\n";
- break;
- }
+ O << "\t\t" << CommentString << " " << I->getName() << "\n";
+ } else {
+ switch (I->getLinkage()) {
+ case GlobalValue::LinkOnceLinkage:
+ case GlobalValue::WeakLinkage:
+ if (forDarwin) {
+ O << "\t.globl " << name << "\n"
+ << "\t.weak_definition " << name << "\n";
+ SwitchSection(".section __DATA,__datacoal_nt,coalesced", I);
+ } else {
+ O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\n";
+ O << "\t.weak " << name << "\n";
+ }
+ break;
+ case GlobalValue::AppendingLinkage:
+ // FIXME: appending linkage variables should go into a section of
+ // their name or something. For now, just emit them as external.
+ case GlobalValue::ExternalLinkage:
+ // If external or appending, declare as a global symbol
+ O << "\t.globl " << name << "\n";
+ // FALL THROUGH
+ case GlobalValue::InternalLinkage:
+ SwitchSection(".data", I);
+ break;
+ default:
+ assert(0 && "Unknown linkage type!");
+ }
+
+ EmitAlignment(Align, I);
+ O << name << ":\t\t\t\t" << CommentString << " " << I->getName()
+ << "\n";
+ if (HasDotTypeDotSizeDirective)
+ O << "\t.size " << name << ", " << Size << "\n";
- EmitAlignment(Align);
- if (HasDotTypeDotSizeDirective) {
- O << "\t.type " << name << ",@object\n";
- O << "\t.size " << name << "," << Size << "\n";
+ EmitGlobalConstant(C);
+ O << '\n';
}
- O << name << ":\t\t\t" << CommentString << ' ' << I->getName() << '\n';
- EmitGlobalConstant(C);
}
if (forDarwin) {
SwitchSection("", 0);
- // Output stubs for external global variables
- if (GVStubs.begin() != GVStubs.end())
- O << "\t.non_lazy_symbol_pointer\n";
- for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
- i != e; ++i) {
- O << "L" << *i << "$non_lazy_ptr:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\t.long\t0\n";
- }
// Output stubs for dynamically-linked functions
unsigned j = 1;
for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
i != e; ++i, ++j) {
- O << "\t.symbol_stub\n";
+ SwitchSection(".section __IMPORT,__jump_table,symbol_stubs,"
+ "self_modifying_code+pure_instructions,5", 0);
O << "L" << *i << "$stub:\n";
O << "\t.indirect_symbol " << *i << "\n";
- O << "\tjmp\t*L" << j << "$lz\n";
- O << "L" << *i << "$stub_binder:\n";
- O << "\tpushl\t$L" << j << "$lz\n";
- O << "\tjmp\tdyld_stub_binding_helper\n";
- O << "\t.section __DATA, __la_sym_ptr3,lazy_symbol_pointers\n";
- O << "L" << j << "$lz:\n";
- O << "\t.indirect_symbol " << *i << "\n";
- O << "\t.long\tL" << *i << "$stub_binder\n";
+ O << "\thlt ; hlt ; hlt ; hlt ; hlt\n";
}
O << "\n";
- // Output stubs for link-once variables
- if (LinkOnceStubs.begin() != LinkOnceStubs.end())
- O << ".data\n.align 2\n";
- for (std::set<std::string>::iterator i = LinkOnceStubs.begin(),
- e = LinkOnceStubs.end(); i != e; ++i) {
- O << "L" << *i << "$non_lazy_ptr:\n"
- << "\t.long\t" << *i << '\n';
+ // Output stubs for external and common global variables.
+ if (GVStubs.begin() != GVStubs.end())
+ SwitchSection(".section __IMPORT,__pointers,non_lazy_symbol_pointers", 0);
+ for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
+ i != e; ++i) {
+ O << "L" << *i << "$non_lazy_ptr:\n";
+ O << "\t.indirect_symbol " << *i << "\n";
+ O << "\t.long\t0\n";
}
+
+ // Emit initial debug information.
+ DW.EndModule();
+
+ // Funny Darwin hack: This flag tells the linker that no global symbols
+ // contain code that falls through to other global symbols (e.g. the obvious
+ // implementation of multiple entry points). If this doesn't occur, the
+ // 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";
}
AsmPrinter::doFinalization(M);
/// for a MachineFunction to the given output stream, using the given target
/// machine description.
///
-FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,TargetMachine &tm){
+FunctionPass *llvm::createX86CodePrinterPass(std::ostream &o,
+ X86TargetMachine &tm){
switch (AsmWriterFlavor) {
default:
assert(0 && "Unknown asm flavor!");
projects / oota-llvm.git / blobdiff