//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "asm-printer"
#include "X86IntelAsmPrinter.h"
#include "X86TargetAsmInfo.h"
#include "X86.h"
+#include "llvm/CallingConv.h"
#include "llvm/Constants.h"
#include "llvm/Module.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/Support/Mangler.h"
#include "llvm/Target/TargetAsmInfo.h"
#include "llvm/Target/TargetOptions.h"
+#include "llvm/ADT/Statistic.h"
using namespace llvm;
+STATISTIC(EmittedInsts, "Number of machine instrs printed");
+
+std::string X86IntelAsmPrinter::getSectionForFunction(const Function &F) const {
+ // Intel asm always emits functions to _text.
+ return "_text";
+}
+
/// runOnMachineFunction - This uses the printMachineInstruction()
/// method to print assembly for each instruction.
///
EmitConstantPool(MF.getConstantPool());
// Print out labels for the function.
- SwitchToTextSection("_text", MF.getFunction());
- EmitAlignment(4);
- if (MF.getFunction()->getLinkage() == GlobalValue::ExternalLinkage)
+ const Function *F = MF.getFunction();
+ unsigned CC = F->getCallingConv();
+
+ // Populate function information map. Actually, We don't want to populate
+ // non-stdcall or non-fastcall functions' information right now.
+ if (CC == CallingConv::X86_StdCall || CC == CallingConv::X86_FastCall)
+ FunctionInfoMap[F] = *MF.getInfo<X86MachineFunctionInfo>();
+
+ X86SharedAsmPrinter::decorateName(CurrentFnName, F);
+
+ SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
+
+ unsigned FnAlign = OptimizeForSize ? 1 : 4;
+ switch (F->getLinkage()) {
+ default: assert(0 && "Unsupported linkage type!");
+ case Function::InternalLinkage:
+ EmitAlignment(FnAlign);
+ break;
+ case Function::DLLExportLinkage:
+ DLLExportedFns.insert(CurrentFnName);
+ //FALLS THROUGH
+ case Function::ExternalLinkage:
O << "\tpublic " << CurrentFnName << "\n";
+ EmitAlignment(FnAlign);
+ break;
+ }
+
O << CurrentFnName << "\tproc near\n";
// Print out code for the function.
for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
I != E; ++I) {
// Print a label for the basic block if there are any predecessors.
- if (I->pred_begin() != I->pred_end()) {
- printBasicBlockLabel(I, true);
+ if (!I->pred_empty()) {
+ printBasicBlockLabel(I, true, true);
O << '\n';
}
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
II != E; ++II) {
// Print the assembly for the instruction.
- O << "\t";
printMachineInstruction(II);
}
}
+ // Print out jump tables referenced by the function.
+ EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
+
O << CurrentFnName << "\tendp\n";
// We didn't modify anything.
}
void X86IntelAsmPrinter::printSSECC(const MachineInstr *MI, unsigned Op) {
- unsigned char value = MI->getOperand(Op).getImmedValue();
+ unsigned char value = MI->getOperand(Op).getImm();
assert(value <= 7 && "Invalid ssecc argument!");
switch (value) {
case 0: O << "eq"; break;
void X86IntelAsmPrinter::printOp(const MachineOperand &MO,
const char *Modifier) {
- const MRegisterInfo &RI = *TM.getRegisterInfo();
switch (MO.getType()) {
- case MachineOperand::MO_Register:
- if (MRegisterInfo::isPhysicalRegister(MO.getReg())) {
+ case MachineOperand::MO_Register: {
+ if (TargetRegisterInfo::isPhysicalRegister(MO.getReg())) {
unsigned Reg = MO.getReg();
if (Modifier && strncmp(Modifier, "subreg", strlen("subreg")) == 0) {
- MVT::ValueType VT = (strcmp(Modifier,"subreg16") == 0)
- ? MVT::i16 : MVT::i8;
+ MVT VT = (strcmp(Modifier,"subreg64") == 0) ?
+ MVT::i64 : ((strcmp(Modifier, "subreg32") == 0) ? MVT::i32 :
+ ((strcmp(Modifier,"subreg16") == 0) ? MVT::i16 :MVT::i8));
Reg = getX86SubSuperRegister(Reg, VT);
}
- O << RI.get(Reg).Name;
+ O << TRI->getAsmName(Reg);
} else
O << "reg" << MO.getReg();
return;
-
+ }
case MachineOperand::MO_Immediate:
- O << MO.getImmedValue();
+ O << MO.getImm();
return;
case MachineOperand::MO_MachineBasicBlock:
- printBasicBlockLabel(MO.getMachineBasicBlock());
+ printBasicBlockLabel(MO.getMBB());
+ return;
+ case MachineOperand::MO_JumpTableIndex: {
+ bool isMemOp = Modifier && !strcmp(Modifier, "mem");
+ if (!isMemOp) O << "OFFSET ";
+ O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
+ << "_" << MO.getIndex();
return;
+ }
case MachineOperand::MO_ConstantPoolIndex: {
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
if (!isMemOp) O << "OFFSET ";
O << "[" << TAI->getPrivateGlobalPrefix() << "CPI"
- << getFunctionNumber() << "_" << MO.getConstantPoolIndex();
+ << getFunctionNumber() << "_" << MO.getIndex();
int Offset = MO.getOffset();
if (Offset > 0)
O << " + " << Offset;
case MachineOperand::MO_GlobalAddress: {
bool isCallOp = Modifier && !strcmp(Modifier, "call");
bool isMemOp = Modifier && !strcmp(Modifier, "mem");
+ GlobalValue *GV = MO.getGlobal();
+ std::string Name = Mang->getValueName(GV);
+
+ X86SharedAsmPrinter::decorateName(Name, GV);
+
if (!isMemOp && !isCallOp) O << "OFFSET ";
- O << Mang->getValueName(MO.getGlobal());
+ if (GV->hasDLLImportLinkage()) {
+ // FIXME: This should be fixed with full support of stdcall & fastcall
+ // CC's
+ O << "__imp_";
+ }
+ O << Name;
int Offset = MO.getOffset();
if (Offset > 0)
O << " + " << Offset;
}
}
-void X86IntelAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op){
+void X86IntelAsmPrinter::printMemReference(const MachineInstr *MI, unsigned Op,
+ const char *Modifier) {
assert(isMem(MI, Op) && "Invalid memory reference!");
const MachineOperand &BaseReg = MI->getOperand(Op);
- int ScaleVal = MI->getOperand(Op+1).getImmedValue();
+ int ScaleVal = MI->getOperand(Op+1).getImm();
const MachineOperand &IndexReg = MI->getOperand(Op+2);
const MachineOperand &DispSpec = MI->getOperand(Op+3);
- if (BaseReg.isFrameIndex()) {
- O << "[frame slot #" << BaseReg.getFrameIndex();
- if (DispSpec.getImmedValue())
- O << " + " << DispSpec.getImmedValue();
- O << "]";
- return;
- }
-
O << "[";
bool NeedPlus = false;
if (BaseReg.getReg()) {
- printOp(BaseReg, "mem");
+ printOp(BaseReg, Modifier);
NeedPlus = true;
}
if (NeedPlus) O << " + ";
if (ScaleVal != 1)
O << ScaleVal << "*";
- printOp(IndexReg);
+ printOp(IndexReg, Modifier);
NeedPlus = true;
}
- if (DispSpec.isGlobalAddress() || DispSpec.isConstantPoolIndex()) {
+ if (DispSpec.isGlobalAddress() || DispSpec.isConstantPoolIndex() ||
+ DispSpec.isJumpTableIndex()) {
if (NeedPlus)
O << " + ";
printOp(DispSpec, "mem");
} else {
- int DispVal = DispSpec.getImmedValue();
+ int DispVal = DispSpec.getImm();
if (DispVal || (!BaseReg.getReg() && !IndexReg.getReg())) {
- if (NeedPlus)
+ if (NeedPlus) {
if (DispVal > 0)
O << " + ";
else {
O << " - ";
DispVal = -DispVal;
}
+ }
O << DispVal;
}
}
O << "]";
}
+void X86IntelAsmPrinter::printPICJumpTableSetLabel(unsigned uid,
+ const MachineBasicBlock *MBB) const {
+ if (!TAI->getSetDirective())
+ return;
+
+ O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
+ << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
+ printBasicBlockLabel(MBB, false, false, false);
+ O << '-' << "\"L" << getFunctionNumber() << "$pb\"'\n";
+}
+
void X86IntelAsmPrinter::printPICLabel(const MachineInstr *MI, unsigned Op) {
O << "\"L" << getFunctionNumber() << "$pb\"\n";
O << "\"L" << getFunctionNumber() << "$pb\":";
bool X86IntelAsmPrinter::printAsmMRegister(const MachineOperand &MO,
const char Mode) {
- const MRegisterInfo &RI = *TM.getRegisterInfo();
unsigned Reg = MO.getReg();
switch (Mode) {
default: return true; // Unknown mode.
break;
}
- O << '%' << RI.get(Reg).Name;
+ O << '%' << TRI->getAsmName(Reg);
return false;
}
void X86IntelAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
++EmittedInsts;
- // See if a truncate instruction can be turned into a nop.
- switch (MI->getOpcode()) {
- default: break;
- case X86::TRUNC_GR32_GR16:
- case X86::TRUNC_GR32_GR8:
- case X86::TRUNC_GR16_GR8: {
- const MachineOperand &MO0 = MI->getOperand(0);
- const MachineOperand &MO1 = MI->getOperand(1);
- unsigned Reg0 = MO0.getReg();
- unsigned Reg1 = MO1.getReg();
- if (MI->getOpcode() == X86::TRUNC_GR32_GR16)
- Reg1 = getX86SubSuperRegister(Reg1, MVT::i16);
- else
- Reg1 = getX86SubSuperRegister(Reg1, MVT::i8);
- O << TAI->getCommentString() << " TRUNCATE ";
- if (Reg0 != Reg1)
- O << "\n\t";
- break;
- }
- }
-
// Call the autogenerated instruction printer routines.
printInstruction(MI);
}
bool X86IntelAsmPrinter::doInitialization(Module &M) {
- X86SharedAsmPrinter::doInitialization(M);
+ bool Result = X86SharedAsmPrinter::doInitialization(M);
Mang->markCharUnacceptable('.');
// Emit declarations for external functions.
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
- if (I->isExternal())
- O << "\textern " << Mang->getValueName(I) << ":near\n";
-
+ if (I->isDeclaration()) {
+ std::string Name = Mang->getValueName(I);
+ X86SharedAsmPrinter::decorateName(Name, I);
+
+ O << "\textern " ;
+ if (I->hasDLLImportLinkage()) {
+ O << "__imp_";
+ }
+ O << Name << ":near\n";
+ }
+
// Emit declarations for external globals. Note that VC++ always declares
// external globals to have type byte, and if that's good enough for VC++...
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
I != E; ++I) {
- if (I->isExternal())
- O << "\textern " << Mang->getValueName(I) << ":byte\n";
+ if (I->isDeclaration()) {
+ std::string Name = Mang->getValueName(I);
+
+ O << "\textern " ;
+ if (I->hasDLLImportLinkage()) {
+ O << "__imp_";
+ }
+ O << Name << ":byte\n";
+ }
}
- return false;
+ return Result;
}
bool X86IntelAsmPrinter::doFinalization(Module &M) {
// 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->isExternal()) continue; // External global require no code
+ if (I->isDeclaration()) 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);
bool bCustomSegment = false;
switch (I->getLinkage()) {
+ case GlobalValue::CommonLinkage:
case GlobalValue::LinkOnceLinkage:
case GlobalValue::WeakLinkage:
- SwitchToDataSection("", 0);
+ SwitchToDataSection("");
O << name << "?\tsegment common 'COMMON'\n";
bCustomSegment = true;
// FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256
// are also available.
break;
case GlobalValue::AppendingLinkage:
- SwitchToDataSection("", 0);
+ SwitchToDataSection("");
O << name << "?\tsegment public 'DATA'\n";
bCustomSegment = true;
// FIXME: the default alignment is 16 bytes, but 1, 2, 4, and 256
// are also available.
break;
+ case GlobalValue::DLLExportLinkage:
+ DLLExportedGVs.insert(name);
+ // FALL THROUGH
case GlobalValue::ExternalLinkage:
O << "\tpublic " << name << "\n";
// FALL THROUGH
if (bCustomSegment)
O << name << "?\tends\n";
}
+
+ // Output linker support code for dllexported globals
+ if (!DLLExportedGVs.empty() ||
+ !DLLExportedFns.empty()) {
+ SwitchToDataSection("");
+ O << "; WARNING: The following code is valid only with MASM v8.x and (possible) higher\n"
+ << "; This version of MASM is usually shipped with Microsoft Visual Studio 2005\n"
+ << "; or (possible) further versions. Unfortunately, there is no way to support\n"
+ << "; dllexported symbols in the earlier versions of MASM in fully automatic way\n\n";
+ O << "_drectve\t segment info alias('.drectve')\n";
+ }
+
+ for (std::set<std::string>::iterator i = DLLExportedGVs.begin(),
+ e = DLLExportedGVs.end();
+ i != e; ++i) {
+ O << "\t db ' /EXPORT:" << *i << ",data'\n";
+ }
+
+ for (std::set<std::string>::iterator i = DLLExportedFns.begin(),
+ e = DLLExportedFns.end();
+ i != e; ++i) {
+ O << "\t db ' /EXPORT:" << *i << "'\n";
+ }
+
+ if (!DLLExportedGVs.empty() ||
+ !DLLExportedFns.empty()) {
+ O << "_drectve\t ends\n";
+ }
// Bypass X86SharedAsmPrinter::doFinalization().
- AsmPrinter::doFinalization(M);
- SwitchToDataSection("", 0);
+ bool Result = AsmPrinter::doFinalization(M);
+ SwitchToDataSection("");
O << "\tend\n";
- return false; // success
+ return Result;
}
void X86IntelAsmPrinter::EmitString(const ConstantArray *CVA) const {
unsigned len = 0;
bool inString = false;
for (unsigned i = 0; i < NumElts; i++) {
- int n = cast<ConstantInt>(CVA->getOperand(i))->getRawValue() & 255;
+ int n = cast<ConstantInt>(CVA->getOperand(i))->getZExtValue() & 255;
if (len == 0)
O << "\tdb ";
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