//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "asm-printer"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/Constants.h"
-#include "llvm/InlineAsm.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Module.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/InlineAsm.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetAsmParser.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegisterInfo.h"
+#include "llvm/Target/TargetSubtargetInfo.h"
using namespace llvm;
+#define DEBUG_TYPE "asm-printer"
+
namespace {
struct SrcMgrDiagInfo {
const MDNode *LocInfo;
if (LocInfo->getNumOperands() != 0)
if (const ConstantInt *CI =
- dyn_cast<ConstantInt>(LocInfo->getOperand(ErrorLine)))
+ mdconst::dyn_extract<ConstantInt>(LocInfo->getOperand(ErrorLine)))
LocCookie = CI->getZExtValue();
}
}
/// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
-void AsmPrinter::EmitInlineAsm(StringRef Str, const MDNode *LocMDNode,
+void AsmPrinter::EmitInlineAsm(StringRef Str, const MCSubtargetInfo &STI,
+ const MCTargetOptions &MCOptions,
+ const MDNode *LocMDNode,
InlineAsm::AsmDialect Dialect) const {
assert(!Str.empty() && "Can't emit empty inline asm block");
if (isNullTerminated)
Str = Str.substr(0, Str.size()-1);
- // If the output streamer is actually a .s file, just emit the blob textually.
+ // If the output streamer does not have mature MC support or the integrated
+ // assembler has been disabled, just emit the blob textually.
+ // Otherwise parse the asm and emit it via MC support.
// This is useful in case the asm parser doesn't handle something but the
// system assembler does.
- if (OutStreamer.hasRawTextSupport()) {
- OutStreamer.EmitRawText(Str);
+ const MCAsmInfo *MCAI = TM.getMCAsmInfo();
+ assert(MCAI && "No MCAsmInfo");
+ if (!MCAI->useIntegratedAssembler() &&
+ !OutStreamer->isIntegratedAssemblerRequired()) {
+ emitInlineAsmStart();
+ OutStreamer->EmitRawText(Str);
+ emitInlineAsmEnd(STI, nullptr);
return;
}
// If the current LLVMContext has an inline asm handler, set it in SourceMgr.
LLVMContext &LLVMCtx = MMI->getModule()->getContext();
bool HasDiagHandler = false;
- if (LLVMCtx.getInlineAsmDiagnosticHandler() != 0) {
+ if (LLVMCtx.getInlineAsmDiagnosticHandler() != nullptr) {
// If the source manager has an issue, we arrange for srcMgrDiagHandler
// to be invoked, getting DiagInfo passed into it.
DiagInfo.LocInfo = LocMDNode;
HasDiagHandler = true;
}
- MemoryBuffer *Buffer;
+ std::unique_ptr<MemoryBuffer> Buffer;
if (isNullTerminated)
Buffer = MemoryBuffer::getMemBuffer(Str, "<inline asm>");
else
Buffer = MemoryBuffer::getMemBufferCopy(Str, "<inline asm>");
// Tell SrcMgr about this buffer, it takes ownership of the buffer.
- SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());
-
- OwningPtr<MCAsmParser> Parser(createMCAsmParser(SrcMgr,
- OutContext, OutStreamer,
- *MAI));
-
- // FIXME: It would be nice if we can avoid createing a new instance of
- // MCSubtargetInfo here given TargetSubtargetInfo is available. However,
- // we have to watch out for asm directives which can change subtarget
- // state. e.g. .code 16, .code 32.
- OwningPtr<MCSubtargetInfo>
- STI(TM.getTarget().createMCSubtargetInfo(TM.getTargetTriple(),
- TM.getTargetCPU(),
- TM.getTargetFeatureString()));
- OwningPtr<MCTargetAsmParser>
- TAP(TM.getTarget().createMCAsmParser(*STI, *Parser));
+ SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
+
+ std::unique_ptr<MCAsmParser> Parser(
+ createMCAsmParser(SrcMgr, OutContext, *OutStreamer, *MAI));
+
+ // We create a new MCInstrInfo here since we might be at the module level
+ // and not have a MachineFunction to initialize the TargetInstrInfo from and
+ // we only need MCInstrInfo for asm parsing. We create one unconditionally
+ // because it's not subtarget dependent.
+ std::unique_ptr<MCInstrInfo> MII(TM.getTarget().createMCInstrInfo());
+ std::unique_ptr<MCTargetAsmParser> TAP(TM.getTarget().createMCAsmParser(
+ STI, *Parser, *MII, MCOptions));
if (!TAP)
report_fatal_error("Inline asm not supported by this streamer because"
" we don't have an asm parser for this target\n");
Parser->setAssemblerDialect(Dialect);
Parser->setTargetParser(*TAP.get());
+ if (MF) {
+ const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
+ TAP->SetFrameRegister(TRI->getFrameRegister(*MF));
+ }
+ emitInlineAsmStart();
// Don't implicitly switch to the text section before the asm.
int Res = Parser->Run(/*NoInitialTextSection*/ true,
/*NoFinalize*/ true);
+ emitInlineAsmEnd(STI, &TAP->getSTI());
if (Res && !HasDiagHandler)
report_fatal_error("Error parsing inline asm\n");
}
+static void EmitMSInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
+ MachineModuleInfo *MMI, int InlineAsmVariant,
+ AsmPrinter *AP, unsigned LocCookie,
+ raw_ostream &OS) {
+ // Switch to the inline assembly variant.
+ OS << "\t.intel_syntax\n\t";
-/// EmitInlineAsm - This method formats and emits the specified machine
-/// instruction that is an inline asm.
-void AsmPrinter::EmitInlineAsm(const MachineInstr *MI) const {
- assert(MI->isInlineAsm() && "printInlineAsm only works on inline asms");
-
+ const char *LastEmitted = AsmStr; // One past the last character emitted.
unsigned NumOperands = MI->getNumOperands();
- // Count the number of register definitions to find the asm string.
- unsigned NumDefs = 0;
- for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
- ++NumDefs)
- assert(NumDefs != NumOperands-2 && "No asm string?");
+ while (*LastEmitted) {
+ switch (*LastEmitted) {
+ default: {
+ // Not a special case, emit the string section literally.
+ const char *LiteralEnd = LastEmitted+1;
+ while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
+ *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
+ ++LiteralEnd;
- assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
+ OS.write(LastEmitted, LiteralEnd-LastEmitted);
+ LastEmitted = LiteralEnd;
+ break;
+ }
+ case '\n':
+ ++LastEmitted; // Consume newline character.
+ OS << '\n'; // Indent code with newline.
+ break;
+ case '$': {
+ ++LastEmitted; // Consume '$' character.
+ bool Done = true;
- // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
- const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
+ // Handle escapes.
+ switch (*LastEmitted) {
+ default: Done = false; break;
+ case '$':
+ ++LastEmitted; // Consume second '$' character.
+ break;
+ }
+ if (Done) break;
- // If this asmstr is empty, just print the #APP/#NOAPP markers.
- // These are useful to see where empty asm's wound up.
- if (AsmStr[0] == 0) {
- // Don't emit the comments if writing to a .o file.
- if (!OutStreamer.hasRawTextSupport()) return;
+ const char *IDStart = LastEmitted;
+ const char *IDEnd = IDStart;
+ while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
- OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+
- MAI->getInlineAsmStart());
- OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+
- MAI->getInlineAsmEnd());
- return;
- }
+ unsigned Val;
+ if (StringRef(IDStart, IDEnd-IDStart).getAsInteger(10, Val))
+ report_fatal_error("Bad $ operand number in inline asm string: '" +
+ Twine(AsmStr) + "'");
+ LastEmitted = IDEnd;
- // Emit the #APP start marker. This has to happen even if verbose-asm isn't
- // enabled, so we use EmitRawText.
- if (OutStreamer.hasRawTextSupport())
- OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+
- MAI->getInlineAsmStart());
+ if (Val >= NumOperands-1)
+ report_fatal_error("Invalid $ operand number in inline asm string: '" +
+ Twine(AsmStr) + "'");
- // Get the !srcloc metadata node if we have it, and decode the loc cookie from
- // it.
- unsigned LocCookie = 0;
- const MDNode *LocMD = 0;
- for (unsigned i = MI->getNumOperands(); i != 0; --i) {
- if (MI->getOperand(i-1).isMetadata() &&
- (LocMD = MI->getOperand(i-1).getMetadata()) &&
- LocMD->getNumOperands() != 0) {
- if (const ConstantInt *CI = dyn_cast<ConstantInt>(LocMD->getOperand(0))) {
- LocCookie = CI->getZExtValue();
- break;
- }
- }
- }
+ // Okay, we finally have a value number. Ask the target to print this
+ // operand!
+ unsigned OpNo = InlineAsm::MIOp_FirstOperand;
- // Emit the inline asm to a temporary string so we can emit it through
- // EmitInlineAsm.
- SmallString<256> StringData;
- raw_svector_ostream OS(StringData);
+ bool Error = false;
- OS << '\t';
+ // Scan to find the machine operand number for the operand.
+ for (; Val; --Val) {
+ if (OpNo >= MI->getNumOperands()) break;
+ unsigned OpFlags = MI->getOperand(OpNo).getImm();
+ OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
+ }
- // The variant of the current asmprinter.
- int AsmPrinterVariant = MAI->getAssemblerDialect();
+ // We may have a location metadata attached to the end of the
+ // instruction, and at no point should see metadata at any
+ // other point while processing. It's an error if so.
+ if (OpNo >= MI->getNumOperands() ||
+ MI->getOperand(OpNo).isMetadata()) {
+ Error = true;
+ } else {
+ unsigned OpFlags = MI->getOperand(OpNo).getImm();
+ ++OpNo; // Skip over the ID number.
+
+ if (InlineAsm::isMemKind(OpFlags)) {
+ Error = AP->PrintAsmMemoryOperand(MI, OpNo, InlineAsmVariant,
+ /*Modifier*/ nullptr, OS);
+ } else {
+ Error = AP->PrintAsmOperand(MI, OpNo, InlineAsmVariant,
+ /*Modifier*/ nullptr, OS);
+ }
+ }
+ if (Error) {
+ std::string msg;
+ raw_string_ostream Msg(msg);
+ Msg << "invalid operand in inline asm: '" << AsmStr << "'";
+ MMI->getModule()->getContext().emitError(LocCookie, Msg.str());
+ }
+ break;
+ }
+ }
+ }
+ OS << "\n\t.att_syntax\n" << (char)0; // null terminate string.
+}
+static void EmitGCCInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
+ MachineModuleInfo *MMI, int InlineAsmVariant,
+ int AsmPrinterVariant, AsmPrinter *AP,
+ unsigned LocCookie, raw_ostream &OS) {
int CurVariant = -1; // The number of the {.|.|.} region we are in.
const char *LastEmitted = AsmStr; // One past the last character emitted.
+ unsigned NumOperands = MI->getNumOperands();
+
+ OS << '\t';
while (*LastEmitted) {
switch (*LastEmitted) {
++LastEmitted;
const char *StrStart = LastEmitted;
const char *StrEnd = strchr(StrStart, '}');
- if (StrEnd == 0)
+ if (!StrEnd)
report_fatal_error("Unterminated ${:foo} operand in inline asm"
" string: '" + Twine(AsmStr) + "'");
std::string Val(StrStart, StrEnd);
- PrintSpecial(MI, OS, Val.c_str());
+ AP->PrintSpecial(MI, OS, Val.c_str());
LastEmitted = StrEnd+1;
break;
}
unsigned OpFlags = MI->getOperand(OpNo).getImm();
++OpNo; // Skip over the ID number.
- if (Modifier[0] == 'l') // labels are target independent
+ if (Modifier[0] == 'l') { // Labels are target independent.
// FIXME: What if the operand isn't an MBB, report error?
- OS << *MI->getOperand(OpNo).getMBB()->getSymbol();
- else {
- AsmPrinter *AP = const_cast<AsmPrinter*>(this);
+ const MCSymbol *Sym = MI->getOperand(OpNo).getMBB()->getSymbol();
+ Sym->print(OS, AP->MAI);
+ } else {
if (InlineAsm::isMemKind(OpFlags)) {
- Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
- Modifier[0] ? Modifier : 0,
+ Error = AP->PrintAsmMemoryOperand(MI, OpNo, InlineAsmVariant,
+ Modifier[0] ? Modifier : nullptr,
OS);
} else {
- Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
- Modifier[0] ? Modifier : 0, OS);
+ Error = AP->PrintAsmOperand(MI, OpNo, InlineAsmVariant,
+ Modifier[0] ? Modifier : nullptr, OS);
}
}
}
}
}
OS << '\n' << (char)0; // null terminate string.
- EmitInlineAsm(OS.str(), LocMD, MI->getInlineAsmDialect());
+}
+
+/// EmitInlineAsm - This method formats and emits the specified machine
+/// instruction that is an inline asm.
+void AsmPrinter::EmitInlineAsm(const MachineInstr *MI) const {
+ assert(MI->isInlineAsm() && "printInlineAsm only works on inline asms");
+
+ // Count the number of register definitions to find the asm string.
+ unsigned NumDefs = 0;
+ for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
+ ++NumDefs)
+ assert(NumDefs != MI->getNumOperands()-2 && "No asm string?");
+
+ assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
+
+ // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
+ const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
+
+ // If this asmstr is empty, just print the #APP/#NOAPP markers.
+ // These are useful to see where empty asm's wound up.
+ if (AsmStr[0] == 0) {
+ OutStreamer->emitRawComment(MAI->getInlineAsmStart());
+ OutStreamer->emitRawComment(MAI->getInlineAsmEnd());
+ return;
+ }
+
+ // Emit the #APP start marker. This has to happen even if verbose-asm isn't
+ // enabled, so we use emitRawComment.
+ OutStreamer->emitRawComment(MAI->getInlineAsmStart());
+
+ // Get the !srcloc metadata node if we have it, and decode the loc cookie from
+ // it.
+ unsigned LocCookie = 0;
+ const MDNode *LocMD = nullptr;
+ for (unsigned i = MI->getNumOperands(); i != 0; --i) {
+ if (MI->getOperand(i-1).isMetadata() &&
+ (LocMD = MI->getOperand(i-1).getMetadata()) &&
+ LocMD->getNumOperands() != 0) {
+ if (const ConstantInt *CI =
+ mdconst::dyn_extract<ConstantInt>(LocMD->getOperand(0))) {
+ LocCookie = CI->getZExtValue();
+ break;
+ }
+ }
+ }
+
+ // Emit the inline asm to a temporary string so we can emit it through
+ // EmitInlineAsm.
+ SmallString<256> StringData;
+ raw_svector_ostream OS(StringData);
+
+ // The variant of the current asmprinter.
+ int AsmPrinterVariant = MAI->getAssemblerDialect();
+ InlineAsm::AsmDialect InlineAsmVariant = MI->getInlineAsmDialect();
+ AsmPrinter *AP = const_cast<AsmPrinter*>(this);
+ if (InlineAsmVariant == InlineAsm::AD_ATT)
+ EmitGCCInlineAsmStr(AsmStr, MI, MMI, InlineAsmVariant, AsmPrinterVariant,
+ AP, LocCookie, OS);
+ else
+ EmitMSInlineAsmStr(AsmStr, MI, MMI, InlineAsmVariant, AP, LocCookie, OS);
+
+ // Reset SanitizeAddress based on the function's attribute.
+ MCTargetOptions MCOptions = TM.Options.MCOptions;
+ MCOptions.SanitizeAddress =
+ MF->getFunction()->hasFnAttribute(Attribute::SanitizeAddress);
+
+ EmitInlineAsm(OS.str(), getSubtargetInfo(), MCOptions, LocMD,
+ MI->getInlineAsmDialect());
// Emit the #NOAPP end marker. This has to happen even if verbose-asm isn't
- // enabled, so we use EmitRawText.
- if (OutStreamer.hasRawTextSupport())
- OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+
- MAI->getInlineAsmEnd());
+ // enabled, so we use emitRawComment.
+ OutStreamer->emitRawComment(MAI->getInlineAsmEnd());
}
void AsmPrinter::PrintSpecial(const MachineInstr *MI, raw_ostream &OS,
const char *Code) const {
if (!strcmp(Code, "private")) {
- OS << MAI->getPrivateGlobalPrefix();
+ const DataLayout &DL = MF->getDataLayout();
+ OS << DL.getPrivateGlobalPrefix();
} else if (!strcmp(Code, "comment")) {
OS << MAI->getCommentString();
} else if (!strcmp(Code, "uid")) {
return true;
O << -MO.getImm();
return false;
+ case 's': // The GCC deprecated s modifier
+ if (MO.getType() != MachineOperand::MO_Immediate)
+ return true;
+ O << ((32 - MO.getImm()) & 31);
+ return false;
}
}
return true;
return true;
}
+void AsmPrinter::emitInlineAsmStart() const {}
+
+void AsmPrinter::emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
+ const MCSubtargetInfo *EndInfo) const {}
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