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diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
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index 000000000000..420df26a2b8b
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+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
@@ -0,0 +1,664 @@
+//===-- AsmPrinterInlineAsm.cpp - AsmPrinter Inline Asm Handling ----------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the inline assembler pieces of the AsmPrinter class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/TargetInstrInfo.h"
+#include "llvm/CodeGen/TargetRegisterInfo.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/MCParser/MCTargetAsmParser.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.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/TargetMachine.h"
+using namespace llvm;
+
+#define DEBUG_TYPE "asm-printer"
+
+/// srcMgrDiagHandler - This callback is invoked when the SourceMgr for an
+/// inline asm has an error in it. diagInfo is a pointer to the SrcMgrDiagInfo
+/// struct above.
+static void srcMgrDiagHandler(const SMDiagnostic &Diag, void *diagInfo) {
+ AsmPrinter::SrcMgrDiagInfo *DiagInfo =
+ static_cast<AsmPrinter::SrcMgrDiagInfo *>(diagInfo);
+ assert(DiagInfo && "Diagnostic context not passed down?");
+
+ // Look up a LocInfo for the buffer this diagnostic is coming from.
+ unsigned BufNum = DiagInfo->SrcMgr.FindBufferContainingLoc(Diag.getLoc());
+ const MDNode *LocInfo = nullptr;
+ if (BufNum > 0 && BufNum <= DiagInfo->LocInfos.size())
+ LocInfo = DiagInfo->LocInfos[BufNum-1];
+
+ // If the inline asm had metadata associated with it, pull out a location
+ // cookie corresponding to which line the error occurred on.
+ unsigned LocCookie = 0;
+ if (LocInfo) {
+ unsigned ErrorLine = Diag.getLineNo()-1;
+ if (ErrorLine >= LocInfo->getNumOperands())
+ ErrorLine = 0;
+
+ if (LocInfo->getNumOperands() != 0)
+ if (const ConstantInt *CI =
+ mdconst::dyn_extract<ConstantInt>(LocInfo->getOperand(ErrorLine)))
+ LocCookie = CI->getZExtValue();
+ }
+
+ DiagInfo->DiagHandler(Diag, DiagInfo->DiagContext, LocCookie);
+}
+
+unsigned AsmPrinter::addInlineAsmDiagBuffer(StringRef AsmStr,
+ const MDNode *LocMDNode) const {
+ if (!DiagInfo) {
+ DiagInfo = std::make_unique<SrcMgrDiagInfo>();
+
+ MCContext &Context = MMI->getContext();
+ Context.setInlineSourceManager(&DiagInfo->SrcMgr);
+
+ LLVMContext &LLVMCtx = MMI->getModule()->getContext();
+ if (LLVMCtx.getInlineAsmDiagnosticHandler()) {
+ DiagInfo->DiagHandler = LLVMCtx.getInlineAsmDiagnosticHandler();
+ DiagInfo->DiagContext = LLVMCtx.getInlineAsmDiagnosticContext();
+ DiagInfo->SrcMgr.setDiagHandler(srcMgrDiagHandler, DiagInfo.get());
+ }
+ }
+
+ SourceMgr &SrcMgr = DiagInfo->SrcMgr;
+
+ std::unique_ptr<MemoryBuffer> Buffer;
+ // The inline asm source manager will outlive AsmStr, so make a copy of the
+ // string for SourceMgr to own.
+ Buffer = MemoryBuffer::getMemBufferCopy(AsmStr, "<inline asm>");
+
+ // Tell SrcMgr about this buffer, it takes ownership of the buffer.
+ unsigned BufNum = SrcMgr.AddNewSourceBuffer(std::move(Buffer), SMLoc());
+
+ // Store LocMDNode in DiagInfo, using BufNum as an identifier.
+ if (LocMDNode) {
+ DiagInfo->LocInfos.resize(BufNum);
+ DiagInfo->LocInfos[BufNum - 1] = LocMDNode;
+ }
+
+ return BufNum;
+}
+
+
+/// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
+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");
+
+ // Remember if the buffer is nul terminated or not so we can avoid a copy.
+ bool isNullTerminated = Str.back() == 0;
+ if (isNullTerminated)
+ Str = Str.substr(0, Str.size()-1);
+
+ // 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.
+ const MCAsmInfo *MCAI = TM.getMCAsmInfo();
+ assert(MCAI && "No MCAsmInfo");
+ if (!MCAI->useIntegratedAssembler() &&
+ !OutStreamer->isIntegratedAssemblerRequired()) {
+ emitInlineAsmStart();
+ OutStreamer->EmitRawText(Str);
+ emitInlineAsmEnd(STI, nullptr);
+ return;
+ }
+
+ unsigned BufNum = addInlineAsmDiagBuffer(Str, LocMDNode);
+ DiagInfo->SrcMgr.setIncludeDirs(MCOptions.IASSearchPaths);
+
+ std::unique_ptr<MCAsmParser> Parser(createMCAsmParser(
+ DiagInfo->SrcMgr, OutContext, *OutStreamer, *MAI, BufNum));
+
+ // Do not use assembler-level information for parsing inline assembly.
+ OutStreamer->setUseAssemblerInfoForParsing(false);
+
+ // 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());
+ // Enable lexing Masm binary and hex integer literals in intel inline
+ // assembly.
+ if (Dialect == InlineAsm::AD_Intel)
+ Parser->getLexer().setLexMasmIntegers(true);
+
+ 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 && !DiagInfo->DiagHandler)
+ report_fatal_error("Error parsing inline asm\n");
+}
+
+static void EmitMSInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
+ MachineModuleInfo *MMI, AsmPrinter *AP,
+ unsigned LocCookie, raw_ostream &OS) {
+ // Switch to the inline assembly variant.
+ OS << "\t.intel_syntax\n\t";
+
+ const char *LastEmitted = AsmStr; // One past the last character emitted.
+ unsigned NumOperands = MI->getNumOperands();
+
+ 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 != '$' && *LiteralEnd != '\n')
+ ++LiteralEnd;
+
+ OS.write(LastEmitted, LiteralEnd-LastEmitted);
+ LastEmitted = LiteralEnd;
+ break;
+ }
+ case '\n':
+ ++LastEmitted; // Consume newline character.
+ OS << '\n'; // Indent code with newline.
+ break;
+ case '$': {
+ ++LastEmitted; // Consume '$' character.
+ bool Done = true;
+
+ // Handle escapes.
+ switch (*LastEmitted) {
+ default: Done = false; break;
+ case '$':
+ ++LastEmitted; // Consume second '$' character.
+ break;
+ }
+ if (Done) break;
+
+ // If we have ${:foo}, then this is not a real operand reference, it is a
+ // "magic" string reference, just like in .td files. Arrange to call
+ // PrintSpecial.
+ if (LastEmitted[0] == '{' && LastEmitted[1] == ':') {
+ LastEmitted += 2;
+ const char *StrStart = LastEmitted;
+ const char *StrEnd = strchr(StrStart, '}');
+ if (!StrEnd)
+ report_fatal_error("Unterminated ${:foo} operand in inline asm"
+ " string: '" + Twine(AsmStr) + "'");
+
+ std::string Val(StrStart, StrEnd);
+ AP->PrintSpecial(MI, OS, Val.c_str());
+ LastEmitted = StrEnd+1;
+ break;
+ }
+
+ const char *IDStart = LastEmitted;
+ const char *IDEnd = IDStart;
+ while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
+
+ unsigned Val;
+ if (StringRef(IDStart, IDEnd-IDStart).getAsInteger(10, Val))
+ report_fatal_error("Bad $ operand number in inline asm string: '" +
+ Twine(AsmStr) + "'");
+ LastEmitted = IDEnd;
+
+ if (Val >= NumOperands-1)
+ report_fatal_error("Invalid $ operand number in inline asm string: '" +
+ Twine(AsmStr) + "'");
+
+ // Okay, we finally have a value number. Ask the target to print this
+ // operand!
+ unsigned OpNo = InlineAsm::MIOp_FirstOperand;
+
+ bool Error = false;
+
+ // 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;
+ }
+
+ // 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, /*Modifier*/ nullptr, OS);
+ } else {
+ Error = AP->PrintAsmOperand(MI, OpNo, /*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 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) {
+ default: {
+ // Not a special case, emit the string section literally.
+ const char *LiteralEnd = LastEmitted+1;
+ while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
+ *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
+ ++LiteralEnd;
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
+ OS.write(LastEmitted, LiteralEnd-LastEmitted);
+ LastEmitted = LiteralEnd;
+ break;
+ }
+ case '\n':
+ ++LastEmitted; // Consume newline character.
+ OS << '\n'; // Indent code with newline.
+ break;
+ case '$': {
+ ++LastEmitted; // Consume '$' character.
+ bool Done = true;
+
+ // Handle escapes.
+ switch (*LastEmitted) {
+ default: Done = false; break;
+ case '$': // $$ -> $
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
+ OS << '$';
+ ++LastEmitted; // Consume second '$' character.
+ break;
+ case '(': // $( -> same as GCC's { character.
+ ++LastEmitted; // Consume '(' character.
+ if (CurVariant != -1)
+ report_fatal_error("Nested variants found in inline asm string: '" +
+ Twine(AsmStr) + "'");
+ CurVariant = 0; // We're in the first variant now.
+ break;
+ case '|':
+ ++LastEmitted; // consume '|' character.
+ if (CurVariant == -1)
+ OS << '|'; // this is gcc's behavior for | outside a variant
+ else
+ ++CurVariant; // We're in the next variant.
+ break;
+ case ')': // $) -> same as GCC's } char.
+ ++LastEmitted; // consume ')' character.
+ if (CurVariant == -1)
+ OS << '}'; // this is gcc's behavior for } outside a variant
+ else
+ CurVariant = -1;
+ break;
+ }
+ if (Done) break;
+
+ bool HasCurlyBraces = false;
+ if (*LastEmitted == '{') { // ${variable}
+ ++LastEmitted; // Consume '{' character.
+ HasCurlyBraces = true;
+ }
+
+ // If we have ${:foo}, then this is not a real operand reference, it is a
+ // "magic" string reference, just like in .td files. Arrange to call
+ // PrintSpecial.
+ if (HasCurlyBraces && *LastEmitted == ':') {
+ ++LastEmitted;
+ const char *StrStart = LastEmitted;
+ const char *StrEnd = strchr(StrStart, '}');
+ if (!StrEnd)
+ report_fatal_error("Unterminated ${:foo} operand in inline asm"
+ " string: '" + Twine(AsmStr) + "'");
+
+ std::string Val(StrStart, StrEnd);
+ AP->PrintSpecial(MI, OS, Val.c_str());
+ LastEmitted = StrEnd+1;
+ break;
+ }
+
+ const char *IDStart = LastEmitted;
+ const char *IDEnd = IDStart;
+ while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
+
+ unsigned Val;
+ if (StringRef(IDStart, IDEnd-IDStart).getAsInteger(10, Val))
+ report_fatal_error("Bad $ operand number in inline asm string: '" +
+ Twine(AsmStr) + "'");
+ LastEmitted = IDEnd;
+
+ char Modifier[2] = { 0, 0 };
+
+ if (HasCurlyBraces) {
+ // If we have curly braces, check for a modifier character. This
+ // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
+ if (*LastEmitted == ':') {
+ ++LastEmitted; // Consume ':' character.
+ if (*LastEmitted == 0)
+ report_fatal_error("Bad ${:} expression in inline asm string: '" +
+ Twine(AsmStr) + "'");
+
+ Modifier[0] = *LastEmitted;
+ ++LastEmitted; // Consume modifier character.
+ }
+
+ if (*LastEmitted != '}')
+ report_fatal_error("Bad ${} expression in inline asm string: '" +
+ Twine(AsmStr) + "'");
+ ++LastEmitted; // Consume '}' character.
+ }
+
+ if (Val >= NumOperands-1)
+ report_fatal_error("Invalid $ operand number in inline asm string: '" +
+ Twine(AsmStr) + "'");
+
+ // Okay, we finally have a value number. Ask the target to print this
+ // operand!
+ if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
+ unsigned OpNo = InlineAsm::MIOp_FirstOperand;
+
+ bool Error = false;
+
+ // 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;
+ }
+
+ // 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.
+
+ // FIXME: Shouldn't arch-independent output template handling go into
+ // PrintAsmOperand?
+ if (Modifier[0] == 'l') { // Labels are target independent.
+ if (MI->getOperand(OpNo).isBlockAddress()) {
+ const BlockAddress *BA = MI->getOperand(OpNo).getBlockAddress();
+ MCSymbol *Sym = AP->GetBlockAddressSymbol(BA);
+ Sym->print(OS, AP->MAI);
+ MMI->getContext().registerInlineAsmLabel(Sym);
+ } else if (MI->getOperand(OpNo).isMBB()) {
+ const MCSymbol *Sym = MI->getOperand(OpNo).getMBB()->getSymbol();
+ Sym->print(OS, AP->MAI);
+ } else {
+ Error = true;
+ }
+ } else {
+ if (InlineAsm::isMemKind(OpFlags)) {
+ Error = AP->PrintAsmMemoryOperand(
+ MI, OpNo, Modifier[0] ? Modifier : nullptr, OS);
+ } else {
+ Error = AP->PrintAsmOperand(MI, OpNo,
+ Modifier[0] ? 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' << (char)0; // null terminate string.
+}
+
+/// 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();
+ AsmPrinter *AP = const_cast<AsmPrinter*>(this);
+ if (MI->getInlineAsmDialect() == InlineAsm::AD_ATT)
+ EmitGCCInlineAsmStr(AsmStr, MI, MMI, AsmPrinterVariant, AP, LocCookie, OS);
+ else
+ EmitMSInlineAsmStr(AsmStr, MI, MMI, AP, LocCookie, OS);
+
+ // Emit warnings if we use reserved registers on the clobber list, as
+ // that might give surprising results.
+ std::vector<std::string> RestrRegs;
+ // Start with the first operand descriptor, and iterate over them.
+ for (unsigned I = InlineAsm::MIOp_FirstOperand, NumOps = MI->getNumOperands();
+ I < NumOps; ++I) {
+ const MachineOperand &MO = MI->getOperand(I);
+ if (MO.isImm()) {
+ unsigned Flags = MO.getImm();
+ const TargetRegisterInfo *TRI = MF->getSubtarget().getRegisterInfo();
+ if (InlineAsm::getKind(Flags) == InlineAsm::Kind_Clobber &&
+ !TRI->isAsmClobberable(*MF, MI->getOperand(I + 1).getReg())) {
+ RestrRegs.push_back(TRI->getName(MI->getOperand(I + 1).getReg()));
+ }
+ // Skip to one before the next operand descriptor, if it exists.
+ I += InlineAsm::getNumOperandRegisters(Flags);
+ }
+ }
+
+ if (!RestrRegs.empty()) {
+ unsigned BufNum = addInlineAsmDiagBuffer(OS.str(), LocMD);
+ auto &SrcMgr = DiagInfo->SrcMgr;
+ SMLoc Loc = SMLoc::getFromPointer(
+ SrcMgr.getMemoryBuffer(BufNum)->getBuffer().begin());
+
+ std::string Msg = "inline asm clobber list contains reserved registers: ";
+ for (auto I = RestrRegs.begin(), E = RestrRegs.end(); I != E; I++) {
+ if(I != RestrRegs.begin())
+ Msg += ", ";
+ Msg += *I;
+ }
+ std::string Note = "Reserved registers on the clobber list may not be "
+ "preserved across the asm statement, and clobbering them may "
+ "lead to undefined behaviour.";
+ SrcMgr.PrintMessage(Loc, SourceMgr::DK_Warning, Msg);
+ SrcMgr.PrintMessage(Loc, SourceMgr::DK_Note, Note);
+ }
+
+ EmitInlineAsm(OS.str(), getSubtargetInfo(), TM.Options.MCOptions, LocMD,
+ MI->getInlineAsmDialect());
+
+ // Emit the #NOAPP end marker. This has to happen even if verbose-asm isn't
+ // enabled, so we use emitRawComment.
+ OutStreamer->emitRawComment(MAI->getInlineAsmEnd());
+}
+
+
+/// PrintSpecial - Print information related to the specified machine instr
+/// that is independent of the operand, and may be independent of the instr
+/// itself. This can be useful for portably encoding the comment character
+/// or other bits of target-specific knowledge into the asmstrings. The
+/// syntax used is ${:comment}. Targets can override this to add support
+/// for their own strange codes.
+void AsmPrinter::PrintSpecial(const MachineInstr *MI, raw_ostream &OS,
+ const char *Code) const {
+ if (!strcmp(Code, "private")) {
+ const DataLayout &DL = MF->getDataLayout();
+ OS << DL.getPrivateGlobalPrefix();
+ } else if (!strcmp(Code, "comment")) {
+ OS << MAI->getCommentString();
+ } else if (!strcmp(Code, "uid")) {
+ // Comparing the address of MI isn't sufficient, because machineinstrs may
+ // be allocated to the same address across functions.
+
+ // If this is a new LastFn instruction, bump the counter.
+ if (LastMI != MI || LastFn != getFunctionNumber()) {
+ ++Counter;
+ LastMI = MI;
+ LastFn = getFunctionNumber();
+ }
+ OS << Counter;
+ } else {
+ std::string msg;
+ raw_string_ostream Msg(msg);
+ Msg << "Unknown special formatter '" << Code
+ << "' for machine instr: " << *MI;
+ report_fatal_error(Msg.str());
+ }
+}
+
+void AsmPrinter::PrintSymbolOperand(const MachineOperand &MO, raw_ostream &OS) {
+ assert(MO.isGlobal() && "caller should check MO.isGlobal");
+ getSymbol(MO.getGlobal())->print(OS, MAI);
+ printOffset(MO.getOffset(), OS);
+}
+
+/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
+/// instruction, using the specified assembler variant. Targets should
+/// override this to format as appropriate for machine specific ExtraCodes
+/// or when the arch-independent handling would be too complex otherwise.
+bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
+ const char *ExtraCode, raw_ostream &O) {
+ // Does this asm operand have a single letter operand modifier?
+ if (ExtraCode && ExtraCode[0]) {
+ if (ExtraCode[1] != 0) return true; // Unknown modifier.
+
+ // https://gcc.gnu.org/onlinedocs/gccint/Output-Template.html
+ const MachineOperand &MO = MI->getOperand(OpNo);
+ switch (ExtraCode[0]) {
+ default:
+ return true; // Unknown modifier.
+ case 'a': // Print as memory address.
+ if (MO.isReg()) {
+ PrintAsmMemoryOperand(MI, OpNo, nullptr, O);
+ return false;
+ }
+ LLVM_FALLTHROUGH; // GCC allows '%a' to behave like '%c' with immediates.
+ case 'c': // Substitute immediate value without immediate syntax
+ if (MO.isImm()) {
+ O << MO.getImm();
+ return false;
+ }
+ if (MO.isGlobal()) {
+ PrintSymbolOperand(MO, O);
+ return false;
+ }
+ return true;
+ case 'n': // Negate the immediate constant.
+ if (!MO.isImm())
+ return true;
+ O << -MO.getImm();
+ return false;
+ case 's': // The GCC deprecated s modifier
+ if (!MO.isImm())
+ return true;
+ O << ((32 - MO.getImm()) & 31);
+ return false;
+ }
+ }
+ return true;
+}
+
+bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
+ const char *ExtraCode, raw_ostream &O) {
+ // Target doesn't support this yet!
+ return true;
+}
+
+void AsmPrinter::emitInlineAsmStart() const {}
+
+void AsmPrinter::emitInlineAsmEnd(const MCSubtargetInfo &StartInfo,
+ const MCSubtargetInfo *EndInfo) const {}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 03:42:49 +0000