-//===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
+//===-- AsmPrinterInlineAsm.cpp - AsmPrinter Inline Asm Handling ----------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
//
-// This file implements the AsmPrinter class.
+// This file implements the inline assembler pieces of the AsmPrinter class.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
-#include "llvm/InlineAsm.h"
#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/Constants.h"
+#include "llvm/InlineAsm.h"
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/Target/TargetAsmParser.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetRegistry.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/raw_ostream.h"
using namespace llvm;
/// EmitInlineAsm - Emit a blob of inline asm to the output streamer.
-void AsmPrinter::EmitInlineAsm(StringRef Str) const {
+void AsmPrinter::EmitInlineAsm(StringRef Str, unsigned LocCookie) 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 is actually a .s file, just emit the blob textually.
// This is useful in case the asm parser doesn't handle something but the
// system assembler does.
OutStreamer.EmitRawText(Str);
return;
}
-
- errs() << "Inline asm not supported by this streamer!\n";
+
+ SourceMgr SrcMgr;
+
+ // If the current LLVMContext has an inline asm handler, set it in SourceMgr.
+ LLVMContext &LLVMCtx = MMI->getModule()->getContext();
+ bool HasDiagHandler = false;
+ if (void *DiagHandler = LLVMCtx.getInlineAsmDiagnosticHandler()) {
+ SrcMgr.setDiagHandler((SourceMgr::DiagHandlerTy)(intptr_t)DiagHandler,
+ LLVMCtx.getInlineAsmDiagnosticContext(), LocCookie);
+ HasDiagHandler = true;
+ }
+
+ 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(TM.getTarget(), SrcMgr,
+ OutContext, OutStreamer,
+ *MAI));
+ OwningPtr<TargetAsmParser> TAP(TM.getTarget().createAsmParser(*Parser, TM));
+ 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->setTargetParser(*TAP.get());
+
+ // Don't implicitly switch to the text section before the asm.
+ int Res = Parser->Run(/*NoInitialTextSection*/ true,
+ /*NoFinalize*/ true);
+ if (Res && !HasDiagHandler)
+ report_fatal_error("Error parsing inline asm\n");
}
/// instruction that is an inline asm.
void AsmPrinter::EmitInlineAsm(const MachineInstr *MI) const {
assert(MI->isInlineAsm() && "printInlineAsm only works on inline asms");
-
+
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-1 && "No asm string?");
-
+ assert(NumDefs != NumOperands-2 && "No asm string?");
+
assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
// Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
// 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;
OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+
OutStreamer.EmitRawText(Twine("\t")+MAI->getCommentString()+
MAI->getInlineAsmStart());
+ // Get the !srcloc metadata node if we have it, and decode the loc cookie from
+ // it.
+ unsigned LocCookie = 0;
+ for (unsigned i = MI->getNumOperands(); i != 0; --i) {
+ if (MI->getOperand(i-1).isMetadata())
+ if (const MDNode *SrcLoc = MI->getOperand(i-1).getMetadata())
+ if (SrcLoc->getNumOperands() != 0)
+ if (const ConstantInt *CI =
+ dyn_cast<ConstantInt>(SrcLoc->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);
-
+
OS << '\t';
// The variant of the current asmprinter.
int CurVariant = -1; // The number of the {.|.|.} region we are in.
const char *LastEmitted = AsmStr; // One past the last character emitted.
-
+
while (*LastEmitted) {
switch (*LastEmitted) {
default: {
}
case '\n':
++LastEmitted; // Consume newline character.
- OS << '\n'; // Indent code with newline.
+ OS << '\n'; // Indent code with newline.
break;
case '$': {
++LastEmitted; // Consume '$' character.
break;
case '(': // $( -> same as GCC's { character.
++LastEmitted; // Consume '(' character.
- if (CurVariant != -1) {
- llvm_report_error("Nested variants found in inline asm string: '"
- + std::string(AsmStr) + "'");
- }
+ 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
+ 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.
const char *StrStart = LastEmitted;
const char *StrEnd = strchr(StrStart, '}');
if (StrEnd == 0)
- llvm_report_error(Twine("Unterminated ${:foo} operand in inline asm"
- " string: '") + Twine(AsmStr) + "'");
-
+ report_fatal_error("Unterminated ${:foo} operand in inline asm"
+ " string: '" + Twine(AsmStr) + "'");
+
std::string Val(StrStart, StrEnd);
PrintSpecial(MI, OS, Val.c_str());
LastEmitted = StrEnd+1;
break;
}
-
+
const char *IDStart = LastEmitted;
const char *IDEnd = IDStart;
- while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
-
+ while (*IDEnd >= '0' && *IDEnd <= '9') ++IDEnd;
+
unsigned Val;
if (StringRef(IDStart, IDEnd-IDStart).getAsInteger(10, Val))
- llvm_report_error("Bad $ operand number in inline asm string: '"
- + std::string(AsmStr) + "'");
+ 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) {
- llvm_report_error("Bad ${:} expression in inline asm string: '"
- + std::string(AsmStr) + "'");
- }
-
+ if (*LastEmitted == 0)
+ report_fatal_error("Bad ${:} expression in inline asm string: '" +
+ Twine(AsmStr) + "'");
+
Modifier[0] = *LastEmitted;
++LastEmitted; // Consume modifier character.
}
-
- if (*LastEmitted != '}') {
- llvm_report_error("Bad ${} expression in inline asm string: '"
- + std::string(AsmStr) + "'");
- }
+
+ if (*LastEmitted != '}')
+ report_fatal_error("Bad ${} expression in inline asm string: '" +
+ Twine(AsmStr) + "'");
++LastEmitted; // Consume '}' character.
}
-
- if (Val >= NumOperands-1) {
- llvm_report_error("Invalid $ operand number in inline asm string: '"
- + std::string(AsmStr) + "'");
- }
-
+
+ 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 = 1;
+ unsigned OpNo = 2;
bool Error = false;
OS << *MI->getOperand(OpNo).getMBB()->getSymbol();
else {
AsmPrinter *AP = const_cast<AsmPrinter*>(this);
- if ((OpFlags & 7) == 4) {
+ if (InlineAsm::isMemKind(OpFlags)) {
Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
Modifier[0] ? Modifier : 0,
OS);
if (Error) {
std::string msg;
raw_string_ostream Msg(msg);
- Msg << "Invalid operand found in inline asm: '" << AsmStr << "'\n";
- MI->print(Msg);
- llvm_report_error(Msg.str());
+ Msg << "invalid operand in inline asm: '" << AsmStr << "'";
+ MMI->getModule()->getContext().emitError(LocCookie, Msg.str());
}
}
break;
}
}
}
- OS << "\n";
-
- EmitInlineAsm(OS.str());
-
+ OS << '\n' << (char)0; // null terminate string.
+ EmitInlineAsm(OS.str(), LocCookie);
+
// Emit the #NOAPP end marker. This has to happen even if verbose-asm isn't
// enabled, so we use EmitRawText.
if (OutStreamer.hasRawTextSupport())
} 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;
raw_string_ostream Msg(msg);
Msg << "Unknown special formatter '" << Code
<< "' for machine instr: " << *MI;
- llvm_report_error(Msg.str());
- }
+ report_fatal_error(Msg.str());
+ }
}
/// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
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