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Add diagnostic help for inline asm operand constraint 'H' #86910

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d115282
add clear diagnostic message for inline asm H constraint on operand
mahesh-attarde Mar 26, 2024
d4c1306
undo line break
mahesh-attarde Mar 28, 2024
5faa6a3
redo clang-format with lorg settings
mahesh-attarde Mar 28, 2024
e45f442
Update llvm/test/CodeGen/X86/inline-asm-modifier-error.ll
mahesh-attarde Mar 28, 2024
a591851
Update llvm/test/CodeGen/X86/inline-asm-modifier-error.ll
mahesh-attarde Mar 28, 2024
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6 changes: 4 additions & 2 deletions llvm/include/llvm/CodeGen/AsmPrinter.h
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Expand Up @@ -816,9 +816,11 @@ class AsmPrinter : public MachineFunctionPass {

/// Print the specified operand of MI, an INLINEASM instruction, using the
/// specified assembler variant. Targets should override this to format as
/// appropriate. This method can return true if the operand is erroneous.
/// appropriate. This method can return true if the operand is erroneous,
/// method can provide helpful diagnostic message in some case.
virtual bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS);
const char *ExtraCode, raw_ostream &OS,
std::string &ErrorMsg);

/// Print the specified operand of MI, an INLINEASM instruction, using the
/// specified assembler variant as an address. Targets should override this to
Expand Down
11 changes: 7 additions & 4 deletions llvm/lib/CodeGen/AsmPrinter/AsmPrinterInlineAsm.cpp
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Expand Up @@ -285,6 +285,7 @@ static void EmitInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
// 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.
std::string ErrorMsg;
if (OpNo >= MI->getNumOperands() || MI->getOperand(OpNo).isMetadata()) {
Error = true;
} else {
Expand All @@ -306,14 +307,15 @@ static void EmitInlineAsmStr(const char *AsmStr, const MachineInstr *MI,
Error = AP->PrintAsmMemoryOperand(
MI, OpNo, Modifier[0] ? Modifier : nullptr, OS);
} else {
Error = AP->PrintAsmOperand(MI, OpNo,
Modifier[0] ? Modifier : nullptr, OS);
Error = AP->PrintAsmOperand(
MI, OpNo, Modifier[0] ? Modifier : nullptr, OS, ErrorMsg);
}
}
if (Error) {
std::string msg;
raw_string_ostream Msg(msg);
Msg << "invalid operand in inline asm: '" << AsmStr << "'";
Msg << "invalid operand in inline asm: '" << AsmStr << "'"
<< ErrorMsg;
MMI->getModule()->getContext().emitError(LocCookie, Msg.str());
}
}
Expand Down Expand Up @@ -466,7 +468,8 @@ void AsmPrinter::PrintSymbolOperand(const MachineOperand &MO, raw_ostream &OS) {
/// 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) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true; // Unknown modifier.
Expand Down
8 changes: 5 additions & 3 deletions llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
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Expand Up @@ -177,7 +177,8 @@ class AArch64AsmPrinter : public AsmPrinter {
raw_ostream &O);

bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;

Expand Down Expand Up @@ -910,11 +911,12 @@ bool AArch64AsmPrinter::printAsmRegInClass(const MachineOperand &MO,
}

bool AArch64AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
const MachineOperand &MO = MI->getOperand(OpNum);

// First try the generic code, which knows about modifiers like 'c' and 'n'.
if (!AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O))
if (!AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O, ErrorMsg))
return false;

// Does this asm operand have a single letter operand modifier?
Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
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Expand Up @@ -1235,9 +1235,10 @@ void AMDGPUAsmPrinter::getAmdKernelCode(amd_kernel_code_t &Out,
}

bool AMDGPUAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// First try the generic code, which knows about modifiers like 'c' and 'n'.
if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O))
if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O, ErrorMsg))
return false;

if (ExtraCode && ExtraCode[0]) {
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.h
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Expand Up @@ -129,7 +129,8 @@ class AMDGPUAsmPrinter final : public AsmPrinter {
void emitEndOfAsmFile(Module &M) override;

bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;

protected:
void getAnalysisUsage(AnalysisUsage &AU) const override;
Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/ARM/ARMAsmPrinter.cpp
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Expand Up @@ -284,15 +284,16 @@ GetARMJTIPICJumpTableLabel(unsigned uid) const {
}

bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true; // Unknown modifier.

switch (ExtraCode[0]) {
default:
// See if this is a generic print operand
return AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O);
return AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O, ErrorMsg);
case 'P': // Print a VFP double precision register.
case 'q': // Print a NEON quad precision register.
printOperand(MI, OpNum, O);
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/ARM/ARMAsmPrinter.h
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Expand Up @@ -77,7 +77,8 @@ class LLVM_LIBRARY_VISIBILITY ARMAsmPrinter : public AsmPrinter {

void PrintSymbolOperand(const MachineOperand &MO, raw_ostream &O) override;
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;

Expand Down
8 changes: 5 additions & 3 deletions llvm/lib/Target/AVR/AVRAsmPrinter.cpp
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Expand Up @@ -52,7 +52,8 @@ class AVRAsmPrinter : public AsmPrinter {
void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);

bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;

bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;
Expand Down Expand Up @@ -98,10 +99,11 @@ void AVRAsmPrinter::printOperand(const MachineInstr *MI, unsigned OpNo,
}

bool AVRAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// Default asm printer can only deal with some extra codes,
// so try it first.
if (!AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O))
if (!AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O, ErrorMsg))
return false;

const MachineOperand &MO = MI->getOperand(OpNum);
Expand Down
8 changes: 5 additions & 3 deletions llvm/lib/Target/BPF/BPFAsmPrinter.cpp
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Expand Up @@ -44,7 +44,8 @@ class BPFAsmPrinter : public AsmPrinter {
bool doInitialization(Module &M) override;
void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;

Expand Down Expand Up @@ -108,9 +109,10 @@ void BPFAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
}

bool BPFAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
if (ExtraCode && ExtraCode[0])
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O, ErrorMsg);

printOperand(MI, OpNo, O);
return false;
Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/CSKY/CSKYAsmPrinter.cpp
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Expand Up @@ -261,9 +261,10 @@ void CSKYAsmPrinter::emitAttributes() {
}

bool CSKYAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS) {
const char *ExtraCode, raw_ostream &OS,
std::string &ErrorMsg) {
// First try the generic code, which knows about modifiers like 'c' and 'n'.
if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS))
if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS, ErrorMsg))
return false;

const MachineOperand &MO = MI->getOperand(OpNo);
Expand Down
6 changes: 3 additions & 3 deletions llvm/lib/Target/Hexagon/HexagonAsmPrinter.cpp
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Expand Up @@ -113,8 +113,8 @@ bool HexagonAsmPrinter::isBlockOnlyReachableByFallthrough(

/// PrintAsmOperand - Print out an operand for an inline asm expression.
bool HexagonAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode,
raw_ostream &OS) {
const char *ExtraCode, raw_ostream &OS,
std::string &ErrorMsg) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0)
Expand All @@ -123,7 +123,7 @@ bool HexagonAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
switch (ExtraCode[0]) {
default:
// See if this is a generic print operand
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS);
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS, ErrorMsg);
case 'L':
case 'H': { // The highest-numbered register of a pair.
const MachineOperand &MO = MI->getOperand(OpNo);
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/Hexagon/HexagonAsmPrinter.h
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Expand Up @@ -67,7 +67,8 @@ class TargetMachine;

void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS) override;
const char *ExtraCode, raw_ostream &OS,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS) override;
void emitStartOfAsmFile(Module &M) override;
Expand Down
8 changes: 5 additions & 3 deletions llvm/lib/Target/Lanai/LanaiAsmPrinter.cpp
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Expand Up @@ -50,7 +50,8 @@ class LanaiAsmPrinter : public AsmPrinter {

void printOperand(const MachineInstr *MI, int OpNum, raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;
void emitInstruction(const MachineInstr *MI) override;
bool isBlockOnlyReachableByFallthrough(
const MachineBasicBlock *MBB) const override;
Expand Down Expand Up @@ -109,7 +110,8 @@ void LanaiAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,

// PrintAsmOperand - Print out an operand for an inline asm expression.
bool LanaiAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1])
Expand Down Expand Up @@ -138,7 +140,7 @@ bool LanaiAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
return false;
}
default:
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O, ErrorMsg);
}
}
printOperand(MI, OpNo, O);
Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/LoongArch/LoongArchAsmPrinter.cpp
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Expand Up @@ -56,9 +56,10 @@ void LoongArchAsmPrinter::emitInstruction(const MachineInstr *MI) {

bool LoongArchAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode,
raw_ostream &OS) {
raw_ostream &OS,
std::string &ErrorMsg) {
// First try the generic code, which knows about modifiers like 'c' and 'n'.
if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS))
if (!AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS, ErrorMsg))
return false;

const MachineOperand &MO = MI->getOperand(OpNo);
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/LoongArch/LoongArchAsmPrinter.h
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Expand Up @@ -37,7 +37,8 @@ class LLVM_LIBRARY_VISIBILITY LoongArchAsmPrinter : public AsmPrinter {
void emitInstruction(const MachineInstr *MI) override;

bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS) override;
const char *ExtraCode, raw_ostream &OS,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS) override;

Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/M68k/M68kAsmPrinter.cpp
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Expand Up @@ -65,15 +65,16 @@ void M68kAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
}

bool M68kAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &OS) {
const char *ExtraCode, raw_ostream &OS,
std::string &ErrorMsg) {
// Print the operand if there is no operand modifier.
if (!ExtraCode || !ExtraCode[0]) {
printOperand(MI, OpNo, OS);
return false;
}

// Fallback to the default implementation.
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS);
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, OS, ErrorMsg);
}

void M68kAsmPrinter::printDisp(const MachineInstr *MI, unsigned opNum,
Expand Down
8 changes: 5 additions & 3 deletions llvm/lib/Target/MSP430/MSP430AsmPrinter.cpp
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Expand Up @@ -54,7 +54,8 @@ namespace {
void printSrcMemOperand(const MachineInstr *MI, int OpNum,
raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) override;
void emitInstruction(const MachineInstr *MI) override;
Expand Down Expand Up @@ -127,10 +128,11 @@ void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool MSP430AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0])
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O, ErrorMsg);

printOperand(MI, OpNo, O);
return false;
Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/Mips/MipsAsmPrinter.cpp
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Expand Up @@ -473,7 +473,8 @@ void MipsAsmPrinter::emitBasicBlockEnd(const MachineBasicBlock &MBB) {

// Print out an operand for an inline asm expression.
bool MipsAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true; // Unknown modifier.
Expand All @@ -482,7 +483,7 @@ bool MipsAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNum,
switch (ExtraCode[0]) {
default:
// See if this is a generic print operand
return AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O);
return AsmPrinter::PrintAsmOperand(MI, OpNum, ExtraCode, O, ErrorMsg);
case 'X': // hex const int
if (!MO.isImm())
return true;
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/Mips/MipsAsmPrinter.h
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Expand Up @@ -143,7 +143,8 @@ class LLVM_LIBRARY_VISIBILITY MipsAsmPrinter : public AsmPrinter {
void emitFunctionBodyEnd() override;
void emitBasicBlockEnd(const MachineBasicBlock &MBB) override;
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) override;
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) override;
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNum,
const char *ExtraCode, raw_ostream &O) override;
void printOperand(const MachineInstr *MI, int opNum, raw_ostream &O);
Expand Down
5 changes: 3 additions & 2 deletions llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp
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Expand Up @@ -2169,15 +2169,16 @@ void NVPTXAsmPrinter::printMCExpr(const MCExpr &Expr, raw_ostream &OS) {
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool NVPTXAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &O) {
const char *ExtraCode, raw_ostream &O,
std::string &ErrorMsg) {
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0)
return true; // Unknown modifier.

switch (ExtraCode[0]) {
default:
// See if this is a generic print operand
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O);
return AsmPrinter::PrintAsmOperand(MI, OpNo, ExtraCode, O, ErrorMsg);
case 'r':
break;
}
Expand Down
3 changes: 2 additions & 1 deletion llvm/lib/Target/NVPTX/NVPTXAsmPrinter.h
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Expand Up @@ -184,7 +184,8 @@ class LLVM_LIBRARY_VISIBILITY NVPTXAsmPrinter : public AsmPrinter {
void printReturnValStr(const Function *, raw_ostream &O);
void printReturnValStr(const MachineFunction &MF, raw_ostream &O);
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &) override;
const char *ExtraCode, raw_ostream &,
std::string &ErrorMsg) override;
void printOperand(const MachineInstr *MI, unsigned OpNum, raw_ostream &O);
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
const char *ExtraCode, raw_ostream &) override;
Expand Down
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