-//===- X86.td - Target definition file for the Intel X86 ---*- tablegen -*-===//
+//===-- X86.td - Target definition file for the Intel X86 --*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
include "llvm/Target/Target.td"
//===----------------------------------------------------------------------===//
-// X86 Subtarget state.
+// X86 Subtarget state
//
def Mode64Bit : SubtargetFeature<"64bit-mode", "In64BitMode", "true",
"64-bit mode (x86_64)">;
+def Mode32Bit : SubtargetFeature<"32bit-mode", "In32BitMode", "true",
+ "32-bit mode (80386)">;
+def Mode16Bit : SubtargetFeature<"16bit-mode", "In16BitMode", "true",
+ "16-bit mode (i8086)">;
//===----------------------------------------------------------------------===//
-// X86 Subtarget features.
+// X86 Subtarget features
//===----------------------------------------------------------------------===//
def FeatureCMOV : SubtargetFeature<"cmov","HasCMov", "true",
def FeatureSSSE3 : SubtargetFeature<"ssse3", "X86SSELevel", "SSSE3",
"Enable SSSE3 instructions",
[FeatureSSE3]>;
-def FeatureSSE41 : SubtargetFeature<"sse41", "X86SSELevel", "SSE41",
+def FeatureSSE41 : SubtargetFeature<"sse4.1", "X86SSELevel", "SSE41",
"Enable SSE 4.1 instructions",
[FeatureSSSE3]>;
-def FeatureSSE42 : SubtargetFeature<"sse42", "X86SSELevel", "SSE42",
+def FeatureSSE42 : SubtargetFeature<"sse4.2", "X86SSELevel", "SSE42",
"Enable SSE 4.2 instructions",
- [FeatureSSE41, FeaturePOPCNT]>;
+ [FeatureSSE41]>;
def Feature3DNow : SubtargetFeature<"3dnow", "X863DNowLevel", "ThreeDNow",
"Enable 3DNow! instructions",
[FeatureMMX]>;
def Feature64Bit : SubtargetFeature<"64bit", "HasX86_64", "true",
"Support 64-bit instructions",
[FeatureCMOV]>;
-def FeatureCMPXCHG16B : SubtargetFeature<"cmpxchg16b", "HasCmpxchg16b", "true",
+def FeatureCMPXCHG16B : SubtargetFeature<"cx16", "HasCmpxchg16b", "true",
"64-bit with cmpxchg16b",
[Feature64Bit]>;
def FeatureSlowBTMem : SubtargetFeature<"slow-bt-mem", "IsBTMemSlow", "true",
"Bit testing of memory is slow">;
+def FeatureSlowSHLD : SubtargetFeature<"slow-shld", "IsSHLDSlow", "true",
+ "SHLD instruction is slow">;
def FeatureFastUAMem : SubtargetFeature<"fast-unaligned-mem",
"IsUAMemFast", "true",
"Fast unaligned memory access">;
def FeatureSSE4A : SubtargetFeature<"sse4a", "HasSSE4A", "true",
"Support SSE 4a instructions",
- [FeaturePOPCNT]>;
+ [FeatureSSE3]>;
-def FeatureAVX : SubtargetFeature<"avx", "HasAVX", "true",
- "Enable AVX instructions">;
-def FeatureAVX2 : SubtargetFeature<"avx2", "HasAVX2", "true",
+def FeatureAVX : SubtargetFeature<"avx", "X86SSELevel", "AVX",
+ "Enable AVX instructions",
+ [FeatureSSE42]>;
+def FeatureAVX2 : SubtargetFeature<"avx2", "X86SSELevel", "AVX2",
"Enable AVX2 instructions",
[FeatureAVX]>;
-def FeatureCLMUL : SubtargetFeature<"clmul", "HasCLMUL", "true",
- "Enable carry-less multiplication instructions">;
-def FeatureFMA3 : SubtargetFeature<"fma3", "HasFMA3", "true",
- "Enable three-operand fused multiple-add">;
+def FeatureAVX512 : SubtargetFeature<"avx512f", "X86SSELevel", "AVX512F",
+ "Enable AVX-512 instructions",
+ [FeatureAVX2]>;
+def FeatureERI : SubtargetFeature<"avx512er", "HasERI", "true",
+ "Enable AVX-512 Exponential and Reciprocal Instructions",
+ [FeatureAVX512]>;
+def FeatureCDI : SubtargetFeature<"avx512cd", "HasCDI", "true",
+ "Enable AVX-512 Conflict Detection Instructions",
+ [FeatureAVX512]>;
+def FeaturePFI : SubtargetFeature<"avx512pf", "HasPFI", "true",
+ "Enable AVX-512 PreFetch Instructions",
+ [FeatureAVX512]>;
+
+def FeaturePCLMUL : SubtargetFeature<"pclmul", "HasPCLMUL", "true",
+ "Enable packed carry-less multiplication instructions",
+ [FeatureSSE2]>;
+def FeatureFMA : SubtargetFeature<"fma", "HasFMA", "true",
+ "Enable three-operand fused multiple-add",
+ [FeatureAVX]>;
def FeatureFMA4 : SubtargetFeature<"fma4", "HasFMA4", "true",
- "Enable four-operand fused multiple-add">;
-def FeatureXOP : SubtargetFeature<"xop", "HasXOP", "true",
- "Enable XOP instructions">;
+ "Enable four-operand fused multiple-add",
+ [FeatureAVX, FeatureSSE4A]>;
+def FeatureXOP : SubtargetFeature<"xop", "HasXOP", "true",
+ "Enable XOP instructions",
+ [FeatureFMA4]>;
def FeatureVectorUAMem : SubtargetFeature<"vector-unaligned-mem",
"HasVectorUAMem", "true",
"Allow unaligned memory operands on vector/SIMD instructions">;
def FeatureAES : SubtargetFeature<"aes", "HasAES", "true",
- "Enable AES instructions">;
+ "Enable AES instructions",
+ [FeatureSSE2]>;
+def FeatureTBM : SubtargetFeature<"tbm", "HasTBM", "true",
+ "Enable TBM instructions">;
def FeatureMOVBE : SubtargetFeature<"movbe", "HasMOVBE", "true",
"Support MOVBE instruction">;
-def FeatureRDRAND : SubtargetFeature<"rdrand", "HasRDRAND", "true",
+def FeatureRDRAND : SubtargetFeature<"rdrnd", "HasRDRAND", "true",
"Support RDRAND instruction">;
def FeatureF16C : SubtargetFeature<"f16c", "HasF16C", "true",
- "Support 16-bit floating point conversion instructions">;
+ "Support 16-bit floating point conversion instructions",
+ [FeatureAVX]>;
def FeatureFSGSBase : SubtargetFeature<"fsgsbase", "HasFSGSBase", "true",
"Support FS/GS Base instructions">;
def FeatureLZCNT : SubtargetFeature<"lzcnt", "HasLZCNT", "true",
"Support BMI instructions">;
def FeatureBMI2 : SubtargetFeature<"bmi2", "HasBMI2", "true",
"Support BMI2 instructions">;
+def FeatureRTM : SubtargetFeature<"rtm", "HasRTM", "true",
+ "Support RTM instructions">;
+def FeatureHLE : SubtargetFeature<"hle", "HasHLE", "true",
+ "Support HLE">;
+def FeatureADX : SubtargetFeature<"adx", "HasADX", "true",
+ "Support ADX instructions">;
+def FeatureSHA : SubtargetFeature<"sha", "HasSHA", "true",
+ "Enable SHA instructions",
+ [FeatureSSE2]>;
+def FeaturePRFCHW : SubtargetFeature<"prfchw", "HasPRFCHW", "true",
+ "Support PRFCHW instructions">;
+def FeatureRDSEED : SubtargetFeature<"rdseed", "HasRDSEED", "true",
+ "Support RDSEED instruction">;
+def FeatureLeaForSP : SubtargetFeature<"lea-sp", "UseLeaForSP", "true",
+ "Use LEA for adjusting the stack pointer">;
+def FeatureSlowDivide : SubtargetFeature<"idiv-to-divb",
+ "HasSlowDivide", "true",
+ "Use small divide for positive values less than 256">;
+def FeaturePadShortFunctions : SubtargetFeature<"pad-short-functions",
+ "PadShortFunctions", "true",
+ "Pad short functions">;
+def FeatureCallRegIndirect : SubtargetFeature<"call-reg-indirect",
+ "CallRegIndirect", "true",
+ "Call register indirect">;
+def FeatureLEAUsesAG : SubtargetFeature<"lea-uses-ag", "LEAUsesAG", "true",
+ "LEA instruction needs inputs at AG stage">;
+def FeatureSlowLEA : SubtargetFeature<"slow-lea", "SlowLEA", "true",
+ "LEA instruction with certain arguments is slow">;
//===----------------------------------------------------------------------===//
// X86 processors supported.
//===----------------------------------------------------------------------===//
+include "X86Schedule.td"
+
+def ProcIntelAtom : SubtargetFeature<"atom", "X86ProcFamily", "IntelAtom",
+ "Intel Atom processors">;
+def ProcIntelSLM : SubtargetFeature<"slm", "X86ProcFamily", "IntelSLM",
+ "Intel Silvermont processors">;
+
class Proc<string Name, list<SubtargetFeature> Features>
- : Processor<Name, NoItineraries, Features>;
+ : ProcessorModel<Name, GenericModel, Features>;
def : Proc<"generic", []>;
def : Proc<"i386", []>;
def : Proc<"pentium-m", [FeatureSSE2, FeatureSlowBTMem]>;
def : Proc<"pentium4", [FeatureSSE2]>;
def : Proc<"pentium4m", [FeatureSSE2, FeatureSlowBTMem]>;
-def : Proc<"x86-64", [FeatureSSE2, Feature64Bit, FeatureSlowBTMem]>;
-def : Proc<"yonah", [FeatureSSE3, FeatureSlowBTMem]>;
-def : Proc<"prescott", [FeatureSSE3, FeatureSlowBTMem]>;
-def : Proc<"nocona", [FeatureSSE3, FeatureCMPXCHG16B,
- FeatureSlowBTMem]>;
-def : Proc<"core2", [FeatureSSSE3, FeatureCMPXCHG16B,
- FeatureSlowBTMem]>;
-def : Proc<"penryn", [FeatureSSE41, FeatureCMPXCHG16B,
- FeatureSlowBTMem]>;
-def : Proc<"atom", [FeatureSSE3, FeatureCMPXCHG16B, FeatureMOVBE,
- FeatureSlowBTMem]>;
-// "Arrandale" along with corei3 and corei5
-def : Proc<"corei7", [FeatureSSE42, FeatureCMPXCHG16B,
- FeatureSlowBTMem, FeatureFastUAMem, FeatureAES]>;
-def : Proc<"nehalem", [FeatureSSE42, FeatureCMPXCHG16B,
+
+// Intel Core Duo.
+def : ProcessorModel<"yonah", SandyBridgeModel,
+ [FeatureSSE3, FeatureSlowBTMem]>;
+
+// NetBurst.
+def : Proc<"prescott", [FeatureSSE3, FeatureSlowBTMem]>;
+def : Proc<"nocona", [FeatureSSE3, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
+
+// Intel Core 2 Solo/Duo.
+def : ProcessorModel<"core2", SandyBridgeModel,
+ [FeatureSSSE3, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
+def : ProcessorModel<"penryn", SandyBridgeModel,
+ [FeatureSSE41, FeatureCMPXCHG16B, FeatureSlowBTMem]>;
+
+// Atom.
+def : ProcessorModel<"atom", AtomModel,
+ [ProcIntelAtom, FeatureSSSE3, FeatureCMPXCHG16B,
+ FeatureMOVBE, FeatureSlowBTMem, FeatureLeaForSP,
+ FeatureSlowDivide,
+ FeatureCallRegIndirect,
+ FeatureLEAUsesAG,
+ FeaturePadShortFunctions]>;
+
+// Atom Silvermont.
+def : ProcessorModel<"slm", SLMModel, [ProcIntelSLM,
+ FeatureSSE42, FeatureCMPXCHG16B,
+ FeatureMOVBE, FeaturePOPCNT,
+ FeaturePCLMUL, FeatureAES,
+ FeatureCallRegIndirect,
+ FeaturePRFCHW,
+ FeatureSlowLEA,
FeatureSlowBTMem, FeatureFastUAMem]>;
+// "Arrandale" along with corei3 and corei5
+def : ProcessorModel<"corei7", SandyBridgeModel,
+ [FeatureSSE42, FeatureCMPXCHG16B, FeatureSlowBTMem,
+ FeatureFastUAMem, FeaturePOPCNT, FeatureAES]>;
+
+def : ProcessorModel<"nehalem", SandyBridgeModel,
+ [FeatureSSE42, FeatureCMPXCHG16B, FeatureSlowBTMem,
+ FeatureFastUAMem, FeaturePOPCNT]>;
// Westmere is a similar machine to nehalem with some additional features.
// Westmere is the corei3/i5/i7 path from nehalem to sandybridge
-def : Proc<"westmere", [FeatureSSE42, FeatureCMPXCHG16B,
- FeatureSlowBTMem, FeatureFastUAMem, FeatureAES,
- FeatureCLMUL]>;
+def : ProcessorModel<"westmere", SandyBridgeModel,
+ [FeatureSSE42, FeatureCMPXCHG16B, FeatureSlowBTMem,
+ FeatureFastUAMem, FeaturePOPCNT, FeatureAES,
+ FeaturePCLMUL]>;
// Sandy Bridge
// SSE is not listed here since llvm treats AVX as a reimplementation of SSE,
// rather than a superset.
-// FIXME: Disabling AVX for now since it's not ready.
-def : Proc<"corei7-avx", [FeatureSSE42, FeatureCMPXCHG16B,
- FeatureAES, FeatureCLMUL]>;
+def : ProcessorModel<"corei7-avx", SandyBridgeModel,
+ [FeatureAVX, FeatureCMPXCHG16B, FeatureFastUAMem,
+ FeaturePOPCNT, FeatureAES, FeaturePCLMUL]>;
// Ivy Bridge
-def : Proc<"core-avx-i", [FeatureSSE42, FeatureCMPXCHG16B,
- FeatureAES, FeatureCLMUL,
- FeatureRDRAND, FeatureF16C, FeatureFSGSBase]>;
+def : ProcessorModel<"core-avx-i", SandyBridgeModel,
+ [FeatureAVX, FeatureCMPXCHG16B, FeatureFastUAMem,
+ FeaturePOPCNT, FeatureAES, FeaturePCLMUL, FeatureRDRAND,
+ FeatureF16C, FeatureFSGSBase]>;
// Haswell
-// FIXME: Disabling AVX/AVX2 for now since it's not ready.
-def : Proc<"core-avx2", [FeatureSSE42, FeatureCMPXCHG16B, FeatureAES,
- FeatureCLMUL, FeatureRDRAND, FeatureF16C,
- FeatureFSGSBase, FeatureFMA3, FeatureMOVBE,
- FeatureLZCNT, FeatureBMI, FeatureBMI2]>;
+def : ProcessorModel<"core-avx2", HaswellModel,
+ [FeatureAVX2, FeatureCMPXCHG16B, FeatureFastUAMem,
+ FeaturePOPCNT, FeatureAES, FeaturePCLMUL, FeatureRDRAND,
+ FeatureF16C, FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT,
+ FeatureBMI, FeatureBMI2, FeatureFMA, FeatureRTM,
+ FeatureHLE]>;
+
+// KNL
+// FIXME: define KNL model
+def : ProcessorModel<"knl", HaswellModel,
+ [FeatureAVX512, FeatureERI, FeatureCDI, FeaturePFI,
+ FeatureCMPXCHG16B, FeatureFastUAMem, FeaturePOPCNT,
+ FeatureAES, FeaturePCLMUL, FeatureRDRAND, FeatureF16C,
+ FeatureFSGSBase, FeatureMOVBE, FeatureLZCNT, FeatureBMI,
+ FeatureBMI2, FeatureFMA, FeatureRTM, FeatureHLE]>;
def : Proc<"k6", [FeatureMMX]>;
def : Proc<"k6-2", [Feature3DNow]>;
def : Proc<"k6-3", [Feature3DNow]>;
-def : Proc<"athlon", [Feature3DNowA, FeatureSlowBTMem]>;
-def : Proc<"athlon-tbird", [Feature3DNowA, FeatureSlowBTMem]>;
-def : Proc<"athlon-4", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem]>;
-def : Proc<"athlon-xp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem]>;
-def : Proc<"athlon-mp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem]>;
+def : Proc<"athlon", [Feature3DNowA, FeatureSlowBTMem,
+ FeatureSlowSHLD]>;
+def : Proc<"athlon-tbird", [Feature3DNowA, FeatureSlowBTMem,
+ FeatureSlowSHLD]>;
+def : Proc<"athlon-4", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
+ FeatureSlowSHLD]>;
+def : Proc<"athlon-xp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
+ FeatureSlowSHLD]>;
+def : Proc<"athlon-mp", [FeatureSSE1, Feature3DNowA, FeatureSlowBTMem,
+ FeatureSlowSHLD]>;
def : Proc<"k8", [FeatureSSE2, Feature3DNowA, Feature64Bit,
- FeatureSlowBTMem]>;
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
def : Proc<"opteron", [FeatureSSE2, Feature3DNowA, Feature64Bit,
- FeatureSlowBTMem]>;
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
def : Proc<"athlon64", [FeatureSSE2, Feature3DNowA, Feature64Bit,
- FeatureSlowBTMem]>;
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
def : Proc<"athlon-fx", [FeatureSSE2, Feature3DNowA, Feature64Bit,
- FeatureSlowBTMem]>;
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
def : Proc<"k8-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
- FeatureSlowBTMem]>;
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
def : Proc<"opteron-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
- FeatureSlowBTMem]>;
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
def : Proc<"athlon64-sse3", [FeatureSSE3, Feature3DNowA, FeatureCMPXCHG16B,
- FeatureSlowBTMem]>;
-def : Proc<"amdfam10", [FeatureSSE3, FeatureSSE4A,
+ FeatureSlowBTMem, FeatureSlowSHLD]>;
+def : Proc<"amdfam10", [FeatureSSE4A,
Feature3DNowA, FeatureCMPXCHG16B, FeatureLZCNT,
- FeatureSlowBTMem]>;
-// FIXME: Disabling AVX for now since it's not ready.
-def : Proc<"bdver1", [FeatureSSE42, FeatureSSE4A, FeatureCMPXCHG16B,
- FeatureAES, FeatureCLMUL, FeatureFMA4,
- FeatureXOP, FeatureLZCNT]>;
-def : Proc<"bdver2", [FeatureSSE42, FeatureSSE4A, FeatureCMPXCHG16B,
- FeatureAES, FeatureCLMUL, FeatureFMA4,
- FeatureXOP, FeatureF16C, FeatureLZCNT,
- FeatureBMI]>;
+ FeaturePOPCNT, FeatureSlowBTMem,
+ FeatureSlowSHLD]>;
+// Bobcat
+def : Proc<"btver1", [FeatureSSSE3, FeatureSSE4A, FeatureCMPXCHG16B,
+ FeaturePRFCHW, FeatureLZCNT, FeaturePOPCNT,
+ FeatureSlowSHLD]>;
+// Jaguar
+def : Proc<"btver2", [FeatureAVX, FeatureSSE4A, FeatureCMPXCHG16B,
+ FeaturePRFCHW, FeatureAES, FeaturePCLMUL,
+ FeatureBMI, FeatureF16C, FeatureMOVBE,
+ FeatureLZCNT, FeaturePOPCNT, FeatureSlowSHLD]>;
+// Bulldozer
+def : Proc<"bdver1", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
+ FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
+ FeatureLZCNT, FeaturePOPCNT, FeatureSlowSHLD]>;
+// Piledriver
+def : Proc<"bdver2", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
+ FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
+ FeatureF16C, FeatureLZCNT,
+ FeaturePOPCNT, FeatureBMI, FeatureTBM,
+ FeatureFMA, FeatureSlowSHLD]>;
+
+// Steamroller
+def : Proc<"bdver3", [FeatureXOP, FeatureFMA4, FeatureCMPXCHG16B,
+ FeatureAES, FeaturePRFCHW, FeaturePCLMUL,
+ FeatureF16C, FeatureLZCNT,
+ FeaturePOPCNT, FeatureBMI, FeatureTBM,
+ FeatureFMA, FeatureFSGSBase]>;
+
+// Excavator
+def : Proc<"bdver4", [FeatureAVX2, FeatureXOP, FeatureFMA4,
+ FeatureCMPXCHG16B, FeatureAES, FeaturePRFCHW,
+ FeaturePCLMUL, FeatureF16C, FeatureLZCNT,
+ FeaturePOPCNT, FeatureBMI, FeatureBMI2,
+ FeatureTBM, FeatureFMA, FeatureFSGSBase]>;
+
+def : Proc<"geode", [Feature3DNowA]>;
def : Proc<"winchip-c6", [FeatureMMX]>;
def : Proc<"winchip2", [Feature3DNow]>;
def : Proc<"c3", [Feature3DNow]>;
def : Proc<"c3-2", [FeatureSSE1]>;
+// We also provide a generic 64-bit specific x86 processor model which tries to
+// be good for modern chips without enabling instruction set encodings past the
+// basic SSE2 and 64-bit ones. It disables slow things from any mainstream and
+// modern 64-bit x86 chip, and enables features that are generally beneficial.
+//
+// We currently use the Sandy Bridge model as the default scheduling model as
+// we use it across Nehalem, Westmere, Sandy Bridge, and Ivy Bridge which
+// covers a huge swath of x86 processors. If there are specific scheduling
+// knobs which need to be tuned differently for AMD chips, we might consider
+// forming a common base for them.
+def : ProcessorModel<"x86-64", SandyBridgeModel,
+ [FeatureSSE2, Feature64Bit, FeatureSlowBTMem,
+ FeatureFastUAMem]>;
+
//===----------------------------------------------------------------------===//
// Register File Description
//===----------------------------------------------------------------------===//
// Assembly Parser
//===----------------------------------------------------------------------===//
-// Currently the X86 assembly parser only supports ATT syntax.
def ATTAsmParser : AsmParser {
- string AsmParserClassName = "ATTAsmParser";
+ string AsmParserClassName = "AsmParser";
+}
+
+def ATTAsmParserVariant : AsmParserVariant {
int Variant = 0;
+ // Variant name.
+ string Name = "att";
+
// Discard comments in assembly strings.
string CommentDelimiter = "#";
string RegisterPrefix = "%";
}
+def IntelAsmParserVariant : AsmParserVariant {
+ int Variant = 1;
+
+ // Variant name.
+ string Name = "intel";
+
+ // Discard comments in assembly strings.
+ string CommentDelimiter = ";";
+
+ // Recognize hard coded registers.
+ string RegisterPrefix = "";
+}
+
//===----------------------------------------------------------------------===//
// Assembly Printers
//===----------------------------------------------------------------------===//
def ATTAsmWriter : AsmWriter {
string AsmWriterClassName = "ATTInstPrinter";
int Variant = 0;
- bit isMCAsmWriter = 1;
}
def IntelAsmWriter : AsmWriter {
string AsmWriterClassName = "IntelInstPrinter";
int Variant = 1;
- bit isMCAsmWriter = 1;
}
def X86 : Target {
// Information about the instructions...
let InstructionSet = X86InstrInfo;
-
let AssemblyParsers = [ATTAsmParser];
-
+ let AssemblyParserVariants = [ATTAsmParserVariant, IntelAsmParserVariant];
let AssemblyWriters = [ATTAsmWriter, IntelAsmWriter];
}