[X86] Rename the x86-asm-syntax variable. NFC

Follow-up to #109360. x86-asm-syntax is for input instead of output.

Author: MaskRay

llvm/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp

@@ -23,9 +23,9 @@ enum AsmWriterFlavorTy {
   ATT = 0, Intel = 1
 };
 
-static cl::opt<AsmWriterFlavorTy> AsmWriterFlavor(
+static cl::opt<AsmWriterFlavorTy> X86AsmSyntax(
     "x86-asm-syntax", cl::init(ATT), cl::Hidden,
-    cl::desc("Choose style of code to emit from X86 backend:"),
+    cl::desc("Select the assembly style for input"),
     cl::values(clEnumValN(ATT, "att", "Emit AT&T-style assembly"),
                clEnumValN(Intel, "intel", "Emit Intel-style assembly")));
 
@@ -41,7 +41,7 @@ X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &T) {
   if (is64Bit)
     CodePointerSize = CalleeSaveStackSlotSize = 8;
 
-  AssemblerDialect = AsmWriterFlavor;
+  AssemblerDialect = X86AsmSyntax;
 
   if (!is64Bit)
     Data64bitsDirective = nullptr;       // we can't emit a 64-bit unit
@@ -89,7 +89,7 @@ X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
   // OTOH, stack slot size is always 8 for x86-64, even with the x32 ABI.
   CalleeSaveStackSlotSize = is64Bit ? 8 : 4;
 
-  AssemblerDialect = AsmWriterFlavor;
+  AssemblerDialect = X86AsmSyntax;
 
   // Debug Information
   SupportsDebugInformation = true;
@@ -126,7 +126,7 @@ X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
 
   ExceptionsType = ExceptionHandling::WinEH;
 
-  AssemblerDialect = AsmWriterFlavor;
+  AssemblerDialect = X86AsmSyntax;
 
   AllowAtInName = true;
 }
@@ -159,7 +159,7 @@ X86MCAsmInfoGNUCOFF::X86MCAsmInfoGNUCOFF(const Triple &Triple) {
     ExceptionsType = ExceptionHandling::DwarfCFI;
   }
 
-  AssemblerDialect = AsmWriterFlavor;
+  AssemblerDialect = X86AsmSyntax;
 
   AllowAtInName = true;
 }