MCAsmInfo: Explicitly set AllowDollarAtStartOfIdentifier to false for some targets

The default AllowDollarAtStartOfIdentifier will be changed to true to
align better with GNU Assembler where $ is a valid initial identifier
char.

Author: MaskRay

llvm/lib/Target/ARM/MCTargetDesc/ARMMCAsmInfo.cpp

@@ -53,6 +53,7 @@ ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin(const Triple &TheTriple) {
 
   Data64bitsDirective = nullptr;
   CommentString = "@";
+  AllowDollarAtStartOfIdentifier = false;
   UseDataRegionDirectives = true;
 
   SupportsDebugInformation = true;
@@ -80,6 +81,7 @@ ARMELFMCAsmInfo::ARMELFMCAsmInfo(const Triple &TheTriple) {
 
   Data64bitsDirective = nullptr;
   CommentString = "@";
+  AllowDollarAtStartOfIdentifier = false;
 
   SupportsDebugInformation = true;
 
@@ -137,6 +139,7 @@ ARMCOFFMCAsmInfoGNU::ARMCOFFMCAsmInfoGNU() {
   HasSingleParameterDotFile = true;
 
   CommentString = "@";
+  AllowDollarAtStartOfIdentifier = false;
   PrivateGlobalPrefix = ".L";
   PrivateLabelPrefix = ".L";
 

llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchMCAsmInfo.cpp

@@ -205,6 +205,7 @@ LoongArchMCAsmInfo::LoongArchMCAsmInfo(const Triple &TT) {
   Data64bitsDirective = "\t.dword\t";
   ZeroDirective = "\t.space\t";
   CommentString = "#";
+  AllowDollarAtStartOfIdentifier = false;
   SupportsDebugInformation = true;
   DwarfRegNumForCFI = true;
   ExceptionsType = ExceptionHandling::DwarfCFI;

llvm/lib/Target/Mips/MCTargetDesc/MipsMCAsmInfo.cpp

@@ -40,6 +40,7 @@ MipsELFMCAsmInfo::MipsELFMCAsmInfo(const Triple &TheTriple,
   Data32bitsDirective         = "\t.4byte\t";
   Data64bitsDirective         = "\t.8byte\t";
   CommentString               = "#";
+  AllowDollarAtStartOfIdentifier = false;
   ZeroDirective               = "\t.space\t";
   UseAssignmentForEHBegin = true;
   SupportsDebugInformation = true;

llvm/lib/Target/PowerPC/MCTargetDesc/PPCMCAsmInfo.cpp

@@ -192,6 +192,7 @@ PPCELFMCAsmInfo::PPCELFMCAsmInfo(bool is64Bit, const Triple& T) {
   SupportsDebugInformation = true;
 
   DollarIsPC = true;
+  AllowDollarAtStartOfIdentifier = false;
 
   // Set up DWARF directives
   MinInstAlignment = 4;
@@ -237,6 +238,7 @@ PPCXCOFFMCAsmInfo::PPCXCOFFMCAsmInfo(bool Is64Bit, const Triple &T) {
 
   // Support $ as PC in inline asm
   DollarIsPC = true;
+  AllowDollarAtStartOfIdentifier = false;
 
   UsesSetToEquateSymbol = true;
 

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

@@ -85,6 +85,8 @@ X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &T) {
   // wasn't always case preserving or something.
   CommentString = "##";
 
+  AllowDollarAtStartOfIdentifier = false;
+
   SupportsDebugInformation = true;
   UseDataRegionDirectives = MarkedJTDataRegions;
 
@@ -124,6 +126,7 @@ X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
   CalleeSaveStackSlotSize = is64Bit ? 8 : 4;
 
   AssemblerDialect = X86AsmSyntax;
+  AllowDollarAtStartOfIdentifier = false;
 
   // Debug Information
   SupportsDebugInformation = true;
@@ -162,6 +165,7 @@ X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
   ExceptionsType = ExceptionHandling::WinEH;
 
   AssemblerDialect = X86AsmSyntax;
+  AllowDollarAtStartOfIdentifier = false;
 
   AllowAtInName = true;
 
@@ -199,6 +203,7 @@ X86MCAsmInfoGNUCOFF::X86MCAsmInfoGNUCOFF(const Triple &Triple) {
   AssemblerDialect = X86AsmSyntax;
 
   AllowAtInName = true;
+  AllowDollarAtStartOfIdentifier = false;
 
   initializeAtSpecifiers(atSpecifiers);
 }