//===----------------------------------------------------------------------===//
#include "MILexer.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include <cctype>
const char *End;
public:
+ Cursor(NoneType) : Ptr(nullptr), End(nullptr) {}
+
explicit Cursor(StringRef Str) {
Ptr = Str.data();
End = Ptr + Str.size();
}
StringRef::iterator location() const { return Ptr; }
+
+ operator bool() const { return Ptr != nullptr; }
};
} // end anonymous namespace
return C;
}
+/// Return true if the given character satisfies the following regular
+/// expression: [-a-zA-Z$._0-9]
static bool isIdentifierChar(char C) {
- return isalpha(C) || isdigit(C) || C == '_' || C == '-' || C == '.';
+ return isalpha(C) || isdigit(C) || C == '_' || C == '-' || C == '.' ||
+ C == '$';
+}
+
+/// Unescapes the given string value.
+///
+/// Expects the string value to be quoted.
+static std::string unescapeQuotedString(StringRef Value) {
+ assert(Value.front() == '"' && Value.back() == '"');
+ Cursor C = Cursor(Value.substr(1, Value.size() - 2));
+
+ std::string Str;
+ Str.reserve(C.remaining().size());
+ while (!C.isEOF()) {
+ char Char = C.peek();
+ if (Char == '\\') {
+ if (C.peek(1) == '\\') {
+ // Two '\' become one
+ Str += '\\';
+ C.advance(2);
+ continue;
+ }
+ if (isxdigit(C.peek(1)) && isxdigit(C.peek(2))) {
+ Str += hexDigitValue(C.peek(1)) * 16 + hexDigitValue(C.peek(2));
+ C.advance(3);
+ continue;
+ }
+ }
+ Str += Char;
+ C.advance();
+ }
+ return Str;
}
-static Cursor lexIdentifier(Cursor C, MIToken &Token) {
+/// Lex a string constant using the following regular expression: \"[^\"]*\"
+static Cursor lexStringConstant(
+ Cursor C,
+ function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ assert(C.peek() == '"');
+ for (C.advance(); C.peek() != '"'; C.advance()) {
+ if (C.isEOF()) {
+ ErrorCallback(
+ C.location(),
+ "end of machine instruction reached before the closing '\"'");
+ return None;
+ }
+ }
+ C.advance();
+ return C;
+}
+
+static Cursor lexName(
+ Cursor C, MIToken &Token, MIToken::TokenKind Type, unsigned PrefixLength,
+ function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ auto Range = C;
+ C.advance(PrefixLength);
+ if (C.peek() == '"') {
+ if (Cursor R = lexStringConstant(C, ErrorCallback)) {
+ StringRef String = Range.upto(R);
+ Token = MIToken(Type, String,
+ unescapeQuotedString(String.drop_front(PrefixLength)),
+ PrefixLength);
+ return R;
+ }
+ Token = MIToken(MIToken::Error, Range.remaining());
+ return Range;
+ }
+ while (isIdentifierChar(C.peek()))
+ C.advance();
+ Token = MIToken(Type, Range.upto(C), PrefixLength);
+ return C;
+}
+
+static Cursor maybeLexIntegerType(Cursor C, MIToken &Token) {
+ if (C.peek() != 'i' || !isdigit(C.peek(1)))
+ return None;
+ auto Range = C;
+ C.advance(); // Skip 'i'
+ while (isdigit(C.peek()))
+ C.advance();
+ Token = MIToken(MIToken::IntegerType, Range.upto(C));
+ return C;
+}
+
+static MIToken::TokenKind getIdentifierKind(StringRef Identifier) {
+ return StringSwitch<MIToken::TokenKind>(Identifier)
+ .Case("_", MIToken::underscore)
+ .Case("implicit", MIToken::kw_implicit)
+ .Case("implicit-def", MIToken::kw_implicit_define)
+ .Case("dead", MIToken::kw_dead)
+ .Case("killed", MIToken::kw_killed)
+ .Case("undef", MIToken::kw_undef)
+ .Case("early-clobber", MIToken::kw_early_clobber)
+ .Case("debug-use", MIToken::kw_debug_use)
+ .Case("frame-setup", MIToken::kw_frame_setup)
+ .Case("debug-location", MIToken::kw_debug_location)
+ .Case(".cfi_offset", MIToken::kw_cfi_offset)
+ .Case(".cfi_def_cfa_register", MIToken::kw_cfi_def_cfa_register)
+ .Case(".cfi_def_cfa_offset", MIToken::kw_cfi_def_cfa_offset)
+ .Case(".cfi_def_cfa", MIToken::kw_cfi_def_cfa)
+ .Case("blockaddress", MIToken::kw_blockaddress)
+ .Case("target-index", MIToken::kw_target_index)
+ .Case("half", MIToken::kw_half)
+ .Case("float", MIToken::kw_float)
+ .Case("double", MIToken::kw_double)
+ .Case("x86_fp80", MIToken::kw_x86_fp80)
+ .Case("fp128", MIToken::kw_fp128)
+ .Case("ppc_fp128", MIToken::kw_ppc_fp128)
+ .Case("target-flags", MIToken::kw_target_flags)
+ .Case("volatile", MIToken::kw_volatile)
+ .Default(MIToken::Identifier);
+}
+
+static Cursor maybeLexIdentifier(Cursor C, MIToken &Token) {
+ if (!isalpha(C.peek()) && C.peek() != '_' && C.peek() != '.')
+ return None;
auto Range = C;
while (isIdentifierChar(C.peek()))
C.advance();
auto Identifier = Range.upto(C);
- Token = MIToken(Identifier == "_" ? MIToken::underscore : MIToken::Identifier,
- Identifier);
+ Token = MIToken(getIdentifierKind(Identifier), Identifier);
return C;
}
-static Cursor lexMachineBasicBlock(
+static Cursor maybeLexMachineBasicBlock(
Cursor C, MIToken &Token,
function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ if (!C.remaining().startswith("%bb."))
+ return None;
auto Range = C;
C.advance(4); // Skip '%bb.'
if (!isdigit(C.peek())) {
return C;
}
-static Cursor lexPercent(Cursor C, MIToken &Token) {
+static Cursor maybeLexIndex(Cursor C, MIToken &Token, StringRef Rule,
+ MIToken::TokenKind Kind) {
+ if (!C.remaining().startswith(Rule) || !isdigit(C.peek(Rule.size())))
+ return None;
+ auto Range = C;
+ C.advance(Rule.size());
+ auto NumberRange = C;
+ while (isdigit(C.peek()))
+ C.advance();
+ Token = MIToken(Kind, Range.upto(C), APSInt(NumberRange.upto(C)));
+ return C;
+}
+
+static Cursor maybeLexIndexAndName(Cursor C, MIToken &Token, StringRef Rule,
+ MIToken::TokenKind Kind) {
+ if (!C.remaining().startswith(Rule) || !isdigit(C.peek(Rule.size())))
+ return None;
+ auto Range = C;
+ C.advance(Rule.size());
+ auto NumberRange = C;
+ while (isdigit(C.peek()))
+ C.advance();
+ StringRef Number = NumberRange.upto(C);
+ unsigned StringOffset = Rule.size() + Number.size();
+ if (C.peek() == '.') {
+ C.advance();
+ ++StringOffset;
+ while (isIdentifierChar(C.peek()))
+ C.advance();
+ }
+ Token = MIToken(Kind, Range.upto(C), APSInt(Number), StringOffset);
+ return C;
+}
+
+static Cursor maybeLexJumpTableIndex(Cursor C, MIToken &Token) {
+ return maybeLexIndex(C, Token, "%jump-table.", MIToken::JumpTableIndex);
+}
+
+static Cursor maybeLexStackObject(Cursor C, MIToken &Token) {
+ return maybeLexIndexAndName(C, Token, "%stack.", MIToken::StackObject);
+}
+
+static Cursor maybeLexFixedStackObject(Cursor C, MIToken &Token) {
+ return maybeLexIndex(C, Token, "%fixed-stack.", MIToken::FixedStackObject);
+}
+
+static Cursor maybeLexConstantPoolItem(Cursor C, MIToken &Token) {
+ return maybeLexIndex(C, Token, "%const.", MIToken::ConstantPoolItem);
+}
+
+static Cursor maybeLexIRBlock(
+ Cursor C, MIToken &Token,
+ function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ const StringRef Rule = "%ir-block.";
+ if (!C.remaining().startswith(Rule))
+ return None;
+ if (isdigit(C.peek(Rule.size())))
+ return maybeLexIndex(C, Token, Rule, MIToken::IRBlock);
+ return lexName(C, Token, MIToken::NamedIRBlock, Rule.size(), ErrorCallback);
+}
+
+static Cursor maybeLexIRValue(
+ Cursor C, MIToken &Token,
+ function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ const StringRef Rule = "%ir.";
+ if (!C.remaining().startswith(Rule))
+ return None;
+ return lexName(C, Token, MIToken::NamedIRValue, Rule.size(), ErrorCallback);
+}
+
+static Cursor lexVirtualRegister(Cursor C, MIToken &Token) {
+ auto Range = C;
+ C.advance(); // Skip '%'
+ auto NumberRange = C;
+ while (isdigit(C.peek()))
+ C.advance();
+ Token = MIToken(MIToken::VirtualRegister, Range.upto(C),
+ APSInt(NumberRange.upto(C)));
+ return C;
+}
+
+static Cursor maybeLexRegister(Cursor C, MIToken &Token) {
+ if (C.peek() != '%')
+ return None;
+ if (isdigit(C.peek(1)))
+ return lexVirtualRegister(C, Token);
auto Range = C;
C.advance(); // Skip '%'
while (isIdentifierChar(C.peek()))
return C;
}
-static Cursor lexIntegerLiteral(Cursor C, MIToken &Token) {
+static Cursor maybeLexGlobalValue(
+ Cursor C, MIToken &Token,
+ function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ if (C.peek() != '@')
+ return None;
+ if (!isdigit(C.peek(1)))
+ return lexName(C, Token, MIToken::NamedGlobalValue, /*PrefixLength=*/1,
+ ErrorCallback);
+ auto Range = C;
+ C.advance(1); // Skip the '@'
+ auto NumberRange = C;
+ while (isdigit(C.peek()))
+ C.advance();
+ Token =
+ MIToken(MIToken::GlobalValue, Range.upto(C), APSInt(NumberRange.upto(C)));
+ return C;
+}
+
+static Cursor maybeLexExternalSymbol(
+ Cursor C, MIToken &Token,
+ function_ref<void(StringRef::iterator Loc, const Twine &)> ErrorCallback) {
+ if (C.peek() != '$')
+ return None;
+ return lexName(C, Token, MIToken::ExternalSymbol, /*PrefixLength=*/1,
+ ErrorCallback);
+}
+
+static bool isValidHexFloatingPointPrefix(char C) {
+ return C == 'H' || C == 'K' || C == 'L' || C == 'M';
+}
+
+static Cursor maybeLexHexFloatingPointLiteral(Cursor C, MIToken &Token) {
+ if (C.peek() != '0' || C.peek(1) != 'x')
+ return None;
+ Cursor Range = C;
+ C.advance(2); // Skip '0x'
+ if (isValidHexFloatingPointPrefix(C.peek()))
+ C.advance();
+ while (isxdigit(C.peek()))
+ C.advance();
+ Token = MIToken(MIToken::FloatingPointLiteral, Range.upto(C));
+ return C;
+}
+
+static Cursor lexFloatingPointLiteral(Cursor Range, Cursor C, MIToken &Token) {
+ C.advance();
+ // Skip over [0-9]*([eE][-+]?[0-9]+)?
+ while (isdigit(C.peek()))
+ C.advance();
+ if ((C.peek() == 'e' || C.peek() == 'E') &&
+ (isdigit(C.peek(1)) ||
+ ((C.peek(1) == '-' || C.peek(1) == '+') && isdigit(C.peek(2))))) {
+ C.advance(2);
+ while (isdigit(C.peek()))
+ C.advance();
+ }
+ Token = MIToken(MIToken::FloatingPointLiteral, Range.upto(C));
+ return C;
+}
+
+static Cursor maybeLexNumericalLiteral(Cursor C, MIToken &Token) {
+ if (!isdigit(C.peek()) && (C.peek() != '-' || !isdigit(C.peek(1))))
+ return None;
auto Range = C;
C.advance();
while (isdigit(C.peek()))
C.advance();
+ if (C.peek() == '.')
+ return lexFloatingPointLiteral(Range, C, Token);
StringRef StrVal = Range.upto(C);
Token = MIToken(MIToken::IntegerLiteral, StrVal, APSInt(StrVal));
return C;
return MIToken::comma;
case '=':
return MIToken::equal;
+ case ':':
+ return MIToken::colon;
+ case '!':
+ return MIToken::exclaim;
+ case '(':
+ return MIToken::lparen;
+ case ')':
+ return MIToken::rparen;
+ case '+':
+ return MIToken::plus;
+ case '-':
+ return MIToken::minus;
default:
return MIToken::Error;
}
}
-static Cursor lexSymbol(Cursor C, MIToken::TokenKind Kind, MIToken &Token) {
+static Cursor maybeLexSymbol(Cursor C, MIToken &Token) {
+ MIToken::TokenKind Kind;
+ unsigned Length = 1;
+ if (C.peek() == ':' && C.peek(1) == ':') {
+ Kind = MIToken::coloncolon;
+ Length = 2;
+ } else
+ Kind = symbolToken(C.peek());
+ if (Kind == MIToken::Error)
+ return None;
auto Range = C;
- C.advance();
+ C.advance(Length);
Token = MIToken(Kind, Range.upto(C));
return C;
}
return C.remaining();
}
- auto Char = C.peek();
- if (isalpha(Char) || Char == '_')
- return lexIdentifier(C, Token).remaining();
- if (Char == '%') {
- if (C.remaining().startswith("%bb."))
- return lexMachineBasicBlock(C, Token, ErrorCallback).remaining();
- return lexPercent(C, Token).remaining();
- }
- if (isdigit(Char) || (Char == '-' && isdigit(C.peek(1))))
- return lexIntegerLiteral(C, Token).remaining();
- MIToken::TokenKind Kind = symbolToken(Char);
- if (Kind != MIToken::Error)
- return lexSymbol(C, Kind, Token).remaining();
+ if (Cursor R = maybeLexIntegerType(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexIdentifier(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexMachineBasicBlock(C, Token, ErrorCallback))
+ return R.remaining();
+ if (Cursor R = maybeLexJumpTableIndex(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexStackObject(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexFixedStackObject(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexConstantPoolItem(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexIRBlock(C, Token, ErrorCallback))
+ return R.remaining();
+ if (Cursor R = maybeLexIRValue(C, Token, ErrorCallback))
+ return R.remaining();
+ if (Cursor R = maybeLexRegister(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexGlobalValue(C, Token, ErrorCallback))
+ return R.remaining();
+ if (Cursor R = maybeLexExternalSymbol(C, Token, ErrorCallback))
+ return R.remaining();
+ if (Cursor R = maybeLexHexFloatingPointLiteral(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexNumericalLiteral(C, Token))
+ return R.remaining();
+ if (Cursor R = maybeLexSymbol(C, Token))
+ return R.remaining();
+
Token = MIToken(MIToken::Error, C.remaining());
ErrorCallback(C.location(),
- Twine("unexpected character '") + Twine(Char) + "'");
+ Twine("unexpected character '") + Twine(C.peek()) + "'");
return C.remaining();
}
projects / oota-llvm.git / blobdiff