-/*===-- Lexer.l - Scanner for llvm assembly files ----------------*- C++ -*--=//
+/*===-- Lexer.l - Scanner for llvm assembly files --------------*- C++ -*--===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file implements the flex scanner for LLVM assembly languages files.
//
-//===------------------------------------------------------------------------=*/
+//===----------------------------------------------------------------------===*/
%option prefix="llvmAsm"
%option yylineno
%{
#include "ParserInternals.h"
-#include "llvm/BasicBlock.h"
-#include "llvm/Method.h"
#include "llvm/Module.h"
#include <list>
#include "llvmAsmParser.h"
+#include <cctype>
+#include <cstdlib>
#define RET_TOK(type, Enum, sym) \
llvmAsmlval.type = Instruction::Enum; return sym
// TODO: All of the static identifiers are figured out by the lexer,
-// these should be hashed.
+// these should be hashed to reduce the lexer size
// atoull - Convert an ascii string of decimal digits into the unsigned long
// long representation... this does not have to do input error checking,
// because we know that the input will be matched by a suitable regex...
//
-uint64_t atoull(const char *Buffer) {
+static uint64_t atoull(const char *Buffer) {
uint64_t Result = 0;
for (; *Buffer; Buffer++) {
uint64_t OldRes = Result;
Result *= 10;
Result += *Buffer-'0';
- if (Result < OldRes) { // Uh, oh, overflow detected!!!
+ if (Result < OldRes) // Uh, oh, overflow detected!!!
+ ThrowException("constant bigger than 64 bits detected!");
+ }
+ return Result;
+}
+
+static uint64_t HexIntToVal(const char *Buffer) {
+ uint64_t Result = 0;
+ for (; *Buffer; ++Buffer) {
+ uint64_t OldRes = Result;
+ Result *= 16;
+ char C = *Buffer;
+ if (C >= '0' && C <= '9')
+ Result += C-'0';
+ else if (C >= 'A' && C <= 'F')
+ Result += C-'A'+10;
+ else if (C >= 'a' && C <= 'f')
+ Result += C-'a'+10;
+
+ if (Result < OldRes) // Uh, oh, overflow detected!!!
ThrowException("constant bigger than 64 bits detected!");
- }
}
return Result;
}
+// HexToFP - Convert the ascii string in hexidecimal format to the floating
+// point representation of it.
+//
+static double HexToFP(const char *Buffer) {
+ // Behave nicely in the face of C TBAA rules... see:
+ // http://www.nullstone.com/htmls/category/aliastyp.htm
+ union {
+ uint64_t UI;
+ double FP;
+ } UIntToFP;
+ UIntToFP.UI = HexIntToVal(Buffer);
+
+ assert(sizeof(double) == sizeof(uint64_t) &&
+ "Data sizes incompatible on this target!");
+ return UIntToFP.FP; // Cast Hex constant to double
+}
+
+
+// UnEscapeLexed - Run through the specified buffer and change \xx codes to the
+// appropriate character. If AllowNull is set to false, a \00 value will cause
+// an exception to be thrown.
+//
+// If AllowNull is set to true, the return value of the function points to the
+// last character of the string in memory.
+//
+char *UnEscapeLexed(char *Buffer, bool AllowNull) {
+ char *BOut = Buffer;
+ for (char *BIn = Buffer; *BIn; ) {
+ if (BIn[0] == '\\' && isxdigit(BIn[1]) && isxdigit(BIn[2])) {
+ char Tmp = BIn[3]; BIn[3] = 0; // Terminate string
+ *BOut = strtol(BIn+1, 0, 16); // Convert to number
+ if (!AllowNull && !*BOut)
+ ThrowException("String literal cannot accept \\00 escape!");
+
+ BIn[3] = Tmp; // Restore character
+ BIn += 3; // Skip over handled chars
+ ++BOut;
+ } else {
+ *BOut++ = *BIn++;
+ }
+ }
+
+ return BOut;
+}
+
#define YY_NEVER_INTERACTIVE 1
%}
Comment ;.*
/* Variable(Value) identifiers start with a % sign */
-VarID %[a-zA-Z$._][a-zA-Z$._0-9]*
+VarID %[-a-zA-Z$._][-a-zA-Z$._0-9]*
/* Label identifiers end with a colon */
-Label [a-zA-Z$._0-9]+:
+Label [-a-zA-Z$._0-9]+:
/* Quoted names can contain any character except " and \ */
-StringConstant \"[^\"]+\"
+StringConstant \"[^\"]*\"
/* [PN]Integer: match positive and negative literal integer values that
NInteger -[0-9]+
/* FPConstant - A Floating point constant.
- TODO: Expand lexer to support 10e50 FP constant notation */
-FPConstant [0-9]+[.][0-9]*
+ */
+FPConstant [-+]?[0-9]+[.][0-9]*([eE][-+]?[0-9]+)?
+/* HexFPConstant - Floating point constant represented in IEEE format as a
+ * hexadecimal number for when exponential notation is not precise enough.
+ */
+HexFPConstant 0x[0-9A-Fa-f]+
+
+/* HexIntConstant - Hexadecimal constant generated by the CFE to avoid forcing
+ * it to deal with 64 bit numbers.
+ */
+HexIntConstant [us]0x[0-9A-Fa-f]+
%%
{Comment} { /* Ignore comments for now */ }
begin { return BEGINTOK; }
-end { return END; }
+end { return ENDTOK; }
true { return TRUE; }
false { return FALSE; }
declare { return DECLARE; }
+global { return GLOBAL; }
+constant { return CONSTANT; }
+const { return CONST; }
+internal { return INTERNAL; }
+linkonce { return LINKONCE; }
+weak { return WEAK; }
+appending { return APPENDING; }
+uninitialized { return EXTERNAL; } /* Deprecated, turn into external */
+external { return EXTERNAL; }
implementation { return IMPLEMENTATION; }
+zeroinitializer { return ZEROINITIALIZER; }
\.\.\. { return DOTDOTDOT; }
-
-void { llvmAsmlval.TypeVal = Type::VoidTy ; return VOID; }
-bool { llvmAsmlval.TypeVal = Type::BoolTy ; return BOOL; }
-sbyte { llvmAsmlval.TypeVal = Type::SByteTy ; return SBYTE; }
-ubyte { llvmAsmlval.TypeVal = Type::UByteTy ; return UBYTE; }
-short { llvmAsmlval.TypeVal = Type::ShortTy ; return SHORT; }
-ushort { llvmAsmlval.TypeVal = Type::UShortTy; return USHORT; }
-int { llvmAsmlval.TypeVal = Type::IntTy ; return INT; }
-uint { llvmAsmlval.TypeVal = Type::UIntTy ; return UINT; }
-long { llvmAsmlval.TypeVal = Type::LongTy ; return LONG; }
-ulong { llvmAsmlval.TypeVal = Type::ULongTy ; return ULONG; }
-float { llvmAsmlval.TypeVal = Type::FloatTy ; return FLOAT; }
-double { llvmAsmlval.TypeVal = Type::DoubleTy; return DOUBLE; }
-
-type { llvmAsmlval.TypeVal = Type::TypeTy ; return TYPE; }
-
-label { llvmAsmlval.TypeVal = Type::LabelTy ; return LABEL; }
-
-
-not { RET_TOK(UnaryOpVal, Not, NOT); }
+null { return NULL_TOK; }
+to { return TO; }
+except { return EXCEPT; }
+not { return NOT; } /* Deprecated, turned into XOR */
+target { return TARGET; }
+endian { return ENDIAN; }
+pointersize { return POINTERSIZE; }
+little { return LITTLE; }
+big { return BIG; }
+volatile { return VOLATILE; }
+
+void { llvmAsmlval.PrimType = Type::VoidTy ; return VOID; }
+bool { llvmAsmlval.PrimType = Type::BoolTy ; return BOOL; }
+sbyte { llvmAsmlval.PrimType = Type::SByteTy ; return SBYTE; }
+ubyte { llvmAsmlval.PrimType = Type::UByteTy ; return UBYTE; }
+short { llvmAsmlval.PrimType = Type::ShortTy ; return SHORT; }
+ushort { llvmAsmlval.PrimType = Type::UShortTy; return USHORT; }
+int { llvmAsmlval.PrimType = Type::IntTy ; return INT; }
+uint { llvmAsmlval.PrimType = Type::UIntTy ; return UINT; }
+long { llvmAsmlval.PrimType = Type::LongTy ; return LONG; }
+ulong { llvmAsmlval.PrimType = Type::ULongTy ; return ULONG; }
+float { llvmAsmlval.PrimType = Type::FloatTy ; return FLOAT; }
+double { llvmAsmlval.PrimType = Type::DoubleTy; return DOUBLE; }
+type { llvmAsmlval.PrimType = Type::TypeTy ; return TYPE; }
+label { llvmAsmlval.PrimType = Type::LabelTy ; return LABEL; }
+opaque { return OPAQUE; }
add { RET_TOK(BinaryOpVal, Add, ADD); }
sub { RET_TOK(BinaryOpVal, Sub, SUB); }
mul { RET_TOK(BinaryOpVal, Mul, MUL); }
div { RET_TOK(BinaryOpVal, Div, DIV); }
rem { RET_TOK(BinaryOpVal, Rem, REM); }
+and { RET_TOK(BinaryOpVal, And, AND); }
+or { RET_TOK(BinaryOpVal, Or , OR ); }
+xor { RET_TOK(BinaryOpVal, Xor, XOR); }
setne { RET_TOK(BinaryOpVal, SetNE, SETNE); }
seteq { RET_TOK(BinaryOpVal, SetEQ, SETEQ); }
setlt { RET_TOK(BinaryOpVal, SetLT, SETLT); }
setle { RET_TOK(BinaryOpVal, SetLE, SETLE); }
setge { RET_TOK(BinaryOpVal, SetGE, SETGE); }
-to { return TO; }
-phi { RET_TOK(OtherOpVal, PHINode, PHI); }
+phi { RET_TOK(OtherOpVal, PHI, PHI_TOK); }
call { RET_TOK(OtherOpVal, Call, CALL); }
cast { RET_TOK(OtherOpVal, Cast, CAST); }
shl { RET_TOK(OtherOpVal, Shl, SHL); }
shr { RET_TOK(OtherOpVal, Shr, SHR); }
+va_arg { return VA_ARG; /* FIXME: OBSOLETE */}
+vanext { RET_TOK(OtherOpVal, VANext, VANEXT); }
+vaarg { RET_TOK(OtherOpVal, VAArg , VAARG); }
ret { RET_TOK(TermOpVal, Ret, RET); }
br { RET_TOK(TermOpVal, Br, BR); }
switch { RET_TOK(TermOpVal, Switch, SWITCH); }
+invoke { RET_TOK(TermOpVal, Invoke, INVOKE); }
+unwind { RET_TOK(TermOpVal, Unwind, UNWIND); }
malloc { RET_TOK(MemOpVal, Malloc, MALLOC); }
getelementptr { RET_TOK(MemOpVal, GetElementPtr, GETELEMENTPTR); }
-{VarID} { llvmAsmlval.StrVal = strdup(yytext+1); return VAR_ID; }
-{Label} {
+{VarID} {
+ UnEscapeLexed(yytext+1);
+ llvmAsmlval.StrVal = strdup(yytext+1); // Skip %
+ return VAR_ID;
+ }
+{Label} {
yytext[strlen(yytext)-1] = 0; // nuke colon
- llvmAsmlval.StrVal = strdup(yytext);
+ UnEscapeLexed(yytext);
+ llvmAsmlval.StrVal = strdup(yytext);
return LABELSTR;
}
-{StringConstant} {
+{StringConstant} { // Note that we cannot unescape a string constant here! The
+ // string constant might contain a \00 which would not be
+ // understood by the string stuff. It is valid to make a
+ // [sbyte] c"Hello World\00" constant, for example.
+ //
yytext[strlen(yytext)-1] = 0; // nuke end quote
- llvmAsmlval.StrVal = strdup(yytext+1); // Nuke start quote
+ llvmAsmlval.StrVal = strdup(yytext+1); // Nuke start quote
return STRINGCONSTANT;
- }
+ }
{PInteger} { llvmAsmlval.UInt64Val = atoull(yytext); return EUINT64VAL; }
llvmAsmlval.SInt64Val = -Val;
return ESINT64VAL;
}
-
+{HexIntConstant} {
+ llvmAsmlval.UInt64Val = HexIntToVal(yytext+3);
+ return yytext[0] == 's' ? ESINT64VAL : EUINT64VAL;
+ }
{EPInteger} { llvmAsmlval.UIntVal = atoull(yytext+1); return UINTVAL; }
{ENInteger} {
}
{FPConstant} { llvmAsmlval.FPVal = atof(yytext); return FPVAL; }
+{HexFPConstant} { llvmAsmlval.FPVal = HexToFP(yytext); return FPVAL; }
[ \t\n] { /* Ignore whitespace */ }
-. { /*printf("'%s'", yytext);*/ return yytext[0]; }
+. { return yytext[0]; }
%%
projects / oota-llvm.git / blobdiff