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Commit ad28cff7 by Neil Booth Committed by Neil Booth
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cppexp.c (cpp_num_mul): Remove unused parameter. 

	* cppexp.c (cpp_num_mul): Remove unused parameter.
	(UNARY, BINARY, OTHER, binary_handler): Remove.
	(ALWAYS_EVAL): New.
	(optab): Update.
	(reduce): Refactor to a large switch, don't use a function
	pointer.

From-SVN: r55570
parent 139b7f86
Showing with 148 additions and 105 deletions
gcc/ChangeLog
2002-07-18 Neil Booth <neil@daikokuya.co.uk>
* cppexp.c (cpp_num_mul): Remove unused parameter.
(UNARY, BINARY, OTHER, binary_handler): Remove.
(ALWAYS_EVAL): New.
(optab): Update.
(reduce): Refactor to a large switch, don't use a function
pointer.
2002-07-18 Bo Thorsen <bo@berlioz.suse.de>
* config/i386/linux64.h (STARTFILE_PREFIX_SPEC): Define this always.
......
gcc/cppexp.c
......@@ -30,7 +30,7 @@ Boston, MA 02111-1307, USA. */
struct op
{
cpp_num value; /* The value logically "right" of op. */
cpp_num value; /* The value logically "right" of op. */
enum cpp_ttype op;
};
......@@ -52,8 +52,7 @@ static cpp_num num_inequality_op PARAMS ((cpp_reader *, cpp_num, cpp_num,
enum cpp_ttype));
static cpp_num num_equality_op PARAMS ((cpp_reader *, cpp_num, cpp_num,
enum cpp_ttype));
static cpp_num num_mul PARAMS ((cpp_reader *, cpp_num, cpp_num,
enum cpp_ttype));
static cpp_num num_mul PARAMS ((cpp_reader *, cpp_num, cpp_num));
static cpp_num num_div_op PARAMS ((cpp_reader *, cpp_num, cpp_num,
enum cpp_ttype));
static cpp_num num_lshift PARAMS ((cpp_num, size_t, size_t));
......@@ -631,60 +630,54 @@ The parser assumes all shifted operators require a left operand unless
the flag NO_L_OPERAND is set. These semantics are automatic; any
extra semantics need to be handled with operator-specific code. */
/* Flags. */
/* Flags. ALWAYS_EVAL is for operators that should be evaluated even
if skip_eval is true; perhaps they are invalid and require a
diagnostic, or they might modify skip_eval. */
#define NO_L_OPERAND (1 << 0)
#define LEFT_ASSOC (1 << 1)
#define ALWAYS_EVAL (1 << 2)
/* Arity. */
#define UNARY (1 << 0)
#define BINARY (1 << 1)
#define OTHER (1 << 2)
typedef cpp_num (*binary_handler) PARAMS ((cpp_reader *, cpp_num, cpp_num,
enum cpp_ttype));
/* Operator to priority map. Must be in the same order as the first
N entries of enum cpp_ttype. */
static const struct operator
{
uchar prio;
uchar flags;
uchar arity;
binary_handler handler;
} optab[] =
{
/* EQ */ {0, 0, OTHER, NULL}, /* Shouldn't happen. */
/* NOT */ {16, NO_L_OPERAND, UNARY, NULL},
/* GREATER */ {12, LEFT_ASSOC, BINARY, num_inequality_op},
/* LESS */ {12, LEFT_ASSOC, BINARY, num_inequality_op},
/* PLUS */ {14, LEFT_ASSOC, BINARY, num_binary_op},
/* MINUS */ {14, LEFT_ASSOC, BINARY, num_binary_op},
/* MULT */ {15, LEFT_ASSOC, BINARY, num_mul},
/* DIV */ {15, LEFT_ASSOC, BINARY, num_div_op},
/* MOD */ {15, LEFT_ASSOC, BINARY, num_div_op},
/* AND */ {9, LEFT_ASSOC, BINARY, num_bitwise_op},
/* OR */ {7, LEFT_ASSOC, BINARY, num_bitwise_op},
/* XOR */ {8, LEFT_ASSOC, BINARY, num_bitwise_op},
/* RSHIFT */ {13, LEFT_ASSOC, BINARY, num_binary_op},
/* LSHIFT */ {13, LEFT_ASSOC, BINARY, num_binary_op},
/* MIN */ {10, LEFT_ASSOC, BINARY, num_binary_op},
/* MAX */ {10, LEFT_ASSOC, BINARY, num_binary_op},
/* COMPL */ {16, NO_L_OPERAND, UNARY, NULL},
/* AND_AND */ {6, LEFT_ASSOC, OTHER, NULL},
/* OR_OR */ {5, LEFT_ASSOC, OTHER, NULL},
/* QUERY */ {3, 0, OTHER, NULL},
/* COLON */ {4, LEFT_ASSOC, OTHER, NULL},
/* COMMA */ {2, LEFT_ASSOC, BINARY, num_binary_op},
/* OPEN_PAREN */ {1, NO_L_OPERAND, OTHER, NULL},
/* CLOSE_PAREN */ {0, 0, OTHER, NULL},
/* EOF */ {0, 0, OTHER, NULL},
/* EQ_EQ */ {11, LEFT_ASSOC, BINARY, num_equality_op},
/* NOT_EQ */ {11, LEFT_ASSOC, BINARY, num_equality_op},
/* GREATER_EQ */ {12, LEFT_ASSOC, BINARY, num_inequality_op},
/* LESS_EQ */ {12, LEFT_ASSOC, BINARY, num_inequality_op},
/* UPLUS */ {16, NO_L_OPERAND, UNARY, NULL},
/* UMINUS */ {16, NO_L_OPERAND, UNARY, NULL}
/* EQ */ {0, 0}, /* Shouldn't happen. */
/* NOT */ {16, NO_L_OPERAND},
/* GREATER */ {12, LEFT_ASSOC},
/* LESS */ {12, LEFT_ASSOC},
/* PLUS */ {14, LEFT_ASSOC},
/* MINUS */ {14, LEFT_ASSOC},
/* MULT */ {15, LEFT_ASSOC},
/* DIV */ {15, LEFT_ASSOC},
/* MOD */ {15, LEFT_ASSOC},
/* AND */ {9, LEFT_ASSOC},
/* OR */ {7, LEFT_ASSOC},
/* XOR */ {8, LEFT_ASSOC},
/* RSHIFT */ {13, LEFT_ASSOC},
/* LSHIFT */ {13, LEFT_ASSOC},
/* MIN */ {10, LEFT_ASSOC},
/* MAX */ {10, LEFT_ASSOC},
/* COMPL */ {16, NO_L_OPERAND},
/* AND_AND */ {6, LEFT_ASSOC | ALWAYS_EVAL},
/* OR_OR */ {5, LEFT_ASSOC | ALWAYS_EVAL},
/* QUERY */ {3, ALWAYS_EVAL},
/* COLON */ {4, LEFT_ASSOC | ALWAYS_EVAL},
/* COMMA */ {2, LEFT_ASSOC},
/* OPEN_PAREN */ {1, NO_L_OPERAND | ALWAYS_EVAL},
/* CLOSE_PAREN */ {0, 0},
/* EOF */ {0, 0},
/* EQ_EQ */ {11, LEFT_ASSOC},
/* NOT_EQ */ {11, LEFT_ASSOC},
/* GREATER_EQ */ {12, LEFT_ASSOC},
/* LESS_EQ */ {12, LEFT_ASSOC},
/* UPLUS */ {16, NO_L_OPERAND},
/* UMINUS */ {16, NO_L_OPERAND}
};
/* Parse and evaluate a C expression, reading from PFILE.
......@@ -870,70 +863,112 @@ reduce (pfile, top, op)
prio = optab[op].prio - ((optab[op].flags & LEFT_ASSOC) != 0);
while (prio < optab[top->op].prio)
{
if (optab[top->op].arity == UNARY)
{
if (!pfile->state.skip_eval)
if (!pfile->state.skip_eval || optab[top->op].flags & ALWAYS_EVAL)
switch (top->op)
{
case CPP_UPLUS:
case CPP_UMINUS:
case CPP_NOT:
case CPP_COMPL:
top[-1].value = num_unary_op (pfile, top->value, top->op);
top--;
}
else if (optab[top->op].arity == BINARY)
{
if (!pfile->state.skip_eval)
top[-1].value = (* (binary_handler) optab[top->op].handler)
(pfile, top[-1].value, top->value, top->op);
top--;
}
/* Anything changing skip_eval has to be handled here. */
else switch (top--->op)
{
case CPP_OR_OR:
if (!num_zerop (top->value))
pfile->state.skip_eval--;
top->value.low = !num_zerop (top->value) || !num_zerop (top[1].value);
top->value.high = 0;
top->value.unsignedp = false;
top->value.overflow = false;
break;
break;
case CPP_AND_AND:
if (num_zerop (top->value))
pfile->state.skip_eval--;
top->value.low = !num_zerop (top->value) && !num_zerop (top[1].value);
top->value.high = 0;
top->value.unsignedp = false;
top->value.overflow = false;
break;
case CPP_PLUS:
case CPP_MINUS:
case CPP_RSHIFT:
case CPP_LSHIFT:
case CPP_MIN:
case CPP_MAX:
case CPP_COMMA:
top[-1].value = num_binary_op (pfile, top[-1].value,
top->value, top->op);
break;
case CPP_OPEN_PAREN:
if (op != CPP_CLOSE_PAREN)
{
cpp_error (pfile, DL_ERROR, "missing ')' in expression");
return 0;
}
top->value = top[1].value;
return top;
case CPP_GREATER:
case CPP_LESS:
case CPP_GREATER_EQ:
case CPP_LESS_EQ:
top[-1].value
= num_inequality_op (pfile, top[-1].value, top->value, top->op);
break;
case CPP_COLON:
top--;
if (!num_zerop (top->value))
{
pfile->state.skip_eval--;
top->value = top[1].value;
}
else
top->value = top[2].value;
top->value.unsignedp = (top[1].value.unsignedp
|| top[2].value.unsignedp);
break;
case CPP_EQ_EQ:
case CPP_NOT_EQ:
top[-1].value
= num_equality_op (pfile, top[-1].value, top->value, top->op);
break;
case CPP_QUERY:
cpp_error (pfile, DL_ERROR, "'?' without following ':'");
return 0;
case CPP_AND:
case CPP_OR:
case CPP_XOR:
top[-1].value
= num_bitwise_op (pfile, top[-1].value, top->value, top->op);
break;
default:
goto bad_op;
}
case CPP_MULT:
top[-1].value = num_mul (pfile, top[-1].value, top->value);
break;
case CPP_DIV:
case CPP_MOD:
top[-1].value = num_div_op (pfile, top[-1].value,
top->value, top->op);
break;
case CPP_OR_OR:
top--;
if (!num_zerop (top->value))
pfile->state.skip_eval--;
top->value.low = (!num_zerop (top->value)
|| !num_zerop (top[1].value));
top->value.high = 0;
top->value.unsignedp = false;
top->value.overflow = false;
continue;
case CPP_AND_AND:
top--;
if (num_zerop (top->value))
pfile->state.skip_eval--;
top->value.low = (!num_zerop (top->value)
&& !num_zerop (top[1].value));
top->value.high = 0;
top->value.unsignedp = false;
top->value.overflow = false;
continue;
case CPP_OPEN_PAREN:
if (op != CPP_CLOSE_PAREN)
{
cpp_error (pfile, DL_ERROR, "missing ')' in expression");
return 0;
}
top--;
top->value = top[1].value;
return top;
case CPP_COLON:
top -= 2;
if (!num_zerop (top->value))
{
pfile->state.skip_eval--;
top->value = top[1].value;
}
else
top->value = top[2].value;
top->value.unsignedp = (top[1].value.unsignedp
|| top[2].value.unsignedp);
continue;
case CPP_QUERY:
cpp_error (pfile, DL_ERROR, "'?' without following ':'");
return 0;
default:
goto bad_op;
}
top--;
if (top->value.overflow && !pfile->state.skip_eval)
cpp_error (pfile, DL_PEDWARN,
"integer overflow in preprocessor expression");
......@@ -1383,10 +1418,9 @@ num_part_mul (lhs, rhs)
/* Multiply two preprocessing numbers. */
static cpp_num
num_mul (pfile, lhs, rhs, op)
num_mul (pfile, lhs, rhs)
cpp_reader *pfile;
cpp_num lhs, rhs;
enum cpp_ttype op ATTRIBUTE_UNUSED;
{
cpp_num result, temp;
bool unsignedp = lhs.unsignedp || rhs.unsignedp;
......
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