Skip to content

R
riscv-gcc-1
Commit ef835bb0 by Bernd Schmidt Committed by Bernd Schmidt
Options

Delete two unused functions 

From-SVN: r30526
parent 6d6ce8b2
Showing with 5 additions and 208 deletions
gcc/ChangeLog
Sun Nov 14 12:41:57 1999 Bernd Schmidt <bernds@cygnus.co.uk>
* cse.c (set_nonvarying_address_components): Delete unused function.
(refers_to_p): Likewise.
Fri Nov 12 20:53:22 1999 Jeffrey A Law (law@cygnus.com) Fri Nov 12 20:53:22 1999 Jeffrey A Law (law@cygnus.com)
* function.c (diddle_return_value): Set REG_FUNCTION_VALUE_P as * function.c (diddle_return_value): Set REG_FUNCTION_VALUE_P as
......
gcc/cse.c
...@@ -669,10 +669,6 @@ static rtx use_related_value PROTO((rtx, struct table_elt *)); ...@@ -669,10 +669,6 @@ static rtx use_related_value PROTO((rtx, struct table_elt *));
static unsigned canon_hash PROTO((rtx, enum machine_mode)); static unsigned canon_hash PROTO((rtx, enum machine_mode));
static unsigned safe_hash PROTO((rtx, enum machine_mode)); static unsigned safe_hash PROTO((rtx, enum machine_mode));
static int exp_equiv_p PROTO((rtx, rtx, int, int)); static int exp_equiv_p PROTO((rtx, rtx, int, int));
static void set_nonvarying_address_components PROTO((rtx, int, rtx *,
HOST_WIDE_INT *,
HOST_WIDE_INT *));
static int refers_to_p PROTO((rtx, rtx));
static rtx canon_reg PROTO((rtx, rtx)); static rtx canon_reg PROTO((rtx, rtx));
static void find_best_addr PROTO((rtx, rtx *)); static void find_best_addr PROTO((rtx, rtx *));
static enum rtx_code find_comparison_args PROTO((enum rtx_code, rtx *, rtx *, static enum rtx_code find_comparison_args PROTO((enum rtx_code, rtx *, rtx *,
...@@ -2455,210 +2451,6 @@ exp_equiv_p (x, y, validate, equal_values) ...@@ -2455,210 +2451,6 @@ exp_equiv_p (x, y, validate, equal_values)
return 1; return 1;
} }
/* Return 1 iff any subexpression of X matches Y.
Here we do not require that X or Y be valid (for registers referred to)
for being in the hash table. */
static int
refers_to_p (x, y)
rtx x, y;
{
register int i;
register enum rtx_code code;
register const char *fmt;
repeat:
if (x == y)
return 1;
if (x == 0 || y == 0)
return 0;
code = GET_CODE (x);
/* If X as a whole has the same code as Y, they may match.
If so, return 1. */
if (code == GET_CODE (y))
{
if (exp_equiv_p (x, y, 0, 1))
return 1;
}
/* X does not match, so try its subexpressions. */
fmt = GET_RTX_FORMAT (code);
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
if (fmt[i] == 'e')
{
if (i == 0)
{
x = XEXP (x, 0);
goto repeat;
}
else
if (refers_to_p (XEXP (x, i), y))
return 1;
}
else if (fmt[i] == 'E')
{
int j;
for (j = 0; j < XVECLEN (x, i); j++)
if (refers_to_p (XVECEXP (x, i, j), y))
return 1;
}
return 0;
}
/* Given ADDR and SIZE (a memory address, and the size of the memory reference),
set PBASE, PSTART, and PEND which correspond to the base of the address,
the starting offset, and ending offset respectively.
ADDR is known to be a nonvarying address. */
/* ??? Despite what the comments say, this function is in fact frequently
passed varying addresses. This does not appear to cause any problems. */
static void
set_nonvarying_address_components (addr, size, pbase, pstart, pend)
rtx addr;
int size;
rtx *pbase;
HOST_WIDE_INT *pstart, *pend;
{
rtx base;
HOST_WIDE_INT start, end;
base = addr;
start = 0;
end = 0;
if (flag_pic && GET_CODE (base) == PLUS
&& XEXP (base, 0) == pic_offset_table_rtx)
base = XEXP (base, 1);
/* Registers with nonvarying addresses usually have constant equivalents;
but the frame pointer register is also possible. */
if (GET_CODE (base) == REG
&& qty_const != 0
&& REGNO_QTY_VALID_P (REGNO (base))
&& qty_mode[REG_QTY (REGNO (base))] == GET_MODE (base)
&& qty_const[REG_QTY (REGNO (base))] != 0)
base = qty_const[REG_QTY (REGNO (base))];
else if (GET_CODE (base) == PLUS
&& GET_CODE (XEXP (base, 1)) == CONST_INT
&& GET_CODE (XEXP (base, 0)) == REG
&& qty_const != 0
&& REGNO_QTY_VALID_P (REGNO (XEXP (base, 0)))
&& (qty_mode[REG_QTY (REGNO (XEXP (base, 0)))]
== GET_MODE (XEXP (base, 0)))
&& qty_const[REG_QTY (REGNO (XEXP (base, 0)))])
{
start = INTVAL (XEXP (base, 1));
base = qty_const[REG_QTY (REGNO (XEXP (base, 0)))];
}
/* This can happen as the result of virtual register instantiation,
if the initial offset is too large to be a valid address. */
else if (GET_CODE (base) == PLUS
&& GET_CODE (XEXP (base, 0)) == REG
&& GET_CODE (XEXP (base, 1)) == REG
&& qty_const != 0
&& REGNO_QTY_VALID_P (REGNO (XEXP (base, 0)))
&& (qty_mode[REG_QTY (REGNO (XEXP (base, 0)))]
== GET_MODE (XEXP (base, 0)))
&& qty_const[REG_QTY (REGNO (XEXP (base, 0)))]
&& REGNO_QTY_VALID_P (REGNO (XEXP (base, 1)))
&& (qty_mode[REG_QTY (REGNO (XEXP (base, 1)))]
== GET_MODE (XEXP (base, 1)))
&& qty_const[REG_QTY (REGNO (XEXP (base, 1)))])
{
rtx tem = qty_const[REG_QTY (REGNO (XEXP (base, 1)))];
base = qty_const[REG_QTY (REGNO (XEXP (base, 0)))];
/* One of the two values must be a constant. */
if (GET_CODE (base) != CONST_INT)
{
if (GET_CODE (tem) != CONST_INT)
abort ();
start = INTVAL (tem);
}
else
{
start = INTVAL (base);
base = tem;
}
}
/* Handle everything that we can find inside an address that has been
viewed as constant. */
while (1)
{
/* If no part of this switch does a "continue", the code outside
will exit this loop. */
switch (GET_CODE (base))
{
case LO_SUM:
/* By definition, operand1 of a LO_SUM is the associated constant
address. Use the associated constant address as the base
instead. */
base = XEXP (base, 1);
continue;
case CONST:
/* Strip off CONST. */
base = XEXP (base, 0);
continue;
case PLUS:
if (GET_CODE (XEXP (base, 1)) == CONST_INT)
{
start += INTVAL (XEXP (base, 1));
base = XEXP (base, 0);
continue;
}
break;
case AND:
/* Handle the case of an AND which is the negative of a power of
two. This is used to represent unaligned memory operations. */
if (GET_CODE (XEXP (base, 1)) == CONST_INT
&& exact_log2 (- INTVAL (XEXP (base, 1))) > 0)
{
set_nonvarying_address_components (XEXP (base, 0), size,
pbase, pstart, pend);
/* Assume the worst misalignment. START is affected, but not
END, so compensate but adjusting SIZE. Don't lose any
constant we already had. */
size = *pend - *pstart - INTVAL (XEXP (base, 1)) - 1;
start += *pstart + INTVAL (XEXP (base, 1)) + 1;
end += *pend;
base = *pbase;
}
break;
default:
break;
}
break;
}
if (GET_CODE (base) == CONST_INT)
{
start += INTVAL (base);
base = const0_rtx;
}
end = start + size;
/* Set the return values. */
*pbase = base;
*pstart = start;
*pend = end;
}
/* Return 1 if X has a value that can vary even between two /* Return 1 if X has a value that can vary even between two
executions of the program. 0 means X can be compared reliably executions of the program. 0 means X can be compared reliably
against certain constants or near-constants. */ against certain constants or near-constants. */
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment