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alias.c (find_base_term, get_addr): Do not dereference NULL pointer when all VALUE's locations has been invalidated.

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* alias.c (find_base_term, get_addr):  Do not dereference NULL
	pointer when all VALUE's locations has been invalidated.
	(rtx_equal_for_memref_p): Simplify checking of VALUEs.

From-SVN: r77201
This commit is contained in:
Jan Hubicka 2004-02-04 00:53:48 +01:00 committed by Jan Hubicka
parent 1c02f6f2d2
commit 40e02b4a76
2 changed files with 20 additions and 11 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2004-02-04 Jan Hubicka <jh@suse.cz>
* alias.c (find_base_term, get_addr): Do not dereference NULL
pointer when all VALUE's locations has been invalidated.
(rtx_equal_for_memref_p): Simplify checking of VALUEs.
2004-02-03 Wolfgang Bangerth <bangerth@dealii.org>
* doc/invoke.texi (x86 options): Fix spelling/wording.

25
gcc/alias.c
View File

@ -1139,9 +1139,6 @@ rtx_equal_for_memref_p (rtx x, rtx y)
/* Some RTL can be compared without a recursive examination. */
switch (code)
{
case VALUE:
return CSELIB_VAL_PTR (x) == CSELIB_VAL_PTR (y);
case REG:
return REGNO (x) == REGNO (y);
@ -1151,6 +1148,7 @@ rtx_equal_for_memref_p (rtx x, rtx y)
case SYMBOL_REF:
return XSTR (x, 0) == XSTR (y, 0);
case VALUE:
case CONST_INT:
case CONST_DOUBLE:
/* There's no need to compare the contents of CONST_DOUBLEs or
@ -1325,6 +1323,8 @@ find_base_term (rtx x)
case VALUE:
val = CSELIB_VAL_PTR (x);
if (!val)
return 0;
for (l = val->locs; l; l = l->next)
if ((x = find_base_term (l->loc)) != 0)
return x;
@ -1502,14 +1502,17 @@ get_addr (rtx x)
if (GET_CODE (x) != VALUE)
return x;
v = CSELIB_VAL_PTR (x);
for (l = v->locs; l; l = l->next)
if (CONSTANT_P (l->loc))
return l->loc;
for (l = v->locs; l; l = l->next)
if (GET_CODE (l->loc) != REG && GET_CODE (l->loc) != MEM)
return l->loc;
if (v->locs)
return v->locs->loc;
if (v)
{
for (l = v->locs; l; l = l->next)
if (CONSTANT_P (l->loc))
return l->loc;
for (l = v->locs; l; l = l->next)
if (GET_CODE (l->loc) != REG && GET_CODE (l->loc) != MEM)
return l->loc;
if (v->locs)
return v->locs->loc;
}
return x;
}