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Some cselib bug fixes

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From-SVN: r32589
This commit is contained in:
Bernd Schmidt 2000-03-16 17:13:49 +00:00 • committed by Bernd Schmidt
parent d9f3242265
commit 22eb7dfafe
2 changed files with 18 additions and 6 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2000-03-16 Bernd Schmidt <bernds@cygnus.co.uk>
* simplify-rtx.c (hash_rtx, case MEM/REG): Take into account that
HASH may already be nonzero. Add code/mode into hash value
immediately after repeat label.
(cselib_lookup): Don't leave the hash table in an inconsistent
state before a hash lookup operation.
Thu Mar 16 17:03:10 MET 2000 Jan Hubicka <jh@suse.cz>
* i386.md (all HI and QI mode non-move patterns): Conditionize

16
gcc/simplify-rtx.c
View file

@ -2435,14 +2435,15 @@ hash_rtx (x, mode, create)
{
cselib_val *e;
int i, j;
enum rtx_code code;
const char *fmt;
unsigned int hash = 0;
enum rtx_code code = GET_CODE (x);
const char *fmt = GET_RTX_FORMAT (code);
/* repeat is used to turn tail-recursion into iteration. */
repeat:
code = GET_CODE (x);
hash += (unsigned) code + (unsigned) GET_MODE (x);
switch (code)
{
case MEM:
@ -2450,7 +2451,8 @@ hash_rtx (x, mode, create)
e = cselib_lookup (x, GET_MODE (x), create);
if (! e)
return 0;
return e->value;
hash += e->value;
return hash;
case CONST_INT:
{
@ -2506,7 +2508,6 @@ hash_rtx (x, mode, create)
}
i = GET_RTX_LENGTH (code) - 1;
hash += (unsigned) code + (unsigned) GET_MODE (x);
fmt = GET_RTX_FORMAT (code);
for (; i >= 0; i--)
{
@ -2765,8 +2766,11 @@ cselib_lookup (x, mode, create)
return e;
e = new_cselib_val (hashval, mode);
e->locs = new_elt_loc_list (e->locs, cselib_subst_to_values (x));
/* We have to fill the slot before calling cselib_subst_to_values:
the hash table is inconsistent until we do so, and
cselib_subst_to_values will need to do lookups. */
*slot = (void *) e;
e->locs = new_elt_loc_list (e->locs, cselib_subst_to_values (x));
return e;
}