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* loop.c (combine_movables): Do allow combination of pseudos.

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From-SVN: r51581
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Dale Johannesen 2002-03-29 22:36:56 +00:00 committed by Richard Henderson
parent 5bebbee733
commit 02a566dcf0
2 changed files with 9 additions and 4 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2002-03-29 Dale Johannesen <dalej@apple.com>
* loop.c (combine_movables): Do allow combination of pseudos.
2002-03-29 Loren J. Rittle <ljrittle@acm.org>
* config.gcc (*-*-freebsd*): Enable creation of libgcc_s.so.

9
gcc/loop.c
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@ -1446,10 +1446,13 @@ combine_movables (movables, regs)
/* Regs that are set more than once are not allowed to match
or be matched. I'm no longer sure why not. */
/* Only pseudo registers are allowed to match or be matched,
since move_movables does not validate the change. */
/* Perhaps testing m->consec_sets would be more appropriate here? */
for (m = movables->head; m; m = m->next)
if (m->match == 0 && regs->array[m->regno].n_times_set == 1
&& m->regno >= FIRST_PSEUDO_REGISTER
&& !m->partial)
{
struct movable *m1;
@ -1461,11 +1464,9 @@ combine_movables (movables, regs)
/* We want later insns to match the first one. Don't make the first
one match any later ones. So start this loop at m->next. */
for (m1 = m->next; m1; m1 = m1->next)
/* ??? HACK! move_movables does not verify that the replacement
is valid, which can have disasterous effects with hard regs
and match_dup. Turn combination off for now. */
if (0 && m != m1 && m1->match == 0
if (m != m1 && m1->match == 0
&& regs->array[m1->regno].n_times_set == 1
&& m1->regno >= FIRST_PSEUDO_REGISTER
/* A reg used outside the loop mustn't be eliminated. */
&& !m1->global
/* A reg used for zero-extending mustn't be eliminated. */