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unroll.c (find_splittable_givs): For a DEST_ADDR giv...

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* unroll.c (find_splittable_givs): For a DEST_ADDR giv, do not share
        a register with another DEST_ADDR giv if the address is not valid.

From-SVN: r24673
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Jeffrey A Law 1999-01-15 01:53:08 +00:00 committed by Jeff Law
parent 41b6ea681b
commit f387b2e4ff
2 changed files with 8 additions and 2 deletions
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3
gcc/ChangeLog
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@ -1,5 +1,8 @@
Thu Jan 14 22:38:41 1999 Jeffrey A Law (law@cygnus.com)
* unroll.c (find_splittable_givs): For a DEST_ADDR giv, do not share
a register with another DEST_ADDR giv if the address is not valid.
* pa.c (hppa_expand_epilogue): Save and restore the static chain
around the call to mcount.

7
gcc/unroll.c
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@ -2847,8 +2847,11 @@ find_splittable_givs (bl, unroll_type, loop_start, loop_end, increment,
To share a register here, the values must be
equal. */
&& rtx_equal_p (v->same->mult_val, v->mult_val)
&& rtx_equal_p (v->same->add_val, v->add_val))
&& rtx_equal_p (v->same->add_val, v->add_val)
/* If the memory references have different modes,
then the address may not be valid and we must
not share registers. */
&& verify_addresses (v, giv_inc, unroll_number))
{
v->dest_reg = v->same->dest_reg;
v->shared = 1;