------- Comment #9 from rakdver at kam dot mff dot cuni dot cz 2007-07-28
19:27 -------
Subject: Re: Bootstrap with vectorization enabled fails with ICE on PPC
> > v0 (and v10 are scratch registers and not saved.
>
> so does it look like a register allocation bug then?
not really; it seems like a md problem (the registers v0-v19
are not marked as call clobbered); the patch below should
fix the problem.
Index: testsuite/gcc.dg/pr32582.c
===================================================================
*** testsuite/gcc.dg/pr32582.c (revision 0)
--- testsuite/gcc.dg/pr32582.c (revision 0)
***************
*** 0 ****
--- 1,32 ----
+ /* { dg-do run { target { powerpc*-*-* && powerpc_altivec_ok } } } */
+ /* { dg-options "-O2 -ftree-vectorize -maltivec" } */
+
+ #include <stdlib.h>
+ #include <string.h>
+
+ char a[64];
+
+ void set (void)
+ {
+ int i;
+
+ for (i = 0; i < 64; i++)
+ a[i] = 'x';
+ }
+
+ void check (void)
+ {
+ int i;
+
+ for (i = 0; i < 64; i++)
+ if (a[i] != 0)
+ abort ();
+ }
+
+ int main (void)
+ {
+ set ();
+ memset (a, 0, sizeof a);
+ check ();
+ return 0;
+ }
Index: config/rs6000/rs6000.h
===================================================================
*** config/rs6000/rs6000.h (revision 126932)
--- config/rs6000/rs6000.h (working copy)
*************** extern enum rs6000_nop_insertion rs6000_
*** 699,706 ****
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, \
/* AltiVec registers. */ \
! 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
! 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1, 1 \
, 1, 1, 1 \
}
--- 699,706 ----
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, \
/* AltiVec registers. */ \
! 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
! 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1, 1 \
, 1, 1, 1 \
}
*************** extern enum rs6000_nop_insertion rs6000_
*** 718,725 ****
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, \
/* AltiVec registers. */ \
! 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
! 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0 \
, 0, 0, 0 \
}
--- 718,725 ----
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, \
/* AltiVec registers. */ \
! 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
! 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
0, 0 \
, 0, 0, 0 \
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32582
