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re PR middle-end/37943 ([graphite] ICE : in build_graphite_scops, at graphite.c:1823)

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2008-11-05  Tobias Grosser  <grosser@fim.uni-passau.de>

	PR middle-end/37943

	* graphite.c (scopdet_basic_block_info): Fix loops with multiple
	exits and conditions.
	* testsuite/gcc.dg/graphite/pr37943.c: New.

From-SVN: r141598
This commit is contained in:
Tobias Grosser 2008-11-05 04:45:49 +00:00 committed by Tobias Grosser
parent a28a65ec25
commit 58af97fcf8
3 changed files with 63 additions and 6 deletions
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8
ChangeLog
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@ -1,3 +1,11 @@
2008-11-05 Tobias Grosser <grosser@fim.uni-passau.de>
PR middle-end/37943
* graphite.c (scopdet_basic_block_info): Fix loops with multiple
exits and conditions.
* testsuite/gcc.dg/graphite/pr37943.c: New.
2008-11-04 Thomas Schwinge <tschwinge@gnu.org>
* MAINTAINERS (Write after approval): Add myself.

30
gcc/graphite.c
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@ -1326,11 +1326,29 @@ scopdet_basic_block_info (basic_block bb, VEC (sd_region, heap) **scops,
int i;
build_scops_1 (bb, &tmp_scops, loop);
/* XXX: Use 'e->src' ot better 'bb'? */
/* Start at all bbs dominated by a loop exit that only exists in this
loop. */
for (i = 0; VEC_iterate (edge, exits, i, e); i++)
if (dominated_by_p (CDI_DOMINATORS, e->dest, e->src)
&& e->src->loop_father == loop)
build_scops_1 (e->dest, &tmp_scops, e->dest->loop_father);
if (e->src->loop_father == loop)
{
VEC (basic_block, heap) *dominated;
basic_block b;
int j;
dominated = get_dominated_by (CDI_DOMINATORS, e->src);
for (j = 0; VEC_iterate (basic_block, dominated, j, b); j++)
/* Loop exit. */
if (loop_depth (find_common_loop (loop, b->loop_father))
< loop_depth (loop))
{
/* Pass loop_outer to recognize b as loop header in
build_scops_1. */
if (b->loop_father->header == b)
build_scops_1 (b, &tmp_scops, loop_outer (b->loop_father));
else
build_scops_1 (b, &tmp_scops, b->loop_father);
}
}
result.next = NULL;
result.last = NULL;
@ -1440,7 +1458,8 @@ scopdet_basic_block_info (basic_block bb, VEC (sd_region, heap) **scops,
for (i = 0; VEC_iterate (basic_block, dominated, i, dom_bb); i++)
{
/* Ignore loop exits: they will be handled after the loop body. */
if (is_loop_exit (loop, dom_bb))
if (loop_depth (find_common_loop (loop, dom_bb->loop_father))
< loop_depth (loop))
{
result.exits = true;
continue;
@ -1790,7 +1809,6 @@ create_sese_edges (VEC (sd_region, heap) *regions)
int i;
sd_region *s;
for (i = 0; VEC_iterate (sd_region, regions, i, s); i++)
create_single_entry_edge (s);

31
gcc/testsuite/gcc.dg/graphite/pr37943.c Normal file
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@ -0,0 +1,31 @@
/* { dg-options "-O3 -fgraphite-identity -fdump-tree-graphite-all" } */
typedef struct
{
int mode,state,num,state_out;
unsigned char* bits;
char *out;
}test;
unsigned char copy( test* s )
{
while(1)
{
if (s->mode == 0) break;
if (s->state_out >= s->num) break;
*(s->out) = s->bits[s->state_out];
if (s->mode == 0) s->mode++;
}
}
unsigned char compress(test *in)
{
unsigned char p_in, p_out;
while(1)
{
if (in->state == 1)
{
p_out |= copy(in);
if (in->state_out < in->num) break;
}
}
return p_in || p_out;