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tree-cfg.c (tree_verify_flow_info): Make sure that labels in SWITCH_LABELS are always sorted.

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* tree-cfg.c (tree_verify_flow_info): Make sure that labels in
	SWITCH_LABELS are always sorted.

From-SVN: r82683
This commit is contained in:
Steven Bosscher 2004-06-07 06:11:59 +00:00 committed by Steven Bosscher
parent e4638a72d8
commit 7853504d63
2 changed files with 34 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-06-06 Steven Bosscher <stevenb@suse.de>
* tree-cfg.c (tree_verify_flow_info): Make sure that labels in
SWITCH_LABELS are always sorted.
2004-06-06 Steven Bosscher <stevenb@suse.de> 2004-06-06 Steven Bosscher <stevenb@suse.de>
* hooks.c (hook_int_void_1): New generic hook. * hooks.c (hook_int_void_1): New generic hook.

29
gcc/tree-cfg.c
View File

@ -3631,6 +3631,7 @@ tree_verify_flow_info (void)
case SWITCH_EXPR: case SWITCH_EXPR:
{ {
tree prev;
edge e; edge e;
size_t i, n; size_t i, n;
tree vec; tree vec;
@ -3649,6 +3650,34 @@ tree_verify_flow_info (void)
label_bb->aux = (void *)1; label_bb->aux = (void *)1;
} }
/* Verify that the case labels are sorted. */
prev = TREE_VEC_ELT (vec, 0);
for (i = 1; i < n - 1; ++i)
{
tree c = TREE_VEC_ELT (vec, i);
if (! CASE_LOW (c))
{
error ("Found default case not at end of case vector");
err = 1;
continue;
}
if (! tree_int_cst_lt (CASE_LOW (prev), CASE_LOW (c)))
{
error ("Case labels not sorted:\n ");
print_generic_expr (stderr, prev, 0);
fprintf (stderr," is greater than ");
print_generic_expr (stderr, c, 0);
fprintf (stderr," but comes before it.\n");
err = 1;
}
prev = c;
}
if (CASE_LOW (TREE_VEC_ELT (vec, n - 1)))
{
error ("No default case found at end of case vector");
err = 1;
}
for (e = bb->succ; e; e = e->succ_next) for (e = bb->succ; e; e = e->succ_next)
{ {
if (!e->dest->aux) if (!e->dest->aux)