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re PR rtl-optimization/10116 (ce2: invalid merge of "join_bb" in the context of switch statements)

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PR opt/10116
        * ifcvt.c (find_if_block): Disallow tablejump insns outgoing
        from then_bb or else_bb after flow2.

From-SVN: r64750
This commit is contained in:
Richard Henderson 2003-03-23 12:14:57 -08:00 committed by Richard Henderson
parent 62c9aa5f9e
commit bd2eae1880
2 changed files with 10 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2003-03-23 Richard Henderson <rth@redhat.com>
PR opt/10116
* ifcvt.c (find_if_block): Disallow tablejump insns outgoing
from then_bb or else_bb after flow2.
2003-03-23 Zack Weinberg <zack@codesourcery.com>
* configure.in: Check whether it is necessary to link against

6
gcc/ifcvt.c
View File

@ -2365,7 +2365,8 @@ find_if_block (ce_info)
/* The THEN block of an IF-THEN combo must have zero or one successors. */
if (then_succ != NULL_EDGE
&& (then_succ->succ_next != NULL_EDGE
|| (then_succ->flags & EDGE_COMPLEX)))
|| (then_succ->flags & EDGE_COMPLEX)
|| (flow2_completed && tablejump_p (then_bb->end, NULL, NULL))))
return FALSE;
/* If the THEN block has no successors, conditional execution can still
@ -2412,7 +2413,8 @@ find_if_block (ce_info)
&& then_succ->dest == else_succ->dest
&& else_bb->pred->pred_next == NULL_EDGE
&& else_succ->succ_next == NULL_EDGE
&& ! (else_succ->flags & EDGE_COMPLEX))
&& ! (else_succ->flags & EDGE_COMPLEX)
&& ! (flow2_completed && tablejump_p (else_bb->end, NULL, NULL)))
join_bb = else_succ->dest;
/* Otherwise it is not an IF-THEN or IF-THEN-ELSE combination. */