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Diffstat (limited to 'gcc/tree-ssa-threadbackward.c')
| -rw-r--r-- | gcc/tree-ssa-threadbackward.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/tree-ssa-threadbackward.c b/gcc/tree-ssa-threadbackward.c index 6f1b757..88f8d5e 100644 --- a/gcc/tree-ssa-threadbackward.c +++ b/gcc/tree-ssa-threadbackward.c @@ -385,6 +385,16 @@ fsm_find_control_statement_thread_paths (tree name, We have to know the outgoing edge to figure this out. */ edge taken_edge = find_taken_edge ((*path)[0], arg); + + /* There are cases where we may not be able to extract the + taken edge. For example, a computed goto to an absolute + address. Handle those cases gracefully. */ + if (taken_edge == NULL) + { + path->pop (); + continue; + } + bool creates_irreducible_loop = false; if (threaded_through_latch && loop == taken_edge->dest->loop_father |