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| author | Andrew Haley <aph@redhat.com> | 2006-07-17 13:14:38 +0000 |
|---|---|---|
| committer | Andrew Haley <aph@gcc.gnu.org> | 2006-07-17 13:14:38 +0000 |
| commit | 9d335249c9fe3535dfbb0af94617d32890d74702 (patch) | |
| tree | 5acb9fdfd81d8a472fa93bbc16a1bc890b6adc3f /gcc/tree-cfgcleanup.c | |
| parent | 2b65dae54e6e0eb0a30d645d516a7006d50e321b (diff) | |
| download | gcc-9d335249c9fe3535dfbb0af94617d32890d74702.zip gcc-9d335249c9fe3535dfbb0af94617d32890d74702.tar.gz gcc-9d335249c9fe3535dfbb0af94617d32890d74702.tar.bz2 | |
re PR tree-optimization/19505 (java bytecode to native ICE in remove_unreachable_regions)
2006-07-13 Andrew Haley <aph@redhat.com>
PR tree-optimization/19505
* tree-cfgcleanup.c (tree_forwarder_block_p): If we have an EH
edge leaving this block, make sure that the destination of this
block has only one predecessor.
From-SVN: r115518
Diffstat (limited to 'gcc/tree-cfgcleanup.c')
| -rw-r--r-- | gcc/tree-cfgcleanup.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/tree-cfgcleanup.c b/gcc/tree-cfgcleanup.c index ab452c4..be90209 100644 --- a/gcc/tree-cfgcleanup.c +++ b/gcc/tree-cfgcleanup.c @@ -239,6 +239,9 @@ static bool tree_forwarder_block_p (basic_block bb, bool phi_wanted) { block_stmt_iterator bsi; + edge_iterator ei; + edge e, succ; + basic_block dest; /* BB must have a single outgoing edge. */ if (single_succ_p (bb) != 1 @@ -290,6 +293,22 @@ tree_forwarder_block_p (basic_block bb, bool phi_wanted) return false; } + /* If we have an EH edge leaving this block, make sure that the + destination of this block has only one predecessor. This ensures + that we don't get into the situation where we try to remove two + forwarders that go to the same basic block but are handlers for + different EH regions. */ + succ = single_succ_edge (bb); + dest = succ->dest; + FOR_EACH_EDGE (e, ei, bb->preds) + { + if (e->flags & EDGE_EH) + { + if (!single_pred_p (dest)) + return false; + } + } + return true; } |