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| author | Jakub Jelinek <jakub@redhat.com> | 2019-05-31 09:53:48 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2019-05-31 09:53:48 +0200 |
| commit | 6992d6fbf2ffdb4a5c78604fbf33ae95956fffdd (patch) | |
| tree | 60a8f12d775717b56975226f009fb27e15718573 /gcc/tree-ssa-threadupdate.c | |
| parent | 0eee8eaa834181720cfb4e360a1c69d77c74b552 (diff) | |
| download | gcc-6992d6fbf2ffdb4a5c78604fbf33ae95956fffdd.zip gcc-6992d6fbf2ffdb4a5c78604fbf33ae95956fffdd.tar.gz gcc-6992d6fbf2ffdb4a5c78604fbf33ae95956fffdd.tar.bz2 | |
re PR tree-optimization/90671 (ICE on valid code at -Os and above with -g enabled in gsi_split_seq_after, at gimple-iterator.c:345)
PR tree-optimization/90671
* tree-ssa-threadupdate.c (ssa_create_duplicates): If
template_block used to be empty on the first call, don't use
gsi_split_seq_after and gsi_insert_seq_after, but remember whole
seq with bb_seq and set it with set_bb_seq.
* gcc.dg/torture/pr90671.c: New test.
From-SVN: r271802
Diffstat (limited to 'gcc/tree-ssa-threadupdate.c')
| -rw-r--r-- | gcc/tree-ssa-threadupdate.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c index d631543..a56ccfb 100644 --- a/gcc/tree-ssa-threadupdate.c +++ b/gcc/tree-ssa-threadupdate.c @@ -1142,12 +1142,25 @@ ssa_create_duplicates (struct redirection_data **slot, gimple_seq seq = NULL; if (gsi_stmt (local_info->template_last_to_copy) != gsi_stmt (gsi_last_bb (local_info->template_block))) - seq = gsi_split_seq_after (local_info->template_last_to_copy); + { + if (gsi_end_p (local_info->template_last_to_copy)) + { + seq = bb_seq (local_info->template_block); + set_bb_seq (local_info->template_block, NULL); + } + else + seq = gsi_split_seq_after (local_info->template_last_to_copy); + } create_block_for_threading (local_info->template_block, rd, 0, &local_info->duplicate_blocks); if (seq) - gsi_insert_seq_after (&local_info->template_last_to_copy, - seq, GSI_SAME_STMT); + { + if (gsi_end_p (local_info->template_last_to_copy)) + set_bb_seq (local_info->template_block, seq); + else + gsi_insert_seq_after (&local_info->template_last_to_copy, + seq, GSI_SAME_STMT); + } /* Go ahead and wire up outgoing edges and update PHIs for the duplicate block. */ |