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re PR middle-end/28071 (A file that can not be compiled in reasonable time/space)

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PR rtl-optimization/28071
	* tree-cfg.c (tree_split_block): Do not allocate new stmt_list nodes.
	* tree-iterator.c (tsi_split_statement_list_before): Do not crash when
	splitting before first stmt.

From-SVN: r115713
This commit is contained in:
Jan Hubicka 2006-07-24 13:27:53 +02:00 committed by Jan Hubicka
parent f10d1a747d
commit 597ae07482
3 changed files with 22 additions and 9 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2006-07-24 Jan Hubicka <jh@suse.cz>
PR rtl-optimization/28071
* tree-cfg.c (tree_split_block): Do not allocate new stmt_list nodes.
* tree-iterator.c (tsi_split_statement_list_before): Do not crash when
splitting before first stmt.
2006-07-24 Jan Hubicka <jh@suse.cz>
PR rtl-optimization/28071

21
gcc/tree-cfg.c
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@ -4158,7 +4158,8 @@ tree_redirect_edge_and_branch_force (edge e, basic_block dest)
static basic_block
tree_split_block (basic_block bb, void *stmt)
{
block_stmt_iterator bsi, bsi_tgt;
block_stmt_iterator bsi;
tree_stmt_iterator tsi_tgt;
tree act;
basic_block new_bb;
edge e;
@ -4192,13 +4193,17 @@ tree_split_block (basic_block bb, void *stmt)
}
}
bsi_tgt = bsi_start (new_bb);
while (!bsi_end_p (bsi))
{
act = bsi_stmt (bsi);
bsi_remove (&bsi, false);
bsi_insert_after (&bsi_tgt, act, BSI_NEW_STMT);
}
if (bsi_end_p (bsi))
return new_bb;
/* Split the statement list - avoid re-creating new containers as this
brings ugly quadratic memory consumption in the inliner.
(We are still quadratic since we need to update stmt BB pointers,
sadly.) */
new_bb->stmt_list = tsi_split_statement_list_before (&bsi.tsi);
for (tsi_tgt = tsi_start (new_bb->stmt_list);
!tsi_end_p (tsi_tgt); tsi_next (&tsi_tgt))
set_bb_for_stmt (tsi_stmt (tsi_tgt), new_bb);
return new_bb;
}

3
gcc/tree-iterator.c
View File

@ -289,7 +289,8 @@ tsi_split_statement_list_before (tree_stmt_iterator *i)
STATEMENT_LIST_TAIL (new_sl) = STATEMENT_LIST_TAIL (old_sl);
STATEMENT_LIST_TAIL (old_sl) = prev;
cur->prev = NULL;
prev->next = NULL;
if (prev)
prev->next = NULL;
return new_sl;
}