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re PR middle-end/45316 (ICE: verify_flow_info failed: BB 3 can not throw but has an EH edge with -O1 -ftree-pre -fnon-call-exceptions)

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2010-08-25  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/45316
	* tree-ssa-pre.c (eliminate): Properly clean EH info.

	* g++.dg/opt/pr45316.C: New testcase.

From-SVN: r163543
This commit is contained in:
Richard Guenther 2010-08-25 12:53:30 +00:00 committed by Richard Biener
parent 90bc1cb81b
commit a2c0ed2ee9
4 changed files with 41 additions and 0 deletions

5
gcc/ChangeLog

@ -1,3 +1,8 @@
2010-08-25 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45316
* tree-ssa-pre.c (eliminate): Properly clean EH info.
2010-08-25 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45393

5
gcc/testsuite/ChangeLog

@ -1,3 +1,8 @@
2010-08-25 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45316
* g++.dg/opt/pr45316.C: New testcase.
2010-08-25 Richard Guenther <rguenther@suse.de>
PR tree-optimization/45393

28
gcc/testsuite/g++.dg/opt/pr45316.C Normal file

@ -0,0 +1,28 @@
// { dg-do compile }
// { dg-options "-O1 -ftree-pre -fnon-call-exceptions" }
struct A
{
int i;
};
struct B : A
{
int i[6];
B (int = 0) : A ()
{
m ();
}
int m ();
};
struct C : B
{
};
void
foo ()
{
new C ();
}

3
gcc/tree-ssa-pre.c

@ -4498,9 +4498,12 @@ eliminate (void)
if (TREE_CODE (lhs) != SSA_NAME
|| has_zero_uses (lhs))
{
basic_block bb = gimple_bb (stmt);
gsi = gsi_for_stmt (stmt);
unlink_stmt_vdef (stmt);
gsi_remove (&gsi, true);
if (gimple_purge_dead_eh_edges (bb))
todo |= TODO_cleanup_cfg;
if (TREE_CODE (lhs) == SSA_NAME)
bitmap_clear_bit (inserted_exprs, SSA_NAME_VERSION (lhs));
release_defs (stmt);