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re PR tree-optimization/46165 (ICE: verify_flow_info failed when casting-out attribute noreturn with -fno-tree-ccp -fno-tree-copy-prop -fno-tree-dce)

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PR tree-optimization/46165
	* tree-ssa-pre.c (eliminate): Return TODO_cleanup_cfg if changing
	a normal call into noreturn call.

	* gcc.dg/pr46165.c: New test.

From-SVN: r166236
This commit is contained in:
Jakub Jelinek 2010-11-03 11:34:34 +01:00 committed by Jakub Jelinek
parent ca818bd905
commit 87c20fe762
4 changed files with 28 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-11-03 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/46165
* tree-ssa-pre.c (eliminate): Return TODO_cleanup_cfg if changing
a normal call into noreturn call.
2010-11-03 Richard Guenther <rguenther@suse.de>
PR middle-end/46251

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-11-03 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/46165
* gcc.dg/pr46165.c: New test.
2010-11-03 Richard Guenther <rguenther@suse.de>
PR middle-end/46251

11
gcc/testsuite/gcc.dg/pr46165.c Normal file
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@ -0,0 +1,11 @@
/* PR tree-optimization/46165 */
/* { dg-do compile } */
/* { dg-options "-O -fno-tree-ccp -fno-tree-copy-prop -fno-tree-dce" } */
extern void foo (void) __attribute__((noreturn));
void
g (void)
{
void (*f) (void) = foo;
f ();
}

6
gcc/tree-ssa-pre.c
View File

@ -4364,6 +4364,7 @@ eliminate (void)
{
bool can_make_abnormal_goto
= stmt_can_make_abnormal_goto (stmt);
bool was_noreturn = gimple_call_noreturn_p (stmt);
if (dump_file && (dump_flags & TDF_DETAILS))
{
@ -4376,6 +4377,11 @@ eliminate (void)
gimple_call_set_fn (stmt, fn);
update_stmt (stmt);
/* When changing a call into a noreturn call, cfg cleanup
is needed to fix up the noreturn call. */
if (!was_noreturn && gimple_call_noreturn_p (stmt))
todo |= TODO_cleanup_cfg;
/* If we removed EH side-effects from the statement, clean
its EH information. */
if (maybe_clean_or_replace_eh_stmt (stmt, stmt))