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re PR tree-optimization/50389 (ICE: in execute_todo, at passes.c:1730 with -O -freorder-blocks -ftracer and __builtin___memcpy_chk())

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2011-10-10  Richard Guenther  <rguenther@suse.de>

	PR middle-end/50389
	* gimple-fold.c (gimplify_and_update_call_from_tree): Do not
	mark symbols for renaming.  Append the VUSE to all statements
	that possibly can have one.

	* gcc.dg/torture/pr50389.c: New testcase.

From-SVN: r179757
This commit is contained in:
Richard Guenther 2011-10-10 15:45:53 +00:00 committed by Richard Biener
parent 40b6510f2e
commit a24ac4609a
4 changed files with 31 additions and 7 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2011-10-10 Richard Guenther <rguenther@suse.de>
PR middle-end/50389
* gimple-fold.c (gimplify_and_update_call_from_tree): Do not
mark symbols for renaming. Append the VUSE to all statements
that possibly can have one.
2011-10-10 Richard Guenther <rguenther@suse.de>
* ipa-split.c (pass_split_functions): Add verification TODOs.

11
gcc/gimple-fold.c
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@ -588,13 +588,10 @@ gimplify_and_update_call_from_tree (gimple_stmt_iterator *si_p, tree expr)
}
new_stmt = gsi_stmt (i);
if (gimple_in_ssa_p (cfun))
{
find_new_referenced_vars (new_stmt);
mark_symbols_for_renaming (new_stmt);
}
/* If the new statement has a VUSE, update it with exact SSA name we
know will reach this one. */
if (gimple_vuse (new_stmt))
find_new_referenced_vars (new_stmt);
/* If the new statement possibly has a VUSE, update it with exact SSA
name we know will reach this one. */
if (gimple_has_mem_ops (new_stmt))
{
/* If we've also seen a previous store create a new VDEF for
the latter one, and make that the new reaching VUSE. */

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2011-10-10 Richard Guenther <rguenther@suse.de>
PR middle-end/50389
* gcc.dg/torture/pr50389.c: New testcase.
2011-10-10 Richard Guenther <rguenther@suse.de>
PR middle-end/50195

15
gcc/testsuite/gcc.dg/torture/pr50389.c Normal file
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@ -0,0 +1,15 @@
/* { dg-do compile } */
/* { dg-options "-freorder-blocks -ftracer" } */
extern int data[];
extern int i;
void
foo (void)
{
char buf[8];
__builtin___memcpy_chk (buf, data, i ? 8 : 4,
__builtin_object_size (buf, 0));
__builtin___memcpy_chk (buf, data, i ? 8 : 4,
__builtin_object_size (buf, 0));
}