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re PR tree-optimization/46137 (g++.dg/torture/pr45877.C FAILs with -fno-tree-dce)

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2010-10-22  Richard Guenther  <rguenther@suse.de>

	PR middle-end/46137
	* gimple-fold.c (gimplify_and_update_call_from_tree): Properly
	remove the virtual operands if they are not needed.

	* c-c++-common/torture/pr46137.c: New testcase.

From-SVN: r165852
This commit is contained in:
Richard Guenther 2010-10-22 19:03:39 +00:00 committed by Richard Biener
parent d8c801fdbe
commit 07db7d35a9
4 changed files with 31 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-10-22 Richard Guenther <rguenther@suse.de>
PR middle-end/46137
* gimple-fold.c (gimplify_and_update_call_from_tree): Properly
remove the virtual operands if they are not needed.
2010-10-22 Changpeng Fang <changpeng.fang@amd.com>
* gcc/config/i386/i386.c (processor_costs bdver1_cost): Update

2
gcc/gimple-fold.c
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@ -1044,6 +1044,8 @@ gimplify_and_update_call_from_tree (gimple_stmt_iterator *si_p, tree expr)
if (TREE_CODE (gimple_vdef (stmt)) == SSA_NAME)
SSA_NAME_DEF_STMT (gimple_vdef (stmt)) = new_stmt;
}
else if (reaching_vuse == gimple_vuse (stmt))
unlink_stmt_vdef (stmt);
}
gimple_set_location (new_stmt, gimple_location (stmt));

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-10-22 Richard Guenther <rguenther@suse.de>
PR middle-end/46137
* c-c++-common/torture/pr46137.c: New testcase.
2010-10-22 Jason Merrill <jason@redhat.com>
PR c++/46129

18
gcc/testsuite/c-c++-common/torture/pr46137.c Normal file
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@ -0,0 +1,18 @@
/* { dg-do compile } */
struct X { };
static inline void *
bar (void *dst, void *src)
{
return __builtin___memcpy_chk (dst, src, sizeof (struct X),
__builtin_object_size (dst, 0));
}
struct X
foo (struct X *x)
{
struct X any;
bar (&any, x);
return any;
}