From 80b5fa01491cd3e957cc222cf7a5b984683dd559 Mon Sep 17 00:00:00 2001 From: rguenth Date: Tue, 15 Feb 2011 13:04:47 +0000 Subject: 2011-02-15 Richard Guenther PR tree-optimization/47743 * tree-ssa-pre.c (phi_translate_1): If we didn't get a value-number for a non-type-compatible VN lookup bail out. * gcc.dg/torture/pr47743.c: New testcase. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@170173 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/tree-ssa-pre.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'gcc/tree-ssa-pre.c') diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 3056723e2ec..f2466432f89 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -1691,6 +1691,12 @@ phi_translate_1 (pre_expr expr, bitmap_set_t set1, bitmap_set_t set2, result = fold_build1 (VIEW_CONVERT_EXPR, ref->type, result); converted = true; } + else if (!result && newref + && !useless_type_conversion_p (ref->type, newref->type)) + { + VEC_free (vn_reference_op_s, heap, newoperands); + return NULL; + } if (result && is_gimple_min_invariant (result)) { -- cgit v1.2.1