From ca3f371f1246db1bf2b71abfdf844a08e0f5dc31 Mon Sep 17 00:00:00 2001 From: Teresa Johnson Date: Fri, 26 Oct 2012 17:19:35 +0000 Subject: Avoid conservative behavior in REE by allowing removal of redundant extends when... Avoid conservative behavior in REE by allowing removal of redundant extends when the def feeds another extend with a different mode. This works because in merge_def_and_ext only calls combine_set_extension if the candidate for removal has a wider mode than the def extend's mode, otherwise the def extend mode is preserved. In combine_set_extension the def is modified to use the wider candidate's mode. 2012-10-26 Teresa Johnson * ree.c (add_removable_extension): Remove unnecessary mode check with other extension. * testsuite/gcc.c-torture/execute/20111227-2.c: New test. * testsuite/gcc.c-torture/execute/20111227-3.c: Ditto. From-SVN: r192850 --- gcc/ree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'gcc/ree.c') diff --git a/gcc/ree.c b/gcc/ree.c index 167efa3..a2ede97 100644 --- a/gcc/ree.c +++ b/gcc/ree.c @@ -803,7 +803,7 @@ add_removable_extension (const_rtx expr, rtx insn, for (def = defs; def; def = def->next) if ((idx = def_map[INSN_UID(DF_REF_INSN (def->ref))]) && (cand = &VEC_index (ext_cand, *insn_list, idx - 1)) - && (cand->code != code || cand->mode != mode)) + && cand->code != code) { if (dump_file) { -- cgit v1.1