From cac5cd08b4afc23d194bc034f67bed94243c605a Mon Sep 17 00:00:00 2001 From: jakub Date: Tue, 13 Jan 2009 22:36:06 +0000 Subject: PR rtl-optimization/38774 * combine.c (simplify_set): When undoing cc_use change, don't do PUT_CODE on the newly created comparison, but instead put back the old comparison. * gcc.dg/torture/pr38774.c: New test. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@143355 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/combine.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'gcc/combine.c') diff --git a/gcc/combine.c b/gcc/combine.c index 82bf9f5e115..3aca075aae1 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5706,6 +5706,7 @@ simplify_set (rtx x) { int other_changed_previously = other_changed; unsigned HOST_WIDE_INT mask; + rtx old_cc_use = *cc_use; SUBST (*cc_use, gen_rtx_fmt_ee (new_code, GET_MODE (*cc_use), dest, const0_rtx)); @@ -5728,7 +5729,7 @@ simplify_set (rtx x) if ((recog_for_combine (&pat, other_insn, ¬e) < 0 && ! check_asm_operands (pat))) { - PUT_CODE (*cc_use, old_code); + *cc_use = old_cc_use; other_changed = 0; op0 = simplify_gen_binary (XOR, GET_MODE (op0), -- cgit v1.2.1