From 3d77819c1e9c627bb0c283cafbd88acfd77e87e4 Mon Sep 17 00:00:00 2001 From: ian Date: Fri, 2 Feb 2007 19:16:04 +0000 Subject: [PATCH] * expmed.c (expand_divmod): Add comment. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@121519 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 4 ++++ gcc/expmed.c | 3 +++ 2 files changed, 7 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 95987efeb569..38dd30edfe18 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2007-02-02 Ian Lance Taylor + + * expmed.c (expand_divmod): Add comment. + 2007-02-02 Kazu Hirata * emit-rtl.c (renumber_insns): Remove. diff --git a/gcc/expmed.c b/gcc/expmed.c index fea859a18c1e..8e8a63917a19 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -4176,6 +4176,9 @@ expand_divmod (int rem_flag, enum tree_code code, enum machine_mode mode, HOST_WIDE_INT d = INTVAL (op1); unsigned HOST_WIDE_INT abs_d; + /* Since d might be INT_MIN, we have to cast to + unsigned HOST_WIDE_INT before negating to avoid + undefined signed overflow. */ abs_d = (d >= 0 ? (unsigned HOST_WIDE_INT) d : - (unsigned HOST_WIDE_INT) d); -- 2.47.3