From f9adcdecb2035ff8eb1b55428a1392b7d90503cc Mon Sep 17 00:00:00 2001 From: Paul Koning Date: Thu, 12 Jul 2018 15:02:57 -0400 Subject: rtl.texi (REG_NONNEG): Remove decrement and branch until zero reference, add doloop_end instead. * doc/rtl.texi (REG_NONNEG): Remove decrement and branch until zero reference, add doloop_end instead. * doc/md.texi (decrement_and_branch_until_zero): Remove. (Looping patterns): Remove decrement_and_branch_until_zero. Add detail for doloop_end. From-SVN: r262603 --- gcc/doc/rtl.texi | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'gcc/doc/rtl.texi') diff --git a/gcc/doc/rtl.texi b/gcc/doc/rtl.texi index b5410f9..a37d9ac 100644 --- a/gcc/doc/rtl.texi +++ b/gcc/doc/rtl.texi @@ -4151,11 +4151,11 @@ This means it appears in a @code{post_inc}, @code{pre_inc}, @findex REG_NONNEG @item REG_NONNEG The register @var{op} is known to have a nonnegative value when this -insn is reached. This is used so that decrement and branch until zero -instructions, such as the m68k dbra, can be matched. +insn is reached. This is used by special looping instructions +that terminate when the register goes negative. -The @code{REG_NONNEG} note is added to insns only if the machine -description has a @samp{decrement_and_branch_until_zero} pattern. +The @code{REG_NONNEG} note is added only to @samp{doloop_end} +insns, if its pattern uses a @code{ge} condition. @findex REG_LABEL_OPERAND @item REG_LABEL_OPERAND -- cgit v1.1