From f3cc7f799c62e6b43c1a0c254fb49f8a0cbb0d79 Mon Sep 17 00:00:00 2001 From: kazu Date: Wed, 17 May 2006 21:34:57 +0000 Subject: [PATCH] PR rtl-optimization/27477 * combine.c (try_combine): Don't split a parallel consisting of two sets into two individual sets if both sets reference cc0. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@113872 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/ChangeLog | 7 +++++++ gcc/combine.c | 9 ++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d71b1b4c276..ff616dc32ff 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2006-05-17 Kazu Hirata + + PR rtl-optimization/27477 + * combine.c (try_combine): Don't split a parallel consisting + of two sets into two individual sets if both sets reference + cc0. + 2006-05-17 John David Anglin * unwind-dw2.c: Add declarations for uw_update_context and diff --git a/gcc/combine.c b/gcc/combine.c index 33512ec4635..c570ea628ee 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2896,7 +2896,14 @@ try_combine (rtx i3, rtx i2, rtx i1, int *new_direct_jump_p) && ! reg_referenced_p (SET_DEST (XVECEXP (newpat, 0, 0)), XVECEXP (newpat, 0, 1)) && ! (contains_muldiv (SET_SRC (XVECEXP (newpat, 0, 0))) - && contains_muldiv (SET_SRC (XVECEXP (newpat, 0, 1))))) + && contains_muldiv (SET_SRC (XVECEXP (newpat, 0, 1)))) +#ifdef HAVE_cc0 + /* We cannot split the parallel into two sets if both sets + reference cc0. */ + && ! (reg_referenced_p (cc0_rtx, XVECEXP (newpat, 0, 0)) + && reg_referenced_p (cc0_rtx, XVECEXP (newpat, 0, 1))) +#endif + ) { /* Normally, it doesn't matter which of the two is done first, but it does if one references cc0. In that case, it has to -- 2.11.4.GIT