From 8714c250029e1dcdd2413318c8dc0d0c0f002f57 Mon Sep 17 00:00:00 2001 From: wilson Date: Fri, 24 Dec 1993 01:35:17 +0000 Subject: [PATCH] (optimize_reg_copy_1): After decreasing sregno's reg_live_length, correct it if it is now obviously too small. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@6291 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/local-alloc.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c index d626fd7..11e58e3 100644 --- a/gcc/local-alloc.c +++ b/gcc/local-alloc.c @@ -791,6 +791,11 @@ optimize_reg_copy_1 (insn, dest, src) if (sregno >= FIRST_PSEUDO_REGISTER) { reg_live_length[sregno] -= length; + /* reg_live_length is only an approximation after combine + if sched is not run, so make sure that we still have + a reasonable value. */ + if (reg_live_length[sregno] < 2) + reg_live_length[sregno] = 2; reg_n_calls_crossed[sregno] -= n_calls; } -- 2.7.4