From: Makoto Fujiwara <makoto@ki.nu>
To: gcc@gcc.gnu.org
Subject: Re: Preserve registers across function call (Re: CALL_USED_REGISTERS)
Date: Fri, 17 Jul 2009 09:17:00 -0000 [thread overview]
Message-ID: <yfm1vofactb.wl%makoto@ki.nu> (raw)
In-Reply-To: <4A5F467D.9000504@redhat.com>
Richard, thanks for great help,
I think it'been more than serveral weeks :-) to figure out why.
Now I am in good mood. thanks a lot, really appreciate.
The fragments of the code for mine is like follows.
(It is 4.2.1 based)
(save)
+ for (regno = 0; regno < FIRST_PSEUDO_REGISTER ; regno++)
+ {
+ if (!fixed_regs[regno] && regs_ever_live[regno] && !call_used_regs[regno])
+ {
+ insn = emit_insn (gen_pushqi (gen_rtx_REG (Pmode, regno)));
+ // RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ }
(restore)
+ for (regno = FIRST_PSEUDO_REGISTER ; regno-- > 0; ) {
+ if ((!fixed_regs[regno] )&& regs_ever_live[regno] && (!call_used_regs[regno])) {
+ insn = emit_insn (gen_popqi (gen_rtx_REG (QImode, regno)));
+ // RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ }
Why QImode ? Don't ask that for the moment,
Thanks again,
---
Makoto Fujiwara,
Chiba, Japan, Narita Airport and Disneyland prefecture.
prev parent reply other threads:[~2009-07-17 9:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-16 8:47 Makoto Fujiwara
2009-07-16 15:26 ` Richard Henderson
2009-07-17 9:17 ` Makoto Fujiwara [this message]
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