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Re: c/859: sparc-specific pessimal code for simple loop
- To: rth at redhat dot com
- Subject: Re: c/859: sparc-specific pessimal code for simple loop
- From: "David S. Miller" <davem at redhat dot com>
- Date: Tue, 21 Nov 2000 23:02:36 -0800
- CC: jakub at redhat dot com, gcc-gnats at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, bernds at redhat dot com, jbuck at synopsys dot com
- References: <20001121213559.26387.qmail@sourceware.cygnus.com> <20001121230119.A19367@redhat.com>
Date: Tue, 21 Nov 2000 23:01:19 -0800
From: Richard Henderson <rth@redhat.com>
This is a STRICT_ALIGNMENT machine, therefore DFmode and DImode
operands must be 8-byte aligned, thus the EXTRA_CONSTRAINT check
ought to be redundant, no?
I remember there were some issues with var-args, which could make
"long long" and other DF/DI mode values go into the stack only 4-byte
aligned. This case needed to be handled, and I am pretty sure this is
where all the wacky constraint stuff comes from.
Later,
David S. Miller
davem@redhat.com