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[Bug target/27234] no way to stop gcc from mucking with the incoming argument stack on ia32
- From: "hubicka at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Apr 2008 15:40:42 -0000
- Subject: [Bug target/27234] no way to stop gcc from mucking with the incoming argument stack on ia32
- References: <bug-27234-12219@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #20 from hubicka at gcc dot gnu dot org 2008-04-29 15:40 -------
Created an attachment (id=15546)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15546&action=view)
New patch
Hi,
this patch implements idea of having temporary read-only register with
REG_EQUIV note that will get propagated to place of the read-write parameter
register.
However I am still midly confused, when reload is actually using the operand
slot in read-write way? I don't seem to be able to construct a testcase.
If reload is not doing that, perhaps just dropping the function.c part of patch
is easiest way around.
Honza
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27234