--- Comment #10 from mkuvyrkov at gcc dot gnu dot org 2010-04-23 10:20
---
The problem seems to be in Richard's patch
(http://article.gmane.org/gmane.comp.gcc.patches/130602) checked in r120961.
All and all, it seems that revision 120961 should be reverted to enable 'T'
constraint for
--- Comment #8 from mkuvyrkov at gcc dot gnu dot org 2010-04-22 07:09
---
Subject: Re: [4.5/4.6 regression] ICE in reload_cse_simplify_operands
On 4/22/10 3:40 AM, schwab at linux-m68k dot org wrote:
--- Comment #7 from schwab at linux-m68k dot org 2010-04-21 23:40 ---
I
--- Comment #9 from schwab at linux-m68k dot org 2010-04-22 09:20 ---
Probably the author of T didn't realise that !-mpcrel in (!-mpcrel 's') is
already implied. It is already a no-op in the -mpcrel case.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43804
--- Comment #3 from mkuvyrkov at gcc dot gnu dot org 2010-04-21 10:47
---
There are two problems here:
1. The immediate problem is that movsi_m68k doesn't allow (const) to be moved
to data register (see last alternative if movsi_m68k).
2. For reason, which I have not yet investigated,
--- Comment #4 from schwab at linux-m68k dot org 2010-04-21 13:22 ---
Introduced in r27576. Presumably the first alternative is supposed to catch
this case, through T+g, but T does not match if flag_pic, contrary to its
documentation (introduced in r120961).
--
--- Comment #5 from mkuvyrkov at gcc dot gnu dot org 2010-04-21 19:43
---
Subject: Re: [4.5/4.6 regression] ICE in reload_cse_simplify_operands
On 4/21/10 5:23 PM, schwab at linux-m68k dot org wrote:
--- Comment #4 from schwab at linux-m68k dot org 2010-04-21 13:22 ---
--- Comment #6 from schwab at linux-m68k dot org 2010-04-21 22:51 ---
(In reply to comment #5)
assuming -mpcrel and -fpic are equivalent:
They aren't. -mpcrel implies -fpic, but not the other way round.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43804
--- Comment #7 from schwab at linux-m68k dot org 2010-04-21 23:40 ---
I think 'T' should accept tls references like 's' does.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43804
--
rguenth at gcc dot gnu dot org changed:
What|Removed |Added
Target Milestone|--- |4.5.1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43804
--- Comment #1 from schwab at linux-m68k dot org 2010-04-19 20:13 ---
Created an attachment (id=20424)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20424action=view)
Preprocessed testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43804
--- Comment #2 from schwab at linux-m68k dot org 2010-04-19 20:14 ---
Created an attachment (id=20425)
-- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20425action=view)
Reduced testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43804
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