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Re: [PR64164] drop copyrename, integrate into expand

From: Alan Lawrence <alan dot lawrence at arm dot com>
To: Alexandre Oliva <aoliva at redhat dot com>
Cc: Jeff Law <law at redhat dot com>, James Greenhalgh <James dot Greenhalgh at arm dot com>, "H.J. Lu" <hjl dot tools at gmail dot com>, Segher Boessenkool <segher at kernel dot crashing dot org>, Richard Biener <richard dot guenther at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Christophe Lyon <christophe dot lyon at linaro dot org>, David Edelsohn <dje dot gcc at gmail dot com>, Eric Botcazou <ebotcazou at adacore dot com>
Date: Thu, 3 Sep 2015 11:58:20 +0100
Subject: Re: [PR64164] drop copyrename, integrate into expand
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References: <orio9cw10j dot fsf at livre dot home> <CAFiYyc3k9xh_6RGbTdHYOJ-aEmUWVeFRoWy=YzCHFDNSdtTXCA at mail dot gmail dot com> <orwpxqvqnp dot fsf at livre dot home> <20150723203112 dot GB27818 at gate dot crashing dot org> <CAMe9rOpR+2gPxo0tKaRPtcML_Q4=r-_=9iqk+_JZFPkM=eN=BQ at mail dot gmail dot com> <CAMe9rOpbLEyDexVJqJAFJ3W6o4AktNog-jwk2CY4GZkrmT+nfA at mail dot gmail dot com> <or4mkmhgc9 dot fsf at livre dot home> <CAMe9rOp=S5fu1N=i7waswCYqJeLBCrySqYdFYkVa7LV04vpQSg at mail dot gmail dot com> <CAMe9rOrq+ZBAg1nZ1twEcPqwBj4j9+XA+SXQJVWWzjfdvidjtw at mail dot gmail dot com> <or1tfkdjhj dot fsf at livre dot home> <20150810082355 dot GA31149 at arm dot com> <55C8BFC3 dot 3030603 at redhat dot com> <CAKQMxzRzMrGtf921vqXCno5uoBN+uzsnJ5wX2Twmvhp1ziAEcA at mail dot gmail dot com> <or37zlpujd dot fsf at livre dot home> <55E72D4C dot 40705 at arm dot com> <orfv2wxygm dot fsf at livre dot home>

On 02/09/15 23:12, Alexandre Oliva wrote:

On Sep  2, 2015, Alan Lawrence <alan.lawrence@arm.com> wrote:

One more failure to report, I'm afraid. On AArch64 Bigendian,
aapcs64/func-ret-4.c ICEs in simplify_subreg (line refs here are from
r227348):


Thanks.  The failure mode was different in the current, revamped git
branch aoliva/pr64164, but I've just fixed it there.

I'm almost ready to post a new patch, with a new, simpler, less fragile
and more maintainable approach to integrate cfgexpand and assign_parms'
RTL assignment, so if you could give it a spin on big and little endian
aarch64 natives, that would be very much appreciated!

On aarch64_be, that branch fixes the ICE - but func-ret-4.c fails on execution,and now func-ret-3.c does too! Also it causes a bunch of errors building newlibusing cross-built binutils, which I haven't tracked down yet:

/work/alalaw01/src2/binutils-gdb/newlib/libc/locale/locale.c: In function'__get_locale_env':/work/alalaw01/src2/binutils-gdb/newlib/libc/locale/locale.c:911:1: internalcompiler error: in insert_value_copy_on_edge, at tree-outof-ssa.c:308

 __get_locale_env(struct _reent *p, int category)
 ^
0xb4ecc4 insert_value_copy_on_edge
	/work/alalaw01/src2/gcc/gcc/tree-outof-ssa.c:307
0xb4ecc4 eliminate_phi
	/work/alalaw01/src2/gcc/gcc/tree-outof-ssa.c:780
0xb4ecc4 expand_phi_nodes(ssaexpand*)
	/work/alalaw01/src2/gcc/gcc/tree-outof-ssa.c:943
0x6e74a6 execute
	/work/alalaw01/src2/gcc/gcc/cfgexpand.c:6242
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[7]: *** [lib_a-locale.o] Error 1

--Alan

References:
- Re: [PR64164] drop copyrename, integrate into expand
  - From: Alan Lawrence
- Re: [PR64164] drop copyrename, integrate into expand
  - From: Alexandre Oliva

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