[Bug target/55212] [SH] Switch to LRA

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212

--- Comment #99 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Kazumoto Kojima from comment #98)
> I guess that these pr64661-x.c regressions are not so problem, though.

I agree.

> I'm not sure whether hiconst.c regression is serious or not.

I think we can ignore this for now.  It's about loading/sharing constants. 
There are more constant related inefficiencies which can be addressed later.

> The serious one would be
> 
> Running target sh-sim/-m2/-mb
> FAIL: gcc.c-torture/execute/20040709-2.c   -Os  execution test

I will have a look at it.


> My sh4-unknown-linux-gnu test also shows another execution
> errors for libstdc++-v3.
> 
> New tests that FAIL:
> 
> 22_locale/money_get/get/wchar_t/14.cc execution test
> 22_locale/money_get/get/wchar_t/19.cc execution test
> 22_locale/money_get/get/wchar_t/22131.cc execution test
> 22_locale/money_get/get/wchar_t/38399.cc execution test
> 22_locale/money_get/get/wchar_t/39168.cc execution test
> 22_locale/money_get/get/wchar_t/6.cc execution test
> 22_locale/money_get/get/wchar_t/8.cc execution test
> 22_locale/money_get/get/wchar_t/9.cc execution test
> 22_locale/money_put/put/wchar_t/39168.cc execution test
> 22_locale/money_put/put/wchar_t/5.cc execution test
> 22_locale/money_put/put/wchar_t/6.cc execution test
> 
> These tests compiled with -mlra don't fail with libstdc++-v3
> library compiled with -mno-lra, i.e. libstdc++-v3 is miscompiled
> with -mlra.  These wrong code problems should be resolved before
> witch to LRA.

Hm .. those don't fail on sh-elf ... maybe something related to the atomics? 
Atomics are off by default for sh-elf, but on for sh-linux.