Re: [PATCH, middle-end]: Backport "[PATCH] Avoid useless bitfield extractions" to 4.3 branch

[Uros Bizjak <ubizjak at gmail dot com>]

Uros Bizjak wrote:

> Eric's patch [1] fixes:
>
> FAIL: g++.dg/torture/pr35526.C  -O1  (internal compiler error)
> FAIL: g++.dg/torture/pr35526.C  -O1  (test for excess errors)
> FAIL: g++.dg/torture/pr35526.C  -O2  (internal compiler error)
> FAIL: g++.dg/torture/pr35526.C  -O2  (test for excess errors)
> FAIL: g++.dg/torture/pr35526.C  -O3 -fomit-frame-pointer  (internal 
> compiler error)
> FAIL: g++.dg/torture/pr35526.C  -O3 -fomit-frame-pointer  (test for 
> excess errors)
> FAIL: g++.dg/torture/pr35526.C  -O3 -g  (internal compiler error)
> FAIL: g++.dg/torture/pr35526.C  -O3 -g  (test for excess errors)
> FAIL: g++.dg/torture/pr35526.C  -Os  (internal compiler error)
> FAIL: g++.dg/torture/pr35526.C  -Os  (test for excess errors)
>
> for alpha-unknown-linux-gnu on 4.3 branch.
>
> 2008-12-01  Uros Bizjak  <ubizjak@gmail.com>
>
>    Backport from mainline:
>    2008-06-12  Eric Botcazou  <ebotcazou@adacore.com>
>
>    * expr.c (store_field): Do a block copy from BLKmode to BLKmode-like.
>    (get_inner_reference): Use BLKmode for byte-aligned BLKmode bitfields.
>
> Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu. 
> OK for branch?

[1] http://gcc.gnu.org/ml/gcc-patches/2008-06/msg00547.html

Uros.