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

Uros Bizjak ubizjak@gmail.com
Sun Jan 4 21:09:00 GMT 2009


Hello!

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?

Thanks,
Uros.
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