[Bug target/49881] [AVR] Inefficient stack manipulation around calls

["gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49881

--- Comment #7 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2011-07-29 14:39:31 UTC ---
(In reply to comment #4)

> Would one of you be so kind as to do a full test run?
> I don't have avr-libc et al set up on this machine...

Just running tests without regenerating libs:

gcc.c-torture/compile/20030903-1.c:23:1: error: unrecognizable insn:

(insn 43 42 44 3 (set (mem:HI (post_dec:HI (reg/f:HI 32 __SP_L__)) [0 S2 A8])

        (reg:HI 68))
/mnt/nfs/home/georg/gnu/gcc.gnu.org/trunk/gcc/testsuite/gcc.c-torture/compile/20030903-1.c:15
-1

     (nil))


FAIL: gcc.c-torture/compile/20030903-1.c  -O0
FAIL: gcc.c-torture/compile/20030903-1.c  -O1
FAIL: gcc.c-torture/compile/20030903-1.c  -O2
FAIL: gcc.c-torture/compile/20030903-1.c  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/compile/20030903-1.c  -O3 -g
FAIL: gcc.c-torture/compile/20030903-1.c  -Os

gcc.c-torture/execute/complex-7.c:56:1: error: unrecognizable insn:

(insn 15 14 16 3 (set (mem:SF (post_dec:HI (reg/f:HI 32 __SP_L__)) [0 S4 A8])

        (reg:SF 43 [ f5.0+4 ]))

FAIL: gcc.c-torture/execute/complex-7.c compilation,  -O0
FAIL: gcc.c-torture/execute/complex-7.c compilation,  -O1
FAIL: gcc.c-torture/execute/complex-7.c compilation,  -O2
FAIL: gcc.c-torture/execute/complex-7.c compilation,  -O3 -fomit-frame-pointer
FAIL: gcc.c-torture/execute/complex-7.c compilation,  -O3 -g
FAIL: gcc.c-torture/execute/complex-7.c compilation,  -Os

There are many other FAILs that go into the same direction.

-------------------------------------------------

The good news is that the following known FAILs, aka. PR49629, pass with your
patch:

gcc.c-torture/compile/pr34448.c: In function 'build_attr_cert':

gcc.c-torture/compile/pr34448.c:31:1: internal compiler error: in
df_refs_verify, at df-scan.c:4268

Please submit a full bug report,

with preprocessed source if appropriate.

See <http://gcc.gnu.org/bugs.html> for instructions.


FAIL: gcc.c-torture/compile/pr34448.c  -O2  (internal compiler error)
FAIL: gcc.c-torture/compile/pr34448.c  -O2  (test for excess errors)
FAIL: gcc.c-torture/compile/pr34448.c  -O3 -fomit-frame-pointer  (internal
compiler error)
FAIL: gcc.c-torture/compile/pr34448.c  -O3 -fomit-frame-pointer  (test for
excess errors)
FAIL: gcc.c-torture/compile/pr34448.c  -O3 -g  (internal compiler error)
FAIL: gcc.c-torture/compile/pr34448.c  -O3 -g  (test for excess errors)

FAIL: gcc.c-torture/compile/pr39928-1.c  -O2  (internal compiler error)
FAIL: gcc.c-torture/compile/pr39928-1.c  -O2  (test for excess errors)
FAIL: gcc.c-torture/compile/pr39928-1.c  -O3 -fomit-frame-pointer  (internal
compiler error)
FAIL: gcc.c-torture/compile/pr39928-1.c  -O3 -fomit-frame-pointer  (test for
excess errors)
FAIL: gcc.c-torture/compile/pr39928-1.c  -O3 -g  (internal compiler error)
FAIL: gcc.c-torture/compile/pr39928-1.c  -O3 -g  (test for excess errors)
P