[Bug middle-end/39254] [4.4 Regression] gcc.c-torture/execute/va-arg-trap-1.c ICEs on powerpc-apple-darwin9

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

------- Comment #11 from amylaar at gcc dot gnu dot org  2009-03-03 09:40 -------
(In reply to comment #10)
> Mike, as far as I can tell, you originally (in 1997) added the code to
> rs6000.md which is now in rs6000.c:rs6000_emit_move and emits a USE
> for SYMBOL_REFS that are the source of a move.  (Search for
> "Emit a USE operation").

I have tried to #ifdef 0 this code in rs6000_emit_move, and a regression
test on gcc40 (powerpc64-unknown-linux-gnu) shows only two differences,
i.e.
FAIL: gcc.c-torture/execute/va-arg-trap-1.c compilation,  -O2  (internal
compile
r error)
FAIL: gcc.c-torture/execute/va-arg-trap-1.c compilation,  -Os  (internal
compile
r error)
from the baseline went away.

I've used revision 144485 for my baseline, and after determining that
a standard bootstrap did not work (probably a 32/64 bit ABI problem,
I didn't think it was worth the trouble to hand-bootstrap to 64 bit
considering this is probably not the OS we really need testing)
I built / tested with:
( make all-gcc all-target-libgcc all-target-libobjc all-target-libstdc++-v3
all-target-libgfortran;make check) > make.out 2>&1 &
baseline summaries:
                === gcc Summary ===

# of expected passes            52951
# of unexpected failures        23
# of expected failures          204
# of unresolved testcases       2
# of unsupported tests          615
                === g++ Summary ===

# of expected passes            19046
# of expected failures          140
# of unsupported tests          133
                === gfortran Summary ===

# of expected passes            29054
# of expected failures          11
# of unsupported tests          183
                === libstdc++ Summary ===

# of expected passes            5828
# of unexpected failures        1
# of unexpected successes       4
# of expected failures          80
# of unsupported tests          333

Patched summary:
                === gcc Summary ===

# of expected passes            52955
# of unexpected failures        21
# of expected failures          204
# of unsupported tests          615
; identical as baseline above for the other testsuites.

I think this should be tested on a power or powerpc AIX target.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39254