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Re: FAIL: gcc.c-torture/compile/20000804-1.c -O0 with PIC on gcc-4_4-branch
On Mon, Jul 13, 2009 at 5:39 AM, Jack Howarth<howarth@bromo.med.uc.edu> wrote:
> On Mon, Jul 13, 2009 at 01:52:51AM +0100, Dave Korn wrote:
>> Richard Guenther wrote:
>> > On Sun, Jul 12, 2009 at 9:41 PM, Jack Howarth<howarth@bromo.med.uc.edu> wrote:
>> >> ? I am seeing a new failure on x86_64-apple-darwin10 in current gcc 4.4 branch
>> >> that wasn't present in the gcc 4.4.0 release. At -m32, the testsuite failure...
>> >>
>> >> FAIL: gcc.c-torture/compile/20000804-1.c ?-O0 ?(test for excess errors)
>>
>> ? Do you know what this test is supposed to be doing?
>>
>> > $ cat /gnu/gcc/gcc/gcc/testsuite/gcc.c-torture/compile/20000804-1.c
>> > /* This does not work on m68hc11 or h8300 due to the use of an asm
>> > ? ?statement to force a 'long long' (64-bits) to go in a register. ?*/
>> > /* { dg-do assemble } */
>> > /* { dg-skip-if "" { { i?86-*-* x86_64-*-* } && ilp32 } { "-fpic" "-fPIC" } { ""
>> > ?} } */
>> > /* { dg-skip-if "PIC default" { i?86-*-darwin* } { "*" } { "" } } */
>> > /* { dg-skip-if "No 64-bit registers" { m32c-*-* } { "*" } { "" } } */
>> > /* { dg-xfail-if "" { m6811-*-* m6812-*-* h8300-*-* } { "*" } { "" } } */
>> >
>> > /* Copyright (C) 2000, 2003 Free Software Foundation */
>> > __complex__ long long f ()
>> > {
>> > ? int i[99];
>> > ? __complex__ long long v;
>> >
>> > ? v += f ();
>>
>> ? Undefined behaviour, no?
>>
>> ? ? cheers,
>> ? ? ? DaveK
>
> So then the testcase is flawed and should have the darwin line corrected to...
>
> /* { dg-skip-if "PIC default" { { i?86-*-darwin* x86_64-*-darwin* } && ilp32 } ?{ "*" } { "" } } */
Probably yes. The testcase invokes undefined behavior because
v is used uninitialized - but that may be the trigger for the original
ICE, so better preserve that.
Richard.
>
>
>