* Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1?
@ 2002-07-22 4:13 H. J. Lu
2002-07-22 14:21 ` H. J. Lu
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: H. J. Lu @ 2002-07-22 4:13 UTC (permalink / raw)
To: gcc
On Linux/x86, I got
# ./xgcc -B../ ~/work/gnu/import/gcc-3.1/gcc/testsuite/gcc.c-torture/execute/20020307-2.c -O -mcpu=i686 -march=i386
# ./a.out
zsh: 32558 segmentation fault ./a.out
H.J.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1?
2002-07-22 4:13 Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1? H. J. Lu
@ 2002-07-22 14:21 ` H. J. Lu
2002-07-23 23:17 ` Richard Henderson
2002-07-26 8:54 ` H. J. Lu
2 siblings, 0 replies; 6+ messages in thread
From: H. J. Lu @ 2002-07-22 14:21 UTC (permalink / raw)
To: gcc; +Cc: jh
On Sun, Jul 21, 2002 at 10:56:32PM -0700, H. J. Lu wrote:
> On Linux/x86, I got
>
> # ./xgcc -B../ ~/work/gnu/import/gcc-3.1/gcc/testsuite/gcc.c-torture/execute/20020307-2.c -O -mcpu=i686 -march=i386
> # ./a.out
> zsh: 32558 segmentation fault ./a.out
>
The problem seems to be x86_accumulate_outgoing_args. When it is
enabled, gcc generates code like
call memcpy
call foo
As the result, some bogus value is passed to foo.
H.J.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1?
2002-07-22 4:13 Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1? H. J. Lu
2002-07-22 14:21 ` H. J. Lu
@ 2002-07-23 23:17 ` Richard Henderson
2002-07-26 8:54 ` H. J. Lu
2 siblings, 0 replies; 6+ messages in thread
From: Richard Henderson @ 2002-07-23 23:17 UTC (permalink / raw)
To: H. J. Lu; +Cc: gcc
On Sun, Jul 21, 2002 at 10:56:32PM -0700, H. J. Lu wrote:
> # ./xgcc -B../ ~/work/gnu/import/gcc-3.1/gcc/testsuite/gcc.c-torture/execute/20020307-2.c -O -mcpu=i686 -march=i386
This is a known failure.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1?
2002-07-22 4:13 Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1? H. J. Lu
2002-07-22 14:21 ` H. J. Lu
2002-07-23 23:17 ` Richard Henderson
@ 2002-07-26 8:54 ` H. J. Lu
2002-07-28 1:51 ` Richard Henderson
2 siblings, 1 reply; 6+ messages in thread
From: H. J. Lu @ 2002-07-26 8:54 UTC (permalink / raw)
To: gcc
[-- Attachment #1: Type: text/plain, Size: 338 bytes --]
On Sun, Jul 21, 2002 at 10:56:32PM -0700, H. J. Lu wrote:
> On Linux/x86, I got
>
> # ./xgcc -B../ ~/work/gnu/import/gcc-3.1/gcc/testsuite/gcc.c-torture/execute/20020307-2.c -O -mcpu=i686 -march=i386
> # ./a.out
> zsh: 32558 segmentation fault ./a.out
>
>
Since it is a known bug, will the patch enclosed here cause any harm?
H.J.
[-- Attachment #2: gcc-var.patch --]
[-- Type: text/plain, Size: 469 bytes --]
2002-07-25 H.J. Lu <hjl@gnu.org>
* calls.c (PUSH_ARGS_REVERSED): 1 if ACCUMULATE_OUTGOING_ARGS
is 1.
--- gcc/calls.c.var Fri Apr 5 23:25:04 2002
+++ gcc/calls.c Thu Jul 25 19:21:42 2002
@@ -47,7 +47,7 @@ Software Foundation, 59 Temple Place - S
#ifdef PUSH_ROUNDING
#if defined (STACK_GROWS_DOWNWARD) != defined (ARGS_GROW_DOWNWARD)
-#define PUSH_ARGS_REVERSED PUSH_ARGS
+#define PUSH_ARGS_REVERSED (PUSH_ARGS || ACCUMULATE_OUTGOING_ARGS)
#endif
#endif
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1?
2002-07-26 8:54 ` H. J. Lu
@ 2002-07-28 1:51 ` Richard Henderson
2002-07-28 21:27 ` H. J. Lu
0 siblings, 1 reply; 6+ messages in thread
From: Richard Henderson @ 2002-07-28 1:51 UTC (permalink / raw)
To: H. J. Lu; +Cc: gcc
On Thu, Jul 25, 2002 at 07:37:26PM -0700, H. J. Lu wrote:
> * calls.c (PUSH_ARGS_REVERSED): 1 if ACCUMULATE_OUTGOING_ARGS is 1.
What the hell are you trying to accomplish here? The
x86 bug appears when ACCUMULATE_OUTGOING_ARGS is false.
r~
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1?
2002-07-28 1:51 ` Richard Henderson
@ 2002-07-28 21:27 ` H. J. Lu
0 siblings, 0 replies; 6+ messages in thread
From: H. J. Lu @ 2002-07-28 21:27 UTC (permalink / raw)
To: Richard Henderson, gcc
On Sat, Jul 27, 2002 at 03:04:26PM -0700, Richard Henderson wrote:
> On Thu, Jul 25, 2002 at 07:37:26PM -0700, H. J. Lu wrote:
> > * calls.c (PUSH_ARGS_REVERSED): 1 if ACCUMULATE_OUTGOING_ARGS is 1.
>
> What the hell are you trying to accomplish here? The
> x86 bug appears when ACCUMULATE_OUTGOING_ARGS is false.
>
# /usr/gcc-3.1/bin/gcc -O -march=i386 -mcpu=i386 20020307-2.c -maccumulate-outgoing-args
# ./a.out
zsh: 29175 segmentation fault ./a.out
# /usr/gcc-3.1/bin/gcc -O -march=i386 -mcpu=i386 20020307-2.c
# ./a.out
#
Did I miss something? BTW, I have posted an updated patch:
http://gcc.gnu.org/ml/gcc-patches/2002-07/msg01561.html
H.J.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2002-07-28 1:32 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2002-07-22 4:13 Is gcc.c-torture/execute/20020307-2.c supposed to pass on gcc 3.1? H. J. Lu
2002-07-22 14:21 ` H. J. Lu
2002-07-23 23:17 ` Richard Henderson
2002-07-26 8:54 ` H. J. Lu
2002-07-28 1:51 ` Richard Henderson
2002-07-28 21:27 ` H. J. Lu
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