From: Josef Wolf <jw@raven.inka.de>
To: gcc-help@gcc.gnu.org
Subject: Crash when cross compiling for ARM with GCC-8-2-0 and -ftree-loop-distribute-patterns
Date: Wed, 16 Oct 2019 13:19:00 -0000 [thread overview]
Message-ID: <20191016131759.GA11171@raven.inka.de> (raw)
Hello all,
I experience target crashing when cross compiling for ARM with
-ftree-loop-distribute-patterns, which is enabled by the -O3 flag.
The crash happens in the startup code, before main() is called. This startup
code looks like this:
extern unsigned long _sidata; /* Set by the linker */
extern unsigned long _sdata; /* Set by the linker */
extern unsigned long _sbss; /* Set by the linker */
extern unsigned long _ebss; /* Set by the linker */
void Reet_Handler (void)
{
unsigned long *src = &_sidata
unsigned long *src = &_sdata
/* Copy data segment into RAM */
if (src != dst) {
while (dst < &_edata)
*(dst++) = *(src++);
}
/* Zero BSS segment */
dst = &_sbss;
while (dst < &_ebss)
*(dst++) = 0;
main();
}
With -ftree-loop-distribute-patterns those two loops are replaced by calls to
memcpy() and memset().
The memcpy function finishes just fine. But the memset function doesn't seem
to finish. It looks like this:
void memset (void *s, int c, size_t n)
{
int i;
for (i=0; i<n; i++)
((char *)s)[i] = c;
}
Any ideas why this function is crashing? I can't see anything suspicious here.
Thanks
--
Josef Wolf
jw@raven.inka.de
next reply other threads:[~2019-10-16 13:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-16 13:19 Josef Wolf [this message]
2019-10-16 13:30 ` Matthias Pfaller
2019-10-17 8:10 ` Josef Wolf
2019-10-16 18:18 ` Martin Sebor
2019-10-17 11:40 ` Josef Wolf
2019-10-17 12:37 ` Matthias Pfaller
2019-10-17 14:10 ` Josef Wolf
2019-10-17 14:55 ` Richard Earnshaw (lists)
2019-10-18 9:00 ` Josef Wolf
2019-10-18 10:26 ` Richard Earnshaw (lists)
2019-10-18 12:10 ` Josef Wolf
2019-10-18 13:07 ` Segher Boessenkool
2019-10-18 13:40 ` Josef Wolf
2019-10-18 12:50 ` Josef Wolf
2019-10-18 14:04 ` Richard Earnshaw (lists)
2019-10-18 9:10 ` Propagating addresses from linker to the runtie (was: Re: Crash when cross compiling for ARM with GCC-8-2-0 and) -ftree-loop-distribute-patterns Josef Wolf
2019-10-18 9:15 ` Propagating addresses from linker to the runtie Florian Weimer
2019-10-18 9:50 ` Josef Wolf
2019-10-18 10:47 ` Florian Weimer
2019-10-18 12:51 ` Segher Boessenkool
2019-10-18 12:56 ` Florian Weimer
2019-10-18 14:14 ` Segher Boessenkool
2019-10-18 14:34 ` Florian Weimer
2019-10-18 13:30 ` Josef Wolf
2019-10-18 14:20 ` Segher Boessenkool
2019-10-18 13:10 ` Crash when cross compiling for ARM with GCC-8-2-0 and -ftree-loop-distribute-patterns Josef Wolf
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