Bug#323646: gcc-4.0: -O1 -msse2 -ftree-vectorize breaks certain code

2005-08-18 Thread Matthias Klose 
close 323646 4.0.1-5
thanks

fixed at least in gcc-4.0_4.0.1-5

Alexander Toresson writes:
 Package: gcc-4.0
 Version: 4.0.1-2
 Severity: normal
 
 
 When compiled with -O1 -msse2 -ftree-vectorize, the following code
 snippet segfaults on data[i] = 1;:
 
 #include stdlib.h
 
 void *NM_First;
 
 void *NM_Allocate(int bytes)
 {
   void *ret;
   while (1)
   {
   ret = NM_First;
   NM_First = (void*) ((long) NM_First + bytes);
   return ret;
   }
   return 0;
 }
 
 
 void* repeat_atom()
 {
   double *data;
   void* item;
   int i;
   data = NM_Allocate(16);
   for (i=0; i  4; i++)
   {
   data[i] = 1;
   }
   item = NM_Allocate(12);
   return item;
 }
 
 int main()
 {
   struct ITEM *array1, *array2;
   
   NM_First = malloc(256);
   
   array1 = repeat_atom();
   array2 = repeat_atom();
   
   return 0;
 }
 
 This was tested on a Pentium M Sonoma.
 
 Regards, Alexander Toresson
 
 -- System Information:
 Debian Release: testing/unstable
   APT prefers testing
   APT policy: (500, 'testing')
 Architecture: i386 (i686)
 Shell:  /bin/sh linked to /bin/bash
 Kernel: Linux 2.6.12.1.custom.1.1
 Locale: LANG=sv_SE.UTF-8, LC_CTYPE=sv_SE.UTF-8 (charmap=UTF-8)
 
 Versions of packages gcc-4.0 depends on:
 ii  binutils  2.16.1-3   The GNU assembler, linker and 
 bina
 ii  cpp-4.0   4.0.1-2The GNU C preprocessor
 ii  gcc-4.0-base  4.0.1-2The GNU Compiler Collection 
 (base 
 ii  libc6 2.3.5-4GNU C Library: Shared libraries 
 an
 ii  libgcc1   1:4.0.1-2  GCC support library
 
 Versions of packages gcc-4.0 recommends:
 ii  libc6-dev 2.3.5-4GNU C Library: Development 
 Librari
 pn  libmudflap0-dev   none (no description available)
 
 -- no debconf information


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Bug#323646: gcc-4.0: -O1 -msse2 -ftree-vectorize breaks certain code

2005-08-17 Thread Alexander Toresson 
Package: gcc-4.0
Version: 4.0.1-2
Severity: normal


When compiled with -O1 -msse2 -ftree-vectorize, the following code
snippet segfaults on data[i] = 1;:

#include stdlib.h

void *NM_First;

void *NM_Allocate(int bytes)
{
void *ret;
while (1)
{
ret = NM_First;
NM_First = (void*) ((long) NM_First + bytes);
return ret;
}
return 0;
}


void* repeat_atom()
{
double *data;
void* item;
int i;
data = NM_Allocate(16);
for (i=0; i  4; i++)
{
data[i] = 1;
}
item = NM_Allocate(12);
return item;
}

int main()
{
struct ITEM *array1, *array2;

NM_First = malloc(256);

array1 = repeat_atom();
array2 = repeat_atom();

return 0;
}

This was tested on a Pentium M Sonoma.

Regards, Alexander Toresson

-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12.1.custom.1.1
Locale: LANG=sv_SE.UTF-8, LC_CTYPE=sv_SE.UTF-8 (charmap=UTF-8)

Versions of packages gcc-4.0 depends on:
ii  binutils  2.16.1-3   The GNU assembler, linker and bina
ii  cpp-4.0   4.0.1-2The GNU C preprocessor
ii  gcc-4.0-base  4.0.1-2The GNU Compiler Collection (base 
ii  libc6 2.3.5-4GNU C Library: Shared libraries an
ii  libgcc1   1:4.0.1-2  GCC support library

Versions of packages gcc-4.0 recommends:
ii  libc6-dev 2.3.5-4GNU C Library: Development Librari
pn  libmudflap0-dev   none (no description available)

-- no debconf information