[Bug c++/58059] g++: internal compiler error: Segmentation fault (program cc1plus)

2015-12-14 Thread felix.janda at posteo dot de 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58059

Felix Janda  changed:

   What|Removed |Added

 CC||felix.janda at posteo dot de

--- Comment #5 from Felix Janda  ---
Created attachment 37031
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37031&action=edit
Simplified preprocessed output

Can confirm with gentoo's gcc 4.9.3 on arm.

[Bug c/68866] New: ICE in set_lattice_value, at tree-ssa-cpp.c:490

2015-12-11 Thread felix.janda at posteo dot de 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68866

Bug ID: 68866
   Summary: ICE in set_lattice_value, at tree-ssa-cpp.c:490
   Product: gcc
   Version: 4.9.3
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c
  Assignee: unassigned at gcc dot gnu.org
  Reporter: felix.janda at posteo dot de
  Target Milestone: ---

Minimal test case (containing invalid code):

static char *a[] = {""};
int main(void) {
for(int i=1;i<2;i++) if(a[i]) break;
}

The same error was already observed in

http://www.openwall.com/lists/musl/2013/11/07/14

[Bug c/65958] [arm] -fstack-check breaks __builtin(alloca)

2015-05-01 Thread felix.janda at posteo dot de 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65958

--- Comment #2 from Felix Janda  ---
Actually I can hit this issue also with sh4 and microblaze. The test
program needs to be modified slightly:

int main(void)
{
char *p;
if(1) {
char i[48];
p = __builtin_alloca(8);
p[0] = 1;
}
if(1) {
char i[48] , j[64];
j[52] = 0;
}
return !p[0];
}

[Bug c/65958] New: -fstack-check breaks __builtin(alloca)

2015-04-30 Thread felix.janda at posteo dot de 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65958

Bug ID: 65958
   Summary: -fstack-check breaks __builtin(alloca)
   Product: gcc
   Version: 4.9.2
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c
  Assignee: unassigned at gcc dot gnu.org
  Reporter: felix.janda at posteo dot de
  Target Milestone: ---
Target: arm

On arm, gcc-4.9.2 compiles the following snippet to a program which
returns 1 instead of 0 when the option -fstack-check is given.

int main(void)
{
char *p;
if(1) {
char i[48];
p = __builtin_alloca(8);
p[0] = 1;
}
if(1) {
char i[48], j[64];
j[48] = 0;
}
return !p[0];
}


I could reproduce the behavior already with gcc-4.7.1.

The issue causes miscompilation of bash's lib/glob/glob.c. See:
https://bugs.gentoo.org/show_bug.cgi?id=518598