trunk-g/gcc> ./xgcc -B. -o t -O2 t.c -fno-inline -fwhole-program
t.c: In function 's4.constprop.0':
t.c:4:6: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
#include <stdio.h>
#define SIZE 40000
void s4 (float *a)
{
(void) __builtin_memset ((void *) a, 0, sizeof(float)*SIZE);
}
int main ()
{
static float a[SIZE];
int i;
printf("Start\n");
for (i = 0; i < SIZE; i++)
s4 (a);
printf("Done\n");
return 0;
}
we have a VOID result decl ...
Program received signal SIGSEGV, Segmentation fault.
0x0000000000a17e84 in get_ref_base_and_extent (exp=0x7ffff7edd900,
poffset=0x7fffffffd670, psize=0x7fffffffd678, pmax_size=0x7fffffffd680)
at /space/rguenther/src/svn/trunk/gcc/tree-dfa.c:941
941 if (maxsize == -1
(gdb) l
936
937 if (DECL_P (exp))
938 {
939 /* If maxsize is unknown adjust it according to the size of the
940 base decl. */
941 if (maxsize == -1
942 && TREE_CODE (DECL_SIZE (exp)) == INTEGER_CST)
(gdb) call debug_tree (exp)
<result_decl 0x7ffff7edd900 D.3219
type <void_type 0x7ffff7ee7e70 void VOID
align 8 symtab 0 alias set -1 canonical type 0x7ffff7ee7e70
pointer_to_this <pointer_type 0x7ffff7ee7f18>>
used ignored VOID file t.c line 4 col 6
align 8 context <function_decl 0x7ffff5b94300 s4.constprop.0>
abstract_origin <result_decl 0x7ffff7edd300 D.2008>>
It looks like we build this result decl during versioning?
--
Summary: [4.6 Regression] ICE with tree tailcall and ipa-cp
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44635
