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[Bug tree-optimization/71840] New: [7 Regression] internal compiler error: Segmentation fault in compute_avail
- From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 11 Jul 2016 11:46:50 +0000
- Subject: [Bug tree-optimization/71840] New: [7 Regression] internal compiler error: Segmentation fault in compute_avail
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71840
Bug ID: 71840
Summary: [7 Regression] internal compiler error: Segmentation
fault in compute_avail
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
With the following testcase (derived from libgcc/config/libbid/bid128_fma.c) on
x86_64-pc-linux-gnu I get
$ ./cc1 -quiet -O2 x.c
x.c: In function ‘foo’:
x.c:24:8: warning: assignment makes integer from pointer without a cast
[-Wint-conversion]
*p = res;
^
x.c:17:1: internal compiler error: Segmentation fault
foo (S c, int *p)
^~~
0xb8566f crash_signal
/home/marek/src/gcc/gcc/toplev.c:335
0xd1d174 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
/home/marek/src/gcc/gcc/tree.h:3143
0xd1d174 compute_avail
/home/marek/src/gcc/gcc/tree-ssa-pre.c:3811
0xd1d174 execute
/home/marek/src/gcc/gcc/tree-ssa-pre.c:4846
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
typedef struct
{
int w[4];
} S;
extern void res (S *);
void
bar (S x, S *p)
{
S z;
if (x.w[2])
*p = z;
}
void
foo (S c, int *p)
{
S s;
res (&s);
if (c.w[2] || s.w[2])
bar (s, &s);
if (s.w[0])
*p = res;
}