[Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099 --- Comment #5 from Jakub Jelinek --- Author: jakub Date: Tue Aug 28 11:43:22 2018 New Revision: 263917 URL: https://gcc.gnu.org/viewcvs?rev=263917=gcc=rev Log: PR middle-end/87099 * calls.c (maybe_warn_nonstring_arg): Punt early if warn_stringop_overflow is zero. Don't call get_range_strlen on 3rd argument, keep iterating until lenrng[1] is INTEGER_CST. Only use lenrng[1] if non-NULL and INTEGER_CST. Don't uselessly increment lenrng[0]. * gcc.dg/pr87099.c: New test. Added: branches/gcc-8-branch/gcc/testsuite/gcc.dg/pr87099.c Modified: branches/gcc-8-branch/gcc/ChangeLog branches/gcc-8-branch/gcc/calls.c branches/gcc-8-branch/gcc/testsuite/ChangeLog
[Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099 --- Comment #4 from Jakub Jelinek --- Author: jakub Date: Tue Aug 28 11:13:04 2018 New Revision: 263915 URL: https://gcc.gnu.org/viewcvs?rev=263915=gcc=rev Log: PR middle-end/87099 * calls.c (maybe_warn_nonstring_arg): Punt early if warn_stringop_overflow is zero. Don't call get_range_strlen on 3rd argument, keep iterating until lenrng[1] is INTEGER_CST. Swap comparison operands to have constants on rhs. Only use lenrng[1] if non-NULL and INTEGER_CST. Don't uselessly increment lenrng[0]. * gcc.dg/pr87099.c: New test. Added: trunk/gcc/testsuite/gcc.dg/pr87099.c Modified: trunk/gcc/ChangeLog trunk/gcc/calls.c trunk/gcc/testsuite/ChangeLog
[Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099 Jakub Jelinek changed: What|Removed |Added Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek --- Created attachment 44610 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44610=edit gcc9-pr87099.patch Untested fix.
[Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099
Jakub Jelinek changed:
What|Removed |Added
CC||jakub at gcc dot gnu.org
--- Comment #2 from Jakub Jelinek ---
Started with r260541.
Simpler testcase:
void bar (char *);
int
foo (int n)
{
char v[n];
bar (v);
return __builtin_strncmp ([1], "aaa", 3);
}
[Bug middle-end/87099] [8/9 Regression] internal compiler error: segmentation fault
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87099 Richard Biener changed: What|Removed |Added Target||x86_64-*-* i?86-*-* Priority|P3 |P2 Status|UNCONFIRMED |NEW Known to work||8.1.0 Keywords||ice-on-valid-code Last reconfirmed||2018-08-27 Component|rtl-optimization|middle-end CC||msebor at gcc dot gnu.org Ever confirmed|0 |1 Summary|internal compiler error:|[8/9 Regression] internal |segmentation fault |compiler error: ||segmentation fault Target Milestone|--- |8.3 Known to fail||8.2.0 --- Comment #1 from Richard Biener --- Confirmed. Backtrace from trunk: during RTL pass: expand t.c: In function ‘main’: t.c:5:13: internal compiler error: Segmentation fault 5 | int a = strncmp(&(myArray[1]),"",3); | ^~~ 0x10491a9 crash_signal /space/rguenther/src/gcc-sccvn/gcc/toplev.c:325 0x7fe0cd2b2fdf ??? /usr/src/debug/glibc-2.22/signal/../sysdeps/unix/sysv/linux/x86_64/sigaction.c:0 0x842f44 contains_struct_check(tree_node const*, tree_node_structure_enum, char const*, int, char const*) /space/rguenther/src/gcc-sccvn/gcc/tree.h:3489 0x8766df wi::extended_tree<192>::extended_tree(tree_node const*) /space/rguenther/src/gcc-sccvn/gcc/tree.h:5541 0x875525 generic_wide_int >::generic_wide_int(tree_node const* const&) /space/rguenther/src/gcc-sccvn/gcc/wide-int.h:780 0x8750e5 wi::to_widest(tree_node const*) /space/rguenther/src/gcc-sccvn/gcc/tree.h:5468 0x875117 tree_int_cst_lt(tree_node const*, tree_node const*) /space/rguenther/src/gcc-sccvn/gcc/tree.h:5721 0x9ede7a maybe_warn_nonstring_arg(tree_node*, tree_node*) /space/rguenther/src/gcc-sccvn/gcc/calls.c:1663 0x9f02cb initialize_argument_information /space/rguenther/src/gcc-sccvn/gcc/calls.c:2197 0x9f4fd7 expand_call(tree_node*, rtx_def*, int) /space/rguenther/src/gcc-sccvn/gcc/calls.c:3583
