https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82381
Bug ID: 82381
Summary: internal compiler error: qsort checking failed
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: babokin at gmail dot com
Target Milestone: ---
GCC trunk rev 253307, x86_64.
This looks like a fresh regression. I see quite many fails like this one.
> cat f.cpp
char b, h;
unsigned short c, e;
short d, f, g;
void i() {
if (h) {
short a(-(d + c - b));
f = e - a - -d;
}
if (c)
g = 0;
}
> g++ -O2 -c f.cpp
f.cpp: In function ‘void i()’:
f.cpp:4:6: error: qsort comparator non-negative on sorted output: 1
void i() {
^
during GIMPLE pass: reassoc
f.cpp:4:6: internal compiler error: qsort checking failed
0x8fbc82 qsort_chk_error
../../gcc/gcc/vec.c:222
0x8fbcfb qsort_chk(void*, unsigned long, unsigned long, int (*)(void const*,
void const*))
../../gcc/gcc/vec.c:274
0x7d9118 vec<operand_entry*, va_heap, vl_embed>::qsort(int (*)(void const*,
void const*))
../../gcc/gcc/vec.h:973
0x7d9118 vec<operand_entry*, va_heap, vl_ptr>::qsort(int (*)(void const*, void
const*))
../../gcc/gcc/vec.h:1735
0x7d9118 reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5839
0x7d755b reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5979
0x7d755b reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5979
0x7d755b reassociate_bb
../../gcc/gcc/tree-ssa-reassoc.c:5979
0x109673c do_reassoc
../../gcc/gcc/tree-ssa-reassoc.c:6093
0x109673c execute_reassoc
../../gcc/gcc/tree-ssa-reassoc.c:6180
0x109673c execute
../../gcc/gcc/tree-ssa-reassoc.c:6219
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
