https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112733
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org,
| |rguenth at gcc dot gnu.org
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, stack corruption. Last good frame:
#0 wi::divmod_internal (quotient=0x0, remainder_len=0x7fffffffc8fc,
remainder=0x7fffffffc990, dividend_val=0x7ffff71c4e68, dividend_len=1,
dividend_prec=131072, divisor_val=0x7ffff702d010, divisor_len=1,
divisor_prec=131072, sgn=UNSIGNED, oflow=0x0)
at /space/rguenther/src/gcc/gcc/wide-int.cc:1800
#1 0x00000000011ec195 in
wi::mod_trunc<generic_wide_int<wi::extended_tree<131072> >,
generic_wide_int<wi::extended_tree<131072> > > (x=..., y=...,
sgn=UNSIGNED, overflow=0x0) at /space/rguenther/src/gcc/gcc/wide-int.h:3382
#2 0x00000000011e90ee in
wi::multiple_of_p<generic_wide_int<wi::extended_tree<131072> >,
generic_wide_int<wi::extended_tree<131072> > > (x=..., y=...,
sgn=UNSIGNED) at /space/rguenther/src/gcc/gcc/wide-int.h:3549
#3 0x00000000011d564d in multiple_of_p (
type=<integer_type 0x7ffff702b2a0 signed char>,
top=<ssa_name 0x7ffff7016f30 2>, bottom=<integer_cst 0x7ffff702d000>,
nowrap=true) at /space/rguenther/src/gcc/gcc/fold-const.cc:14554
#4 0x00000000011caa58 in fold_binary_loc (loc=0, code=BIT_AND_EXPR,
type=<integer_type 0x7ffff702b2a0 signed char>,
op0=<ssa_name 0x7ffff7016f30 2>, op1=<integer_cst 0x7ffff702d000>)
at /space/rguenther/src/gcc/gcc/fold-const.cc:12112
#5 0x00000000011d4356 in fold_build2_loc (loc=0, code=BIT_AND_EXPR,
type=<integer_type 0x7ffff702b2a0 signed char>,
op0=<ssa_name 0x7ffff7016f30 2>, op1=<integer_cst 0x7ffff702d000>)
at /space/rguenther/src/gcc/gcc/fold-const.cc:14128
#6 0x0000000001848eba in analyze_and_compute_bitop_with_inv_effect (
loop=0x7ffff700e4b0, phidef=<ssa_name 0x7ffff71e5000 4>,
niter=<plus_expr 0x7ffff71f2230>)
at /space/rguenther/src/gcc/gcc/tree-scalar-evolution.cc:3719
and we end up with
(gdb) p divisor_blocks_needed
$36 = 4096
if (remainder)
{
*remainder_len = wi_pack (remainder, b_remainder, n, dividend_prec);
(gdb) p n
$50 = 4096
(gdb) p dividend_prec
$51 = 128
(gdb) p remainder
$52 = (long *) 0x7fffffffc990
(gdb) p b_remainder
$53 = (unsigned int *) 0x7ffffffec0f0
and that wi_pack faults.
