https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87065
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-08-23
CC| |segher at gcc dot gnu.org
Known to work| |6.4.1
Target Milestone|--- |7.4
Summary|ice in trunc_int_for_mode |[7/8/9 Regression] combine
| |causes ICE in
| |trunc_int_for_mode
Ever confirmed|0 |1
Known to fail| |7.1.0, 7.3.1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. We can simplify_binary_operation with
(gdb) p debug_rtx (op0)
(reg:V4SI 195)
$2 = void
(gdb) p debug_rtx (op1)
(const_int 1 [0x1])
(gdb) p code
$6 = MINUS
via
#8 0x0000000001bec108 in combine_simplify_rtx (x=0x7ffff6a65228,
op0_mode=E_V4SImode, in_dest=0, in_cond=0)
at /space/rguenther/src/gcc-sccvn/gcc/combine.c:5730
5730 temp = simplify_binary_operation (code, mode, XEXP (x, 0), XEXP
(x, 1));
(gdb) p debug_rtx (x)
(minus:V4SI (reg:V4SI 195)
(const_int 1 [0x1]))
...
#11 0x0000000001bee30e in combine_simplify_rtx (x=0x7ffff6a3dc40,
op0_mode=E_V4SImode, in_dest=0, in_cond=0)
at /space/rguenther/src/gcc-sccvn/gcc/combine.c:6367
6367 return simplify_if_then_else (x);
(gdb) p debug_rtx (x)
(if_then_else:V4SI (eq:V4SI (reg:V4SI 134 [ vect__6.22 ])
(reg:V4SI 169))
(minus:V4SI (reg:V4SI 195)
(eq:V4SI (reg:V4SI 134 [ vect__6.22 ])
(reg:V4SI 169)))
(reg:V4SI 196))
segher?
Use -O3 -march=bdver2
