https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84178
Bug ID: 84178
Summary: [7/8 Regression] ICE in release_bb_predicate
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
gcc-8.0.0-alpha20180128 snapshot (r257131) and gcc 7.3.0 ICE when compiling the
following snippet w/ -O3 -fno-tree-forwprop:
int zy, h4;
void
r8 (long int mu, int *jr, int *fi, short int dv)
{
do
{
int tx;
tx = !!h4 ? (zy / h4) : 1;
mu = tx;
*jr = (((unsigned char) mu > (254 >> dv)) ? 0 : (unsigned char) tx) +
*fi;
} while (*jr == 0);
r8 (mu, jr, fi, 1);
}
% gcc-8.0.0-alpha20180128 -O3 -fno-tree-forwprop -c rhoqpgf1.c
during GIMPLE pass: ifcvt
rhoqpgf1.c: In function 'r8.constprop':
rhoqpgf1.c:4:1: internal compiler error: in release_bb_predicate, at
tree-if-conv.c:286
r8 (long int mu, int *jr, int *fi, short int dv)
^~
0x664d68 release_bb_predicate
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180128/work/gcc-8-20180128/gcc/tree-if-conv.c:286
0x664d68 free_bb_predicate
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180128/work/gcc-8-20180128/gcc/tree-if-conv.c:300
0x664d68 tree_if_conversion(loop*)
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180128/work/gcc-8-20180128/gcc/tree-if-conv.c:2897
0xd092e5 execute
/var/tmp/portage/sys-devel/gcc-8.0.0_alpha20180128/work/gcc-8-20180128/gcc/tree-if-conv.c:2962
gcc 7 ICEs w/ different backtrace, though.
