https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79451
Bug ID: 79451
Summary: [7 Regression] ICE in expand_expr_real_2, at
expr.c:9021 w/ -O3 -floop-nest-optimize
Product: gcc
Version: 7.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-e500v2-linux-gnuspe
7.0.0-alpha20170205 snapshot ICEs when compiling the following snippet w/ -O3
(or -Ofast) -floop-nest-optimize:
int dx;
void
bm (unsigned int ms)
{
int fe = dx;
unsigned int *gd = &ms;
for (ms = 0; ms < 1; ++ms)
gd = &dx;
while (fe < 1)
{
*gd /= dx;
*gd -= fe & 1;
++fe;
}
}
% powerpc-e500v2-linux-gnuspe-gcc-7.0.0-alpha20170205 -O3 -floop-nest-optimize
-w -c kfzgpxfl.c
kfzgpxfl.c: In function 'bm':
kfzgpxfl.c:4:1: internal compiler error: in expand_expr_real_2, at expr.c:9021
bm (unsigned int ms)
^~
0x312b1745f2d expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/expr.c:9021
0x312b1730b60 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/expr.c:9730
0x312b173c1fd expand_expr
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/expr.h:276
0x312b173c1fd expand_operands(tree_node*, tree_node*, rtx_def*, rtx_def**,
rtx_def**, expand_modifier)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/expr.c:7672
0x312b174427a expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/expr.c:9521
0x312b15f5f61 expand_gimple_stmt_1
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cfgexpand.c:3677
0x312b15f5f61 expand_gimple_stmt
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cfgexpand.c:3737
0x312b15f7d8b expand_gimple_basic_block
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cfgexpand.c:5744
0x312b15fe48f execute
/var/tmp/portage/cross-powerpc-e500v2-linux-gnuspe/gcc-7.0.0_alpha20170205/work/gcc-7-20170205/gcc/cfgexpand.c:6357
It may be similar to PR71012, but I cannot reproduce that one w/ the current
7.0 snapshot.
