https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90211
Bug ID: 90211
Summary: [8/9 Regression] ICE: tree check: expected ssa_name,
have real_cst in first_readonly_imm_use, at
ssa-iterators.h:351
Product: gcc
Version: 9.0
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-9.0.0-alpha20190421 snapshot (r270485) ICEs when compiling the following
testcase w/ -O3 (-Ofast) -fassociative-math -ftree-parallelize-loops=2
-fno-signed-zeros -fno-trapping-math -fno-tree-copy-prop:
double
yk (int d9)
{
double vy, q4 = 0.0;
while (d9 < 3)
{
int tc;
vy = 0.0;
tc = 0;
while (tc < d9)
{
vy += 1.0;
++tc;
}
q4 += 1.0;
++d9;
}
return vy + q4;
}
% gcc-9.0.0-alpha20190421 -O3 -fassociative-math -ftree-parallelize-loops=2
-fno-signed-zeros -fno-trapping-math -fno-tree-copy-prop -c vnd2w3xt.c
during GIMPLE pass: parloops
vnd2w3xt.c: In function 'yk':
vnd2w3xt.c:2:1: internal compiler error: tree check: expected ssa_name, have
real_cst in first_readonly_imm_use, at ssa-iterators.h:351
2 | yk (int d9)
| ^~
0x6f1e75 tree_check_failed(tree_node const*, char const*, int, char const*,
...)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree.c:9900
0x69d256 tree_check(tree_node*, char const*, int, char const*, tree_code)
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree.h:3176
0x69d256 first_readonly_imm_use
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/ssa-iterators.h:351
0x69d256 try_create_reduction_list
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:2817
0x69d256 parallelize_loops
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:3392
0xe0583d execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:3506
0xe0583d execute
/var/tmp/portage/sys-devel/gcc-9.0.0_alpha20190421/work/gcc-9-20190421/gcc/tree-parloops.c:3485
