https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92510
Bug ID: 92510
Summary: [10 Regression] ICE in native_encode_rtx, at
simplify-rtx.c:6272
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: x86_64-unknown-linux-gnu
gcc-10.0.0-alpha20191110 snapshot (r278028) ICEs when compiling the following
testcase w/ -O1 -ftree-loop-vectorize -fno-forward-propagate
-fno-tree-scev-cprop:
int cg;
long int
fp (long int sq)
{
signed char z1;
for (z1 = 0; z1 < 8; ++z1)
sq |= !!cg;
return sq + z1;
}
% x86_64-unknown-linux-gnu-gcc-10.0.0-alpha20191110 -O1 -ftree-loop-vectorize
-fno-forward-propagate -fno-tree-scev-cprop -c nh0rq49t.c
during RTL pass: combine
nh0rq49t.c: In function 'fp':
nh0rq49t.c:12:1: internal compiler error: in native_encode_rtx, at
simplify-rtx.c:6272
12 | }
| ^
0x665fd0 native_encode_rtx(machine_mode, rtx_def*, vec<unsigned char, va_heap,
vl_ptr>&, unsigned int, unsigned int)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/simplify-rtx.c:6272
0xc561be simplify_subreg(machine_mode, rtx_def*, machine_mode, poly_int<1u,
unsigned long>)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/simplify-rtx.c:6714
0xc5673e simplify_gen_subreg(machine_mode, rtx_def*, machine_mode, poly_int<1u,
unsigned long>)
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/simplify-rtx.c:7003
0x13eb54a if_then_else_cond
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:9474
0x13eb3c1 if_then_else_cond
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:9339
0x13f7c4f combine_simplify_rtx
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:5839
0x13fa5ac subst
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:5721
0x13fa1f9 subst
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:5654
0x13fa421 subst
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:5583
0x13fc2e5 try_combine
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:3413
0x14023a1 combine_instructions
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:1305
0x14023a1 rest_of_handle_combine
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:15058
0x14023a1 execute
/var/tmp/portage/sys-devel/gcc-10.0.0_alpha20191110/work/gcc-10-20191110/gcc/combine.c:15103
