https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100647
Bug ID: 100647
Summary: ICE during sms pass
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: normal
Priority: P3
Component: rtl-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: kito at gcc dot gnu.org
Target Milestone: ---
Host: x86_64-linux-gnu
Target: riscv64-unknown-elf
Flags: -Ofast -fno-gcse -fmodulo-sched -freorder-blocks-and-partition
-fno-tree-dce -march=rv64gc -mabi=lp64
Testcase:
char c;
char *d;
char *e();
char *f(char *h) {
int a = *h;
return *h == 7 ? h : h + a;
}
char i() {
char *g, *b;
g = e();
for (; g; b = f(b))
if (c)
*d = 0;
return 0;
}
ICE Message:
during RTL pass: sms
sms.crash.c: In function 'i':
sms.crash.c:15:1: internal compiler error: in
cfg_layout_redirect_edge_and_branch_force, at cfgrtl.c:4651
15 | }
| ^
0x82a8a8 cfg_layout_redirect_edge_and_branch_force
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/cfgrtl.c:4651
0x8102d3 redirect_edge_and_branch_force(edge_def*, basic_block_def*)
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/cfghooks.c:490
0x810de5 make_forwarder_block(basic_block_def*, bool (*)(edge_def*), void
(*)(basic_block_def*))
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/cfghooks.c:903
0x81a88d merge_latch_edges
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/cfgloop.c:780
0x81a88d disambiguate_multiple_latches
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/cfgloop.c:831
0x81a88d disambiguate_loops_with_multiple_latches()
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/cfgloop.c:844
0xb35484 apply_loop_flags
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/loop-init.c:55
0xb3605c loop_optimizer_init(unsigned int)
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/loop-init.c:124
0x15b8039 sms_schedule
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/modulo-sched.c:1362
0x15bac1f execute
../../../../riscv-gnu-toolchain-trunk/riscv-gcc/gcc/modulo-sched.c:3359
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
ICE version:
Trunk, 11, 10
Note:
Work with GCC 9
