https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115387
--- Comment #4 from Marc Poulhiès <dkm at gcc dot gnu.org> ---
This is command line that triggers the same error in all the nightly builds for
riscv32/64 compiler explorer.
```
$ riscv32-unknown-linux-gnu-gcc -g -O2 -march=rv32gc -mabi=ilp32d input.c
-c -std=gnu11 -fgnu89-inline -g -O2 -Wall -Wwrite-strings -Wundef
-fmerge-all-constants -frounding-math -fno-stack-protector -fno-common
-Wstrict-prototypes -Wold-style-definition -fmath-errno -fPIE
-ftls-model=initial-exec -nostdinc -o iovsprintf.o
iovsprintf.c: In function '__vsprintf_internal':
iovsprintf.c:34:1: error: definition in block 5 follows the use
34 | __vsprintf_internal (char *string, size_t maxlen,
| ^~~~~~~~~~~~~~~~~~~
for SSA_NAME: _9 in statement:
prephitmp_36 = (char *) _9;
during GIMPLE pass: widening_mul
iovsprintf.c:34:1: internal compiler error: verify_ssa failed
0x162fd0f verify_ssa(bool, bool)
/mnt/barryallen/dkm/git/crosstool-ng/.build/riscv32-unknown-linux-gnu/src/gcc/gcc/tree-ssa.cc:1203
0x1292a65 execute_function_todo
/mnt/barryallen/dkm/git/crosstool-ng/.build/riscv32-unknown-linux-gnu/src/gcc/gcc/passes.cc:2096
0x1292ece execute_todo
/mnt/barryallen/dkm/git/crosstool-ng/.build/riscv32-unknown-linux-gnu/src/gcc/gcc/passes.cc:2143
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.
```
