https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99022
Bug ID: 99022
Summary: When ‘long int’ is 32 bits，the conversion between
'vector(2) int' and 'vector(2) long int' can't be done
without 'flax-vector-conversions'.
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: gengqi at linux dot alibaba.com
Target Milestone: ---
Created attachment 50150
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50150&action=edit
riscv64-unknown-linux-gnu-gcc -march=rv32imac -mabi=ilp32 needflax.c -O2 -S
riscv64-unknown-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/lhome/gengq/riscv64-linux-mastertest/bin/riscv64-unknown-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/lhome/gengq/riscv64-linux-mastertest/libexec/gcc/riscv64-unknown-linux-gnu/11.0.0/lto-wrapper
Target: riscv64-unknown-linux-gnu
Configured with:
/lhome/gengq/riscv-gnu-toolchain-master/riscv-gnu-toolchain/riscv-gcc/configure
--target=riscv64-unknown-linux-gnu
--prefix=/lhome/gengq/riscv64-linux-mastertest
--with-sysroot=/lhome/gengq/riscv64-linux-mastertest/sysroot --with-system-zlib
--enable-shared --enable-tls --enable-languages=c,c++,fortran
--disable-libmudflap --disable-libssp --disable-libquadmath
--disable-libsanitizer --disable-nls --disable-bootstrap --src=.././riscv-gcc
--disable-multilib --with-abi=lp64d --with-arch=rv64gcpxthead
'CFLAGS_FOR_TARGET=-O2 -mcmodel=medlow' 'CXXFLAGS_FOR_TARGET=-O2
-mcmodel=medlow'
Thread model: posix
riscv64-unknown-linux-gnu-gcc -march=rv32imac -mabi=ilp32 needflax.c -O2 -S
needflax.c: In function 'flax':
needflax.c:6:3: note: use '-flax-vector-conversions' to permit conversions
between vectors with differing element types or numbers of subparts
6 | return a;
| ^~~~~~
needflax.c:6:10: error: incompatible types when returning type 'int32x2_t' {aka
'__vector(2) int'} but 'lint32x2_t' {aka '__vector(2) long int'} was expected
6 | return a;
| ^
