| Issue |
126943
|
| Summary |
[RISCV] Miscompile caused by #126108 (Decompose single source shuffles (without exact VLEN))
|
| Labels |
new issue
|
| Assignees |
preames
|
| Reporter |
asb
|
There's active discussion on #126108, so this issue is written with some haste to provide a clear reproducer an doesn't have in-depth analysis and hasn't further reduced the input.
The simplest reproducer:
```
wget https://raw.githubusercontent.com/llvm/llvm-test-suite/refs/heads/main/SingleSource/Regression/C/gcc-c-torture/execute/20050826-2.c
$HOME/llvm-project/build/stage1/bin/clang \
--target=riscv64-linux-gnu \
-fuse-ld=lld \
--sysroot=$HOME/rvsysroot \
-O3 \
-march=rva23u64 -mllvm -force-tail-folding-style=data-with-evl -mllvm -prefer-predicate-over-epilogue=predicate-else-scalar-epilogue \
20050826-2.c
export QEMU_LD_PREFIX="$HOME/rvsysroot"
export QEMU_CPU="rv64,zba=true,zbb=true,zbc=false,zbs=true,zfhmin=true,v=true,vext_spec=v1.0,zkt=true,zvfhmin=true,zvbb=true,zvkt=true,zihintntl=true,zicond=true,zimop=true,zcmop=true,zcb=true,zfa=true,zawrs=true,rvv_ta_all_1s=true,rvv_ma_all_1s=true,rvv_vl_half_avl=true"
```
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
