| Issue |
86063
|
| Summary |
missed fold, reverse(op(reverse(v))) => op(v)
|
| Labels |
new issue
|
| Assignees |
zhengyang92
|
| Reporter |
zhengyang92
|
https://godbolt.org/z/3WdeKEY6d
https://alive2.llvm.org/ce/z/e3zfhB
```
define <8 x i1> @src(<8 x i32> %0) {
entry:
%2 = shufflevector <8 x i32> %0, <8 x i32> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
%3 = icmp eq <8 x i32> %2, zeroinitializer
%4 = shufflevector <8 x i1> %3, <8 x i1> poison, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
ret <8 x i1> %4
}
define <8 x i1> @tgt(<8 x i32> %0) {
entry:
%ieq = icmp eq <8 x i32> %0, zeroinitializer
ret <8 x i1> %ieq
}
```
@regehr @dtcxzyw
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