| Issue |
141753
|
| Summary |
[InstCombine] Missed optimization for add + and + icmp pattern
|
| Labels |
llvm:instcombine,
missed-optimization
|
| Assignees |
|
| Reporter |
nikic
|
https://alive2.llvm.org/ce/z/7A_uJr
```llvm
define i1 @src(i8 range(i8 0, 4) %arg) {
%add = add nsw i8 %arg, -1
%and = and i8 %add, -3
%cmp = icmp eq i8 %and, 0
ret i1 %cmp
}
define i1 @tgt(i8 range(i8 0, 4) %arg) {
%and = and i8 %arg, 1
%cmp = icmp ne i8 %and, 0
ret i1 %cmp
}
```
Not sure how to generalize this best.
![]()
_______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
