llvm-project

95acd8de - [mlir][scf] fix canonicalization of unsigned scf.for/scf.parallel loops (#235272)

[mlir][scf] fix canonicalization of unsigned scf.for/scf.parallel loops (#235272) - `constantTripCount` didn't check the signedness of `diff` before checking whether it is negative, so it returned the trip count as 0 for unsigned loops with "non-constant bound" - problem A according to the issue - update `constantTripCount` call to use `getUnsignedCmp` to check for signedness and only merge loops with the same signedness in `ParallelOpSingleOrZeroIterationDimsFolder` - problem B* according to the issue fixes #233223 claude helped me with the tests