The MLIR SVE integration tests are now enabled in the
clang-aarch64-full-2stage buildbot under emulation (QEMU) and one of the
sparse integration tests is failing [1]:
* Integration/Dialect/SparseTensor/CPU/concatenate_dim_1.mlir
That test is failing because we we don't have a LIT substitution to
replace:
```
; RUN: mlir-cpu-runner <command>
```
with
```
; RUN: <emulator> mlir-cpu-runner <command>
```
clang-aarch64-full-2stage does not support SVE natively and hence all
SVE integration tests require emulation. Other SVE tests use `lli` (for
which we do have the required substitution) and hence are not affected.
This patch simplifies concatenate_dim_1.mlir to always use fixed-width
vectorisation. We will re-enable scalable vectorisation once LIT
substitutions for `mlir-cpu-runner` are updated.
[1] https://lab.llvm.org/buildbot/#/builders/179/builds/6062
20bf8c403c