By adding the line number of the split point immediately after the file
name (separated by `:`) this is recognized by various tool as a proper
location.
Ideally we would want to point to the line of the error, but that would
require some very invasive changes I suspect.
Reviewed By: jpienaar
Differential Revision: https://reviews.llvm.org/D93363
Similar to mlir-opt, having a -split-input-file mode is quite useful
in mlir-translate. It allows to put logically related tests in the
same test file for better organization.
PiperOrigin-RevId: 270805467
Mehdi Amini