Matt Arsenault 5e79ae60a6 DAG: Fix vector_shuffle -> splat fold defining undef lanes (#123596) ...

For shuffle vector splats with undef lanes in the mask,
this was introducing real values. Filter out build_vector
results based on the undef elements in the mask.

This avoids AMDGPU test regressions in a future change.

test/CodeGen/X86/urem-seteq-illegal-types.ll looks worse
but I didn't investigate.

2025-01-21 23:55:50 +07:00

83 KiB

Raw Blame History

View Raw