nir/lower_int64: lower 64-bit amul
Fixes an issue with Renderdoc's shader debugging with ACO. If nir_opt_algebraic isn't called in-between nir_lower_explicit_io and nir_lower_int64, we can end up with 64-bit multiplications. Signed-off-by:Rhys Perry <pendingchaos02@gmail.com> Reviewed-by:
Daniel Schürmann <daniel@schuermann.dev> Fixes: 6320e37d ('nir: add amul instruction') Part-of: <mesa/mesa!5709> (cherry picked from commit 0868638a)