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authorAlyssa Rosenzweig <[email protected]>2018-05-02 02:04:55 +0000
committerChristian Gmeiner <[email protected]>2018-05-18 22:44:09 +0200
commit5d85a0a55b8c061fa6644ac24163542e3025834c (patch)
tree4238fcc08e99f410588f3dec7498d4e86ddc1e03 /.gitattributes
parent8ed2cabd04c4697802f4d275f839640826e462ee (diff)
nir: Implement optional b2f->iand lowering
This pass is required by the Midgard compiler; our instruction set uses NIR-style booleans (~0 for true) but lacks a dedicated b2f instruction. Normally, this lowering pass would be implemented in a backend-specific algebraic pass, but this conflicts with the existing iand->b2f pass in nir_opt_algebraic.py, hanging the compiler. This patch thus makes the existing pass optional (default on -- all other backends should remain unaffected), adding an optional pass for lowering the opposite direction. v2: Defer lowering until late algebraic optimisations to allow optimising the b2f instruction itself. Signed-off-by: Alyssa Rosenzweig <[email protected]> Reviewed-by: Matt Turner <[email protected]> Reviewed-by: Christian Gmeiner <[email protected]>
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