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We want to insert code in each of the predecessors of the end block.
This code includes a nir_if, which would split the block, altering
the set. To avoid that, I emitted a dead constant at the end of each
block before splitting it, so that the set of predecessors remained
unchanged. This was admittedly ugly.
Connor suggested instead saving a copy of the set, so we can iterate
it safely. This is also a little ugly, but a much better plan.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
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We want to insert the code at the end of the program. Looping over
all the functions (of which there was only one) was the old way of doing
this, but now we have nir_shader_get_entrypoint(), so let's use it.
Suggested by Connor Abbott.
v2: Update for nir_shader_get_entrypoint API change.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
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Fixes several GL44-CTS.tessellation_shader (and GL45 and ES31) subcases:
- vertex_spacing
- tessellation_shader_point_mode.points_verification
- tessellation_shader_quads_tessellation.inner_tessellation_level_rounding
Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
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