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/*
* Copyright © 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Jason Ekstrand (jason@jlekstrand.net)
*/
#include "nir.h"
/*
* Handles management of the metadata.
*/
void
nir_metadata_require(nir_function_impl *impl, nir_metadata required)
{
#define NEEDS_UPDATE(X) ((required & ~impl->valid_metadata) & (X))
if (NEEDS_UPDATE(nir_metadata_block_index))
nir_index_blocks(impl);
if (NEEDS_UPDATE(nir_metadata_dominance))
nir_calc_dominance_impl(impl);
if (NEEDS_UPDATE(nir_metadata_live_ssa_defs))
nir_live_ssa_defs_impl(impl);
#undef NEEDS_UPDATE
impl->valid_metadata |= required;
}
void
nir_metadata_preserve(nir_function_impl *impl, nir_metadata preserved)
{
impl->valid_metadata &= preserved;
}
#ifdef DEBUG
/**
* Make sure passes properly invalidate metadata (part 1).
*
* Call this before running a pass to set a bogus metadata flag, which will
* only be preserved if the pass forgets to call nir_metadata_preserve().
*/
void
nir_metadata_set_validation_flag(nir_shader *shader)
{
nir_foreach_function(function, shader) {
if (function->impl) {
function->impl->valid_metadata |= nir_metadata_not_properly_reset;
}
}
}
/**
* Make sure passes properly invalidate metadata (part 2).
*
* Call this after a pass makes progress to verify that the bogus metadata set by
* the earlier function was properly thrown away. Note that passes may not call
* nir_metadata_preserve() if they don't actually make any changes at all.
*/
void
nir_metadata_check_validation_flag(nir_shader *shader)
{
nir_foreach_function(function, shader) {
if (function->impl) {
assert(!(function->impl->valid_metadata &
nir_metadata_not_properly_reset));
}
}
}
#endif
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