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nir: Add comments to nir_index_instrs and nir_index_ssa_defs

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The provided indices have the very nice property that if A dominates B then
A->index <= B->index.  We should document that somewhere.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand 2015-09-14 12:25:28 -07:00
parent 8ecaef967d
commit ddffe30f40
1 changed files with 8 additions and 0 deletions
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8
src/glsl/nir/nir.c
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@ -1427,6 +1427,10 @@ index_ssa_block(nir_block *block, void *state)
return true;
}
/**
* The indices are applied top-to-bottom which has the very nice property
* that, if A dominates B, then A->index <= B->index.
*/
void
nir_index_ssa_defs(nir_function_impl *impl)
{
@ -1445,6 +1449,10 @@ index_instrs_block(nir_block *block, void *state)
return true;
}
/**
* The indices are applied top-to-bottom which has the very nice property
* that, if A dominates B, then A->index <= B->index.
*/
unsigned
nir_index_instrs(nir_function_impl *impl)
{