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nir/search: Allow for matching variables based on types

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This allows you to match on an unknown value but only if it is of a given
type.  90% of the uses of this are for matching only booleans, but adding
the generality of arbitrary types is no more complex.

nir_algebraic.py doesn't handle this yet but that's ok because the C
language will ensure that the default type on all variables is void.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand
2015-01-28 16:29:21 -08:00
parent d8999bcdce
commit 026b5cc792
2 changed files with 23 additions and 0 deletions
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11
src/glsl/nir/nir_search.c
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@@ -82,6 +82,17 @@ match_value(const nir_search_value *value, nir_alu_instr *instr, unsigned src,
instr->src[src].src.ssa->parent_instr->type != nir_instr_type_load_const)
return false;
if (var->type != nir_type_invalid) {
if (instr->src[src].src.ssa->parent_instr->type != nir_instr_type_alu)
return false;
nir_alu_instr *src_alu =
nir_instr_as_alu(instr->src[src].src.ssa->parent_instr);
if (nir_op_infos[src_alu->op].output_type != var->type)
return false;
}
state->variables_seen |= (1 << var->variable);
state->variables[var->variable].src = instr->src[src].src;
state->variables[var->variable].abs = false;