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nir: Return progress from nir_lower_var_copies().

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Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Matt Turner 2017-02-24 15:34:40 -08:00
parent b831b8d2e1
commit 19345fc160
2 changed files with 16 additions and 4 deletions
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2
src/compiler/nir/nir.h
View file

@ -2355,7 +2355,7 @@ bool nir_inline_functions(nir_shader *shader);
bool nir_propagate_invariant(nir_shader *shader);
void nir_lower_var_copy_instr(nir_intrinsic_instr *copy, nir_shader *shader);
void nir_lower_var_copies(nir_shader *shader);
bool nir_lower_var_copies(nir_shader *shader);
bool nir_lower_global_vars_to_local(nir_shader *shader);

18
src/compiler/nir/nir_lower_var_copies.c
View file

@ -154,10 +154,11 @@ nir_lower_var_copy_instr(nir_intrinsic_instr *copy, nir_shader *shader)
&copy->variables[1]->deref, shader);
}
static void
static bool
lower_var_copies_impl(nir_function_impl *impl)
{
nir_shader *shader = impl->function->shader;
bool progress = false;
nir_foreach_block(block, impl) {
nir_foreach_instr_safe(instr, block) {
@ -171,19 +172,30 @@ lower_var_copies_impl(nir_function_impl *impl)
nir_lower_var_copy_instr(copy, shader);
nir_instr_remove(&copy->instr);
progress = true;
ralloc_free(copy);
}
}
if (progress)
nir_metadata_preserve(impl, nir_metadata_block_index |
nir_metadata_dominance);
return progress;
}
/* Lowers every copy_var instruction in the program to a sequence of
* load/store instructions.
*/
void
bool
nir_lower_var_copies(nir_shader *shader)
{
bool progress = false;
nir_foreach_function(function, shader) {
if (function->impl)
lower_var_copies_impl(function->impl);
progress |= lower_var_copies_impl(function->impl);
}
return progress;
}