[Mesa-dev] [RFC] nir/builder: Add support for easily building control-flow
Jason Ekstrand
jason at jlekstrand.net
Wed Feb 15 16:43:33 UTC 2017
---
src/compiler/nir/nir_builder.h | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
index 194d327..cdfc15b 100644
--- a/src/compiler/nir/nir_builder.h
+++ b/src/compiler/nir/nir_builder.h
@@ -81,6 +81,47 @@ nir_builder_cf_insert(nir_builder *build, nir_cf_node *cf)
nir_cf_node_insert(build->cursor, cf);
}
+static inline void
+nir_push_if(nir_builder *build, nir_ssa_def *condition)
+{
+ nir_if *nif = nir_if_create(build->shader);
+ nif->condition = nir_src_for_ssa(condition);
+ nir_builder_cf_insert(build, &nif->cf_node);
+ build->cursor = nir_before_cf_list(&nif->then_list);
+}
+
+static inline void
+nir_push_else(nir_builder *build)
+{
+ nir_block *block = nir_cursor_current_block(build->cursor);
+ nir_if *nif = nir_cf_node_as_if(block->cf_node.parent);
+ build->cursor = nir_before_cf_list(&nif->else_list);
+}
+
+static inline void
+nir_pop_if(nir_builder *build)
+{
+ nir_block *block = nir_cursor_current_block(build->cursor);
+ nir_if *nif = nir_cf_node_as_if(block->cf_node.parent);
+ build->cursor = nir_after_cf_node(&nif->cf_node);
+}
+
+static inline void
+nir_push_loop(nir_builder *build)
+{
+ nir_loop *loop = nir_loop_create(build->shader);
+ nir_builder_cf_insert(build, &loop->cf_node);
+ build->cursor = nir_before_cf_list(&loop->body);
+}
+
+static inline void
+nir_pop_loop(nir_builder *build)
+{
+ nir_block *block = nir_cursor_current_block(build->cursor);
+ nir_loop *loop = nir_cf_node_as_loop(block->cf_node.parent);
+ build->cursor = nir_after_cf_node(&loop->cf_node);
+}
+
static inline nir_ssa_def *
nir_ssa_undef(nir_builder *build, unsigned num_components, unsigned bit_size)
{
--
2.5.0.400.gff86faf
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