nir: Allocate predecessor and dominance frontier sets from block itself.

These sets are part of the block, and their lifetime needs to match the
block itself.  So, allocate them using the block itself as the context.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>

diff --git a/src/glsl/nir/nir.c b/src/glsl/nir/nir.c
index e96f113f2b2636a5f4e3b5a054656a918f6d2b31..73d3008a0b330514538f27effd44b2a0a64b0f8d 100644 (file)
--- a/src/glsl/nir/nir.c
+++ b/src/glsl/nir/nir.c
@@ -285,10 +285,10 @@ nir_block_create(void *mem_ctx)
    cf_init(&block->cf_node, nir_cf_node_block);
 
    block->successors[0] = block->successors[1] = NULL;
-   block->predecessors = _mesa_set_create(mem_ctx, _mesa_hash_pointer,
+   block->predecessors = _mesa_set_create(block, _mesa_hash_pointer,
                                           _mesa_key_pointer_equal);
    block->imm_dom = NULL;
-   block->dom_frontier = _mesa_set_create(mem_ctx, _mesa_hash_pointer,
+   block->dom_frontier = _mesa_set_create(block, _mesa_hash_pointer,
                                           _mesa_key_pointer_equal);
 
    exec_list_make_empty(&block->instr_list);