nir: Rename parallel_copy_copy to parallel_copy_entry and add a foreach macro

parallel_copy_copy was a silly name.  Also, things were getting long and
annoying, so I added a foreach macro.  For historical reasons, several of
the original iterations over parallel copy entries in from_ssa used the
_safe variants of the loop.  However, all of these no longer ever remove an
entry so it's ok to make them all use the normal iterator.

Reviewed-by: Connor Abbott <[email protected]>

1 files changed, 11 insertions, 2 deletions

diff --git a/src/glsl/nir/nir.h b/src/glsl/nir/nir.h
index 7e74128462a..c6134f939d6 100644
--- a/src/glsl/nir/nir.h
+++ b/src/glsl/nir/nir.h
@@ -962,11 +962,20 @@ typedef struct {
    struct exec_node node;
    nir_src src;
    nir_dest dest;
-} nir_parallel_copy_copy;
+} nir_parallel_copy_entry;
+
+#define nir_foreach_parallel_copy_entry(pcopy, entry) \
+   foreach_list_typed(nir_parallel_copy_entry, entry, node, &(pcopy)->entries)
 
 typedef struct {
    nir_instr instr;
-   struct exec_list copies;
+
+   /* A list of nir_parallel_copy_entry's.  The sources of all of the
+    * entries are copied to the corresponding destinations "in parallel".
+    * In other words, if we have two entries: a -> b and b -> a, the values
+    * get swapped.
+    */
+   struct exec_list entries;
 } nir_parallel_copy_instr;
 
 NIR_DEFINE_CAST(nir_instr_as_alu, nir_instr, nir_alu_instr, instr)