agx: add foreach_reg_{src,dest}

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36399>

src/.clang-format

@@ -229,6 +229,8 @@ ForEachMacros:
   - agx_foreach_ssa_dest_rev
   - agx_foreach_ssa_src
   - agx_foreach_ssa_src_rev
+  - agx_foreach_reg_src
+  - agx_foreach_reg_dest
   - agx_foreach_successor
   - foreach_next_use
   - libagx_foreach_xfb

src/asahi/compiler/agx_compiler.h

@@ -728,6 +728,10 @@ void agx_block_add_successor(agx_block *block, agx_block *successor);
    agx_foreach_src_rev(ins, v)                                                 \
       if (ins->src[v].type == AGX_INDEX_NORMAL)
 
+#define agx_foreach_reg_src(ins, v)                                            \
+   agx_foreach_src(ins, v)                                                     \
+      if (ins->src[v].type == AGX_INDEX_REGISTER)
+
 #define agx_foreach_ssa_dest(ins, v)                                           \
    agx_foreach_dest(ins, v)                                                    \
       if (ins->dest[v].type == AGX_INDEX_NORMAL)
@@ -736,6 +740,10 @@ void agx_block_add_successor(agx_block *block, agx_block *successor);
    agx_foreach_dest_rev(ins, v)                                                \
       if (ins->dest[v].type == AGX_INDEX_NORMAL)
 
+#define agx_foreach_reg_dest(ins, v)                                           \
+   agx_foreach_dest(ins, v)                                                    \
+      if (ins->dest[v].type == AGX_INDEX_REGISTER)
+
 /* Phis only come at the start (after else instructions) so we stop as soon as
  * we hit a non-phi
  */